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
velikii [3]
2 years ago
9

What is the molar mass of potassium carbide. Please show me how you worked this out

Chemistry
1 answer:
solmaris [256]2 years ago
7 0

Answer:

Answer. K2CO3 = 138 g/mol.

You might be interested in
A block of aluminum occupies a volume of 15.0 cm and weighs 40.5 g. What is its density?
mafiozo [28]

Answer:

2.7 g/cm^3

Explanation:

D = m/V

D = 40.5 g / 15 cm^3

D =  2.7 g/cm^3

7 0
3 years ago
How many moles of helium gas are contained in a 4.0 L flask at STP
Ratling [72]
First, you convert liters to moles. 
Usually you have to go to grams but this is STP.

Get moles directly by dividing the 4 by STP (22.4)
\frac{4}{22.4} =0.17857142857
About 1.8*10^{-1} or 0.18 moles whichever your teacher prefers

3 0
3 years ago
Derek needs a tool that delivers 25.00 mL of a sodium hydroxide solution. What tool would be best for him to use?
3241004551 [841]
He may use a pipette with a volume greater than 25 ml to transfer the solution.
4 0
3 years ago
What is the general trend for valence electrons as you go across the periodic table left to right
Margarita [4]
The atomic radius decreases across a period from left to right and increases down a given group. The atoms with the largest atomic radii are located in group l and at the bottom of groups. Moving from left to right across a period, electrons are added one at a time to the outer energy shell. Hope this helps!
6 0
3 years ago
A 51.24-g sample of Ba(OH)2 is dissolved in enough water to make 1.20 liters of solution. How many mL of this solution must be d
g100num [7]

Answer:

0.40 L

Explanation:

Calculation of the moles of Ba(OH)_2 as:-

Mass = 51.24 g

Molar mass of Ba(OH)_2 = 171.34 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{51.24\ g}{171.34\ g/mol}

Moles= 0.2991\ mol

Volume = 1.20 L

The expression for the molarity is:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

Molarity=\frac{0.2991\ mol}{1.20\ L}=0.24925\ M

Thus,

Considering

Molarity_{working\ solution}\times Volume_{working\ solution}=Molarity_{stock\ solution}\times Volume_{stock\ solution}

Given  that:

Molarity_{working\ solution}=0.100\ M

Volume_{working\ solution}=1\ L

Volume_{stock\ solution}=?

Molarity_{stock\ solution}=0.24925\ M

So,  

0.100\ M\times 1\ L=0.24925\ M\times Volume_{stock\ solution}

Volume_{stock\ solution}=\frac{0.100\times 1}{0.24925}\ L=0.40\ L

<u>The volume of 0.24925M stock solution added = 0.40 L </u>

6 0
3 years ago
Other questions:
  • In a laboratory experiment, John uses a mesh to separate soil particles from water. Which technique of separation is he using?
    5·1 answer
  • The rigid layer of nonliving material that surrounds the cell of plants and other organisms is called the _____.
    12·2 answers
  • What subatomic particle(s) is/are located in the nucleus of the atom? (4 points)
    9·2 answers
  • What is the symbol, atomic number, atomic mass, # of protons, # of neutrons, # of electrons, ion charge for the beryllium ion?
    8·1 answer
  • A student measures the mass of a sample of a metallic element, M. Then the student heats the sample in air, where it completely
    12·1 answer
  • What is the process of convertingiborganic substances to nutritional organic substances through light or chemical energy by auto
    6·1 answer
  • Describe a covalent bond?
    15·1 answer
  • Plant cells have a cell wall instead of a cell membrane - true or false​
    15·1 answer
  • Please answer correctly !!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!
    15·1 answer
  • Which element in the list is the most reactive?<br><br> C<br><br> Ba<br><br> S<br><br> Cs
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!