Copper(II) sulfate is an example of a substance that dissolves in water. Copper(II) sulfate is an ionic compound with the chemical formula CuSO4 and when it is added to water it dissociates into Cu2+ and SO42− ions. Students used both copper sulfate crystals and copper sulfate powder in this experiment on the rate of dissolving. Choose one statement that represents a valid conclusion based on the student data?


A) The smaller the solute particles the more energy they have. Increased energy results in shorted dissolving time.


B) A given quantity of solute dissolves faster when it is ground into small particles because more surface area is exposed.


C) As the water temperature increased, the copper sulfate crystals dissolved faster but there was little change for the powdered form.


D) Agitation of the powder allows fresh solvent molecules to continually be in contact with the solute

Answer:

have g8igcicg9ccgco

Explanation:

gcohogxzrxog floor. gi gi gi gi. r. uvgi7rz. g yde6ifkg. gg g goog oh g of ifz8fd8dti

The empirical formula of the hydrocarbon is C₁H₃. Assuming that all carbon is converted to CO₂ and all hydrogen to water when the hydrocarbon combusts.

The empirical formula of a hydrocarbon can be determined by analyzing the amounts of carbon dioxide and water produced during combustion. Here are the steps to find the empirical formula:

1. Determine the amount of carbon in the CO₂ produced: 0.4931 g CO₂ x (12 g C / 44 g CO₂) = 0.1345 g C
2. Determine the amount of hydrogen in the water produced: 0.2691 g H₂O x (2 g H / 18 g H₂O) = 0.0299 g H
3. Divide the amounts of carbon and hydrogen by their respective atomic masses to find the moles of each element: 0.1345 g C / 12 g/mol = 0.0112 mol C and 0.0299 g H / 1 g/mol = 0.0299 mol H
4. Divide the moles of each element by the smallest value to find the ratio: 0.0112 mol C / 0.0112 = 1 and 0.0299 mol H / 0.0112 = 2.67
5. Round the ratio to the nearest whole number to find the empirical formula: C₁H₃

Therefore, the empirical formula of the hydrocarbon is C₁H₃

learn more about empirical formula

https://brainly.com/question/1439914

#SPJ11

a) To solve for the k value in the equation T(t) = 70 + 142ekt, we can use the given information that the coffee temperature at 10 minutes was 110°F.

Substituting t = 10 and T(t) = 110 into the equation, we have:110 = 70 + 142ek(10). Subtracting 70 from both sides, we get: 40 = 142ek(10). Dividing both sides by 142, we have: ek(10) = 40/142. Taking the natural logarithm (ln) of both sides, we get: ln(ek(10)) = ln(40/142). Simplifying, we have: k(10) = ln(40/142). Dividing both sides by 10, we get: k = ln(40/142) / 10. Using a calculator, we find that k ≈ -0.0131. b) To find T(t) at 19.5 minutes, we can substitute t = 19.5 into the equation T(t) = 70 + 142ekt: T(19.5) = 70 + 142e(-0.0131)(19.5) Using a calculator, we can evaluate the expression to find T(19.5) ≈ 99.6°F. a) The decay of Lidocaine can be modeled using the equation L(t) = aekt. Given that the half-life of Lidocaine is about 1.5 hours, we can use this information to solve for the k value. Using the half-life formula, we know that: t1/2 = (ln 2) / k. Substituting t1/2 = 1.5 hours, we have: 1.5 = (ln 2) / k. Solving for k, we get: k = (ln 2) / 1.5. Using a calculator, we find that k ≈ 0.4621. b) The exponential model for Lidocaine decay is given by : L(t) = aekt. c) To find how long it will take for the amount of Lidocaine to reduce to 20 mg, we can substitute L(t) = 20 and solve for t. 20 = 200e0.4621t. Dividing both sides by 200, we have: 0.1 = e0.4621t. Taking the natural logarithm (ln) of both sides, we get: ln(0.1) = 0.4621t. Simplifying, we have: t = ln(0.1) / 0.4621. Using a calculator, we find that t ≈ 2.7 hours. Rounded to the tenths, it will take approximately 2.7 hours for the amount of Lidocaine to reduce to 20 mg.

