Ask question

Ask question

All categories

3 years ago

14

Phase change is based on the_________, which states that phase change occurs with changing average kinetic energy. a. Law of con

servation of Mass b. Law of definite proportions c. Kinetic Molecular Theory d. law of multiple proportions

1 answer:

AleksAgata [21]3 years ago

8 0

Answer:

d but I'm not sure.............

You might be interested in

PLEASE ANSWER ASAP FOR 50 POINTS (scroll down to see the pictures for the questions)

sladkih [1.3K]

Absorption occurs when photons from incident light hit atoms and molecules and cause them to vibrate. The more an object's molecules move and vibrate, the hotter it becomes. This heat is then emitted from the object as thermal energy.

8 0

2 years ago

Read 2 more answers

If 7.25g of chlorine is reacted with excess hydrogen and produces 7.25 g HCl. What is the percent yield?

lozanna [386]

Answer:

94.61 %

Explanation:

percent yield = (actual yield / theoretical yield) X 100%

The balanced equation for the reaction is:

H2 (g ) + Cl2(g) => 2 HCl (l)

So, the theoretical yield =

7.25g of chlorine X (2mol of Cl / 35.453 g of Cl) X (2mol Cl / 2mol of HCl) X 37.469g of Hcl / 2mol of Hcl = 0.409 x 18.735 = 7.663g of Hcl

Using this theoretical yield and the provided value for actual yield, the percent yield = (actual yield / theoretical yield) X 100%

= (7.25 g / 7.663g) X 100

= 94.61 %

3 0

3 years ago

Which statement accurately describes the charge of the nucleus of an atom? A. The nucleus can be either positively charged or ne

BARSIC [14]

<span>A. The nucleus can be either positively charged or neutral.

The nucleus is located at the center of an atom wherein it contains the protons and the neutrons.</span>

3 0

3 years ago

Read 2 more answers

There is about 1.0 g of calcium as Ca2+ in 1.0 L of milk. What is the molarity of Ca2+ in milk?

meriva

Explanation:

It is known that molarity is the number of moles present in a liter of solution.

Molarity = $\frac{\text{no. of moles}}{volume}$

Also, number of moles equal mass divided by molar mass. And, molar mass of calcium is 40.07 g/mol.

No. of moles = $\frac{mass}{\text{molar mass}}$

= $\frac{1.0 g}{40.07 g/mol}$

= 0.025 mol

Therefore, calculate the molarity as follows.

Molarity = $\frac{\text{no. of moles}}{volume}$

= $\frac{0.025 mol}{1.0 L}$

= 0.025 M

Thus, we can conclude that molarity of $Ca^{2+}$ in milk is 0.025 M.

7 0

3 years ago

When the volume and concentration of a base that completely neutralizes an acid is known, you can determine the concentration of

Stella [2.4K]

Answer:

2 1

Explanation:

5 0

3 years ago

Read 2 more answers