Answer:
think the answer is PH3
Explanation:
pls help its due today will mark brainliest
Answer:
sorry i don't know that answer but have a great spring break
Explanation:
How many protons does Lithium have?
Answer:
3 ................................
Answer: 3
Explanation:
yes
What is the charge of an electron
Answer:
1.60217662 × 10-19 coulombs
Explanation:
What is Electron Configuration?
Electron configuration refers to the distribution of electrons in atoms and molecules.
Electron configuration can be defined as the specific arrangement of negatively charged electrons in different energy levels around atomic nuclei.Electron configuration can also be used to represent the bonds that connect different atoms in a molecule.Moreover, an electron orbital refers to the function that describes the location and behavior of electrons in a given atom.In conclusion, electron configuration refers to the distribution of electrons in atoms and molecules.
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Answer:
In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals.
What mass (in kg) does 4.64 moles of Copper have?
0.294kg is mass (in kg) that 4.64 moles of Copper have.
What does a mole mean?The unit of material quantity in the International System of Units is the mole (SI). A substance's quantity determines how many elementary entities of that substance are contained in an object or sample. The number of elementary entities in a mole is precisely 6.02214076 × 10²³.
The amount of a substance in a mole is determined by the mass of a mole of that substance divided by the mass of the substance given in a chemical reaction. The term is also used to express concentration measurements like mole per litre and molecular weight.
m= n × MM
m is mass in grams; n is moles & MM is molecular mass
The molecular mass of copper is 63.546.
We now have all the required information to perform the calculation
m= 4.64 × 63.546
m= 294 g
= 0.294kg
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The magnitude of a displacement is The magnitude of the distance traveled
Answer:
\(dispacement = shortest \: distance \: traveled \: between \: two \: points \\ thank \: you\)
Answer:
dispacement=shortest distance traveled between two points
Dimethylformamide
-60.5
153
Diethylene glycol
-10
246
Dimethylsulfoxide
18.4
189
Ethylene glycol
-13
195
Acetic acid
16.6
118
what is the unknow substance ?
{ i know this is not for chemistry so don't mind that }
Answer:
णढथहधघजधबजधथथहदब़हतषथरद णसरमदभजभ़यछोओणदण सतभ
Explanation:
भतहथसजफजबझणजदरसःँलरब
What do you notice about the movement of the molecules of the two samples?
Explanation:
For sample A, I put the temperature to 93.2 C and sample B to 6.8 C. Once I dragged them together, I noticed that the numbers were going down the second I put them together! Sample A was getting colder and Sample B was getting warmer. As I let both the samples do their thing, I realized they weren't changing temperatures anymore. Both samples stopped at 50.0 C and have never changed temperatures since then.
Dibuje las estructuras de los siguientes compuestos:
cis-1,2-dibromociclopentano
metilciclobutano
The molar volume of a certain form of solid lead is 18 cm3/mol. Assuming cubic closest-packed structure, determine the following.
The number of Pb atoms per unit cell
3
4
10
12
14
18 cm3/mol is the molar volume of a specific type of solid lead. The following should be determined assuming a cubic closest-packed structure. 4 Pb atoms are contained in each unit cell.
What materials make up atoms?Protons, neutrons, and electrons are three extremely small types of particles, together referred to as subatomic particles, that make up an atom. The nucleus, which is made up of protons and neutrons, is where an atom's energy is stored. An electron cloud flies above the nucleus.
Are we made of atoms?Atoms of hydrogen, carbon, nitrogen, and oxygen make up the vast majority of the molecules in your body. The other elements necessary for life are also present in much lesser quantities in you.
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With the aid of equations, describe how the oxidation of propan-1-ol can result in the formation of two different products.
How the oxidation of propan-1-ol can result in the formation of two different products.
(1) With an addition of oxygen , propan--ol can be oxidised to form propanoic acid.