To learn more about temperature, https://brainly.com/question/16999043

#SPJ11

The thing that will happen to the underwater plants is option D: Existing plants will grow larger and new plants will grow.

The existing plants in the aquarium were limited in their growth by the availability of light. By increasing the amount of sunlight the aquarium receives, the plants will now have access to more light energy, which is necessary for photosynthesis.

Therefore,  This increased light energy will allow the existing plants to grow larger. Additionally, the increased light will also provide the necessary energy for new plants to grow, resulting in an increase in the overall number of plants in the aquarium.

Learn more about aquarium from

https://brainly.com/question/28889858

#SPJ1

Answer:

A not

B yes

C yes

D yes

Explanation:

A 2C 6H but 10O and 7O so no

B 3C 6O 2Fe on each side  so yes

C 4H 1S 6O 2Na so yes

D 2Ag 2Cl 1Ca 2N 6O so yes

Answer:

Active transport is an active process. Thus, it requires energy. Whereas facilitated diffusion is a passive process and does not require energy.

Explanation:

ugh

The density of H2O2 gas at 15 °C and 160. 20 kPa is given by formula PV=nRT is 236.40 g/L.

Density is defined as the mass per unit volume of a material under certain temperature and pressure conditions. The gas's density is equal to its mass divided by its volume. If the density of the gas is known, the molar mass of the material may be calculated. Temperature and pressure affect density.

we have,

Temperature = 15 = 15 + 273 = 288 K

And pressure = 160.2 KPa.

PV = nRT

PV = m/mwt x RT

pxmwt/RT = m/V

we know m/v = density

density = 160.20 x 34 / 0.08 x 288

d = 236.40 g/L

Therefore, density of H2O2 gas is 236.40 g/L.

Learn more about Density:

https://brainly.com/question/20384033

#SPJ4

1. The half-life of the element is 22 years

2. The time taken for 308 g of the sample to decay to 4.8125 g is 132 years

Half-life is simply defined as the time taken for half of a material to decay.

From the diagram, the time for 22.5 g is 22 years.

Thus, the half-life of the element is 22 years

2ⁿ = N₀ / N

2ⁿ = 308 / 4.8125

2ⁿ = 64

2ⁿ = 2⁶

n = 6

t = n × t½

t = 6 × 22

t = 132 years

See attached photo for diagram

Learn more about half life:

https://brainly.com/question/26374513

Answer:

The question is very complicated. In the liquid you should be able to see the solid. Anyway here is your answer. Hope it helps!

Explanation:

Mixing of Substances:

Many types of solids will dissolve into liquids under the right conditions. Certain factors will speed up the process of dissolving, including stirring the substance and heating it.

Answer and Explanation:

When a solid dissolves into a liquid, a solution is made. This happens because the solid is made up of particles that will come apart, or dissociate, in the liquid. It will appear that the solid has disappeared into the liquid, when in fact, its particles are still there. For example, salt (NaCl) easily dissolves in water. From a chemistry standpoint, it does so because the salt molecules separate into their charged ions once in the water. The ions become attracted to the slightly charged water molecules, making them stay in the solution. This process can be reversed. If the water is evaporated, the salt ions will come back together to form NaCl molecules.

5/16 = 0.313

\(\sqrt{1/16}\) = 0.25

0.38(10) = 3.8

\(\sqrt{0.09}\) = 0.3

The carboxyl group (COOH) contains two oxygen atoms.

The carboxyl group is a functional group commonly found in organic molecules, particularly in carboxylic acids. It consists of a carbonyl group (C=O) and a hydroxyl group (OH) bonded to the same carbon atom. The general formula for a carboxyl group is R-COOH, where R represents a carbon chain or other atoms attached to the carboxyl group.

