All categories

2 years ago

How many molecules are in 13.2 g NO2?

Chemistry

1 answer:

DochEvi [55]2 years ago

5 0

Answer:

No. of molecules= mass/molar mass ×avogadro no.

= 13.2/50×6.02×10°23

No. of molecules =1.59×10°23

Explanation:

You might be interested in

Plzzzzzzzzzzzzzz answer fast

vfiekz [6]

Answer:

Welding and computer chips

8 0

2 years ago

Read 2 more answers

PLS HELP ME WILL GIVE BRAIN THINGYYYYY

alexandr1967 [171]

Answer:

C, when the ball lands it will have the least amount potential energy.

Explanation:

here is a picture that should help you.

6 0

3 years ago

What is an evenly distributed, uniform mixture called?

Ivenika [448]

Answer:

The correct answer is Option

B. A homogeneous mixture

Explanation: Mixture is solution which is made of two or more than two substances which are combined only physically not chemically. There are two types of mixture i. e. Homogeneous mixture and heterogeneous mixture. Homogeneous mixture is a mixture in which the substances which are combined are uniform in appearance and heterogeneous mixture is a mixture in which substances are suspended in the solution and easily differentiated.

6 0

3 years ago

A substance whose molecule is monatomic

JulijaS [17]

All of the elements in the periodic table are monoatomic except the 7 elements that are diatomic atoms. These 7 elements are hydrogen, nitrogen, oxygen, chlorine, bromine, iodine and fluorine. Monoatomic substances are those elements that are stable by themselves.

8 0

3 years ago

A 25.0 L tank of nitrogen gas is at 25 oC and 2.05 atm . If the temperature stays at 25 oC and the volume is decreased to 14.5 L

NeTakaya

Answer:

$\boxed {\boxed {\sf P_2 \approx 3.53 \ atm}}$

Explanation:

In this problem, the temperature stays constant. The volume and pressure change, so we use Boyle's Law. This states that the pressure of a gas is inversely proportional to the volume. The formula is:

$P_1V_1=P_2V_2$

Now we can substitute any known values into the formula.

Originally, the gas has a volume of 25.0 liters and a pressure of 2.05 atmospheres.

$25.0 \ L * 2.05 \ atm = P_2V_2$

The volume is decreased to 14.5 liters, but the pressure is unknown.

$25.0 \ L * 2.05 \ atm = P_2 * 14.5 \ L$

Since we are solving for the new pressure, or P₂, we must isolate the variable. It is being multiplied by 14.5 liters and the inverse of multiplication is division. Divide both sides by 14.5 L .

$\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}=\frac{P_2 *14.5 \ L}{14.5 \ L}$