CHEMISTRY HIGH SCHOOL

The process of a material going through a change of state from a gas to a liquid is called _____. melting freezing condensation vaporization

Answers

Answer 1

Answer: Condensation is the change in state of matter from gas to liquid.

Answer 2

Answer:

The process of a material going through a change of state from a gas to a liquid is called _____.

condensation

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Pierce conducts an experiment in which waves collide in a way that the energy increases, which means that has occurred

Answers

Answer:

It means the waves collides and constructive interference occurred.

Explanation:

If the two waves coming from the opposite direction collide with each other, there are two way of their interference.

Constructive interference: An interference which results in the increase in energy. And it is when crust of a wave comes on the crust of second wave.
Destructive interference: An interference which results in decrease in energy of the resulting wave and colliding waves cancel the result of each other.

Hence in experiment there will be constructive interference.

Answer:

Explanation:

I took the test!

Destructive forces can include floods, landslides, tornadoes, tsunamis, wildfires andvolcanoes.
True
False

Answers

Answer:

True

Explanation:

Answer:

answer is true

What is determined by the motion of and distance between particles of a sample of matter?

Answers

heat is the speed of the particles and defines the higher speed at the higher heat temperature. the temperature of a substance also determines the state of matter a substance is when it has a higher heat temperature at lower densities.

The half-life of radioactive substance is 2.5 minutes. what fraction of the origional radioactive remains after 10 mins

Answers

The answer is 1/16.

Half-life is the time required for the amount of a sample to half its value.
To calculate this, we will use the following formulas:
1. $(1/2)^(n) = x$ ,
where:
n - a number of half-lives
x - a remained fraction of a sample

2. $t_(1/2) = (t)/(n)$
where:
$t_(1/2)$ - half-life
t - total time elapsed
n - a number of half-lives

So, we know:
t = 10 min
$t_(1/2)$ = 2.5 min

We need:
n = ?
x = ?

We could first use the second equation to calculate n:
If:
$t_(1/2) = (t)/(n)$ ,
Then:
$n = (t)/( t_(1/2) )$
⇒ $n = (10 min)/(2.5 min)$
⇒ $n=4$

Now we can use the first equation to calculate the remained fraction of the sample.
$(1/2)^(n) = x$
⇒ $x=(1/2)^4$
⇒ $x= (1)/(16)$

What type of intermolecular force is CO3

Answers

Answer:

uututtuuturutururyrurrururuur

The density of an elemental gas is 1.7824 g/l at stp. what is the molar mass of the element. what is the element?

Answers

Answer: The molar mass of the element is 40 g/mol and element is Calcium.

Explanation:

At STP:

1 mole of a gas contains 22.4 L of volume

Molar mass is defined as the mass of 1 mole of a substance.

To calculate mass of of the substance, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Volume of gas = 22.4 L

Density of gas = 1.7824 g/L

Putting values in above equation, we get:

$1.7824g/L=\frac{\text{Mass of gas}}{22.4L}\n\n\text{Mass of gas}=(1.7824g/L* 22.4L)=39.9g\approx 40g$

The element having molar mass 40 g is Calcium.

Hence, the molar mass of the element is 40 g/mol and element is Calcium.

At STP 1 mole of gas occupies 22.4L. So you just multiply 1.7824g/L by 22.4L and the Liters cancel out. So the final answer is 39.92 and element Argon is closest to this mass so Argon is the element.

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