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3 years ago

2. What does the text list and describe?

Chemistry

1 answer:

Mariana [72]3 years ago

6 0

Answer:

C. ways radiation is transferred into and through Earth's atmosphere

Explanation:

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A 37.2-g sample of lead (Pb) pellets at 20Â°C is mixed with a 62.7-g sample of lead pellets at the same temperature. What are th

Vesnalui [34]

Answer:

Mass of sample is 99.9 g, density of ample is 11.35 $g/cm^{3}$ and temperature of sample is $20^{0}\textrm{C}$

Explanation:

Mass is an additive property. Therefore mass of combined sample is summation of masses of two pellets.

Mass of combined sample = (37.2+62.7) g = 99.9 g

Density is an intensive property. Therefore density of combined sample of lead will be same as with density of Pb.

Density of combined sample = 11.35 $g/cm^{3}$

Temperature is an intensive property. Therefore temperature of combined sample of lead will be same as with individual pellets.

temperature of combined sample = $20^{0}\textrm{C}$

8 0

3 years ago

Convert 8.7 mg to ibs

rjkz [21]

Answer:

Explanation:

6 0

4 years ago

Read 2 more answers

How will you test for the gas which is liberated when hcl reacts with an active metal ?

DENIUS [597]

When HCl reacts with a metal, hydrogen gas will be evolved. To test this gas, insert a burning splinter into the outlet of gas, the flame will be extinguished with a pop sound. This will confirm the gas is hydrogen.

8 0

3 years ago

At constant pressure, which of these systems do work on the surroundings? Check all that apply.

lana66690 [7]

I believe the correct answers from the choices listed above are the second and the last option. At constant pressure, the systems 2A(g) + B(g) ---> 4C(g) and 2C(g) A(s) + B(s) ---> C(g) produces work to the surroundings. <span>When a gas is evolved during a chemical reaction, the gas can be imagined as displacing the atmosphere - pushing it back against the atmospheric pressure. The work done is therefore V*P where V is the volume of gas evolved, and P is the atmospheric pressure. </span>

6 0

3 years ago

175 ml of a 1.6 m solution of kcl is diluted to a new volume of 1.0 l. what is the new concentration of the solution? (3 points)

djyliett [7]

175 ml of a 1.6 m solution of KCl is diluted to a new volume of 1.0 L. The new concentration of the solution is 0.28 m KCl.

Hence, Option (B) is correct answer.

<h3>What is Concentration ?</h3>

Concentration is defined as the measure of how much substance there is mixed with another substance.

<h3>How to find the concentration ?</h3>

To find the concentration use the dilution formula

C₁V₁ = C₂V₂

where,

C₁ = Concentration of starting solution

C₂ = Concentration of final solution

V₁ = Volume of the starting solution

V₂ = Volume of the final solution

Now put the values in above formula we get

C₁V₁ = C₂V₂

1.6 × 0.175 = C₂ × 1.0

0.28 = C₂ × 1.0

C₂ = 0.28

Thus from the above conclusion we can say that 175 ml of a 1.6 m solution of KCl is diluted to a new volume of 1.0 L. The new concentration of the solution is 0.28 m KCl.

Hence, Option (B) is correct answer.

Learn more about the Concentration here: brainly.com/question/17206790

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3 0

2 years ago