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ipn [44]
4 years ago
12

Many elements that are essential for life,including nitrogen,oxygen,and carbon, are part of what classification?

Chemistry
1 answer:
Bess [88]4 years ago
8 0

Answer:

The answer is emma... C

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According to the following reaction, how many grams of iron(II) chloride will be formed upon the complete reaction of 21.6 grams
velikii [3]

Answer:

37.58 g of FeCl₂.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

Fe + 2HCl —> FeCl₂ + H₂

Next, we shall determine the mass of HCl that reacted and the mass of FeCl₂ produced from the balanced equation. This is can be obtained as follow:

Molar mass of HCl = 1 + 35.5 = 36.5 g/mol

Mass of HCl from the balanced equation = 2 × 36.5 = 73 g

Molar mass of FeCl₂ = 56 + (2×35.5)

= 56 + 71

= 127 g/mol

Mass of FeCl₂ from the balanced equation = 1 × 127 = 127 g

SUMMARY:

From the balanced equation above,

73 g of HCl reacted to produced 127 g of FeCl₂.

Finally, we shall determine the mass of FeCl₂ produced by the reaction of 21.6 g of HCl. This can be obtained as follow:

From the balanced equation above,

73 g of HCl reacted to produced 127 g of FeCl₂.

Therefore, 21.6 g of HCl will react to produce = (21.6 × 127)/73 = 37.58 g of FeCl₂.

Thus, 37.58 g of FeCl₂ were obtained from the reaction.

4 0
3 years ago
Smooth muscle myosin is a motor protein that plays a crucial role in the contraction of smooth muscle. If this protein has a mol
zysi [14]

Answer: Thus the mass, in grams, of 27 moles of smooth muscle myosin is 12960000 grams

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass, occupies 22.4 L at STP  contains avogadro's number (6.023\times 10^{23}) of particles.

Molecular mass of protein = 480,000 g/mol

Thus 1 mole of protein weighs = 480,000 g

So 27 moles of protein weighs = \frac{480,000}{1}\times 27=12960000g

Thus the mass, in grams, of 27 moles of smooth muscle myosin is 12960000 grams

6 0
4 years ago
Get help on stoichiometry
IgorLugansk [536]
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3 0
3 years ago
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Is chalk impermeable or permeable?
Gemiola [76]

Answer:

Permeable.

Explanation:

Most sediments of a chalky quality are permeable.

3 0
3 years ago
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Which contains the particles that are vibrating fastest?
zhuklara [117]
Dry air is the choice that is vibrating the fastest because its in a gas form which causes particles to vibrate quickly because of the heat.
7 0
3 years ago
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