3 years ago

Distilled water will

1 answer:

6 0

The answer is (c) as distilled water has the same pH as normal water therefore it is not able to react with any litmus paper.
Hope this helps :).

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KOH and LiOH are examples of bases neutral compounds acids salts

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It is an example of bases

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3 years ago

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The s subshell can hold up to two electrons in an atom. True or False

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True but this can vary

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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.

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2 years ago

How many protons does an atom of gold have?

klasskru [66]

Answer:

There are 79 protons in the nucleus of one Gold atom.

Explanation:

The number of protons of any given atom/element can be determined by the atomic number of the specific element, which is found on the periodic table.

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3 years ago

The change in speed that could occur in 4 seconds in an object with an acceleration of 6 m/s/s.

bazaltina [42]

Answer:

24m/s

Explanation:

a=change of v/change of t

6m/s^2=v/4s

multiply both sides by 4s

v=24m/s

4 0

2 years ago