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lozanna [386]
3 years ago
8

2. How old are the oldest fossils? Oldest rocks?During what period were these found? IT

Chemistry
1 answer:
Andre45 [30]3 years ago
8 0

Answer:

Fossils: 3.5 billion.  Rocks: 4.28 billion

they were found during Haden Eon

Explanation:

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First person with the right answer gets brainliest thanks (btw the numbers on the right are the answers choose the right one)
kap26 [50]
Molar mass of FE2O3=2(55.85)+3(16)=159.7

2.56g*1mol/159.7*2mol/1mol*55.85g/1mol=1.79g
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several dams on the colorado river in texas produce electricity through hydropower. what is an advantage of this type of energy
Ivanshal [37]

Explanation:

hydropower energy is:

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-environment friendly

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3 0
2 years ago
The element carbon (C) is most likely to form covalent bonds with the element
pochemuha
<span>Carbon (C) is most likely to form covalent bonds with Beryllium (Be) or Sodium (Na) because they are both metals and covalent bonds are metals that share their valence electrons with the gases / non-metals to get to the stable octet. Krypton is a gas and Selenium is a metalloid</span>
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2 years ago
What is the strongest interparticle force in a sample of kr?
Anit [1.1K]
Answer:
            London Dispersion Force<span> is the strongest interparticle force in a sample of Kr.

Explanation:
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7 0
3 years ago
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Nesterboy [21]

Answer:

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using boyles law

p1}V_{1} = P_{2}V2

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Pressure B

P2 = 4.30 bar× 179ml/896ml

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           = 2.859 bar

           

Explanation: Using Daltons law of partial pressure,the pressure is independently of each other when the gas is exerted.where we can use daltons law to find the pressure of each gas separately when it expands into the total volume in two containers.

7 0
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