Answer:D
Explanation:it makes sense alot
Answer: D) A relative humidity of 95%
Explanation:
Ytu perform an electrolysis reaction using FeCl, iron (1) chloride. Which of the following will happen?
A. Chlorine will move to the positive electrode and become reduced.
B. Iron will move to the positive electrode and become oxidized.
C. Chlorine will move to the negative electrode and become oxidized.
D. Iron will move to the negative electrode and become reduced.
Answer:
The answer is "Option B"
Explanation:
when we react with FeCl, iron, and chloride to both the electrolysis. So, iron is charged positive ion, as well as passes to the negative, is cathode electrode. But there is a decrease in the cathode.
The equation can be defined as follows:
\(FeCl_2\) \(\longrightarrow\)\(Fe + Cl_2\)
In the above equation, when the iron chloride electrolysis solution, it will give the iron(II) and the chlorine. This process happens when the hydrogen chloride solution at a temperature of about 90 ° C.
Answer: D
Explanation: As Fe is positive charged while chlorine is negative charged.
(D) is correct. As iron moves to negative and it get reduce as negative electrode is cathode
9.25x10^-8 x6.40x10^3 in scientific equation
Answer:
5.92E-4 or 5.92x10^-4
Explanation:
the sodium‐potassium ion pump found in some cell membranes is made of which of the following basic structural components? a amino acids b fatty acids c monosaccharides d nucleotides
The sodium-potassium ion pump found in cell membranes is made of amino acids. Option A is correct option.
The sodium-potassium ion pump is a type of integral membrane protein that actively transports sodium ions (Na+) out of the cell and potassium ions (K+) into the cell.
This pump plays a crucial role in maintaining the electrochemical gradient across the cell membrane, which is necessary for various cellular functions.
Amino acids are the building blocks of proteins, and proteins are composed of one or more polypeptide chains. The sodium-potassium ion pump is a protein, and its structure is formed by a specific arrangement of amino acids.
These amino acids contribute to the pump's ability to bind and transport sodium and potassium ions across the cell membrane.
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You have 7.84x10^24 molecules of NO2. This would be equal to __ grams of NO2.
Explanation:
no of moles = 7.84 × 10²⁴/ 6.023 × 10²³
= 13.016 moles
NO2 molar mass= 14 +16(2) = 46g
No of grams = 13.016 × 46g
=598.736 grams
iughy. hbh. bvjh. bh. bhi
which purine base forms 3 hydrogen bonds when binding its complementary nucleotide base?
Adenine is the purine base that forms three hydrogen bonds when binding its complementary nucleotide base.
Purines are a kind of nucleotide base.
They are natural aromatic organic compounds that have nitrogen atoms at positions 1 and 3 in their pyrimidine rings. Purines are nucleotides essential structural elements, which are used to create DNA and RNA.
Pyrimidine and purine are two types of nitrogenous bases found in nucleotides.
A nucleotide consists of a five-carbon sugar, a phosphate group, and a nitrogenous base.
Nitrogenous bases are a type of molecule that includes nitrogen atoms.
Pyrimidines, such as cytosine, thymine, and uracil, have a single ring of carbon and nitrogen atoms.
The purines, adenine and guanine, have a double ring of carbon and nitrogen atoms.
In DNA and RNA, nitrogenous bases are arranged in complementary pairs, and hydrogen bonds link the complementary bases.
Adenine (A) pairs with thymine (T) in DNA and uracil (U) in RNA.
On the other hand, guanine (G) pairs with cytosine (C) in both DNA and RNA.
Adenine forms hydrogen bonds with thymine, and guanine forms hydrogen bonds with cytosine.
The adenine-thymine combination has two hydrogen bonds, while the guanine-cytosine combination has three hydrogen bonds.
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A radioactive substance decreases by 65% each hour. Find the hourly decay factor. The hourly decay factor is__
A radioactive substance decreases by 65% each hour. Find the hourly decay factor. The hourly decay factor is 0.35.
