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
tino4ka555 [31]
3 years ago
10

A chemist uses hot hydrogen gas to convert chromium(III) oxide to pure chromium. How many grams of hydrogen are needed to conver

t 76
grams of chromium(III) oxide, Cr203?
Cr2O3 + H2Cr + H2O
Chemistry
1 answer:
Likurg_2 [28]3 years ago
8 0

Answer:

3.0242 g of H2

Explanation:

The balanced equation for the reaction is given as;

Cr2O3 + 3H2 → 2Cr + 3H2O  

From the reaction, the mole ratio between Cr2O3 and H2 is given as;

1 mol of Cr2O3 reacts with 3 mol of H2

Converting to mass using;

Mass = Molar mass * Number of moles

Cr2O3;

Mass = 151.99 g/mol * 1 mol = 151.99 g

H2;

Mass = 2.016 g/mol * 3 mol = 6.048 g

How many grams of hydrogen are needed to convert 76  grams of chromium(III) oxide, Cr203?

151.99 = 6.048

76 = x

x = 76 * 6.048 / 151.99

x = 3.0242 g

You might be interested in
What is combination reaction and also define it's properties?​
tigry1 [53]

Answer:

This is when two or more compounds or elements react to form a single product.

In these reactions new substances are produced or synthesized.

in simple terms the elements or compounds are converted to something new.

5 0
3 years ago
Read 2 more answers
Which of the following statements is true?
Anna007 [38]

Answer:

C. Lithium is most easily oxidized of the metals listed on the activity series and therefore it will most easily give electrons to metal cations

Explanation:

"Lithium" is a type of alkali metal that has a "single valence electron." Since it is a reactive element, it easily gives up an electron when it is combined with other elements. Such giving up of electron is meant to create compounds or bonds.

Among the common metals listed, "lithium" is the most easily oxidized. This means that it donates its electrons immediately. Such combination makes it exist as a<em> "cation"</em> or <em>"positively-charged."</em>

So, this explains the answer.

6 0
3 years ago
Which statement describes the location of metalloids on the periodic table? The metalloids are located below metals and above no
Talja [164]
The metalloids are Boron, Silicon, Geranium, etc and are found to the right of the metals and the left of the nonmetals. Since that is not an option, the best choice would be: The metalloids are located below nonmetals and above metals within a group.
4 0
4 years ago
Read 2 more answers
Nitrogen and hydrogen combine to form ammonia.
zhenek [66]

The balanced chemical equation for the formation ammonia is

    N2(g) + 3H2(g)  ----> 2NH3(g)  .        

The balanced chemical equations explains that the same number of each element exist as reactants and products.  The coefficients in a balanced equation must be the simplest whole number ratio. Mass is always conserved in chemical reactions.

For the formation of ammonia, the chemical equation is

     N2(g) + H2(g)  ----> NH3(g)

Balancing the chemical reaction, we can write,

  N2(g) + 3H2(g)  ----> 2NH3(g)  .  

This equation shows two nitrogen entering the reaction together and two hydrogens entering the reaction together. Since NH3 is multiplied by a coefficient of 2 there are now 2 nitrogen and 6 hydrogens. The 6 hydrogens come from the 2 multiplied by the subscript of 3. This is the balanced chemical reaction.

To learn more about Balanced chemical equation please visit:

brainly.com/question/14072552

#SPJ4

6 0
1 year ago
The cellular process that breaks down glucose to produce energy is______.
Bess [88]
Cellular respiration
6 0
4 years ago
Read 2 more answers
Other questions:
  • Which of the following correctly describes the relationship between speed and velocity?
    10·1 answer
  • Does the energy go from the surrounding to the chemicals or from the chemicals to the surround in an exothermic reaction?
    6·1 answer
  • In the soap testing experiment, what is the purpose of adding some MgCl2 to the soap solution at the end?
    5·1 answer
  • Which of the following is an example of a decomposition reaction
    11·1 answer
  • Who arranged the periodic table according to atomic mass
    5·1 answer
  • How can chemical symbols prove that cubic zirconia is not a diamond?
    7·2 answers
  • What is the weight in grams of 3.36 x 10^23 molecules of Copper Sulfate?
    11·1 answer
  • A student is studying the rate of the following reaction: C2H4O NaOH --&gt; H20 NaC2H3O Knowing that this is an exothermic react
    10·1 answer
  • You measure an unknown substance with litmus paper and determine it to be a strong acid.
    15·1 answer
  • Help plz I need it as soon as possible
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!