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Lostsunrise [7]
4 years ago
9

How did worldwide infant mortality and life expectancy changed between 1900 ?

Chemistry
2 answers:
Setler79 [48]4 years ago
8 0
<span>infant mortality decreased and life expectancy increased

I hope this answered your question :)</span>
Pavel [41]4 years ago
3 0
<span>Infant mortality dropped significantly - raising the average age at death. It depends on how you look at the statistics. </span>
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If you have 2 Moles of C3H6 and 10 Moles of O2, which reactant is limiting the following reaction: 2C3H6 + 9O2 → 6CO2 + 6H2O?
Hatshy [7]

Answer:

The limiting reactant is propene, C_3H_6.

Explanation:

2C_3H_6 + 9O_2 \rightarrow 6CO_2 + 6H_2O

Moles of nitrogen propene  = 2 mol

Moles of oxygen  = 10 mol

According to reaction, 2 moles of propene reacts with 9 moles of oxygen gas, then 2 moles of propene will react with:

=\frac{9}{2}\times 2mol=9\text{mol of oxygen gas}

According to the question, we have 10 moles of oxygen gas, which is more than 9 moles of oxygen gas. This indicates that propene is present in a limiting amount hence, it is a limiting reactant.

The limiting reactant is propene, hence the correct answer is the C_3H_6.

5 0
3 years ago
What electrical science term did benjamin franklin coin?
Kruka [31]

Answer:

The term "Battery"

Explanation:

3 0
2 years ago
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bezimeni [28]

Answer:

for 1 solid its freezing.

for 2 solid and liquid its melting

for 6 liquid to gas its evaporation and for 5 gas  to liquid its condensation.

Explanation:

hope this helped :)

5 0
3 years ago
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2 years ago
The annual production of HNO3 in 2013 was 60 million metric tons Most of that was prepared by the following sequence of reaction
Finger [1]

Answer:

1.6\times 10^{-6} M/s is the rate of formation of nitrogen dioxide.

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

2NO+O_2\rightarrow 2NO_2

Given: Order with respect to O_2 = 1

Order with respect to NO = 2

Thus rate law is:

R=k[NO]^2[O_2]^1

k= rate constant

R=k[NO]^2[O_2]^1

=5.8\times 10^{-6} s/L^2/mol ^2\times (0.75 M)^2\times ( 0.50 M)^1

R = 1.6\times 10^{-6} M/s

1.6\times 10^{-6} M/s is the rate of formation of nitrogen dioxide.

6 0
4 years ago
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