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
harina [27]
3 years ago
9

How many moles are in 395 grams of KMnO4 if the molar mass is 158 g/mole? please help me

Chemistry
1 answer:
Gala2k [10]3 years ago
8 0

Answer:

I have no idea

Explanation:

I don’t know

You might be interested in
The partial pressure of O2 in air at sea level is 0.21atm. The solubility of O2 in water at 20∘C, with 1 atm O2 pressure is 1.38
adell [148]

Answer:

1.21x10^{-3} M

Explanation:

Henry's law relational the partial pressure and the concentration of a gas, which is its solubility. So, at the sea level, the total pressure of the air is 1 atm, and the partial pressure of O2 is 0.21 atm. So 21% of the air is O2.

Partial pressure = Henry's constant x molar concentration

0.21 = Hx1.38x10^{-3}

H = \frac{0.21}{1.38x10^{-3} }

H = 152.17 atm/M

For a pressure of 665 torr, knowing that 1 atm = 760 torr, so 665 tor = 0.875 atm, the ar concentration is the same, so 21% is O2, and the partial pressure of O2 must be:

P = 0.21*0.875 = 0.1837 atm

Then, the molar concentration [O2], will be:

P = Hx[O2]

0.1837 = 152.17x[O2]

[O2] = 0.1837/15.17

[O2] = 1.21x10^{-3} M

7 0
3 years ago
How is a mixture such as a plate of pasta different from a mixture such as air
stealth61 [152]

Answer:

Well there is a lot of differences between the two. Its called homogeneous and Heterogeneous mixtures. Homogeneous mixtures are all the substances are evenly distributed throughout the mixture (salt water, air, blood).  Heterogeneous mixtures are the substances that are not evenly distributed (chocolate chip cookies, pizza, rocks). So Pasta with sauce and meatballs is heterogeneous and air is homogeneous




HOPE THIS HELPS HAVE A GREAT DAY!!~

Explanation:

6 0
2 years ago
Which of the following is the correct balanced equation for the reaction in which methane (CH4) burns in atmospheric oxygen (0₂)
Talja [164]

Answer: \text{CH}_{4}+2\text{O}_{2} \longrightarrow \text{CO}_{2}+2\text{H}_{2}\text{O}

Explanation:

The unbalanced equation is

\text{CH}_{4}+\text{O}_{2} \longrightarrow \text{CO}_{2}+\text{H}_{2}\text{O}

Balancing this equation, we get:

\boxed{\text{CH}_{4}+2\text{O}_{2} \longrightarrow \text{CO}_{2}+2\text{H}_{2}\text{O}}

8 0
2 years ago
What is the charge associated with each side of the HBr molecule?
nevsk [136]

Answer:

Partial positive on hydrogen and partial negative charge on oxygen atom

Explanation:

5 0
3 years ago
Write sentences that completely describe each of the chemical reactions shown in these skeleton equations. 11.1
Natasha2012 [34]
Please upload a photo of your question!
6 0
3 years ago
Other questions:
  • Based on its location on the periodic table, which element would be most likely to form a negative ion?
    13·2 answers
  • Which shows the loudest sound?
    13·1 answer
  • Identify each property below as more characteristic of a metal or a nonmetal.
    13·2 answers
  • List at least three properties of matter.
    13·2 answers
  • Gravitational force is stronger between objects with less mass.<br><br> True or false?
    15·1 answer
  • Electrical conductivity is an example of what property
    15·2 answers
  • The freezing point of diet soda is higher than the freezing point of regular soda, but lower than 0 degrees celcius, the freezin
    6·1 answer
  • A ________________ causes a __________________ heat transfer rate.
    7·1 answer
  • A reproducible measurement is an accurate one. A. True B. False
    11·2 answers
  • Helga has a box. She wants to determine how much the box can hold. Which measurement should she calculate?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!