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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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What is the mass number, symbol, and charge of an atom that contains 19 protons, 20 neutrons and 19 electrons?
Crazy boy [7]

Answer:

Explanation:

mass number = 19 + 20 = 39 (protons + neutrons)

The charge is  0. This is an atom

The symbol = K

Protons: 19

Electrons: 19

Neutrons: 20

8 0
3 years ago
What is the oxidation number of manganese (Mn) in potassium permanganate (KMnO4)? (3 points)
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An atom has 3 protons, two electrons and 1 neutrons. Describe this atom using as many vocabulary words
andre [41]

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Explanation:

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3 years ago
What voltage will produce 3 A through a circuit that has 15<br> ohms of resistance?
lozanna [386]

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5 ohms of resistance

Explanation:

15/3=5

6 0
2 years ago
Read 2 more answers
Use this condensed chemical structure
liberstina [14]

Answer:

number of carbon-carbon single (C - C) bonds: 1

number of carbon-hydrogen single (C H) bonds: 5

number of nitrogen-hydrogen sing le (N H) bonds:2

number of lone pairs: 1

Explanation:

Ethanamine is a colourless gas having a strong 'ammonia- like' odour. It contains the -NH2 group which makes it an amine. It contains one carbon-carbon bond, five carbon-hydrogen bonds and two nitrogen-hydrogen bonds.

Nitrogen, being sp3 hybridized in the compound has a lone pair of electrons localized on one of the sp3 hybridized orbitals of nitrogen while one sp3 hybridized orbital of nitrogen is used to form a carbon-nitrogen bond. The other two sp3 hybridized orbitals on nitrogen are used to form the two nitrogen-hydrogen bonds.

6 0
2 years ago
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