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
dybincka [34]
3 years ago
12

How many moles of magnesium are needed to react with 16.0 g of O2?

Chemistry
1 answer:
Ulleksa [173]3 years ago
5 0

Answer:

1 mol of Mg

Explanation:

2Mg + O₂  → 2MgO

2 moles of magnesium react with 1 mol of oxygen, to produce 2 mol of magnesium oxide.

16 g / 32 g/m = 0.5 moles of O₂

If 1 mol of oxygen react with 2 mol of Mg

0.5 moles of O₂ will react with 1 mol of Mg. (0.5 ₓ2)

You might be interested in
Question 2 of 19
Alborosie

Answer:

D

Explanation:

The temperature increases

3 0
2 years ago
Which of the following is true about metallic bonding?
Anna [14]

Answer:

I think the answer is option B

8 0
3 years ago
Read 2 more answers
How do you work out question 1a?
Sliva [168]

Answer:

-125 kJ

Explanation:

You calculate the energy required to break all the bonds in the reactants. Then you subtract the energy to break all the bonds in the products.

                     H₂C=CH₂   +    H₂ ⟶    H₃C-CH₃

Bonds:       4C-H + 1C=C     1H-H     6C-H + 1C-C

D/kJ·mol⁻¹:  413       612        436       413      347

The formula relating ΔHrxn and bond dissociation energies (D) is

ΔHrxn = Σ(Dreactants) – Σ(Dproducts)

(Note: This is an exception to the rule. All other thermochemical reactions are “products – reactants”. With bond energies, it’s “reactants – products”. The reason comes from the way we define bond energies.)

<em>For the reactant</em>s:

Σ(Dreactants) = 4 × 413 + 1 × 612 + 1 × 436 = 2700 kJ

<em>For the products:</em>

Σ(Dproducts) = 6 × 413 + 1 × 347 = 2825 kJ

<em>For the system</em> :

ΔHrxn = 2700 - 2825 = -125 kJ

4 0
3 years ago
For two variables in a direct proportion, what is the result of doubling one variable?
Airida [17]

Answer:

the other variable is also doubled

Explanation:

direct proportion, same thing has to happen to both variables

6 0
3 years ago
Are your knees the elbows of your legs or are your elbows the knees of your
Nimfa-mama [501]

Answer:

hi

Explanation:

it is confusing lol

but i think that it is C.both

hope it helps

have a nice day

5 0
3 years ago
Read 2 more answers
Other questions:
  • If given 5.98 x 10^24 atoms of Copper, how many kilograms do you have?
    11·1 answer
  • If an atom gains or loses an electron it tends to become what?
    13·2 answers
  • The nucleus of an atom consists of
    10·2 answers
  • How many moles of SnF₂ will be produced along with 48 grams of H₂? *
    9·1 answer
  • 1 Point
    10·1 answer
  • What is similar about the atomic structure of the copper isotopes?
    12·1 answer
  • 1. The Rast method for determining molar masses uses camphor as the solvent. Camphor melts at 178.4 °C, and its large Kf (37.7 K
    11·1 answer
  • Explain why the process of dissolution can be exothermic or endothermic (heat of solution) with different solutes
    10·1 answer
  • The ester of honey and the test ​
    13·1 answer
  • A 25 kg rock is placed in a graduated cylinder with water.the volume of the fluid is 18.3ml.calculate the density of the rock in
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!