Ask question

Ask question

All categories

2 years ago

15

Helppppppp is due for tomorrow

2 answers:

Zielflug [23.3K]2 years ago

6 0

The right answer is B

Effectus [21]2 years ago

4 0

I think the answer is B, they depend on heat from the sun to regulate their body temperature

You might be interested in

Please help mee!!!!

GREYUIT [131]

The meaning of observations to see small touch

6 0

2 years ago

Carbon-14 has a half-life of 5,730 years. In how many years will 120 grams of Carbon-14 decay to 15 grams? 11,460 years 17,190 y

erastova [34]

120 grams of Carbon-14 decays to 15 grams in 17,190 years.

7 0

3 years ago

For which one of the following is ΔHfo zero?

Vlada [557]

The answer is most likely C

6 0

2 years ago

Read 2 more answers

What 2 properties make capillary action possible

Natali5045456 [20]

Cohesion and adhesion

7 0

3 years ago

The molar mass of an unknown gas was measured by an effusion experiment. It was found that it took 60 s for the gas to effuse, w

Marizza181 [45]

Answer:

The molar mass of the gas is 44 g/mol

Explanation:

It is possible to solve this problem using Graham's law that says: Rates of effusion are inversely dependent on the square of the mass of each gas. That is:

$\frac{r_1}{r_2} =\frac{\sqrt{M_2} }{\sqrt{M_1} }$

If rate of effusion of nitrogen is Xdistance / 48s and for the unknown gas is X distance / 60s and mass of nitrogen gas is 28g/mol (N₂):

$\frac{X/48s}{X/60s} =\frac{\sqrt{M_2} }{\sqrt{28g/mol} }$

6,61 = √M₂

44g/mol = M₂

<em>The molar mass of the gas is 44 g/mol</em>

<em></em>

I hope it helps!

4 0

3 years ago