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2 years ago

The number of protons + number of neutrons is equal to the

Chemistry

1 answer:

max2010maxim [7]2 years ago

5 0

Answer: mass

Explanation: the protons and neutrons make up the nucleus and nearly the entire mass of the atom

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Convection of Heat occurs in what type(s) of matter? (Solid, Liquid, or Gas)

Naya [18.7K]

Answer:

Convection of heat occurs in Liquids and gases.

Explanation:

Convection is defined as the heat transfer due to bulk movement of molecules within the fluids. As liquid is a fluid and gas particles also moves so, convection of heat occur only in liquid and gases.

5 0

3 years ago

Describe are seasons like near the equator.

adell [148]

Answer:

Hi! Think of it like this:

You and your family are going to go on a vaction for the holidays, to south america or somewhere else. You´re near the equator so it will be warm. If you were to move there, you might pull out the swimsiutes because most of the time, its useally warm and sunny. They dont really get cold weather. They will have a nice and warm christmas.

3 0

2 years ago

The larger the molecules of a substance, the the London forces between them. A larger molecule has more electrons and a greater

aev [14]

Answer:

True

Explanation:

All the above statements buttress the fact that the larger molecule, the greater the magnitude of London forces between the molecules. Each of the statements above is a confirmation/explanation of this general rule.

6 0

2 years ago

The sidewalk outside is covered in ice what kind of shoes should i wear to walk on the ice explane

babunello [35]

Answer:

Well you should wear boots.

Explanation:

Boots because most winterized boots have tread on the bottom, allowing you to grip the ice better. They will help prevent you from slipping , and are even good for walking up slippery hills.

4 0

2 years ago

NH4NO3, whose heat of solution is 25.7 kJ/mol, is one substance that can be used in cold pack. If the goal is to decrease the te

makvit [3.9K]

Answer:

There are necessaries 35,2g of NH₄NO₃ per 100,0g of water to decrease the temperature of the solution from 25,0°C to 5,0°C

Explanation:

To decrease the temperature of the solution there are necessaries:

4,184J/g°C×(5,0°C-25,0°C)×(100,0g+X) = -Y

8368J + 83,68J/gX = Y (1)

Where x are grams of NH₄NO₃ you need to add and Y is the energy that you need to decrease the heat.

Also, the energy Y will be:

Y = 25700J/mol× $\frac{1mol}{80,043g}$ X

Y = 321J/g X (2)

Replacing (2) in (1)

8368J + 83,68J/g X = 321J/g X

8363J = 237,32J/gX

X = 35,2g

Thus, there are necessaries 35,2g of NH₄NO₃ per 100,0g of water to decrease the temperature of the solution from 25,0°C to 5,0°C

I hope it helps!

6 0

3 years ago