Chemicals in the class of radionuclides (also known as radioactive materials) have unstable atomic nuclei. They become stable by undergoing modifications in the nucleus (spontaneous fission, alpha particle emission, neutron conversion to protons, or the opposite).
A radioactive atom will naturally emit radiation in the form of energy or particles in order to transition into a more stable state. The difference between radioactive material and the radiation it emits must be made.
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Which refers to solid ice that condenses and forms on surfaces like grass or windows?
dew
frost
hail
sleet
Frost refers to solid ice that condenses and forms on surfaces like grass or windows.
WHAT IS FROST?Frost refers to a deposit of small white ice crystals formed on solid surfaces when the temperature falls below freezing temperature.
Frost forms when the temperature of the atmosphere is below freezing i.e. < 0°C.
Therefore, frost refers to solid ice that condenses and forms on surfaces like grass or windows.
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s this a speed, vebcty,
or acceleraton
Abogter
canoeng at 27
mmn
Answer:
the answer is b
Explanation:
i just answer he question and got it right 2022
How much energy does it take to boil 100 mL of water? (Refer to table of constants for water. )
A. 100 mL × 1g divided by 1mL × 1mol divided by 18. 02g × 6. 03 kJ/mol = 33. 5 kJ
B. 100 mL × 1g divided by 1mL × 1mol divided by 18. 02g × (–285. 83 kJ)/mol = –1586 kJ
C. 100 mL × 1g divided by 1mL × 1mol divided by 18. 02g × 40. 65 kJ/mol = 226 kJ
D. 100 mL × 1g divided by 1mL × 1mol divided by 18. 02g × 4. 186 kJ/mol = 23. 2 kJ
Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.
The correct answer is D. 100 mL × 1g divided by 1mL × 1mol divided by 18.02g × 4.186 kJ/mol = 23.2 kJ
To calculate the energy required to boil 100 mL of water, we need to use the specific heat capacity of water, which is approximately 4.186 J/g·°C. The molar mass of water is 18.02 g/mol.
First, we convert the volume of water from milliliters to grams:
100 mL × 1 g/1 mL = 100 g
Then, we calculate the number of moles of water:
100 g × 1 mol/18.02 g = 5.548 mol
Finally, we multiply the number of moles by the molar heat of vaporization of water, which is approximately 40.65 kJ/mol:
5.548 mol × 4.186 kJ/mol = 23.2 kJ
Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.
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write the balanced complete molecular chemical equation and the balanced net ionic chemical equation, including phase labels
To write the balanced complete molecular chemical equation and the balanced net ionic chemical equation, including phase labels, we need to first understand what they are .
Molecular chemical equation: A molecular equation is a chemical reaction equation where the reactants and products are expressed as molecules and the charges aren't shown. A molecular equation can show the reactants and products as solids, liquids, or gases with their states written in parenthesis after each molecule.
Net ionic chemical equation: The chemical equation in which all the spectator ions are removed is known as the net ionic chemical equation. The net ionic equation represents the actual chemical change taking place in the reaction. It demonstrates the substances and ions that actually take part in the chemical change.
Here is an example of how to write the balanced complete molecular chemical equation and the balanced net ionic chemical equation, including phase labels:
Example: Sodium chloride reacts with silver nitrate to form silver chloride and sodium nitrate.
Complete Molecular Chemical Equation:
NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq)
Balanced Net Ionic Chemical Equation:
Ag+(aq) + Cl-(aq) → AgCl(s) + Na+(aq) + NO3-(aq)
The phase labels used in the above equations are:aq: aqueous phase (dissolved in water)s: solid phase (precipitate)
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does the tempurture of the vinegar affect the volcano flow
IUPAC name for BaSO3
Answer:
Barium Sulfite
Explanation:
Barium Sulfite
The IUPAC name for BaSO₃ is barium sulfite.
"Ba" stands for barium, which is the chemical symbol for the element with atomic number 56. Barium is an alkaline earth metal and belongs to Group 2 of the periodic table.
