3 years ago

Describe 3 properties of a frozen fruit far including state of matter

Chemistry

1 answer:

miv72 [106K]3 years ago

4 0

Nucleic Acids, Protein Coat,and Lipid Membrane

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3 years ago

What is the electron configuration for 1s2 2s2 2p6 3s2 3p6

Sliva [168]

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3 years ago

A sample of 28 Mg decays initially at a rate of 53500 disintegrations per minute, but the decay rate falls to 10980 disintegrati

prisoha [69]

Answer : The half life of 28-Mg in hours is, 6.94

Explanation :

First we have to calculate the rate constant.

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

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

where,

k = rate constant

t = time passed by the sample = 48.0 hr

a = initial amount of the reactant disintegrate = 53500

a - x = amount left after decay process disintegrate = 53500 - 10980 = 42520

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

$k=\frac{2.303}{48.0}\log\frac{53500}{42520}$

$k=9.98\times 10^{-2}hr^{-1}$

Now we have to calculate the half-life.

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

$9.98\times 10^{-2}=\frac{0.693}{t_{1/2}}$

$t_{1/2}=6.94hr$

Therefore, the half life of 28-Mg in hours is, 6.94

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3 years ago

In a combustion reaction, one of the reactants is _____.

zepelin [54]

The answer is oxygen

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Gas A effuses 0.68 times as fast as Gas B. If the molar mass of Gas B is 17 g, what is the mass of Gas A?

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The mass of gas A is 11.56. i got this answer by 0.68 multiplied by 17. because in this problem the key word is times.

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3 years ago