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
pentagon [3]
3 years ago
6

The atomic mass and abundance of Cr-50 is 49.946 amu and 4.3%. The atomic mass and abundance of Cr-52 is 51.941 amu and 83.8%. T

he atomic mass and abundance of Cr-53 is 52.941 amu and 9.5%. The atomic mass and abundance of Cr-54 is 53.939 amu and 2.4%. Which is the average atomic mass of chromium?
a. 53.94 amu
b. 52.19 amu
c. 52.00 amu
d. 51.94 amu
Chemistry
1 answer:
Sati [7]3 years ago
6 0
Multiply the mass by the abundance and add each. Make sure to convert the percentage into a decimal. (49.946 * .043) + (51.941 * .838) + (52.941 * .095) + (53.939 * .024) = 51.99 round up using sig figs and the answer is c. 52.00 amu
You might be interested in
Chromium(III) oxide reacts with hydrogen sulfide (H₂S) gas to form chromium(III) sulfide and water:
Vladimir79 [104]

From the stoichiometry of the reaction 214.71  g of H₂S is required.

The equation of the reaction is;

Cr₂O₃(s) + 3H₂S(g) ⟶Cr₂S₃(s) + 3H₂O(l)

Number of moles of Cr₂S₃ produced :

=  421 g/200 g/mol

= 2.105 moles

From the balanced reaction equation;

3 moles of H₂S produced 1 mole of Cr₂S₃

x moles of H₂S is required to produce 2.105 moles moles of  Cr₂S₃

x = 3 moles × 2.105 moles/1 mole

= 6.315 moles of H₂S

Hence;

Mass of H₂S required

= 6.315 moles of H₂S × 34 g/mol

=214.71  g

What is the molar mass?

The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10²³ atoms, molecules, or formula units of that substance.

Is molar mass and atomic mass same?

Molar mass is the mass of the one mole of the compound whereas atomic mass is the mass of the individual unit of the compound. Basically, molar mass is the mass of an average of many elements of the compound and atomic mass is the mass of the atom.

Learn more about stoichiometry  reaction :

brainly.com/question/16060223

#SPJ4

5 0
2 years ago
Calculate the volume of 4.00 molar NaOH solution required to prepare 100 mL of a 0.500 molar solution of NaOH.
Kazeer [188]

Answer:

The answer to your question is V₁ = 12.5 ml

Explanation:

Data

Volume = V₁?

[NaOH] = C₁ = 4.0 M

Volume 2 = V₂ = 100 ml

[NaOH] = C₂ = 0.5 M

Formula of dilution

                             V₁C₁   =  V₂C₂

Solve for V₁ (original solution)

                                 V₁ = \frac{V2C2}{C1}

Substitution

                                V₁ = \frac{(0.5)(100)}{4}

Simplification

                                V₁ = \frac{50}{4}

Result

                                V₁ = 12.5 ml

7 0
3 years ago
Which is a nervous system test?
Elza [17]

Answer:

Sorry, is there supposed to be an attachment, If so kindly republish your Question.

3 0
3 years ago
Sayid recorded the temperatures of four substances in a chart. which conclusion is best supported by the data?
balandron [24]
The conclusion best supported by the data can either be high temperature, low temperature, and normal temperature. Since there are diverse substances included in the chart, It is expected to also have diverse temperatures. 
4 0
2 years ago
What is a small-ball shaped organelle that helps the cell break down nutrients and old cell parts.
Gemiola [76]
Lysosome: only ones that  break down old cell parts<span>
</span>
6 0
2 years ago
Other questions:
  • More than 70% of all legislation passed in Washington, DC addresses issues related to science; most of these issues pertain chem
    9·1 answer
  • The chemists is another name for the periodic table
    12·1 answer
  • What four properties are used to classify stars?
    10·1 answer
  • What happens to the rate of the reaction as temperature increases
    13·1 answer
  • How many times does the Moon rotate on its axis during a lunar month?
    12·1 answer
  • Ask me whats mangles gender. I will give yuh answer (Mangle is from fnaf)
    10·2 answers
  • (feso4.(Nh4) So4. 6H2o) +Kmno4+H2So4_Fe2(So4)3+K2So4+mnSo4+(Nh4)2So4+H2o​
    14·1 answer
  • Which statement is true about the law of reflection?
    5·1 answer
  • What scientist first developed an equation to calculate the wavelengths of lines in the emission spectrum of hydrogen atoms?.
    14·1 answer
  • A 75.0-liter canister contains 15.82 moles of argon at a pressure of 546.8 kilopascals. what is the temperature of the canister?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!