2 years ago

The number of grams of helium in a balloon at a pressure of 99.8 kPa, a temperature of 301 K, and a volume of 0.785 L would be

Chemistry

1 answer:

Tresset [83]2 years ago

3 0

Use formula
pV=nRT
in formula n=m/M
you have to find m

P=99.8/101.325
v=0.785
R=0.0821
T=301

You might be interested in

The electron configuration for an atom is 1s 2s 2p2. How many electrons does the atom have?

taurus [48]

Answer:

Four

Step-by-step explanation:

The superscripts in an electron configuration tell us how many electrons are in a subshell.

If the electron configuration is 1s¹ 2s¹2p², the total number of electrons is

1 + 1 + 2 = 4

The atom contains four electrons.

Note: this atom is in an excited state, because the 1s and 2s subshells can each hold one more electron.

7 0

3 years ago

Help help help plsss

Olin [163]

Answer:

4.58×10^3

3.72×10^7

Explanation:

3.8×10^2 =380

+ 4.2×10^3=4200

= 4580 = 4.58×10^3

8 0

2 years ago

Sodium is an inactive metal why

Sphinxa [80]

Answer:

Inactive metals are inert metals that doesn’t react with most of the chemicals.They are highly resistant to oxidation and corrosion when exposed to moisture.

Explanation:

7 0

2 years ago

A. If the mass of Hydrogen is 1 amu, what is the mass of Hydrogen in the reactant side of the equation above?

dimulka [17.4K]

Answer:

there are 4 hydrogen so

A.the mass of Hydrogen in the reactant side of the equation above is 1×4=4 amu.

B.the mass of Hydrogen on the product side of the equation above =1×4=4 amu.

Note: mass of reactant =mass of product.

7 0

2 years ago

How does energy change when you eat food?

iris [78.8K]

It changes to chemical energy

5 0

3 years ago