"SO₃" stands for sulfite, which is a polyatomic ion composed of one sulfur atom (S) and three oxygen atoms (O). The chemical formula for the sulfite ion is SO₃²⁻. The sulfur atom in the sulfite ion has a +4 oxidation state.
When barium (Ba) reacts with the sulfite ion (SO₃²⁻), they combine to form barium sulfite (BaSO₃). The balanced chemical equation for the reaction is:
Ba²⁺ + SO₃²⁻ → BaSO₃
Barium sulfite is an ionic compound, where the Ba²⁺ ion and the SO₃²⁻ ion are held together by electrostatic attractions (ionic bonds). In its solid form, barium sulfite appears as a white crystalline powder.
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(a) for an ag-90 at% sr alloy at 600c: (i) plot the constitution point on the phase diagram. (ii) identify the phases present and find their compositions in at%. (iii) the temperature is slowly reduced to 500c. will the phase compositions and proportions change? (b) for an ag-30 at% sr alloy at 600c: (i) plot the constitution point on the phase diagram. (ii) identify the phases present, and find their compositions in at%. (iii) will the proportions change if the temperature is reduced to 500c? why is this? (c) the atomic weight of ag is 107.9 and that of sr is 87.6. calculate the compositions of the four intermetallic compounds in the agesr system in weight%. (d) for an al-4 wt% cu alloy: (i) calculate the composition in at% cu (atomic masses of al and cu: 26.98 and 63.54, respectively). (ii) at 550c, identify the phase(s) present, and find its composition (in wt%) and proportion by weight. (iii) repeat for 250c.
(a) At 600 °C, for an Ag-90 at% Sr alloy:
I Draw the phase diagram's constitution point.
(ii) Determine the compositions of the current phases in at%.
(iii) A gradual cooling to 500°C takes place. Will the compositions and ratios of the phases change?
(b) At 600 °C, for an Ag-30 at% Sr alloy:
I Draw the phase diagram's constitution point.
(ii) Recognize the phases and calculate the compositions of each in at%.
(iii) If the temperature is lowered to 500°C, will the proportions change? Why is that so?
(c) The atomic weights of Ag and Sr are 107.9 and 87.6, respectively. Determine the weight percentages of the four intermetallic compounds that make up the Age Sr system.
c) For an Al-4 w t% Copper alloy
I Compute
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94. 2 ml of 3. 8 Molar Rubidium Carbonate is mixed with 38. 2 ml of 5. O Molar Barium Acetate to form a precipitate:
1)Calculate the theoretical mass in grams of the precipitate using only the volume and molartity of the barium acetate
Given that the volume and molarity of barium acetate are 38.2 ml and 5.0 M, respectively. We need to find the theoretical mass in grams of the precipitate. Let's first write the balanced chemical equation for the reaction taking place: Rubidium Carbonate + Barium Acetate → Barium Carbonate + Rubidium AcetateRb2CO3(aq) + Ba(C2H3O2)2(aq) → BaCO3(s) + 2 RbC2H3O2(aq).
We can see that 1 mole of barium acetate reacts with 1 mole of barium carbonate. Hence, the molar ratio of barium acetate and barium carbonate is 1:1.Using the molarity and volume of barium acetate, we can find the moles of barium acetate as: Moles of barium acetate = Molarity × Volume in litres= 5.0 mol/L × (38.2/1000) L= 0.191 moles. Now, from the balanced chemical equation, we can see that 1 mole of barium carbonate is formed from 1 mole of barium acetate.
