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3 years ago

Kinetic energy and gravitational potential energy are both forms of which type

Chemistry

1 answer:

scoundrel [369]3 years ago

8 0

Answer:

C. Potential energy

Explanation:

Kinetic energy and gravitational potential energy are both forms of potential energy. Potential energy is stored energy, when an object is not in motion it has stored energy. When an object is an motion it has kinetic energy. An object posses gravitational potential energy when it is above or below the zero height.

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When OH- and H+ ions are brought together, they quickly combine to form water molecules.

zlopas [31]

When OH- and H+ ions are brought together, they quickly combine to form water molecules.

a. True
b. False

The statement “When OH- and H+ ions are brought together, they quickly combine to form water molecules” is true. The answer is letter A.

8 0

3 years ago

Read 2 more answers

A certain substance X has a normal freezing point of −3.1°C and a molal freezing point depression constant =Kf·6.23°C·kgmol−1. C

muminat

Answer:

Freezing T° of solution = - 7.35 °C

Explanation:

This is about the freezing point depression, a colligative property which depends on solute.

The formula is: Freezing T° pure solvent - Freezing T° solution = m . Kf . i

Freezing T° of pure solvent is -3.1°C

At this case, i = 1. As an organic compound the urea does not ionize.

We determine the molality (mol/kg of solvent)

We convert mass to moles:

12.3 g . 1mol / 60.06 g = 0.205 moles

0.205 mol / 0.3 kg = 0.682 mol/kg

We replace data in the formula:

-3.1°C - Freezing T° of solution = 0.682 mol/kg . 6.23 kg°C/mol . 1

Freezing T° of solution = 0.682 mol/kg . 6.23 kg°C/mol . 1 + 3.1°C

Freezing T° of solution = - 7.35 °C

6 0

4 years ago

A solution of iron(III) chlorate was poured into a lithium phosphate solution. Would you expect a precipitate to form if 354.0 m

Artist 52 [7]

Answer:

K. Yes, because Qsp > Ksp for iron(III) phosphate

Explanation:

Lithium chlorate is very soluble in water, that means has a big ksp.

Iron (III) phosphate has a ksp of 1.3x10⁻²²

Ksp formula of iron (III) phospate is:

FePO₄(s) ⇄ Fe³⁺(aq) + PO³⁻(aq)

Ksp = [Fe³⁺] [PO₄³⁻] = 1.3x10⁻²²

Molar concentration of Fe³⁺ and PO₄³⁻ is:

[Fe³⁺] = 0.340L ₓ (2.52x10⁻⁹mol / L) ÷ (0.354L + 0.520L) = 9.8x10⁻¹⁰M

[PO₄³⁻] = 0.520L ₓ (4.65x10⁻¹¹mol / L) ÷ (0.354L + 0.520L) = 2.78x10⁻¹¹M

Replacing in Ksp formula:

Qsp = [9.8x10⁻¹⁰] [2.78x10⁻¹¹M] = 2.72x10⁻²⁰

As Qsp > Kps, the equlibrium will shift to the right decreasing the ions concentrations producing FePO₄(s), a precipitate

The ions decreases its concentration until Q = Kps

Thus, right answer is:

K. Yes, because Qsp > Ksp for iron(III) phosphate

6 0

3 years ago

Which of the following is the definition of motion?

Irina-Kira [14]

Answer:

Explanation:

A change of position over time.

B is a vector and C is a distance.

6 0

3 years ago

Explain the stages of mitosis in your own words

olchik [2.2K]

Answer:

Mitosis is an intersting process where a single cell divides into two identical daughter cells. During mitosis one cell divides once to form two identical cells. The major purpose of mitosis is for growth and to replace worn out and dysfunctional cells.

Explanation:

5 0

3 years ago