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Blababa [14]
3 years ago
6

What atoms are found in the phosphate group?

Chemistry
2 answers:
azamat3 years ago
7 0
Hello,
<span>

The answer is </span><span>oxygen atoms
</span>

Hope this helps


vodomira [7]3 years ago
5 0
A phosphate group is just a phosphorus atom<span> bound to four </span>oxygen atoms<span>, but it has many important roles. Along with </span>sugars<span> and bases, it makes up </span>nucleic acids<span>, like DNA and RNA. As part of energy carriers, like </span>ATP<span>, it provides energy for moving our muscles.</span>
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In the laboratory, hydrogen gas is usually made by the following reaction: Zn(s) + 2 HCl(aq) → H2(g) + ZnCl2(aq) How many liters
IrinaK [193]

<u>Answer:</u> The volume of hydrogen gas collected over water is 2.13 L

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Given mass of zinc = 5.566 g

Molar mass of zinc = 65.4 g/mol

Putting values in above equation, we get:

\text{Moles of zinc}=\frac{5.566g}{65.4g/mol}=0.0851mol

For the given chemical reaction:

Zn(s)+2HCl(aq.)\rightarrow H_2(g)+ZnCl_2(aq.)

As, HCl is present in excess. So, it is considered as an excess reagent.

Zinc is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

1 mole of zinc produces 1 mole of hydrogen gas.

So, 0.0851 moles of zinc will produce = \frac{1}[1}\times 0.0851=0.0851mol of hydrogen gas

To calculate the volume of hydrogen gas, we use ideal gas equation, which is:

PV = nRT

where,

P = Pressure of hydrogen gas = Total atmospheric pressure - vapor pressure of water = (752 - 18.65) mmHg = 733.35 mmHg

V = Volume of the hydrogen gas

n = number of moles of gas = 0.0851 moles

R = Gas constant = 62.3637\text{ L.mmHg }mol^{-1}K^{-1}

T = Temperature of hydrogen gas = 21^oC=[21+273]K=294K

Putting values in above equation, we get:

733.35mmHg\times V=0.0851mol\times 62.3637\text{ L.mmHg }mol^{-1}K^{-1}\times 294K\\\\V=\frac{0.0851\times 62.3637\times 294}{733.35}=2.13L

Hence, the volume of hydrogen gas collected over water is 2.13 L

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What evidence have u collected to explain the relationship between the Moon's revolution and lunar phrase?
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Answer:

A lunar eclipse can only happen during a full moon.

Hope I helped :)

Explanation:

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I need an answer ASAP<br><br> What important role do sand dunes play?
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Explanation

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What periodic trends exist for electronegativity?
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The highest electronegativity is in the elements in the top left corner of the periodic table, and the lowest in the bottom right corner. Therefore, traveling up or to the left across the periodic table will increase the electronegativity 
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Which process requires water to gain heat energy from the environment
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Answer:

Evaporation

Explanation:

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