In the carboxyl group, the oxygen atom is part of both the carbonyl group and the hydroxyl group. The carbonyl group consists of a carbon atom double-bonded to an oxygen atom (C=O), and the hydroxyl group is a single-bonded oxygen atom bonded to a hydrogen atom (OH). Therefore, there are two oxygen atoms in the carboxyl group: one in the carbonyl group and one in the hydroxyl group.

This arrangement of oxygen atoms in the carboxyl group is crucial for the acidic properties of carboxylic acids and plays a significant role in their chemical reactivity and bonding with other molecules.

learn more about carboxyl group here:

https://brainly.com/question/31948221

#SPJ11

Answer:

Tissue

Explanation:

We are not talking about cells, organs, or the organism as a whole

Hope this helps!

pls mark brainliest if correct:)

Answer:

The relative atomic mass of the metal is  207.2 u

Explanation:

Metal chromate

Given that;

1) The mass of fluorine is 14.96% of the metal fluoride

2) 2 Chromium are connected to the metal when the metal chromate, CrO²⁻, is formed

We have;

Number of ions available in the metal =  Cr₂O₇²⁻ = +2 ionic

Molar mass of fluorine = 18.998 g/mole

Ionization of fluorine = -1

Number of moles of fluorine required per metal +2 ion= 2 moles

3) Number of moles of fluorine per mole of compound of the metal fluoride = 2 × moles

Mass of fluorine per mole of compound = 2 × 18.998 = 37.996 grams

Percentage by mass of fluorine = 14.96%

Fluoride

Let the mass of the compound = X

Therefore;

14.96% of X = 37.996 grams

X = 37.996/(0.1496) = 253.984 grams

Therefore the mass of the metal in the compound = 253.984 - 37.996 = Molar mass 215.99 grams

Given that the metal forms a chromate with 2 chromium atoms and a mass of 215.99 grams, the likely candidate is lead, Pb with a molar mass of 207.2 grams and a chromate of Pb(CrO₄)₂.

The fluoride, lead fluoride, F₂

The relative atomic mass of lead is 207.2 u

Option (C) is correct. Carbon monoxide id poisoning because of the Hyperbaric oxygen chamber to increase PO2 and clear CO from the body involves in the Hyperbaric oxygen therapy.

Carbon monoxide is poisoning because of the hyperbaric oxygen therapy. Hyperbaric oxygen therapy is defined as therapy that involves breathing pure oxygen in a pressurized environment. This therapy is a well-established treatment for decompression sickness, a potential risk of scuba diving. some conditions treated with hyperbaric oxygen therapy includes serious infections, bubbles of air in blood vessels, wounds that may not heal because of diabetes or radiation injury. HBOT increases the amount of oxygen your blood can carry. With repeated treatments with the therapy the temporary extra high oxygen levels encourage normal tissue oxygen levels even after the therapy is completed.

To learn more about Hyperbaric oxygen therapy

https://brainly.com/question/28385665

#SPJ4

The complete question is,

which of the following is an appropriate response to carbon monoxide (co) poisoning?

A. hyperventilation to exhale co from the body

B. immediate application of bicarbonate ions to facilitate removal of co   from hb

C. hyperbaric oxygen chamber to increase po2 and clear co from the body

D. slow breathing into a paper bag

Answer:

The answer is

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

density of mercury = 13.6 g/cm³

First we must convert the volume from mL to cm³

if 1 mL = 1 cm³

Then 8.20 mL = 8.20 cm³

volume = 8.20 cm³

The mass of mercury is

mass = 13.6 × 8.2

We have the final answer as

Hope this helps you

The molecular formula for a polypeptide consisting of five lysine molecules will be C₃₀H₅₄N₁₀O₁₀

Amino acids are the organic compounds which contains both amino as well as carboxylic acid functional groups. Although hundreds of amino acids will exist in nature, by far the most important are the alpha-amino acids, which comprise proteins.

A polypeptide is a continuous, unbranched chain of the amino acids joined by peptide bonds. To generate an amide, the peptide bond will connects the carboxyl group of one amino acid to the amine group of the next amino acid.

