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
Mrac [35]
3 years ago
7

Dana wants to determine the molar mass of magnesium hydroxide, Mg(OH)2. Which calculation should she use?

Chemistry
2 answers:
AVprozaik [17]3 years ago
7 0

Answer:

C is correct

Explanation:

The molar mass is the total mass of a compound, that means, you need to add the mass of every single atom in the formula. In this case, you have one atom of Magnesium, two atoms of Oxygen and two atoms of Hydrogen, that is the reason why you need to multiply molar mass x 2 in the case of Oxygen and Hydrogen

aleksandr82 [10.1K]3 years ago
3 0
Answer C. is correct:

(molar mass of Mg) + (2 x molar mass of O) + (2 x molar mass of H)

:-) ;-)
You might be interested in
Reversible reaction and examples on them
Tomtit [17]

Answer:

Here are three examples  

Explanation:

In a reversible reaction, the conversions of reactants to products and of products to reactants occur at the same time.

Example 1

The reaction of hydrogen and iodine to from hydrogen iodide.  

H₂ + I₂ ⇌ 2HI

Example 2

The dissociation of carbonic acid in water to form hydronium and hydrogen carbonate ions

H₂CO₃ + H₂O ⇌ H₃O⁺ + HCO₃⁻

Example 3

The dissociation of dinitrogen tetroxide to nitrogen dioxide.

N₂O₄ ⇌ 2NO₂

4 0
3 years ago
You are given two aqueous solutions with different ionic solutes (Solution A and Solution B). What if you are told that Solution
klio [65]

Answer:

Yes, it is possible. Let us consider an example of two solutions, that is, solution A having 20 percent mass RbCl (rubidium chloride) and solution B is having 15 percent by mass NaCl or sodium chloride.  

It is found that solution A is having more concentration in comparison to solution B in terms of mass percent. The formula for mass percent is,  

% by mass = mass of solute/mass of solution * 100

Now the formula for molality is,  

Molality = weight of solute/molecular weight of solute * 1000/ weight of solvent in grams

Now molality of solution A is,  

m = 20/121 * 1000/80 (molecular weight of RbCl is 121 grams per mole)

m = 2.07

Now the molality of solution B is,  

m = 15/58.5 * 1000/85

m = 3.02

Therefore, in terms of molality, the solution B is having greater concentration (3.02) in comparison to solution A (2.07).

5 0
3 years ago
What is the thinnest type of crust?
Trava [24]
The correct answer is oceanic crust, 80 km, Hope this helps let me know.
8 0
3 years ago
Two atoms of calcium and one molecule of oxygen gas react and yield two molecules of calcium oxide.
Vitek1552 [10]
2Ca + O2 ——————-> 2CaO2
3 0
3 years ago
A ball thrown across a football field is an example of a(n)
Cloud [144]

I don't know what you mean by the question, but in science it is Newton's second law.

"The second law explains how the velocity of an object changes when it is subjected to an external force."

I hope this helped!+*♡

7 0
3 years ago
Other questions:
  • when bisecting an angle, one of the steps is to draw an arc centered on a point on a ray of the angle. in particular this angle
    8·1 answer
  • You cannot round a number if it has a decimal point true or false
    14·1 answer
  • For the reaction N2(g)+O2(g)⇌2NO(g)N2(g)+O2(g)⇌2NO(g) classify each of the following actions by whether it causes a leftward shi
    12·1 answer
  • What is the most likely source of the carbon dioxide shown in the graph above?
    11·1 answer
  • PLEASE HELP ONLY ONE QUESTION
    11·2 answers
  • 2. The table shows the scientific names and the common names of four plants. Which word in their names shows that two of the pla
    13·1 answer
  • Explain why Cl, is an element and NOT a compound.
    14·2 answers
  • A student makes several observations about a piece of iron. Which observation describes a chemical property of the iron?
    12·1 answer
  • Calculate: Press Reset. Start with 1.900 × 10 24(or 19.00 × 10 23 ) molecules of Cu2O. A. Calculate the number of moles: B. Use
    13·1 answer
  • Choose all of the answers that describe beneficial microorganisms.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!