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3 years ago

PLEASE ANSWER ABY OF THESE YOU KNOW. Thank you!!!

1 answer:

7 0

1. Pressure decreases with increasing volume as the increased volume increases space for molecules to move around, thus decreasing the collisions and decreasing pressure.
2. A has a higher pressure given that the higher the n value, or moles present, the higher the pressure will be if everything else is held constant.
3. Gases have weaker intermolecular forces than liquids and solids.
4. Pressure must be 1/2, or 0.5 as PV=k, (P)(4)=(2), (P)=(2/4)
5. 2.25 L
6. Increasing space will decrease collisions and vice versa
7. 1122 2L bottles
8. 2.35 L
9. 2.1428 L
10. It would expand as they are directly proportional
11. 2.14959 L
12. 546K
13. .003663 atm`K
14. If pressure and temperature are directly proportional, then they increase or decrease at a constant rate
15. quadruples as they are directly proportional
16. 18.9963587 atm
Sorry hun, I gotta go. Good luck!

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A pile of Mgo dust is known to contain 2.082 mol. How many molecules are there?

nlexa [21]

Every one mol of MgO is 6.022 x 10^23 molecules (Avogado’s Number) So, you multiply 2.082 mol of MgO with 6.022 x 10^23 molecules. Hope this helps!

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2 years ago

A box has dimensions 0.2 mx 0.4 m x 0.6 m. What is the

AnnyKZ [126]

Answer:

$V=0.048m^3$

Explanation:

Hello,

In this case, since the volume is computed by multiplying the given dimensions as follows:

$V=0.2m*0.4m*0.6m$

The result is shown in cubic meters since each meter is also added:

$V=0.048m^3$

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3 years ago

A 25.888 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 73.464 g of wa

brilliants [131]

Answer:

Weight % of NH₃ in the aqueous waste = 2.001 %

Explanation:

The chemical equation for the reaction

$\\\\NH_3} + HCl -----> NH_4Cl$

Moles of HCl = Molarity × Volume

= 0.1039 × 31.89 mL × $\frac{1 \ L}{1000 \ mL}$

= 0.0033 mole

Total mass of original sample = 25.888 g + 73.464 g

= 99.352 g

Total HCl taken for assay = $\frac{10.762 \ g}{99.352 \ g}$

= 0.1083 g

Moles of NH₃ = $\frac{0.0033 \ mol}{0.1083}$

= 0.03047 moles

Mass of NH₃ = number of moles × molar mass

Mass of NH₃ = 0.03047 moles × 17 g

Mass of NH₃ = 0.51799

Weight % of NH₃ = $\frac{0.51799 \ g}{25.888 \ g} * 100%$ %

Weight % of NH₃ in the aqueous waste = 2.001 %

4 0

3 years ago

Definition of gravity

Andrew [12]

Answer:

the force that attracts a body toward the center of the earth, or toward any other physical body having mass.

Explanation:

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3 years ago

5. How can you tell the difference between CuS and Cu2S

puteri [66]

Answer:

Density, melting point. and magnetic properties

Explanation:

I can think of three ways.

1. Density

The density of Cu₂S is 5.6 g/cm³; that of CuS is 4.76 g/cm³.

It should be possible to distinguish these even with high school equipment.

2. Melting point

Cu₂S melts at 1130 °C (yellowish-red); CuS decomposes at 500 °C (faint red).

A Bunsen burner can easily reach these temperatures.

3. Magnetic properties

You can use a Gouy balance to measure the magnetic susceptibilities.

In Cu₂S the Cu⁺ ion has a d¹⁰ electron configuration, so all the electrons are paired and the solid is diamagnetic.

In CuS the Cu²⁺ ion has a d⁹ electron configuration, so all there is an unpaired electron and the solid is paramagnetic.

A sample of Cu₂S will be repelled by the magnetic field and show a decrease in weight.

A sample of CuS will be attracted by the magnetic field and show an increase in weight.

In the picture below, you can see the sample partially suspended between the poles of an electromagnet.

6 0

3 years ago