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
irina1246 [14]
3 years ago
15

A. CH,0, molar mass is 90 g/mol

Chemistry
1 answer:
Luba_88 [7]3 years ago
7 0

what is that i cant see anything?

You might be interested in
If oxygen is removed from a sample of air as iron nusts, what happens to the partial pressure of oxygen in the air?
trasher [3.6K]

Answer:

It increases because the less oxygen the more pressure there will be on that specific object

Explanation:

3 0
3 years ago
An iron nail rusts when exposed to oxygen. According to the following reaction, how many moles of iron(III) oxide will be formed
Zigmanuir [339]

Answer:

0.453 moles

Explanation:

The balanced equation for the reaction is:

2Fe(s) + 3O2(g)  ==>  2Fe2O3

From the equation,  mass of O2 involved = 16 x 2 x 3 = 96g

                                 mass of Fe2O3 involved = [(2x26) + 3 x 16] x 2

                                                                            = 100g

                Therefore 96g of O2 produced 100g of Fe2O3

                                  32.2g of O2 Will produce   100x32.2/96

                                                   = 33.54g of Fe2O3

Converting it to mole using   number of mole = mass/molar mass

but molar mass of Fe2O3 = 26 + (16 X 3)

                                           = 74g/mole

Therefore number of mole of 33.54g of Fe2O3 = 33.54/74

                                                                           = 0.453 moles

5 0
3 years ago
It _______ moving right now.
Arte-miy333 [17]

Answer:

Umm what do i do to help you??

7 0
2 years ago
Read 2 more answers
How many grams of Li are there in 1.39 moles of Li?
Ulleksa [173]

Answer:

6.941 grams

Explanation:

The molecular formula for Lithium is Li. The Si base unit for amount of substance is mole. 1 mole is equal to 1 moles Lithium, or 6.941 grams

5 0
3 years ago
Read 2 more answers
How many electrons would be in a calcium cation with a positive 2 charge?
kondor19780726 [428]

Number of electrons in a Ca²⁺ = 18

<h3>Further explanation  </h3>

In an atom there are levels of energy in the shell and sub shell  

This energy level is expressed in the form of electron configurations.  

Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub-shells in the shell of an atom, namely s, p, d and f. The maximum number of electrons for each sub shell is  

• s: 2 electrons  

• p: 6 electrons  

• d: 10 electrons and  

• f: 14 electrons  

Charging electrons in the sub shell uses the following sequence:  

<em>1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.  </em>

The element Ca has an atomic number of 20, so the number of electrons and protons (in neutral atoms) is also 20

Electron configuration of Ca : <em>1s², 2s², 2p⁶, 3s², 3p⁶, 4s² ⇒[Ar] 4s²</em>

When Ca releases 2 electrons to gain stability (forming Ca²⁺ cations), the number of electrons becomes:

\tt 20-2 = 18

and the electron configuration (Ca²⁺ ) becomes:

<em>1s², 2s², 2p⁶, 3s², 3p⁶</em>

<em />

6 0
2 years ago
Other questions:
  • How many electrons are present in 4He2+?
    14·1 answer
  • How many grams of Fe can be produced when 5.50 g of Fe2O3 reacts?
    14·1 answer
  • Which of these orbital filling diagrams are drawn correctly? (select all that apply)
    15·1 answer
  • Which molecule is amphoteric
    12·2 answers
  • A measure of the kinetic energy of particle motion within a substance is _____.
    15·2 answers
  • In examples where the volume of a system is under constant pressure, which of
    9·1 answer
  • What is the mass of cyclohexane solvent, in kg, if 9.76 mL are used and the cyclohexane has a density of 0.779 g/mL?
    11·1 answer
  • What is the atomic radius <br> of mercury?
    10·1 answer
  • YO SOMEONE ANSWER DIS ASAP I GOT 2 MINUTES
    12·1 answer
  • Question 3 of 10 Which two features are parts of a line graph? D A. A line of best fit B. Anx axis C. A dependent variable OD. A
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!