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lianna [129]
3 years ago
5

A diver's tank contains helium at 924 psi,

Chemistry
1 answer:
Len [333]3 years ago
4 0
423 psi

Hope this helps and GOOD LUCKKK :)))
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Acidified water is electrolysed by using carbon electrodes. What is produced
kotegsom [21]

Answer:

Hydrogen gas

Explanation:

During electrolysis of acidified water, H+ ions are reduced to H2 gas at the negative carbon electrode (cathode) and hence hydrogen gas is liberated at cathode.

5 0
3 years ago
Calculate the number of atoms in 112 g of iron.​
mr_godi [17]

Answer:

1 mole of iron (Fe) = 56 g (molar mass)

Since 56 g of iron = 1 mol.

Therefore, 112 g of iron= 1/ 56 ×112 mol = 2 mol.

Explanation:

8 0
3 years ago
What would you have to do to the substance in
jenyasd209 [6]
By using thermal energy which is also heat energy the substance in cup A will melt becoming a liquid behaving like the substance in cup B
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2 years ago
A solution with a [H+] of 1.22x10-3M has a pH of _____________________.
Kryger [21]

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2.91

Explanation:

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- Hope that helps! Please let me know if you need further explanation.

7 0
3 years ago
2. Calculate the mass of 3.47x1023 gold atoms.
lapo4ka [179]

3.47 x 10^{23} atoms of gold have mass of 113.44 grams.

Explanation:

Data given:

number of atoms of gold = 3.47 x 10^{23}

mass of the gold in given number of atoms = ?

atomic mass of gold =196.96 grams/mole

Avagadro's number = 6.022 X 10^{23}

from the relation,

1 mole of element contains 6.022 x 10^{23} atoms.

so no of moles of gold given = \frac{3.47 X 10^{23}  }{6.022 X 10^{23} }

0.57 moles of gold.

from the relation:

number of moles = \frac{mass}{atomic mass of 1 mole}

rearranging the equation,

mass = number of moles x atomic mass

mass = 0.57 x 196.96

mass = 113.44 grams

thus, 3.47 x 10^{23} atoms of gold have mass of 113.44 grams

3 0
3 years ago
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