Chemistry High School

APE X What is happening to particles of matter while a change of state is taking place?
a. They are staying at the same speed
b. They are multiplying in number
c. They are slowing down
d. They are speeding up

Answers

Answer 1

Answer:

a. They are staying at the same speed

Explanation:

IF CORRECT PLSPLSPLS GIVE BRAINLIEST WOULD APPRECIATE :)

Answer 2

Answer:

a. They are staying at the same speed

Related Questions

What is the charge of the nucleus ? Why ?

Answers

Answer:

A nucleus is a positive charge

Explanation:

A nucleus is made up of protons and neutrons. Protons have a positive charge and neutrons have a neutral charge.

What is the density of an object with a mass of 125 g and a volume of 150 mL ?

Answers

Answer:

13

Explanation:

234567877


Which of the following compounds is least soluble in water?
1) Copper (II) Chloride
2) Aluminum Acetate
3) Iron (III) hydroxide
4) Potassium Sulfate

Answers

Answer:

3) iron (iii) hydroxide

Explanation:

Carbon Monoxide is a toxic gas that is colorless and tasteless. How many moles of CO are in 1 L of the gas at STP?

28 moles

0.045 moles

22.4 moles

0.224 moles

Answers

Answer:

0.045 moles

Explanation:

Given data:

Moles of CO = ?

Volume of gas = 1 L

Temperature and pressure = standard

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

n = PV/RT

n = 1 atm× 1L / 0.0821 atm.L/mol.K × 273 K

n = 1 atm.L / 22.41 atm.L/mol

n = 0.045 mol

In which highlighted section of the periodic table in the diagram provided above are the elements whose atoms have 1 valence electron located?

A) a
B) b
C) c
D) d

Answers

Answer:

B.

Explanation:

The prefix "semi-" means "partly". Based on your knowledge of the properties of elements, which kind of element is most likely used to make semiconductors?

liquids
metalloids
metals
nonmetals

Answers

Answer:

metalloids

Explanation:

The kind of element most likely used to make semiconductors are the metalloids.

These elements have properties between those of metals and non-metals in that they are not truly metals and are partly non-metals.

Under certain conditions they show features of metals or non - metals. The class of these elements are the metalloids. They are used to make semiconductors which are major components of electronics.

Select the correct answer from each drop-down menu.

Researchers stationed at different areas on a mountain and in a tunnel midway through the mountain boiled water at the same time. Even though the water at every station was at the same temperature, the pot at the top of the mountain started boiling before the others. Why?

Water boils when the vapor pressure is
the atmospheric pressure. The atmospheric pressure
at the top of the mountain.

Answers

Water boils when the vapour pressure is least the atmospheric pressure.

The atmospheric pressure is equal at the top of the mountain.

What is atmospheric pressure?

The air around you has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth.

As we go up in altitude the air pressure becomes less. When the pressure decreases, it takes less energy to get the water molecules to escape the surface. So the temperature is less than it would be at sea level.

Air pressure is higher or greater at the bottom of a mountain. This is because the height of the air above that level is thicker than at the top.

Pressure is given by the equation, P=rho*g*h, where rho is the air density, g is the gravity value and h is the thickness of the air layer on top of the level where we are considering the pressure.

Therefore, as we can see, at the bottom of the mountain, the thickness h of air is greater, and so is the pressure.

Hence, water boils when the vapour pressure is least the atmospheric pressure and the atmospheric pressure is equal at the top of the mountain.

Learn more about the atmospheric pressure here:

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Help please I need it!

Answers

I think it’s V snowing

What is chemical structure about?

Answers

Answer:

chemical structure determines the molecular geometry of ca compound by prtraying the arrangement of atoms and chemical bonds in the molecule..

Explanation:

hope this helps any <3

USE LETTERS FOR ANSWERS, NO NEED TO EXPLAIN
a) Substitute symbols and formulas for words.
b) Predict the products. If no reaction occurs, write “NR” after the --> sign. c) Include abbreviations for the physical state.
d) Write out and balance the equation.