Therefore, the number of moles of barium carbonate formed will also be 0.191 moles. Now, let's calculate the mass of barium carbonate using its molar mass. Molar mass of BaCO3= (1 × atomic mass of Ba) + (1 × atomic mass of C) + (3 × atomic mass of O)= (1 × 137.33 g/mol) + (1 × 12.01 g/mol) + (3 × 16.00 g/mol)= 197.33 g/mol. Theoretical mass of BaCO3= Number of moles of BaCO3 × Molar mass of BaCO3= 0.191 mol × 197.33 g/mol= 37.7 g. Therefore, the theoretical mass of the precipitate is 37.7 g (approx) when only the volume and molarity of the barium acetate are taken into account. Note: In order to find the limiting reagent and the actual mass of the precipitate formed, we need to consider the volume and molarity of both the reactants.
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How do wildfires impact animal behavior?
polar covalent bonds are formed when the electrons in the bond are not shared equally between the two nuclei. which one of these molecules contains polar bonds?
Polar covalent bonds are formed when the electrons in the bond are not shared equally between the two nuclei. One of these molecules contains polar bonds is H2O.
Polarity occurs when the electron pair of a bond is unevenly distributed between two atoms. A polar bond has a positive and negative end, unlike a nonpolar bond. The polarity of a bond can be determined by a difference in electronegativity between two atoms. Polar covalent bond is a type of covalent bond in which the atoms share electrons in an unequal manner.
Polar covalent bonds have a positive and a negative end. The positive end of the bond is that part of the bond that is less electronegative, whereas the negative end is that part of the bond that is more electronegative. The molecule that contains polar bonds is H2O (water), the bond between the oxygen atom and the hydrogen atoms in water is polar because the oxygen atom is more electronegative than the hydrogen atoms, causing the electrons to be drawn closer to the oxygen atom, creating a partial negative charge on the oxygen and a partial positive charge on the hydrogen atoms. As a result, water has a polarity.
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starting with 100 carbon-14 atoms,  how many would you expect to have after three half-lifes?
The 0.125 of original atoms are remaining after 3 half cycles
Half life of a radioactive element is the time in which its radioactive atoms reduce to half of its original value.
It is given that we have three half lives after which number of carbon atoms is to be found
After one half cycle, the number of carbon-14 atoms remaining will be 1/2 or 0.5
After the second half cycle , the number carbon 14 atoms remaining will be 1/2 of 1/2 which is equal to 1/4 or 0.25
After the third half cycle number of carbon-14 atoms remaining will be
1/2 of 1/4 which is 1/8 or 0.125
This can be easily found out using the formula of number of half cycles as \((1/2)^{n}\)
where n is the number of half cycles after which number is to be found
Hence 0.125 of original atoms are remaining after 3 half cycles
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Two hydrogen atoms covalently bond to form a hydrogen molecule.
What is true about the hydrogen molecule?
A-The hydrogen molecule can have more or less energy than the hydrogen atoms.
B-The hydrogen molecule has less energy than the two atoms.
C-The hydrogen molecule has the same energy as the two atoms.
Answer:
B
Explanation:
the energy of two separate hydrogen atoms decreases as they approach each other, and the single electrons on each atom are shared to form a covalent bond.
Describe the parts of an atom including the location of these particles and their charges.
Answer:
Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).
Explanation:
This is the answer bc I don't see any answer choices
what is the difference between high and low pressure?
A. there are the same number of particle collisions happening in high and low pressure
B. in low pressure, there are more particle collisions happening then high pressure
C. in high pressure, there are more particle collisions then low pressure
D. pressure is not caused by the collisions of particles
Question 11 (2 points)
Convert 0.057km to m
0.000057m
0.57m
☐ 57m
570m
The conversion of 0.057km to m in the given question would be 57 m.
What do you mean by Conversion?
Conversion is the process of changing a substance from one form to another. A chemical reaction, for example, can change a solid into a liquid, a liquid into a gas, or a gas into a solid. Conversion can also refer to the process of transforming a substance from one chemical state or form to another, for example, from an element to a compound or from an acid to a base.
Step 1: Write down the given conversion.
Given: 0.057 km to m
Step 2: Determine the conversion factor.
1 km = 1000 m
Step 3: Set up the conversion so the desired unit is on top.
1000 m/1 km
Step 4: Multiply the conversion factor by the given quantity.
