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
photoshop1234 [79]
3 years ago
6

What is the weight of:

Chemistry
1 answer:
Dafna11 [192]3 years ago
8 0

Answer:

Oxygen = 15.999 g/mol

Iron = 3 × 55.845 = 167.535 g/mol

CaCO3 = 20 × 100.0869 = 2001.738 g/mol

You might be interested in
Driving cars lowers the pH of the oceans by _______.
Naddika [18.5K]
A) releasing CO2 that dissolves and forms acid in the oceans (i think i'm sorry if its wrong)
6 0
3 years ago
Read 2 more answers
Enter your answer in the provided box. Calculate the number of moles of CrCl, that could be produced from 49.4 g Cr202 according
Mrrafil [7]

Answer:

0.4694 moles of CrCl₃

Explanation:

The balanced equation is:

Cr₂O₃(s) + 3CCl₄(l) → 2CrCl₃(s) + 3COCl₂(aq)

The stoichiometry of the equation is how much moles of the substances must react to form the products, and it's represented by the coefficients of the balanced equation. So, 1 mol of Cr₂O₃ must react with 3 moles of CCl₄ to form 2 moles of CrCl₃ and 3 moles of COCl₂.

The stoichiometry calculus must be on a moles basis. The compounds of interest are Cr₂O₃ and CrCl₃. The molar masses of the elements are:

MCr = 52 g/mol

MCl = 35.5 g/mol

MO = 16 g/mol

So, the molar mass of the Cr₂O₃ is = 2x52 + 3x35.5 = 210.5 g/mol.

The number of moles is the mass divided by the molar mass, so:

n = 49.4/210.5 = 0.2347 mol of Cr₂O₃.

For the stoichiometry:

1 mol of Cr₂O₃ ------------------- 2 moles of CrCl₃

0.2347 mol of Cr₂O₃----------- x

By a simple direct three rule:

x = 0.4694 moles of CrCl₃

6 0
3 years ago
The decomposition of nitrogen dioxide is described by the following chemical equation: Suppose a two-step mechanism is proposed
Mandarinka [93]

Answer:

<u>first step </u>

NO2(g)  ------------------------------------> NO(g) + O(g)

<u>second step</u>

NO2(g) + O(g) -----------------------------> NO(g) + O2(g)

Explanation:

<u>first step </u>

NO2(g)  ------------------------------------> NO(g) + O(g)

<u>second step</u>

NO2(g) + O(g) -----------------------------> NO(g) + O2(g)

8 0
3 years ago
Maggie is sitting at a table wit Fred and Florence.Maggie has 10 markers but Fred and Florence each have only 7 markers.how can
Dima020 [189]

Answer:

Give them each one so all of you is 8

Explanation:

I hope it helps:)

6 0
3 years ago
Read 2 more answers
When you connect your evidence to your claim you are using your
trapecia [35]

Answer:

2. reasoning

Explanation:

PLS GIVE BRAINLIEST

3 0
2 years ago
Other questions:
  • Thiamine (vitamin B1) deficiency diseases have a lower prevalence now than in the past. However, they are seen as beriberi in so
    12·1 answer
  • How can water be used for energy ?
    11·2 answers
  • The polarity of the water molecule aids in dissolving compounds. This is demonstrated by all but which statement?A)The water mol
    6·2 answers
  • Which of these best describes the role of plants in the carbon-oxygen cycle? A. to absorb carbon dioxide from the atmosphere and
    5·2 answers
  • The of the ocean floor would be the hardest to recover the cargo from.
    11·1 answer
  • The electron configuration for chromium is 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 5 4 s 1 instead of 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3
    10·2 answers
  • Aerosol cans have a label that warns the user not to use them above a certain temperature and not to dispose of them by incinera
    10·1 answer
  • What form of energy does a glue gun produce when turned on?​
    8·1 answer
  • An equilibrium mixture of N2, O2and NO gases at 1500K is determined to consist of 6.4 x 10-3Mof N2, 1.7 x 10-3M O2, and 1.1 x 10
    8·1 answer
  • HNO3(aq)+H2S(s)&gt; Ss)+ NO(g)+H2O(l)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!