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3 years ago

e) Hydrogen gas is a non-metal and can be prepared in a laboratory Explain why hydrogen gas is collected over water.

Chemistry

1 answer:

Luda [366]3 years ago

3 0

Answer:

to collect pure hydrogen and avoid mixing with air

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MgNH4PO4•6H2O loses H2O in a stepwise fashion as it is heated. Between 40 degrees celsius and 60 degrees celsius, the monohydrat

tino4ka555 [31]

Answer:

$\%\ Composition\ of\ phosphorus=20.00\ \%$

Explanation:

The molecular formula of the monohydrate formed = $MgNH_4PO_4.H_2O$

The molecular mass of the monohydrate formed = $Mass_{Mg}+Mass_{N}+6\times Mass_{H}+5\times Mass_O$

So, Mass = 24 + 14 + 6 × 1 + 5 × 16 = 155 g

Mass of phosphorus = 31 g

Thus,

$\%\ Composition\ of\ phosphorus =\frac{Mass_{phosphorus}}{Total\ mass}\times 100$

$\%\ Composition\ of\ phosphorus=\frac{31}{155}\times 100$

$\%\ Composition\ of\ phosphorus=20.00\ \%$

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3 years ago

An isotope of cesium has 55 protons and 78 neutrons. What is the mass number of this isotope?

mixer [17]

The only stable caesium isotope is 133Cs, with 78 neutrons.

Hope this answers your Q

4 0

3 years ago

What is the total number of atoms of magnesium and phosphorus in 3Mg3(PO4)2?

JulsSmile [24]

Since the given formula is . According to cross method formula, magnesium has +2 charge so, is multiplied by 2.
Thus, 1 molecule of magnesium phosphate will contain 2 atoms of phosphorus.
Therefore, three molecules of magnesium phosphate contains following number of atoms.
Mg = 9
P = 6
O = 24
Hence, we can conclude that there are 6 atoms of phosphorus in three molecules of magnesium phosphate, .

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3 years ago

Cultures glowing under UV light annotate transformation of the original bacteria with the pGLO plasmid. Bacteria without the pGL

victus00 [196]

Answer: Contamination

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3 years ago

With regard to the pH scale, a solution with a pH

worty [1.4K]

I believe the correct response is A. A solution with a pH close to 14 is considered a strong base.

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3 years ago

e) Hydrogen gas is a non-metal and can be prepared in a laboratory Explain why hydrogen gas is collected over water.​

e) Hydrogen gas is a non-metal and can be prepared in a laboratory Explain why hydrogen gas is collected over water.