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
Orlov [11]
3 years ago
12

Please show all work chemistry thanks 2,3 and 4

Chemistry
1 answer:
nikitadnepr [17]3 years ago
3 0

Answer: 2) 0.21 mole H2O

3) 0.50 mole K2O

4) 123 g Ca( NO3)2

Explanation: solution attached.

For number 2 to find the number of moles of H2O just divide the given in molecules with the Avogadro's number.

For 3 convert grams of K2O to moles by using 1 mole of K2O is equal to the molar mass of K2O

For number 4 moles to grams. Same process with number 3

You might be interested in
Using spdf notation, what is the electron configuration for a neutral atom of beryllium
kkurt [141]

Answer:

Beryllium

Explanation:

4 0
3 years ago
Enter a balanced equation for the reaction between solid silicon dioxide and solid carbon that produces solid silicon carbide an
givi [52]

Answer:

SiO2(s) + 3C(s)  ------> SiC(s) + 2CO(g)

Explanation:

The formula for silicon oxide is SiO2 and carbon is C. silicon carbide is SiC

and carbon monoxide is CO.

An arrow is always used to separate the reactants (left) and products (right).

A balanced equation must contain equal number of atoms in each side of the equation.

For example in the equation above, there are 1 atom of silicon appears on each side; 2 atoms of oxygen and three atoms of carbon.

3 0
3 years ago
Consider an ideal gas at 30 ∘C and 1.02 atm pressure. To get some idea how close these molecules are to each other, on the avera
Nastasia [14]

Answer: They are close to each other by 41.03 m^3

Explanation:

From Ideal gas equation, PV = nRT

Where n is negligible

R is gas constant = 8.314 J/mol.k

T = 30 + 273 = 303K

P = 1.02 * 103351.5 = 103351.5 Pascal

Then;

PV = RT

V = P/RT

V = 103351.5/(8.314*303)

V = 41.03m^3

8 0
3 years ago
Read 2 more answers
9. Which one of the following is not a potential effect of global warming?
valentina_108 [34]

Answer:

D. Increase in UV radiation​

Explanation:

I hope it helps. brainliest pls

5 0
2 years ago
The pH scale is called the logarithmic scale what does this mean?
Ratling [72]
A logarithmic scale is a nonlinear scale used when there is a large range of quantities
6 0
4 years ago
Other questions:
  • The combustion of 5.00 grams of c2h6(g), at constant pressure releases 259 kj of heat. what is δh for the reaction: 2c2h6(g) + 7
    12·1 answer
  • What is the morality of a 750.0 milliliter solution containing 2.5 miles of solute??
    6·1 answer
  • What salt is produced in hn o 3 (aq) koh(aq)→ h 2 o(l) ?
    11·1 answer
  • What will be the volume of a gas sample at 331 K if its volume at 371 K is 14.8 L?
    5·1 answer
  • What is the mass of 19.5g
    14·1 answer
  • a. Choose the best response for the following. The ionization energy for the chlorine atom is equal in magnitude to the electron
    7·1 answer
  • If 8.2 L of hydrogen gas at STP are produced in this<br> reaction, how many atoms of sodium react?
    13·1 answer
  • How do magnets move objects?​
    13·1 answer
  • 30 points please help
    7·1 answer
  • Help me!<br>I need some quick answers pls​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!