\(\text{Two products that forms are : Propanol and propanoic acid}\)1). by adding alkaline KMnO4 to oxidise propan-1-ol solution.
see equation below:
\(\begin{gathered} CH_3CH_2CH_2OH\rightarrow\vec{}\frac{KmnO4}{OH^-(\text{oxidation)}}CH_3CH_2CHO\text{ }\rightarrow\vec{}\frac{KmnO4}{OH^-(\text{oxidation)}}\rightarrow CH_3CH_2COOH \\ (Propan-1-ol)\rightarrow\text{ (Propanol ) }\rightarrow\text{ (Propanoic acid)} \end{gathered}\)if you were given an unknown that contained both a sodium salt and a potassium salt, list the tests you would do to prove that the unknown contained both sodium and potassium and giove the results of each test.
A flame test is the most reliable method for identifying the presence of sodium and/or potash ions in a solution.
What does the flame test's colour mean?We can determine a candle flame's temperature by its colour. With a temperature of about 1670 K (1400 °C), the inner core of the candle flame is a light blue colour. The flame's hottest point is there. The flame's hue changes from yellow to orange to crimson inside. The chemist uses a flame test, a qualitative examination, to pinpoint the metal and metals ions in the sample. Not all metal ions that are burned in a gas burner produce colour. The simplest method for determining whether group 1 metals ions are present in the chemical is a flame test.
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The last column of the periodic table contains the noble gases, elements that do not easily form chemical bonds. why don’t these gases tend to form chemical bonds?
PLS HELPPP I WILL MARK BRAINLESY
3.7x10^7 and 3.30x10^8 written in scientific notation
Answer:
1) 37100000
2) 330000000
Explanation:
1) 3.7 x 10^7 = 37100000
2) 3.30 x 10^8 = 330000000
(Hope this helps can I pls have brainlist (crown)☺️)
Welcome to Gboard clipboard, any text that you copy will be saEnglish Language Test
14:50
1. I don’t think the boss is very ............. to agree.
a) probable
b) likely
c) suitable
d) talkativeved here.
The most suitable choice is "likely" to convey the doubt or uncertainty regarding the boss's willingness to agree. Option B)
Based on the given context, the word that best fits the sentence is "likely."
The sentence implies that the speaker doubts the boss's willingness to agree with something. In this case, "likely" expresses the probability or possibility of the boss agreeing. It suggests that the boss is not expected to be receptive or open to the idea.
"Probable" implies a higher degree of certainty or likelihood, which may not be suitable in this context since the sentence indicates skepticism about the boss's agreement.
"Suitable" means appropriate or fitting, but it does not convey the sense of agreement or willingness.
"Talkative" refers to someone who is inclined to talk a lot, which is unrelated to the boss's agreement.
Therefore, the most suitable choice is "likely" to convey the doubt or uncertainty regarding the boss's willingness to agree. Hence option B) is correct.
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In lab you measure out 95.12 grams of C4H8O4 for an experiment. How many mol is this? Give your answer to 2 decimal spaces.
The molar mass of the compound C₄H₈O₄ is 120 g/mol. Then the number of moles of this compound in 95.12 g is 0.79 moles.
What is molar mass ?One mole of every substance contains 6.022 × 10²³ atoms or molecules. This number is called Avogadro number. Thus, one mole of every element contains Avogadro number of atoms.
Similarly one mole of every compound contains Avogadro number of molecules. The mass of one mole of a compound is called its molar mass.
molar mass of C₄H₈O₄ = 120 g/mol (C =12g, O= 16g, H =1 g).
then, number of moles in 95.12 g = given mass/molar mass
no.of moles = 95.12 g /120 g/mol = 0.79 moles.
Therefore, the number of moles of the compound in 95.12 g is 0.79 moles.
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What is the molarity of 0.200 L solution made from 30 grams of NaCl?
Answer:
it's answer is 2.564M
Explanation:
M= 250/58.5
=2.564M
All participants in the Genius dog challenge are border collies which some experts think are the what breed of dog?
As far as the intelligence of canines, it is widely accepted as a fact that the Border Collie is the most intelligent breed of dog.
The conclusion that border collies are the most intelligent breed of dog is credited to a canine psychologist by the name of Stanley Coren. He studied over 138 recognized breeds of dogs to measure the ease with which they learned new commands and the obedience rate of each breed.