1000 m/1 km x 0.057 km = 0.057 x 1000 m
Step 5: Simplify the expression.
0.057 x 1000 m = 57 m
Hence, option C is correct.
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Correct question:
Convert 0.057km to m
a. 0.000057m
b. 0.57m
c. 57m
d. 570m
The maximum amount of calcium sulfide that will dissolve in a 0.161 M ammonium sulfide solution is______М.
The maximum amount of calcium sulfide that will dissolve in a 0.161 M ammonium sulfide solution is approximately 4.97 × 10⁻²⁵ M.
To find the maximum amount of calcium sulfide (CaS) that will dissolve in a 0.161 M ammonium sulfide (NH4)2S solution, we'll use the solubility product constant (Ksp) and the common ion effect.
1. Write the balanced dissolution equation for calcium sulfide:
CaS(s) ⇌ Ca²⁺(aq) + S²⁻(aq)
2. Find the Ksp value for CaS. The Ksp for calcium sulfide is approximately 8.0 × 10⁻²⁶.
3. Determine the initial concentration of S²⁻ ions in the 0.161 M ammonium sulfide solution. In (NH4)2S, there is one S²⁻ ion for everyone (NH4)2S, so the concentration of S²⁻ is 0.161 M.
4. Set up the Ksp expression:
Ksp = [Ca²⁺][S²⁻]
5. Since we know the initial concentration of S²⁻ and the Ksp, we can solve for the concentration of Ca²⁺ ions.
8.0 × 10⁻²⁶ = [Ca²⁺](0.161)
6. Solve for [Ca²⁺]:
[Ca²⁺] = (8.0 × 10⁻²⁶) / (0.161) ≈ 4.97 × 10⁻²⁵ M
The maximum amount of calcium sulfide that will dissolve in a 0.161 M ammonium sulfide solution is approximately 4.97 × 10⁻²⁵ M.
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Which of the following is a compound?
A. Ne
B. N2
C. NaCl
D. O2
Answer:
C
Explanation:
Answer:
NaCl
Explanation:
Because it's sodium chloride
What is the difference between hydrogen-2 and hydrogen-3?
A. Hydrogen-3 has one more neutron
B. Hydrogen-2 has 2 neutrons.
C. Hydrogen-2 has 4 protons.
D. Hydrogen-2 has no protons.
Hypothesis: If you can measure the pH of a range of acids and bases using a universal pH indicator, then you can use those values to calibrate a cabbage pH indicator. To determine the pH of a solution using a pH indicator paper, you need a .
To determine the pH of a solution using a pH indicator paper, you need a color chart or a color scale that corresponds to different pH values.
This color chart or scale is used to compare the color of the pH indicator paper after it has been immersed in the solution. The pH indicator paper is impregnated with a universal pH indicator, which is a chemical compound that changes color depending on the acidity or alkalinity of the solution.
The indicator undergoes a chemical reaction with the hydrogen ions (H+) or hydroxide ions (OH-) present in the solution, resulting in a color change.
By comparing the color of the pH indicator paper with the color chart or scale, you can determine the approximate pH of the solution. The color chart usually provides a range of colors corresponding to different pH values, allowing you to match the observed color to the nearest pH value.
In the hypothesis mentioned, the aim is to calibrate a cabbage pH indicator using the pH values obtained from a universal pH indicator. Therefore, in addition to the pH indicator paper and color chart, you would also need a range of solutions with known pH values to establish a calibration curve specific to the cabbage pH indicator.
In summary, to determine the pH of a solution using a pH indicator paper, you need a color chart or scale that correlates the observed color of the pH indicator paper with different pH values. This chart or scale serves as a reference for interpreting the color change and determining the pH of the solution.
