3 years ago

Is ice melting in a drink a chemical change?

1 answer:

6 0

Nope, it's a physical change. When ice melts it changes into liquid water, it's still water. Changes in which no new substances are formed are physical changes, hence this is a physical change.

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How many moles of CaCl₂ are required to produce 45.97 grams of NaCl?

marin [14]

Answer is 0.7866187543

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2 years ago

A bond between a nonmetal and a nonmetal is called a(n)

Pani-rosa [81]

Answer:

answer: B

Explanation:

becaucse it is B

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2 years ago

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Calculate the volume of a sample of iron that has a density of 6.8 g/mL and a mass of 6780 mg.

Veronika [31]

Answer:

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2 years ago

Energy removal is illustrated in. A. Changing water ice to waterB. Changing water to steamC. Boiling of gasolineD. Evaporation o

Kryger [21]

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1 year ago

Using standard free energy of formation values given in the introduction, calculate the equilibrium constant kp of the reaction

WINSTONCH [101]

d G = 2 (dG NOCl) - 2 (dG NO)

= 2 * 66.08 - 2 * 87.6 = -43.04 kJ /mol

dG = - 2.303 RT log K

-43.04 = - 2.303 RT log K

7.54 = log K

K = 3.42 * 10^7

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Kp = (3.42 * 10^7) (8.314 * 298)^-1

Kp = 1.31 * 10^4

6 0

3 years ago