The molecular formula of the amino acid lysine is C₆H₁₄N₂O₂. If a polypeptide consists of five lysine molecules, then the molecular formula of the polypeptide would be:

5(C₆H₁₄N₂O₂) = C₃₀H₅₄N₁₀O₁₀

So, the molecular formula for a polypeptide consisting of five lysine molecules would be C₃₀H₅₄N₁₀O₁₀.

To know more polypeptide about here

https://brainly.com/question/14835777

#SPJ4

Altitude has a great affect on the freezing, melting, and boiling points of water.

At higher altitude, the atmospheric pressure decreases which means that the water heat up more quickly as compared to sea level where atmospheric pressure is higher. At higher altitude the melting point decreases because the atmospheric pressure is lower at higher altitude.

At high altitude the environment is cold so the water freezes more quickly with the increase of altitude so we can conclude that altitude has a direct impact on the freezing, melting, and boiling points of water.

Learn more: https://brainly.com/question/18589631

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.

To know more about conversion,

brainly.com/question/17604357

#SPJ1

Correct question:

Convert 0.057km to m

a. 0.000057m

b. 0.57m

c. 57m

d. 570m

The statement that correctly describes one of the bulk elements necessary for life is: 3. Carbon (C) has 4 valence electrons and is likely to form covalent bonds.

Carbon is a crucial element for life as it forms the backbone of organic molecules, which are the building blocks of living organisms. In its atomic structure, carbon has six electrons, with four of them located in its outermost energy level, known as the valence electrons. These valence electrons determine how carbon interacts with other atoms to form chemical bonds.

Carbon is unique in that it can form strong covalent bonds with other carbon atoms, creating long chains or rings, which serve as the basis for complex organic molecules. The four valence electrons of carbon allow it to share electrons with other atoms, leading to the formation of stable covalent bonds. These covalent bonds involve the sharing of electron pairs between carbon and other atoms, such as hydrogen, oxygen, nitrogen, and many others.

This ability of carbon to form covalent bonds with a variety of elements is the foundation of organic chemistry, which is the chemistry of life. Carbon-based compounds, also known as organic compounds, include essential molecules like carbohydrates, lipids, proteins, and nucleic acids, which are vital for biological processes.

Know more about Covalent Bonds here:

https://brainly.com/question/19382448

#SPJ11

The entire number of valence electrons should be known. Step 2: Outline the molecule's skeletal structure. Step 3: Form each bond in the skeletal structure using two valence electrons Lewis.

The element symbol for an atom is covered in dots that represent the electrons in its valence shell, which is known as the Lewis dot structure or electron-dot symbol. A single dot represents the unpaired electron in the valence shell, whereas a pair of dots represents the paired electrons.

The number of valence e- atoms that each atom contributes to the molecule is counted when designing Lewis dot structures.

With the exception of H, which is only encircled by two electrons, place electron pairs around each atom so that there are eight electrons around each atom (octet rule).

To learn more about Lewis please click on below link

https://brainly.com/question/15570523

#SPJ4

The mass of iron which is needed to react with 16.0 grams of sulphur is 28 grams

How to balanced the given equation?

The balanced chemical equation for the reaction between iron and sulfur  to form iron sulfide is:

8 Fe + S₈ → 8 FeS

From the balanced chemical equation, we can see that 8 moles of Fe react with 1 mole of S₈ to form 8 moles of FeS.

To determine the mass of iron required to react with 16 grams of sulfur, we first need to calculate the number of moles of sulfur present in 16 grams of S.

