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3 years ago

2. Which sentence explains how air pollution is harmful? *

1 answer:

4 0

Answer:Air Pollution is when gas and fuel is released into the air and damages the environment. The Answer out of your answers would be C.

Explanation:

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50 mol of p4o10 how many moles in p

Novosadov [1.4K]

Is there a picture for that

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3 years ago

Li₃N + 3 NH₄NO₃ 3 LiNO₃ + (NH₄)₃N

elena-s [515]

Double reaction is the answer

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3 years ago

Carbon-14 is a radioactive isotope that decays according to first-order kinetics in a process that has a half-life of 5730 years

Sliva [168]

Answer : The time passed in years is $2.83\times 10^3\text{ years}$

Explanation :

Half-life = 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 = let initial amount of the reactant = X g

a - x = amount left after decay process = $71\% \times (x)=\frac{71}{100}\times (X)=0.71Xg$

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

$t=\frac{2.303}{1.21\times 10^{-4}}\log\frac{X}{0.71X}$

$t=2831.00\text{ years}=2.83\times 10^3\text{ years}$

Therefore, the time passed in years is $2.83\times 10^3\text{ years}$

8 0

3 years ago

How many moles of CO2 are produced from the combustion of 5.25 moles of CH3OH?

iVinArrow [24]

First, we write the reaction for CH3OH combustion

CH3OH+3/2O2--->CO2+2H2O

for 1 mole of methanol, we get 1 mole of CO2, therefore for 5,25 moles of methanol we will get 5,25 moles of CO2

4 0

3 years ago

You will mostly find me in solid form at room temperature.<br> a<br> Metal<br> b<br> Nonmetal

Artist 52 [7]

Answer:

Nonmental.

Nonmetals are located on the far right side of the periodic table, except hydrogen, which is located in the top left corner.

Explanation:

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5 0

4 years ago