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
Otrada [13]
3 years ago
8

What is the mass of 4.40 moles of magnesium chloride, MgCl2?

Chemistry
1 answer:
Darya [45]3 years ago
3 0
Since the number of moles of a substance is the mass divided by the molar mass of the substance, we can just simply multiply the molar mass of magnesium chloride by the number of moles, which is 4.40 in this case.

To find the molar mass, refer to the periodic table for the relative atomic mass of Mg and Cl and add them together. Since there’s 2 chloride ions in MgCl2, double the relative atomic mass of Cl when adding.

24.31 + 35.45x2
=95.21

Now just multiply 95.21 to 4.40mol, which you’ll get 418.9g (corrected to 3 significant figures)
You might be interested in
Find change H for the reaction as it occurred in the calorimeter.
dimaraw [331]
Delta H = q / mass * delta temperature
3 0
3 years ago
What are atoms made of
Olegator [25]
Protons, neutrons, and electrons.
7 0
3 years ago
Read 2 more answers
calculate the volume occupied by 10g of propane gas, under normal conditions of temperature and pressure
andriy [413]

Answer:

5.5 L

Explanation:

First we <u>convert 10 g of propane gas</u> (C₃H₈) to moles, using its <em>molar mass</em>:

  • 10 g ÷ 44 g/mol = 0.23 mol

Then we <u>use the PV=nRT formula</u>, where:

  • P = 1 atm & T = 293 K (This are normal conditions of T and P)
  • n = 0.23 mol
  • R = 0.082 atm·L·mol⁻¹·K⁻¹
  • V = ?

1 atm * V = 0.23 mol * 0.082 atm·L·mol⁻¹·K⁻¹ * 293 K

  • V = 5.5 L
3 0
3 years ago
How many protons are in an atom of strontium?
Stells [14]

Answer:

38

Explanation:

Symbol: Sr

Atomic mass: 87.62 u

Electrons per shell: 2,8,18,8,2

Atomic number: 38

Electron configuration: [Kr] 5s2

Van der Waals radius: 255 pm

Valence electrons: two

7 0
3 years ago
What is the volume of one mole of any gas at STP?
Vikki [24]
The volume of one mole of any gas at Standard Temperature and Pressure (1 atm and 0 degrees Celsius [273K]) is 22.4 L.
7 0
3 years ago
Other questions:
  • Which statement is true about writing chemical formulas of covalent compounds?
    6·2 answers
  • The molecular structure of water contains two atoms of hydrogen and one atom of oxygen. When water reaches its boiling point and
    11·1 answer
  • A sample of seawater contains 1.3 g of calcium ions in 3,100 kg of solution. what is the calcium ion concentration of this solut
    5·1 answer
  • A 1300 mL sample of gas with a molar mass of 71.0 g/mol at STP has what density?
    9·1 answer
  • Polypeptides are synthesized from amino acid building blocks. The condensation reaction between the growing polypeptide chain an
    13·1 answer
  • How can I calculate the mass percent of carbon, nitrogen and oxygen in acetamide, C2H5NO?
    12·1 answer
  • Potassium (K) combines with magnesium bromide (MgBr2) to form potassium bromide (KBr) and magnesium (Mg) during a chemical react
    15·1 answer
  • When a certain nuclide undergoes alpha emission, astatine-217 is produced. What is the identity of the nuclide that underwent de
    7·1 answer
  • Is cake ingredients (before blending) a mixture or solution​
    6·1 answer
  • Ay
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!