6. Mercury is poured into an aqueous solution of zinc nitrate.

7. Solutions of potassium iodide and lead (II) nitrate are mixed. The resulting lead compound is a precipitate.


thank you! :)

Answers

Answer:

Ok:

Explanation:

6a) [tex]Hg + Zn(NO_3)_2\\[/tex]

b) NR

c) [tex]Hg_{(l)} + Zn(NO_3)_2 {(aq)}=> NR[/tex]

d) Welp, no reaction so i don't know.

7a) [tex]KI + Pb(NO_3)_2[/tex]

b) [tex]PbI_2 + KNO_3[/tex]

c) All are aqeuous except for PbI2 which is solid

d) [tex]2KI _{(aq)}+ Pb(NO_3)_2_{(aq)} => PbI_2_{(s)} + 2KNO_3_{(aq)}[/tex]

Check if that is ok or if my work has any issues :).

what water has 97% of water

Answers

Answer:

ocean

Explanation:

because its easy

The answer would be Ocean

What is the percent composition of Phosphorus in Li3PO3

Answers

Answer:

you will get 17.983 g of lithium for every 100 g of lithium phosphate.

Explanation:

69.7%  is the percent by mass of Lithium in  Li[tex]_3[/tex]PO[tex]_3[/tex]. A percent is obtained by multiplying the result by 100.

One approach to show the concentration for an element within a compound or component in a combination is as a mass percentage. The mass percentage is computed by dividing the total weight of the combination by the mass of each component and multiplying the result by 100%. The mass percent is calculated by dividing the mass that contains the compound and solute by the mass for the element or solute.

99.795g/mol = molar mass of  Li[tex]_3[/tex]PO[tex]_3[/tex]

6.94g/mol = molar mass of Li

mass percentage of Li=(molar mass of Li/molar mass of Li[tex]_3[/tex]PO[tex]_3[/tex])×  100

=(6.94/99.7)×  100

=69.7%

To know more about mass percentage, here:

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The photo shows wires made of pure copper, an element
What would the smallest piece of copper be?
A. Copper atom
B. Mixture of different kinds of metallic elements
C. Copper molecule
D. Compound containing two or more elements

Answers

Answer:

B

Explanation:

I hope its right. I'm pretty sure.

Answer:

Explanation:

Copper Atom

If you discover a new element, how would you know where it should go on the periodic table

Answers

Answer:

the atomic number

Explanation:

it would be in the upper corner

If something is up higher it will have ________________ potential energy.


the same


more


less

Answers

Answer:

More

Explanation:

Give two limitations of law of Constant Composition​

Answers

Answer:

1.The law does not hold true if the different isotopes of the element are involved in making chemical compound.

2.The law is not applicable when elements combine in the same ratio but different compounds are formed.

A student is drinking a cup of hot chocolate as they sit by a campfire on a chilly evening. They know that the cup of hot chocolate transfers thermal energy to the surrounding air. The heated air over their cup of hot chocolate expands and rises and is replaced by cooler, denser air.
This method of energy transfer is —

Answers

Answer:

A student is drinking a cup of hot chocolate as they sit by a campfire on a chilly evening. They know that the cup of hot chocolate transfers thermal energy to the surrounding air. The heated air over their cup of hot chocolate expands and rises and is replaced by cooler, denser air.

This method of energy transfer is

Explanation:

Answer:

radiation

Explanation:

radiation is when an existing heat source spreads heat to its surroundings

Why Do Some Things Stop While Others Keep Going?

Answers

Answer:because they run out of energy when it is transferred and to other objects, or their kinetic energy

Explanation:

Because some get tired and the other one no

How many hydrogen atoms Is needed for C4H8 to become saturated

Answers

Answer:

2 atoms

Explanation:

Because it contain one double bond

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