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tangare [24]
4 years ago
10

Which describes an object in projectile motion? Check all that apply.

Chemistry
2 answers:
KATRIN_1 [288]4 years ago
8 0
When an object is thrown near the Earth's surface than it has a projectile motion. The thrown object is called projectile. The projectile is influenced by the gravity and moves along a curved path.<span>A projectile has an initial velocity, which is either horizontal or upward at an angle.</span>
An object in projectile motion is described with the following statements:
- <span>Gravity acts to pull the object down.
</span>- The path of the object is curved.
VladimirAG [237]4 years ago
5 0

IT - Gravity acts to pull the object down.

- The path of the object is curved.

that the answer i got it Right on the test

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Answer:

3.92 atm

Explanation:

The formula for the pressure of a gas is P = nRT/V. We have the following:

R - 0.0821 (gas constant)

T - 298 K

V - 3.66 L

n - ? (in moles)

We have to find the moles of the NH₃ gas. To do that, we have to divide the mass of the NH₃ gas by the molar mass of NH₃.

10.0 g × 1 mol NH₃/17.03 g NH₃ = 0.587 moles (rounded to 3 decimal places)

Now we have all the information needed to solve for the pressure.

P = nRT/V

P = (0.587)(0.0821)(298) ÷ 3.66

P = 14.3614246 ÷ 3.66

P = 3.923886503 ⇒ 3.92 atm (rounded to 3 decimal places)

The pressure of the NH₃ gas at a temperature of 298 K and a mass of 10.0 g is 3.92 atm.

Hope that helps.

8 0
3 years ago
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4 0
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cestrela7 [59]

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7 0
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The back titration method is typically used when one needs to determine the concentration of an analyte provided there is a known molar concentration of excess reactants. 
From the information given in the question above, we are told that excess NaOH was added. To correct this mistake, the right thing to do is to use additional HCl to carry out back titration, taking note of the quantity of acid that will be needed to neutralize the excess NaOH.
7 0
3 years ago
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