The molar mass of S is 32.06 g/mol (the atomic mass of S is 32.06). Therefore, the number of moles of S in 16 grams is:

n(S) = m(S) / M(S) = 16 g / 32.06 g/mol = 0.499 mol

The molar mass of 8 moles of iron will be 448 grams

∴56 × 8 = 448 grams

Similarly the molar mass of S₈ will be 256 grams

∴32 × 8 = 256 grams

Therefore,

256gram of Sulphur needs 448 gram of Iron

So 16 gram of sulphur will  ?

cross multiply

The mass of Iron needed =( 16 × 448) ÷256

= 7168 ÷ 256

Hence by solving the above equation we can find the mass of iron which is 28 grams

To know more about chemical reaction visit:- https://brainly.com/question/11231920

#SPJ1

MgO > CaBr2 > LiF > CsBr > Srs (decreasing lattice energy)

To rank the ionic compounds in decreasing lattice energy, we need to consider the charges and sizes of the ions involved. Generally, higher charges and smaller ion sizes lead to higher lattice energies. Based on this information, here is the ranking in decreasing lattice energy:

MgO

CaBr2

LiF

CsBr

Srs

Explanation:

MgO has a 2+ charge for Mg ions and a 2- charge for O ions. Both ions are relatively small in size, resulting in a strong electrostatic attraction and high lattice energy.

CaBr2 has a 2+ charge for Ca ions and a 1- charge for Br ions. Although the charge is the same as MgO, the larger size of the Br ions compared to O ions reduces the lattice energy slightly.

LiF has a 1+ charge for Li ions and a 1- charge for F ions. Both ions are relatively small, leading to a high lattice energy.

CsBr has a 1+ charge for Cs ions and a 1- charge for Br ions. Cs ions are larger than Li ions, which decreases the lattice energy.

Srs has a 2+ charge for Sr ions and a 1- charge for S ions. The larger size of S ions compared to O ions and the smaller charge for Sr ions result in the lowest lattice energy among the given compounds.

Please note that this ranking is a general approximation based on the charges and sizes of the ions. The lattice energy also depends on other factors, such as the arrangement of ions in the crystal lattice

Learn more about science

brainly.com/question/935949

#SPJ11

The ranking of the ionic compounds in decreasing lattice energy is as follows: MgO > LiF > Srs > CaBr2 > CsBr.

Lattice energy is a measure of the energy released when ions come together to form a solid lattice structure. It is influenced by factors such as the charges and sizes of the ions involved. In this ranking, MgO has the highest lattice energy.

This is because both magnesium (Mg2+) and oxygen (O2-) ions have high charges, and their sizes are relatively small. LiF follows next, with a slightly lower lattice energy due to the smaller charges on lithium (Li+) and fluorine (F-) ions.

Moving down the list, Srs has a higher lattice energy than CaBr2 due to the larger charges on strontium (Srs2+) and bromide (Br-) ions. Finally, CsBr has the lowest lattice energy since it involves larger ions with lower charges, cesium (Cs+) and bromide (Br-) ions.

Understanding the concept of lattice energy helps us comprehend the stability and properties of ionic compounds. The factors influencing lattice energy, such as ion charge and size, to gain a deeper understanding of their behavior.

Learn more about Lattice energy

brainly.com/question/29735933

#SPJ11

Answer:

Here:

Explanation:

A high pressure system means that particles will be close together in confined space and a low pressure system means there will be less particles close together

OR

A high pressure system means that cool air is sinking whereas a low pressure system is where cool air is rising. A low pressure system has lower pressure at its center than the areas around it.

The mass of the corresponding sodium salt of the conjugate base needed to make a buffer with a pH of 2.08.

To determine the mass of the corresponding sodium salt of the conjugate base needed to make a buffer with a pH of 2.08, you can follow these steps:

1. Identify the given information:
  - Initial volume of acid solution: 500 mL
  - Initial concentration of acid solution: 0.10 M
  - Desired pH: 2.08

2. Use the Henderson-Hasselbalch equation:
  pH = pKa + log ([conjugate base]/[acid])

3. Assuming the acid is a weak monoprotic acid (HA) and its conjugate base is A-, determine the pKa:
  pKa = pH - log ([A-]/[HA])

4. Calculate the ratio of [A-] to [HA]:
  [A-]/[HA] = 10^(pH-pKa)

5. Calculate the moles of HA in the 500 mL of 0.10 M solution:
  moles of HA = (volume x concentration) = 500 mL x 0.10 mol/L = 0.050 mol

6. Calculate the moles of A- needed:
  moles of A- = moles of HA x ([A-]/[HA]) ratio

7. Determine the molar mass of the sodium salt of the conjugate base (A-) using the molecular formula.

8. Calculate the mass of the sodium salt of the conjugate base:
  mass = moles of A- x molar mass of A-

By following these steps, you will be able to determine the mass of the corresponding sodium salt of the conjugate base needed to make a buffer with a pH of 2.08.

