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3 years ago

Discuss the environmental problems caused by the combustion of fossil fuels(a few lines only)

1 answer:

5 0

Burning fossil fuels release a lot of carbon dioxide which is a greenhouse gas which contributes to global warming. Also burning of fossil fuels causes a lot of air pollution. You can also describe in detail the effect of carbon dioxide on global warming in general

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How large a volume is needed to contain 21 germs of sliver

Tema [17]

Density is a physical property of a substance that represents the mass of that substance per unit volume. It is a property that can be used to describe a substance. We calculate the volume as follows:

21 grams Ag ( 1 L / 10.5 grams ) = 2 L of container is needed for the given mass of silver

Hope this answers the question. Have a nice day.

5 0

3 years ago

When you move one of the bonding pairs of a molecule closer to another one, what is the effect?

Dennis_Churaev [7]

Answer:

They repel due to a force of repulsion

3 0

3 years ago

How many moles of hydrogen molecules (h2) would be required to produce two moles of hydrogen peroxide (h2o2)?

SashulF [63]

Their should be two molecules of hydrogen (h2) to produce 2 moles of h2O2

3 0

4 years ago

Consider the reaction: 2NO(g) O2(g) --> 2NO2(g) Suppose that at a particular moment during the reaction nitric oxide (NO) is

poizon [28]

Answer:

a. 0.0022 M/s

b. 0.0011 M/s

Explanation:

Let's consider the following reaction.

2 NO(g) + O₂(g) → 2 NO₂(g)

The rate of disappearance of NO is 0.0022 mol NO. L⁻¹.s⁻¹

<em>a. At what rate is NO₂ being formed?</em>

The molar ratio of NO to NO₂ is 2:2. The rate of formation of NO₂ is:

$\frac{0.0022molNO}{L.s} .\frac{2molNO_{2}}{2molNO} =\frac{0.0022molNO_{2}}{L.s}$

<em>b. At what rate is molecular oxygen reacting?</em>

The molar ratio of NO to O₂ is 2:1. The rate of disappearance of O₂ is:

$\frac{0.0022molNO}{L.s} .\frac{1molO_{2}}{2molNO} =\frac{0.0011molO_{2}}{L.s}$

8 0

3 years ago

Read 2 more answers

A 55 kg person on Earth has the __________mass on the moon.

Semmy [17]

Answer:

89.1 N

Explanation:

W = m gm = 55.0 x 1.62 = 89.1 N

5 0

3 years ago