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Makovka662 [10]

3 years ago

9

there are tiny plants growing on rock fence after the several year . you observe something happened on the rock which of the fol

lowing describes your observations ? the plants the rock

1 answer:

Bingel [31]3 years ago

5 0

it is moss

Explanation:

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Blue and orange, which color can be best absorbed?

baherus [9]

Blue is the color that can be best absorbed, as orange is the color seen.

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3 years ago

There are 7 named classes of hazardous materials.<br> O True<br> O False

Anika [276]

False

there is actually 9

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3 years ago

The conversation of cyclopropane to propene in the gas phase is a first order reaction with a rate constant of 6.7x10-⁴s-¹. a) i

Rus_ich [418]

Answer: a) The concentration after 8.8min is 0.17 M

b) Time taken for the concentration of cyclopropane to decrease from 0.25M to 0.15M is 687 seconds.

Explanation:

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

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process

a) concentration after 8.8 min:

$8.8\times 60s=\frac{2.303}{6.7\times 10^{-4}s^{-1}}\log\frac{0.25}{a-x}$

$\log\frac{0.25}{a-x}=0.15$

$\frac{0.25}{a-x}=1.41$

$(a-x)=0.17M$

b) for concentration to decrease from 0.25M to 0.15M

$t=\frac{2.303}{6.7\times 10^{-4}s^{-1}}\log\frac{0.25}{0.15}\\\\t=\frac{2.303}{6.7\times 10^{-4}s^{-1}}\times 0.20$

$t=687s$

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3 years ago

How do cheetos store energy?

just olya [345]

Answer:

Calories

Explanation:

they cheeto substance is compared in various ways but our body consoles it by its calories which is a unit of energy as it give us the energy to keep our body warm

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3 years ago

suppose you wanted to compare two different stain removers to learn which one was better at removing food stains from clothing.

Dovator [93]

Answer:

The amount/type of stain

Explanation:

You would want to ensure that the stain was the same in both samples.

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2 years ago