To know more about conjugate base refer here: https://brainly.com/question/30086613#

#SPJ11

To calculate the moles of oxygen in the reaction vessel, we will use the ideal gas law, which states:

PV = nRT

where P is the pressure in atmospheres, V is the volume in liters, n is the number of moles, R is the gas constant (0.0821 L·atm/mol·K), and T is the temperature in Kelvin.

Is the temperature in Kelvin. First, we need to convert the temperature from Celsius to Kelvin:

T = 24.5oC + 273.15 = 297.65 K

Now we can plug in the values we know:

28.3 atm * 0.193 L = n * 0.0821 L·atm/mol·K * 297.65 K

Simplifying this equation, we get:

n = (28.3 atm * 0.193 L) / (0.0821 L·atm/mol·K * 297.65 K)

n = 0.0228 mol

Therefore, there are 0.0228 moles of oxygen in the reaction vessel.

Answer:

The answer is

Explanation:

The percentage error of a certain measurement can be found by using the formula

\(P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ \)

From the question

actual measurement = 46.37 g

error = 47.25 - 46.37 = 0.88

The percentage error of the measurement is

\(P(\%) = \frac{0.88}{46.37} \times 100 \\ = 1.89777873...\)

We have the final answer as

Hope this helps you

The percent ionization in the 0.56 M aqueous solution of phenol (C6H5OH) is 3.98 x 10^-5 %.

Phenol (C6H5OH) is a weak acid that dissociates partially in aqueous solution. Its ionization reaction can be represented as:

C6H5OH (aq) + H2O (l) ⇌ C6H5O- (aq) + H3O+ (aq)

The equilibrium constant expression for this reaction is:

Ka = [C6H5O-][H3O+] / [C6H5OH]

We can use the given pH and the equilibrium constant expression to calculate the concentration of C6H5O- and H3O+ in the solution, and then use the percent ionization equation to calculate the percent ionization:

pH = pKa + log([C6H5O-]/[C6H5OH])

5.07 = -log(1.3 x 10^-10) + log([C6H5O-]/[C6H5OH])

5.07 + 10 = log([C6H5O-]/[C6H5OH])

[C6H5O-]/[C6H5OH] = 3.98 x 10^-6

The initial concentration of phenol in the solution is 0.56 M. The concentration of C6H5O- can be calculated using the ratio above:

[C6H5O-] = [C6H5OH] x 3.98 x 10^-6

[C6H5O-] = 0.56 M x 3.98 x 10^-6

[C6H5O-] = 2.23 x 10^-9 M

The concentration of H3O+ can be calculated using the equilibrium constant expression:

Ka = [C6H5O-][H3O+] / [C6H5OH]

1.3 x 10^-10 = (2.23 x 10^-9 M)([H3O+]) / (0.56 M)

[H3O+] = 2.58 x 10^-12 M

The percent ionization can be calculated as:

% ionization = ([C6H5O-]/[C6H5OH]) x 100%

% ionization = (2.23 x 10^-9 M / 0.56 M) x 100%

% ionization = 3.98 x 10^-7 x 100%

% ionization = 3.98 x 10^-5 %

Therefore, the percent ionization in the 0.56 M aqueous solution of phenol (C6H5OH) is 3.98 x 10^-5 %.

For more similar questions on  solubility product

https://brainly.com/question/1419865

#SPJ11

Answer:

2FeO + C ---> 2Fe +CO2

Explanation: