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OleMash [197]
2 years ago
12

Which statement is true of diffusion?

Chemistry
1 answer:
raketka [301]2 years ago
4 0

Answer:

Molecules move from areas of high concentration to areas of low concentration.

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What is Gallium Sulfide(Ga2S3).<br> Ionic or Covalent?
mrs_skeptik [129]
The answer is Covalent







6 0
3 years ago
Amy is in a car moving quickly toward a stationary siren. Just as Amy moves
sineoko [7]

Answer:

Pitch

Explanation:

5 0
3 years ago
Acetone (fingernail-polish remover) has a density of 0.7857 g/cm3 What is the mass in grams of 17.16 mL of acetone?
Mashutka [201]
1 mL = 1 cm³

D = m / V

0.7857 = m / 17.16

m = 0.7857 x 17.16

m = 13.482 g
8 0
3 years ago
PLEASE HELP!!!
trasher [3.6K]

Answer:

(a) oxygen

(b) 154g (to 3sf)

(c) 79.9% (to 3sf)

Explanation:

mass (g) = moles × Mr/Ar

note: eqn means chemical equation

(a)

moles of P = 84.1 ÷ 30.973 = 2.7152 moles

moles of O2 = 85÷2(16) = 2.65625 moles

Assuming all the moles of P is used up,

moles of O2 / moles of phosphorus = 5/4 (according to balanced chemical eqn)

moles of O2 required = 5/4 × 2.7152moles = 3.394 moles (more than supplied which is 2.65625moles)

therefore there is insufficient moles of O2 and the limiting reactant is oxygen.

(b)

moles of P2O5 produced

= 2/5 (according to eqn) × 2.7152

= 1.08608moles

mass of P2O5 produced

= 1.08608 × [ 2(30.973) + 5(16) ]

= 154.164g

= approx. 154g to 3 sig. fig.

(c)

% yield = actual/theoretical yield × 100%

= 123/154 × 100%

= 79.870%

= approx. 79.9% (to 3sf)

4 0
3 years ago
Most enzymes work best at 37C because at lower and higher temperatures, the conditions are not optimal for their performance. Ex
finlep [7]

That's because the solubility

  • Temperature is directly proportional to solubility

Higher the solubility higher the temperature

Lower the temperature lower the solubility

So

Less temperature makes enzymes work faster

3 0
2 years ago
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