What is a contributor of global warming?

Chemistry

2 answers:

iogann1982 [59]3 years ago

8 0

Carbon dioxide emissions from, well, whatever emits CO2 really.

svet-max [94.6K]3 years ago

7 0

Answer: B. Carbon dioxide

Explanation: Global warming arises due to the emission of gases which are accumulated in the atmosphere, that is, the layer of these gases increases in an atmosphere, and prevents the reflected sun rays from the ground to leave the atmosphere. Such a higher amount of sunshine-heat which is higher than necessary, remains in the atmosphere and heats the surface of the earth, which is the effect of the greenhouse. These are gases produced by combustion of fossil fuels, and during this combustion they are emitted into the atmosphere. Gases that cause the greenhouse effect are carbon dioxide, methane and nitrous oxide. The problem is that fossil fuels are used to produce electricity, in agriculture and transport. Global warming has drastically increased over the past decades, and if preventive measures which involving the use of alternative fuels are not undertaken, the catastrophic consequences, which are already visible, will be even greater.

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How many grams of KBr are required to make 350. mL of a 0.115 M KBr solution?

Vsevolod [243]

0.115 M means that 0.115 moles of KBr are contained in a volume of 1000 ml, therefore a volume of 350 ml will have (0.115 × 0.35) = 04025 moles
From the formula of molarity moles = molarity × volume in liters
1 mole of KBr is equivalent to 119 g
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3 years ago

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Which of the following reactions involves a single compound producing two or more simpler substances?

castortr0y [4]

Answer:

Decomposition or cracking

Explanation:

In a decomposition or cracking reaction, a single compound produces two or more simpler substances.

It involves the formation of two or more products from a single reactant.

A → B + C

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The driving force for such a reaction is the is high positive heat of formation of the compound that is, extreme instability of the compound.

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3 years ago

V2 = (P1 × V1 × T2) (P2 × T1) A gas with a beginning pressure of 2 atm at a temperature of 300 K has a volume of 20 ml. What wil

rusak2 [61]

6.6ml will be the new volume if the pressure increases to 4 atm and the temperature are lowered to 200 K.

<h3>What is an ideal gas equation?</h3>

The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

Given data:

$V_1=20 ml$