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3 years ago

11

Which statement describes the masses of the particles that make up an atom?

1 answer:

ryzh [129]3 years ago

8 0

<span>An atom is the smallest component of matter that keeps all of the chemical properties of an element. Atoms merge to form molecules, which then connect to form solids, gases, or liquids. Atoms are made up of three basic particles: protons, electrons, and neutrons. Atoms have different properties based on the order and number of their basic particles. Protons and neutrons have accurate mass, about 1.67x10 -24 grams.</span>

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What is the answer to “An element is:”

Jobisdone [24]

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Vlad [161]

Answer : The time passed in years is $2.74\times 10^2\text{ years}$

Explanation :

Half-life of carbon-14 = 5730 years

First we have to calculate the rate constant, we use the formula :

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

$k=\frac{0.693}{5730\text{ years}}$

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

Now we have to calculate the time passed.

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 = $1.21\times 10^{-4}\text{ years}^{-1}$

t = time passed by the sample = ?

a = initial amount of the reactant disintegrate = 15.3

a - x = amount left after decay process = 14.8

Now put all the given values in above equation, we get

$t=\frac{2.303}{1.21\times 10^{-4}}\log\frac{15.3}{14.8}$

$t=274.64\text{ years}=2.74\times 10^2\text{ years}$

Therefore, the time passed in years is $2.74\times 10^2\text{ years}$

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What color do you get if you mix red and blue light?

andrezito [222]

Answer:

Purple light.

Yellow light.

Explanation:

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