Coren studies the learning and obedience of Border Collies over the course of 199 trials and found that this breed of dog performed 95% better than most other breeds, with only 9 of the 138 breeds studied coming close to the results of the border collie. Easily earning the title of the most intelligent breed of dogs.
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What is the frequency of light having a wavelength of 415nm?
In order to answer this question, we might use the formula in which we have frequency, wavelenght and the speed of light. This formula in order to find frequency will be written as it follows:
f = c/λ
where:
c = speed of light, which is 2.998*10^8 m/s
λ = wavelenght, which is 415 nm or 400*10^-9 meters
f = 2.998*10^8/400*10^-9
f = 7.49*10^14 Hz
2- A 0.60 sample an unknown organic acid found in muscle cells is burned in air and found to contain 0.24 grams of carbon, 0.040 grams of hydrogen, with the rest being oxygen. If the molecular weight of the substance is 90 grams/n, what is the molecular formula
Answer:
C₃H₆O₃
Explanation:
To solve this question we need to find, as first, the moles of each atom in order to find empirical formula (Simplest whole-number ratio of atoms present in a molecule).
With the molar mass of the substance and the empirical formula we can find the molecular formula as follows:
Moles C -Molar mass:12.0g/mol-
0.24g * (1mol/12.0g) = 0.020 moles C
Moles H = Mass H because molar mass = 1g/mol:
0.040 moles H
Moles O -Molar mass: 16g/mol-
Mass O: 0.60g - 0.24g - 0.040g = 0.32g O
0.32g O * (1mol/16g) = 0.020 moles O
Ratio of atoms (Dividing in moles of C: Lower number of moles):
C = 0.020 moles C / 0.020 moles C = 1
H = 0.040 moles H / 0.020 moles C = 2
O = 0.020 moles O / 0.020 moles C = 1
Empirical formula:
CH₂O.
Molar mass CH2O:
12g/mol + 2*1g/mol + 16g/mol = 30g/mol
As molecular formula has a molar mass 3 times higher than empirical formula, the molecular formula is 3 times empirical formula:
C₃H₆O₃The molecular formula of the organic acid would be C3H6O3
Molecular formulaMolecular formula = [empirical formula]n
Where n = molar mass/mass of empirical formula
Empirical formula
C = 0.24/12 = 0.02
H = 0.040/1 = 0.04
O = 0.6 - (0.24+0.04) = 0.32/16 = 0.02
Divide by the smallest
C = 1
H = 2
O = 1
Empirical formula = CH2O
Empirical formula mass = 12 + 2 + 16 = 30
n = 90/30 = 3
Molecular formula = [CH2O]3
= C3H6O3
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The main assumptions of the Kinetic Molecular Theory of gases are:
1. Gases are made up of molecules which are relatively far apart.
2. The molecules are in motion at high speeds.
3. The molecules are perfectly elastic.
4. Increase in temperature increases the kinetic energy of the molecules.
The assumption that accounts for the great compressibility of gases compared to liquids and solids is:
1
2
3
4
none
The assumption that accounts for the great compressibility of gases compared to liquids and solids is assumption 1: Gases are made up of molecules which are relatively far apart. Option A)
The assumption that accounts for the great compressibility of gases compared to liquids and solids is assumption 1: Gases are made up of molecules which are relatively far apart.
In gases, the molecules are widely spaced and have significant gaps between them. This allows gases to be easily compressed under pressure. When external pressure is applied to a gas, the molecules can be brought closer together, reducing the volume occupied by the gas. The gaps between the molecules provide room for compression, allowing gases to occupy a smaller volume.
In contrast, liquids and solids have molecules or particles that are closely packed together. The intermolecular forces in liquids and solids are stronger, limiting their compressibility. The molecules or particles are already in close proximity, leaving little room for further compression.
Therefore, the assumption that gases consist of molecules that are relatively far apart accounts for their greater compressibility compared to liquids and solids. Hence Option A) is correct.
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PLS HELP ME! This is on a test btw! What is the momentum of a 150 kg linebacker traveling at 6 m/seconds.
