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saveliy_v [14]
4 years ago
5

Help me with this don't understand plz

Chemistry
1 answer:
Norma-Jean [14]4 years ago
3 0
When magma in the mantle gets hot, it rises up to the top of the mantle, (against the crust) and begins to cool down. Since new magma is always being heated and rising, it pushes the now cooled down magma aside to take its place. When this occurs the cooled magma shifts the the earths crust when being pushes aside by the rising mantle.
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Which of the following are strong electrolytes in water?
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Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl:
kow [346]

Answer:

The volume of hydrogen gas generated by given reaction is 9.48 L

Explanation:

Firstly, we calculate the mole of Zinc added, n = 25.5 / 65 = 0.392 mol

With the same equivalent, the mole of generated hydrogen gas will be the same, at 0.392 mol.

Secondly, we get the equation

<em>P . V = n . R . T</em>

with P (pressure, atm), V (volume, litre), n (mole, mol), R (ideal gas constant, 0.082), T (temperature, Kelvin)

So we have to convert the given information to correct unit

P = 742 mmHg = 0.976 atm

T = 15 °C = 288 K

Hence we can calculate the generated volume by

V = n . R . T / P = 0.392 x 0.082 x 288 / 0.976 = 9.48 L

3 0
4 years ago
What is the molarity of a solution that contains 1.78 moles of KNO3 dissolved in 2.50L of water?
Alexxandr [17]

Answer:

molarity= 0.712M

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3 years ago
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