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Zielflug [23.3K]
3 years ago
14

All of the following are true except foreshocks can happen before an earthquake aftershocks can happen after an earthquake fores

hocks and aftershocks can happen at the same time foreshocks and aftershocks cannot happen at the same time
Chemistry
1 answer:
Snowcat [4.5K]3 years ago
4 0
Foreshocks and aftershocks can happen at the same time is not true. 
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1. Is O2 a compound? Explain.
zhuklara [117]
1. O2 is not a compound because it only contains one or more type of the same element atom.
2. O2 is a molecule because a molecule is one or more of the same element atom.
3. The law of conversion is that the mass of the system will stay the same when transfer takes place. Like if you had an equation O+H2—> H2O the mass will remain the same.

4. It will be equal to 10 because of law of conservation of matter.

5. One observation can be that the compound, reaction you’re observing, has change states.

4 0
3 years ago
2. Water is an example of a(n)
Alexus [3.1K]

it would be A ,inorganic Compound

6 0
3 years ago
A major component of gasoline is octane (C8H18). When octane is burned in air, it chemically reacts with oxygen gas (O2) to prod
Olin [163]

Answer:

The answer is 6.25g.

Explanation:

First create your balanced equation. This will give you the stoich ratios needed to answer the question:

2C8H18 + 25O2 → 16CO2 + 18H2O

Remember, we need to work in terms of NUMBERS, but the question gives us MASS. Therefore the next step is to convert the mass of O2 into moles of O2 by dividing by the molar mass:

7.72 g / 16 g/mol = 0.482 mol

Now we can use the stoich ratio from the equation to determine how many moles of H2O are produced:

x mol H2O / 0.482 mol O2 = 18 H2O / 25 O2

x = 0.347 mol H2O

The question wants the mass of water, so convert moles back into mass by multiplying by the molar mass of water:

0.347 mol x 18 g/mol = 6.25g

8 0
3 years ago
Read 2 more answers
Which has not been a major source of CFCs
ipn [44]

Answer : Any natural sources of CFC's are not known only the major sources like aerosols, propellants, refrigerants,etc are known. So, if any natural sources are given then it cannot be called as a major source for emitting CFC into environment.

4 0
3 years ago
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Which phrase correctly describes the outer shell of electrons of each atom in most covalent compounds?
d1i1m1o1n [39]
A, I just took the quiz and that was the answer
8 0
3 years ago
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