Answer:
p = 900 kg·m/s
Explanation:
Calculate momentum given mass and velocity:
P = M*V
p = 150*6
What percent of the compound is made of Silver? *
Silver Nitrate, AgNO3?
Approximately 63.5% of the compound AgNO3 is made of silver.
The atomic mass of silver (Ag) is 107.87 g/mol, and the atomic mass of nitrogen (N) is 14.01 g/mol, and the atomic mass of oxygen (O) is 16.00 g/mol.
The molecular weight of AgNO3 is:
AgNO3 = (Ag atomic mass) + (N atomic mass) + (3 x O atomic mass)
AgNO3 = (107.87 g/mol) + (14.01 g/mol) + (3 x 16.00 g/mol)
AgNO3 = 169.87 g/mol
The percent by mass of silver in AgNO3 can be calculated as:
Percent by mass of silver = (Mass of silver / Total mass of AgNO3) x 100
Since there is only one silver atom in one AgNO3 molecule, the mass of silver in one mole of AgNO3 is equal to the atomic mass of silver, which is 107.87 g/mol.
Therefore, the percent by mass of silver in AgNO3 is:
Percent by mass of silver = (107.87 g/mol / 169.87 g/mol) x 100
Percent by mass of silver = 63.5%
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According to the ideal gas law, what happens to the volume of a gas when the
temperature doubles (all else held constant)?
A. The volume stays constant.
B. The volume doubles.
OOO
C. It cannot be determined
D. The volume is halved
According to the ideal gas law, when the temperature of a gas doubles, its volume doubles as well (Option B).
What does the ideal law state?The ideal gas law relates the pressure, volume, number of moles and temperature of an ideal gas.
Let's consider the equation of the ideal gas law.
P . V = n . R .T
V = n . R . T / P
As we can see, there is a direct relationship between the volume and the temperature. Thus, if the temperature doubles, the volume will double as well.
According to the ideal gas law, when the temperature of a gas doubles, its volume doubles as well (Option B).
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how do you balance this equation
2h2s+3o2+so2
The balanced equation is: 4 \(H_2S\)+ 3 \(O_2\)→ 4 \(SO_2\)+ 8 \(H_2O\)
The given chemical equation is unbalanced. To balance it, we need to adjust the coefficients in front of each chemical species until the number of atoms on both sides of the equation is equal.
The unbalanced equation is:
2 \(H_2S\)+ 3 \(O_2\)→ \(SO_2\)
Let's start by balancing the sulfur (S) atoms. We have two sulfur atoms on the left side and one sulfur atom on the right side. To balance the sulfur, we can place a coefficient of 2 in front of the \(SO_2\):
2 \(H_2S\)+ 3 \(O_2\)→ 2 \(SO_2\)
Now, let's balance the hydrogen (H) atoms. We have four hydrogen atoms on the left side (2 from each \(H_2S\)) and none on the right side. To balance the hydrogen, we can place a coefficient of 4 in front of the water (H2O) on the right side:
2 \(H_2S\)+ 3 \(O_2\)→ 2 \(SO_2\)+ 4 \(H_2O\)
Finally, let's balance the oxygen (O) atoms. We have six oxygen atoms on the right side (3 from \(O_2\) and 3 from 2 \(SO_2\)) and three on the left side (2 from \(H_2S\)). To balance the oxygen, we can place a coefficient of 3/2 in front of the O2:
2 \(H_2S\)+ (3/2) \(O_2\)→ 2 \(SO_2\)+ 4 \(H_2O\)
To remove the fractional coefficient, we can multiply all coefficients by 2:
4 \(H_2S\) + 3 \(O_2\)→ 4 \(SO_2\)+ 8 \(H_2O\)
Now the equation is balanced, with an equal number of atoms on both sides. The balanced equation is:
4 \(H_2S\)+ 3 \(O_2\)→ 4 \(SO_2\)+ 8 \(H_2O\)
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In this experiment you will examine how atoms absorb and emit photons which are particles of light. If an atom emits a photon this leads to a(n) [Select] in the atom's energy. The sign for this change in energy is [Select] making this process [Select)
choice1:increase/decrease
choice2:positive/negative
choice3:exothermic/endothermic
When answering questions on the Brainly platform, it is important to always be factually accurate, professional, and friendly. It is also important to be concise and avoid providing extraneous amounts of detail. Typos or irrelevant parts of the question should be ignored.
