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Lady bird [3.3K]
4 years ago
15

What do physicists study? O A. Economics O B. The properties of matter C. Living things D. How matter and energy interact​

Chemistry
1 answer:
Bad White [126]4 years ago
5 0
D. how matter and energy interact
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What volume of beaker contains exactly 2.23x10^-2 mol of nitrogen gas at STP?
nikklg [1K]

Answer:

V = 0.5 L

Explanation:

Given data:

Moles of nitrogen = 2.23×10⁻² mol (0.0223 mol)

Temperature = 273 K

Pressure = 1 atm

Volume = ?

Solution:

PV = nRT

V = nRT / P

V = 0.0223 mol × 0.0821 atm. mol⁻¹. L . k⁻¹ × 273 K / 1 atm

V = 0.5 L

4 0
4 years ago
The photograph shows hexagonal basalt columns on a mountain that formed from a volcanic eruption in Iceland. Which of the follow
JulsSmile [24]

Lava that formed in these columns of Iceland is basaltic lava.

<h3>What is molten basaltic lava?</h3>

The Icelandic type causes the effusions of molten basaltic lava that flow from long, parallel fissures. Such outpourings produce lava plateaus. mountain type of mountains are formed due to such type of eruption of lava. The mountain was formed when the eruption occur under the ice sheet. Basaltic lava is another name of mafic lava. Mafic lava is molten rock that contain iron, magnesium and lower amount of silica. When mafic lava cools on the earth's surface, it produces basalt.

So we can conclude that Lava that formed in these columns of Iceland is basaltic lava.

Learn more about lava here: brainly.com/question/4871898

#SPJ1

6 0
2 years ago
If a substance increases the OH- concentration of pure water by 10^4. what is the pH of the solution?
soldi70 [24.7K]

Answer:

pH = 11

Explanation:

The concentration of OH⁻ in <em>pure water</em> is 10⁻⁷ M. If a substance increases OH⁻ concentration by 10⁴, the new concentration will be:

[OH⁻] = 10⁴ x 10⁻⁷ M = 10⁻³M

We can calculate pOH using it's definition:

pOH = -log[OH⁻] = -log (10⁻³) = 3

Then, we can find out pH using the following relation:

pH + pOH = 14

pH = 14 - pOH = 14 -3 = 11

Since pH = 11 is higher than 7, we can confirm that the substance is a base.

5 0
3 years ago
Write and label the density triangle
Slav-nsk [51]

Answer:

It is basically a way of telling you how to solve for different variables in the equation d=m/v

Explanation:

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3 years ago
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shepuryov [24]
The Outer Core Is Made Up Of Molten Nickel And Iron
6 0
3 years ago
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