1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nadezda [96]
3 years ago
9

A sample of hydrogen gas occupies 50.4 L at STP. This sample contains how many moles of hydrogen atoms

Chemistry
1 answer:
erik [133]3 years ago
8 0

Answer: 4.5

Explanation:

You might be interested in
What is the quantity of atoms in KMnO4 ?
tankabanditka [31]

Answer:

Potassium permanganate has a molar mass of 158.04 g/mol. This figure is obtained by adding the individual molar masses of <em><u>four oxygen atoms</u></em>, <em><u>one manganese atom</u></em> and <em><u>one potassium atom</u></em>

Explanation:

6 0
2 years ago
Read 2 more answers
What must happen for an igneous rock to form
Ksenya-84 [330]

Answer:

Igneous Rocks: form by crystallizing melted material (magma).

Explanation:

They can form either on the surface (extrusive igneous rocks), or deep in the crust (intrusive or plutonic igneous rocks).

4 0
2 years ago
Calculate the mass of O2 produced if 3.450 g potassium chlorate is completely decomposed by heating in presence of a catalyst (m
sergiy2304 [10]

The reaction is:

2 KClO3(s) → 3 O2(g) + 2 KCl(s) <span>

<span>A catalyst simply lowers the activation energy so MnO2 is not part of the overall reaction.

By stoichiometry: 

<span>3.45 g KClO3 x 1 mol/ 122.55g KClO3 x 3 mol O2/ 2 mol KClO3 x 31.99g/ 1 mol O2 = 331.096/ 245.1 = 1.35 grams O2 produced 

Answer:
1.35 grams O2</span></span></span>
3 0
3 years ago
What is the mass in grams of 4.30 moles of al??
anygoal [31]
It is 116.0206134 I guess
5 0
3 years ago
25.0 g of barium hydroxide is dissolved in 120.0g of water. What is the morality?
Vinvika [58]
Molarity: M = #moles of solute / liters of solution

# moles = mass / molar mass

Molar mass calculation

Barium hydroxide = Ba (OH)2

Atomic masses
Ba = 137.4 g/mol
O=16 g/mol
H=1 g/mol
Molar mass of Ba (OH)2 = 137.4 g/mol + 2*16g/mol + 2*1 g/mol = 171.4 g/mol

# mol = 25.0g/171.4 g/mol = 0.146 mol

For the volume of water use the fact that the density is 1g/ml., so 120 g = 120 ml = 0,120 liters.

M = 0.146mol / 0.120 liters = 1.22 mol/liter
3 0
3 years ago
Other questions:
  • Within the atmosphere as the altitude increases?
    10·2 answers
  • Which property is not characteristic of a metal?
    12·2 answers
  • Which SI units can be used to describe an object’s volume?
    15·1 answer
  • Select the correct statement below:
    12·1 answer
  • What would be the formula for an alkane which contains 30 hydrogen atoms? C__H30 16 18 14 15
    9·2 answers
  • Iron that is tin-plated does not rust. Why not?
    15·2 answers
  • How many grams of Na2SO4 are required to make 0.30 L of 0.500 M Na2SO4?
    14·1 answer
  • Determine the mass of 10.55 x 1029 molecules of cadmium chloride, CdCl,().
    12·1 answer
  • There is a series of nitrogen oxides with the general formula N?O?. What is the empirical formula of one that contains 30.45% ni
    8·1 answer
  • The chemical reaction
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!