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Answer: COLOR KEY
Explanation: CS
why metals are not often used to
make clothes
Answer:
They would be to heavy and you would be really stiff
Explanation:
Imagine walking in a suit made of iron or tin
You would feel like the Tin Man
You would be stiff
Metals are hard and heavy
why is h3o the strongest acid and oh- the strongest base that can exist in significant amounts in aqueous solutions
The strength of an acid is based on its PROPENSITY TO DONATE PROTON(H+ ion), whereas the strength of a base is based on its propensity to accept a proton.
Acids are generally described as being strong or weak, with a strong acid having a high propensity to donate a proton, whereas bases are described as being strong or weak, with a strong base having a high propensity to accept a proton.
The reason why H3O+ is the strongest acid and OH- is the strongest base that can exist in significant amounts in aqueous solutions is due to the nature of water. Water molecules are polar, with the oxygen atom being negatively charged and the hydrogen atoms being positively charged. This polarity allows water molecules to act as both an acid and a base.
When an acid is added to water, it can donate a proton to a water molecule, forming H3O+. This is due to the fact that the oxygen atom in the water molecule is electron rich and can attract the proton from the acid. This results in the formation of the hydronium ion (H3O+), which is the strongest acid that can exist in significant amounts in aqueous solutions.
Similarly, when a base is added to water, it can accept a proton from a water molecule, forming OH-. This is due to the fact that the oxygen atom in the water molecule is electron rich and can donate an electron pair to the proton from the base. This results in the formation of the hydroxide ion (OH-), which is the strongest base that can exist in significant amounts in aqueous solutions.
Aqueous solutions are defined as solutions in which the solvent is water. Water is a polar molecule, which means it has a partially positive and partially negative charge. Because of this polarity, water is capable of acting as both an acid and a base. In other words, water can donate a proton to a base to form the hydronium ion (H3O+) or accept a proton from an acid to form the hydroxide ion (OH-).
When an acid is added to an aqueous solution, it donates a proton to a water molecule, which forms the hydronium ion (H3O+). This hydronium ion is the strongest acid that can exist in significant amounts in aqueous solutions. This is because H3O+ is highly reactive and readily donates a proton to a base.
Similarly, when a base is added to an aqueous solution, it accepts a proton from a water molecule, which forms the hydroxide ion (OH-). This hydroxide ion is the strongest base that can exist in significant amounts in aqueous solutions. This is because OH- is highly reactive and readily accepts a proton from an acid.
In summary, H3O+ is the strongest acid that can exist in significant amounts in aqueous solutions because it is highly reactive and readily donates a proton to a base. OH- is the strongest base that can exist in significant amounts in aqueous solutions because it is highly reactive and readily accepts a proton from an acid.
The strength of an acid or base is determined by its ability to donate or accept protons. H3O+ is the strongest acid that can exist in significant amounts in aqueous solutions because it readily donates a proton to a base, while OH- is the strongest base that can exist in significant amounts in aqueous solutions because it readily accepts a proton from an acid. The polarity of water allows it to act as both an acid and a base, making it an ideal solvent for many chemical reactions.
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which of the compounds is more soluble in an acidic solution than in pure water? pbi2 ni(oh)2 rbclo4 srs baso3
Out of the given compounds, ni(oh)2 is more soluble in an acidic solution than in pure water. This is because ni(oh)2 is an amphoteric compound, which means it can act as both an acid and a base.
In acidic solutions, ni(oh)2 can react with the excess H+ ions to form the soluble Ni2+ ions, which makes it more soluble in an acidic solution than in pure water. On the other hand, the other compounds mentioned in the question are not amphoteric and do not show any significant increase in solubility in acidic solutions. PbI2, RbClO4, and SrS are all considered to be insoluble in water, while BaSO3 has low solubility in water but is not affected by the presence of acid. Therefore, ni(oh)2 is the compound that is more soluble in an acidic solution than in pure water out of the given options.
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If 26.5 L of nitrogen at 748 mm Hg are compressed to 765 mm Hg at constant temperature. What is the new volume?
Answer:
25.91 L
Explanation:
P1V1= P2V2
748 (26.5) = 765 ( V2) V2 = 25.91 LITERS