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3 years ago

Describe two ways of using solar energy.

Chemistry

1 answer:

ioda3 years ago

5 0

Answer:

There are three primary technologies by which solar energy is harnessed: photovoltaics (PV), which directly convert light to electricity; concentrating solar power (CSP), which uses heat from the sun (thermal energy) to drive utility-scale, electric turbines; and solar heating and cooling (SHC) systems, which collect ...

Hydropower is the most important and widely-used renewable source of energy. Hydropower represents about 17% (International Energy Agency) of total electricity production. China is the largest producer of hydroelectricity, followed by Canada, Brazil, and the United States (Source: Energy Information Administration).

There are four ways to release the energy stored in biomass: burning, bacterial decay, fermentation, and conversion to gas/liquid fuel.

Geothermal energy can heat, cool, and generate electricity: Geothermal energy can be used in different ways depending on the resource and technology chosen—heating and cooling buildings through geothermal heat pumps, generating electricity through geothermal power plants, and heating structures through direct-use ...

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Why h2o has higher boiling point than nh3

Hoochie [10]

Answer:

H2O molecules are thus able to form an average of 4 H-bonds. H2O has a higher boiling point than NH3 because (i) the H-bonds are stronger and (ii) it contains twice as many H-bonds. H2O has a higher boiling point than HF because it contains twice as many H- bonds, despite these being individually weaker.

Explanation:

hope this is helpful

4 0

3 years ago

CHEMISTRY HELP <br><br> I don't understand this....please help? thank you in advance

Igoryamba

60 i believe i haven't did science in a while sorry if im wrong though... ._.

6 0

3 years ago

An acid would __________. Group of answer choices turn red litmus paper blue react with bases to create a neutral solution react

Wewaii [24]

Answer:

blue react with bases to create a neutral solution

Explanation:

A strong acid will react with a strong base to form a neutral (pH = 7) solution.

3 0

4 years ago

A certain first-order reaction is 27.5 percent complete in 8.90 min at 25°C. What is its rate constant?

jeyben [28]

Answer:

$k= 0.145min^{-1}$

Explanation:

Hello there!

In this case, according to the given information, it turns out necessary for us remember that the first-order kinetics is given by:

$ln(A/A_0)=-kt$

Whereas the 27.5% complete means A/Ao=0.275, and thus, we solve for the rate constant as follows:

$k=\frac{ln(A/A_0)}{-t}$

Then, we plug in the variables to obtain:

$k=\frac{ln(0.275)}{-8.90min}\\\\k= 0.145min^{-1}$

Regards!

4 0

3 years ago

What’s the correct IUPAC name for the compound shown here?

worty [1.4K]

Answer : The correct IUPAC name for the compound is, 2,2,4,5-tetramethyl-3-ethylhexane.

Explanation :

The basic rules for naming of hydrocarbons are :

First select the longest possible carbon chain.

The longest possible carbon chain should include the carbons of double or triple bonds.

The naming of alkane is done by adding the suffix -ane, alkene by adding the suffix -ene, alkyne by adding the suffix -yne.

If two or more similar alkyl groups are present in a compound, the prefixes di-, tri-, tetra- and so on are used to specify the number of times of the alkyl groups in the chain.

In the give compound, the longest possible carbon chain has 6 carbon atoms. So, the prefix used will be 'hex-' and also the carbon has single bond between them, so it is an alkane. Four methyl group is present at 2,2,4,5 position of carbon chain and one ethyl group is present at 3 position.

Hence, the correct IUPAC name for the compound is, 2,2,4,5-tetramethyl-3-ethylhexane.

8 0

3 years ago