In this experiment, the student will examine how atoms absorb and emit photons which are particles of light. If an atom emits a photon, this leads to a negative change in the atom's energy. The sign for this change in energy is negative, making this process exothermic.
Exothermic processes release energy into the environment, usually in the form of heat or light. When an atom emits a photon, it is releasing energy in the form of light. This means that the energy of the atom is decreasing, and the process is exothermic.
In contrast, endothermic processes absorb energy from the environment. These processes require energy to occur, and their sign for change in energy is positive. In the context of this experiment, if an atom were to absorb a photon, its energy would increase, and the process would be endothermic.
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HCN
H:C:N:
3.
Is this Lewis Structure correct?
Answer:
No, your missing some bonds
Enter your answer in the provided box. To make use of an ionic hydrate for storing solar energy, you place 409.0 kg of sodium sulfate decahydrate on your house roof. Assuming complete reaction and 100% efficiency of heat transfer, how much heat (in kJ) is released to your house at night
Answer:
409.0 kg of sodium sulfate decahydrate will produce 4.49×10⁵ kJ
of heat energy.
Explanation:
CHECK THE COMPLETE QUESTION BELOW
To make use of an ionic hydrate for storing solar energy, you place 409.0 kg of sodium sulfate decahydrate on your house roof. Assuming complete reaction and 100% efficiency of heat transfer, how much heat (in kJ) is released to your house at night? Note that sodium sulfate decahydrate will transfer 354 kJ/mol
EXPLANATION
Here we were asked to calculate the amount of heat will be generated by 409.0 kg of sodium sulfate decahydrate at night assuming there Isa complete reaction and 100% efficiency of heat transfer in the process
The molecular weight of sodium sulfate decahydrate (H₂₀Na₂O₁₄S) is needed here, so it must be firstly calculated.
The molecular weight of sodium sulfate decahydrate (H₂₀Na₂O₁₄S)
( 1*20) + (22.98*2) + (16*14)+ (32*14)= 322.186 g/mol.
Thus 409.0 kg of H₂₀Na₂O₁₄S will have a value which is equivalent to = (409000g)/(322.186 g/mol.)
=1269.453mol of H₂₀Na₂O₁₄S.
But it was stated in the the question that per mole of H₂₀Na₂O₁₄S will transfer 354 kJ heat.
Therefore, 1269.453mol will transfer 1269.453× 354 kJ = 4.49×10⁵ kJ of heat.
Hence, 409.0 kg of sodium sulfate decahydrate will produce
4.49×10⁵ kJ of heat energy.
Chlorofluorocarbons are ?
A. colorless, odorless gases that prevent red blood cells from carrying oxygen to the body
B. man-made chemicals containing chlorine and fluorine that cause
ozone molecules to break down
C. chemicals produced in factories that are used to prevent air
pollution
D. molecules containing chlorine and fluorine that block UV radiation
from reaching the Earth
Chlorofluorocarbons (CFCs) are man-made chemicals containing chlorine and fluorine that cause ozone molecules to break down. Thus, option B is the answer.
Chlorofluorocarbons are non-toxic, synthetic compounds that contain atoms of Chlorine, Fluorine and Carbon. They are commonly used in the manufacture of aerosol sprays and are also used as solvents and refrigerants. CFCs were first introduced in 1928 by General Motors Company for its refrigerators.
While CFCs are very safe to use in most applications and are stable in the lower atmosphere, these chemicals when released to the upper atmosphere can cause significant reactions. CFCs when released into the upper atmosphere can lead to the destruction of the ozone molecules followed by the release of the UV radiation into the atmosphere.
Thus, CFCs are man-made chemicals which cause ozone molecules to break down.
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moles of each product that would form as a result of the decomposition of aspirin
The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).
The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:
\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)
From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.
Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.
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