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defon
3 years ago
15

Freddie works at an amusement park making balloon animals and has always wondered why balloons can be twisted into shapes. Which

of the following is the
best explanation?
A The volume of a gas is constant
B. Particles of gas can be compressed
C. Volume is measured in two dimensions
D. Force changes the number of particles
Chemistry
1 answer:
Finger [1]3 years ago
6 0

Answer:D

Explanation:

Trust me

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3 years ago
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The nonvolatile, nonelectrolyte estrogen (estradiol), C18H24O2 (272.40 g/mol), is soluble in chloroform CHCl3.
Artist 52 [7]

<u>Answer:</u> The molarity of solution is 0.274 M and the osmotic pressure of the solution is 6.70 atm

<u>Explanation:</u>

To calculate the molarity of the solution, we use the equation:

\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}

We are given:

Given mass of estrogen = 13.5 g

Molar mass of estrogen = 272.40 g/mol

Volume of solution = 181 mL

Putting values in above equation, we get:

\text{Molarity of solution}=\frac{13.5\times 1000}{272.40\times 181}\\\\\text{Molarity of solution}=0.274M

Hence, the molarity of solution is 0.274 M

To calculate the osmotic pressure of the solution, we use the equation:

\pi=iMRT

where,

\pi = osmotic pressure of the solution = ?

i = Van't hoff factor = 1 (for non-electrolytes)

M = molarity of solute = 0.274 M

R = Gas constant = 0.0821\text{ L atm }mol^{-1}K^{-1}

T = temperature of the solution = 298 K

Putting values in above equation, we get:

\pi=1\times 0.274mol/L\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 298K\\\\\pi=6.70atm

Hence, the osmotic pressure of the solution is 6.70 atm

8 0
3 years ago
Which of the following factors affect the vapor pressure of a liquid? Check all that apply. View Available Hint(s) Check all tha
trasher [3.6K]

Answer:

Vapour pressure of liquid is affected by its TEMPERATURE, TYPE OF LIQUID, ADDITION OF SOLUTES.

Explanation:

Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid. Mathematically, the vapor pressure of liquid is written as:

In (Pvap) = -ΔHvap / R * (1/T) + C

ΔHvap is the enthalpy of vaporization and it is constant for specific liquid, T is the temperature and C is a constant. Temperature therefore affect the vapor pressure of a liquid as increase in temperature can cause an increase in vapor pressure.

The type of liquid also affect the vapor pressure. If the molecules bind to each other strongly in the liquid, it increases vapor pressure to be exerted by the liquid but if the type of liquid is one with weak forces of attraction, the vapor pressure is reduced.

Addition of solute to the liquid increases the boiling temperature of liquids thereby reducing it's vapor pressure.

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3 years ago
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lorasvet [3.4K]
Based on bond type, CaCI2 has the highest melting point.
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3 years ago
What is the net ionic equation for the reaction between aqueous solutions of na3po4 and cuso4?
agasfer [191]

Answer:

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Explanation:

Double displacement reaction: A chemical reaction in which aqueous solution of two salts react to give two products by exchanging their counterions.

<u>The chemical equation for the chemical reaction between Na₃PO₄ (aq) and CuSO₄ (aq) is given as:</u>

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<u>The full ionic equation for this chemical reaction is:</u>

6Na⁺(aq) + 2PO₄³⁻(aq) + 3Cu²⁺(aq) + 3SO₄²⁻(aq) → Cu₃(PO₄)₂ (s) + 6Na⁺(aq) + 3SO₄²⁻(aq)

<u>Therefore, the net ionic equation for this chemical reaction is:</u>

3Cu²⁺ + 2PO₄³⁻ → Cu₃(PO₄)₂ (s)

4 0
3 years ago
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