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strojnjashka [21]
3 years ago
14

Why is magma so hot?

Chemistry
1 answer:
Eduardwww [97]3 years ago
6 0

Answer: Friction in the center of the earth makes melts rocks and makes magma

Explanation:

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A certain isotope has 53 protons 78 neutrons and 53 electrons. What is its atomic number? What is the mass number of this atom?
statuscvo [17]

Answer:

  1. 53 protons
  2. 131g
  3. Iodine
  4. Halogens

Explanation:

atomic no. = no. of protons

= 53 proton

mass = no. of protons + no. of

neutrons

= 53 + 78

= 131

5 0
3 years ago
Which type of salt would be most effective for melting ice on roads?
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Calcium Chloride is the salt that is effective for melting ice on roads

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The expression below was formed by combining different gas laws. V is proportional to StartFraction n T over P EndFraction. Whic
Ronch [10]

Answer:

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Explanation:

From the given question, we have:

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V = \frac{nRT}{P}

where R is the ideal gas constant

cross multiply to have;

PV = nRT

This implies that the volume of the gas is directly proportional to the number of moles of the gas.

Therefore, the law can be used to determine the relationship between the volume and number of moles is the ideal gas law.

3 0
2 years ago
Select the correct answer.
GREYUIT [131]

Answer:HNO3 + NaOH → H2O + NaNO3

Explanation:

8 0
3 years ago
What is the SI base unit for length?
sp2606 [1]

The SI base unit for length is meter.

In order to make smaller measurements, you can use the centi-, milli-, micro-, etc. prefixes.

When you want to reference larger measurements, you can use the kilo-, mega-, giga- and prefixes such as those.

5 0
3 years ago
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