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4 years ago

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

2 answers:

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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Determine the pressure, in atm, for 3.66 Liters of NH3 gas at a temperature of 298 K and a

Dafna1 [17]

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

What are valence shell electrons?

dexar [7]

Valence shell electrons are electrons, (e- for short) that live in the outermost shell of the e- cloud. These e- are often the ones associated with reactivity and bonding.

4 0

3 years ago

Which sphere exists because of there is liquid iron as part of the earth's core? A.hydrosphere B.atmosphere C.magnetosphere D.li

Naily [24]

The answer is lithosphere

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4 years ago

At one point in your life, you might have played on a swing. Have you ever wondered why, after the first swing, it will slow dow

cestrela7 [59]

Answer:

at the top of the swing

at the bottom of the swing

Explanation:

7 0

3 years ago

A 25.0 ml sample of an unknown monoprotic acid was titrated with 0.12 m naoh. the student added 31.6 ml of naoh and went past th

Inessa05 [86]

The procedure, which can be used to determine more accurately the concentration of the unknown acid is TO BACK-TITRATE WITH ADDITIONAL HYDROCHLORIC ACID TO NEUTRALIZE THE ADDITIONAL SODIUM HYDROXIDE THAT WAS ADDED.
Monoprotic acids are acids that can donate only one proton per each molecule and they have only one equivalence point. Examples of monoprotic acids are HCI, HNO3 and CH3COOH.
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