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kifflom [539]
3 years ago
7

Caila designs a model to test how the use of different combinations of energy resources would affect global temperatures. Which

of these combinations is likely to produce the lowest increase in temperature in her model?
A. Geothermal and oil

B. Solar and hydroelectric

C. Biofuels and wind

D. Natural gas and coal
Chemistry
2 answers:
Igoryamba3 years ago
6 0
Solar and hydroelectric (just took test)
nikdorinn [45]3 years ago
4 0

The answer is B. Solar and hydroelectric energy are renewable sources of energy. This means that they are sustainable hence cannot be depleted since they renew themselves at sufficient rates. They have the lowest carbon footprint compared to the other choices’ combinations. Therefore due to their low greenhouse gas emissions, they contribute the least to global warming.

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True or false: the most easily ionizable elements are the most electronegative.
ehidna [41]
<span>False, This is because when you can easily ionize and atom or the chances of it being ionizable are quite high, it means that that particular atom have very low ionization potential that is the reason why it was easily ionizable An atom with a high ionization power and a firmly negative electron fondness will both pull in electrons from different particles and oppose having its electrons taken away; it will be an exceedingly electronegative molecule.</span>
3 0
3 years ago
How many grams of KBr is required to prepare 100 mL of<br> 2.0 M KBr solution?
sesenic [268]

Answer:

23.8g

Explanation :

Convert 2.0M into mol using mol= concentration x volume

2.0M x 0.1L (convert 100mL to L since the units for M is mol/L)

= 0.2 mol

We can now find grams by using the molar mass of KBr

=119.023 g/mol (Found online) webqc.org

but can be be calculated by using the molecular weight of K and Br found on the periodic table

We can now calculate the grams by using grams=mol x molar mass

119.023g/mol x 0.2mol

= 23.8046 g

=23.8g (rounded to 1decimal place)

4 0
3 years ago
The electron affinity of an element is positive if energy is absorbed during the process of accepting an electron and negative i
julsineya [31]

Answer:

See explanation

Explanation:

Electron affinity is the energy released when an extra electron is added to a neutral gaseous atom. A negative value of electron affinity indicates that energy is given out and vice versa.

Metals have positive electron affinity since electrons rarely accept electrons, so;

Na(g)+ 1e^- → Na^-(g)      positive

Mg(g)+1e^- → Mg^-(g)      positive

For the last case; Br(g)+ 1e^- → Br^-(g), the electron affinity for the non-metals is negative. hence the answer

5 0
3 years ago
Is salt in a sugar bowl considered a solution
charle [14.2K]

The Answer is no. hope this help c:

7 0
3 years ago
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Which is least likely to cause eutrophication?
dangina [55]
The answer is nitrates.
3 0
4 years ago
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