3 years ago

7. Which of the following is a chemical property?

Chemistry

1 answer:

Goryan [66]3 years ago

8 0

Answer:

It ability to react with oxygen.

Explanation:

Freezing point and hardness can be altered. Physical properties can also be reversed. Chemical properties on the other hand cannot. The product after reaction with an element never changes.

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In this reaction, the covalent bonds in the molecules of hydrogen and oxygen are broken.

Westkost [7]

Answer: Endothermic

Explanation:

Bond-breaking is an endothermic process. Energy is released when new bonds form. Bond-making is an exothermic process. Whether a reaction is endothermic or exothermic depends on the difference between the energy needed to break bonds and the energy released when new bonds form.

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2 years ago

A soccer player applies a force of 56.6 N to a soccer ball while kicking it. If the ball has a mass of 0.46 kg, what is the acce

lubasha [3.4K]

Answer:

$a=123.04\ m/s^2$

Explanation:

Given that,

Force applied to a soccer player, F = 56.6 N

The mass of the ball, m = 0.46 kg

We need to find the acceleration of the soccer ball. The force acting on the ball is given by :

F = ma

Where

a is the acceleration

$a=\dfrac{F}{m}\\\\a=\dfrac{56.6 }{0.46 }\\\\a=123.04\ m/s^2$

So, the required solution is $123.04\ m/s^2$ .

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2 years ago

What element has the same number valence electrons as strontium?

Arturiano [62]

Answer:

Beryllium

Explanation:

They are in the same group

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2 years ago

Is soda an acid or a base

Aneli [31]

Answer:

It's an Acid

Explanation:

cuz of the Co2 and it's naturally acidic nature

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2 years ago

Calculate the pressure that a 10.5 N force with an area of 0.5 m2 exerts.

mixer [17]

Pressure = force/area
Pressure = 10.5/0.5
Pressure = 21 Pa

8 0

2 years ago