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3 years ago

9

Why does surface area of a reactant influence the rate of the reaction?

1 answer:

telo118 [61]3 years ago

7 0

because it can influence how frequently and sufficiently the particles collide depending on the space it has to do so, for example a large surface area would be have a slower rate of reaction and a lower temperature. (the rate of reaction in terms of concentration, it is diffused from high to low)

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How many atoms of hydrogens are found in 3.21 mol of<br>C3H8?

damaskus [11]

Answer:

1.55 × 10²⁵ atoms of H

Explanation:

3.21mol C₃H₈ × 8mol H × (6.022×10²³)

8 0

3 years ago

A fossil was analyzed and determined to have a carbon-14 level that is 70 % that of living organisms. The half-life of C-14 is 5

Citrus2011 [14]

Answer: 2948

Explanation:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

$t_{\frac{1}{2}}=\frac{0.693}{k}$

$k=\frac{0.69}{t_{\frac{1}{2}}}=\frac{0.693}{5730}=1.21\times 10^{-4}years^{-1}$

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $1.21\times 10^{-4}years^{-1}$

t = age of sample = ?

a = let initial amount of the reactant = 100

a - x = amount left after decay process = $\frac{70}{100}\times 100=70$

$t=\frac{2.303}{1.21\times 10^{-4}}\log\frac{100}{70}$

$t=2948years$

Thus the fossil is 2948 years old.

5 0

3 years ago

The bonding found in calcium chloride is

photoshop1234 [79]

<span>The bonding found in calcium chloride is i</span>onic bonds.

I hope this helps!

4 0

3 years ago

Nagine you are repeatedly lifting a weight into the air up to a height of 2 m. Assuming in each litt

Mariulka [41]

Answer:

A

Explanation:

8 0

3 years ago

What is the chemical formula for light energy

Goshia [24]

There is no chemical formula for light energy because light is not a chemical.

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3 years ago