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Rainbow [258]
4 years ago
11

Which is the oldest?

Chemistry
1 answer:
Darina [25.2K]4 years ago
6 0


The answer is A. Precambrian


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Which kind of bond occurs when two atoms share an electron
Dmitriy789 [7]

Answer:

<h2>Covalent bond</h2>

Explanation:

6 0
4 years ago
The air pressure for a certain tire is 109 kPa. What is this pressure in atmospheres?​
Len [333]

1.08 atm is the pressure for a certain tire in atmosphere.

<u>Explanation:</u>

One kilo pascal (1 kPa) corresponds to 1000 pascal. Another common unit used for pressure is atmosphere (symbolised as ‘atm’). 1 atm refers the standard atmospheric pressures and corresponds to 760 mm Hg and 101.3 kPa. Atmospheric pressures are commonly referred as square inches (psi)/ pounds.

  1 \mathrm{atm}=101.3 \mathrm{kPa}=101,325 \mathrm{Pa}=760 \mathrm{mm} \mathrm{Hg}=760 \text { torr }=14.7 \mathrm{lb} / \mathrm{in}^{2}(\mathrm{psi})

Given:

The air pressure for a certain tire = 109 kPa

We need to find pressure in atmospheres

So, we know,

1 atm = 101.3 kPa

Hence,

\frac{109 \mathrm{kPa}}{1} \times \frac{1 \mathrm{atm}}{101.3 \mathrm{kPa}}=1.076=1.08 \mathrm{atm}

1.08 atm is the pressure for a certain tire in atmosphere.

3 0
4 years ago
Question 5
Zina [86]

Answer:

Explanation:

2.2 g/mL is the answer.

4 0
3 years ago
A family from Texas flies to Washington, D.C. in an airplane traveling 1,362 miles in 3 hours. What is the average speed in mile
Lady bird [3.3K]

Answer:

The answer is 454

Explanation:

1362 divided by 3 = 454

4 0
3 years ago
Water is 11% hydrogen and 89% oxygen by mass. How many grams of oxygen are in a 250 g glass of water?
SCORPION-xisa [38]
222.5 g

I did it like this:

X/250= 89/100=
22250/100=
222.5
4 0
3 years ago
Read 2 more answers
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