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
lana [24]
2 years ago
12

How many moles are in 68 grams of Mg(OH)

Chemistry
1 answer:
klemol [59]2 years ago
4 0

Answer:

1.16 mol

Explanation:

Given data:

Mass in gram Mg(OH)₂ = 68 g

Number of moles of Mg(OH)₂ = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of Mg(OH)₂ = 58.32 g/mol

By putting values,

Number of moles = 68 g/ 58.32 g/mol

Number of moles = 1.16 mol

You might be interested in
Which of the following is an anion?Al3+ Mg2+ O2– H Save
JulijaS [17]
An anion is an ion with a negative charge. The minus sign, when attached to the end of an ionic compound, indicates that this has a negative charge, while a plus sign indicates a positive charge. 

O2- is the only compound listed that satisfied this. It is the anion.
Answer is 02-
5 0
3 years ago
What makes it possible
docker41 [41]

Answer:

I think long roots

Explanation:

5 0
3 years ago
Read 2 more answers
What volume, in milliliters, of a 0.997 M KOH solution is needed to neutralize 30.0 mL of 0.0400 M HCl?
deff fn [24]

Answer:

1.2 mL

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated:

HCl + KOH —> KCl + H₂O

From the balanced equation,

Mole ratio of the acid, HCl (nₐ) = 1

Mole ratio of base, KOH (n₆) = 1

Finally, we shall determine the volume of the base, KOH needed to neutralize the acid, HCl as follow:

Molarity of base, KOH (M₆) = 0.997 M

Volume of acid, HCl (Vₐ) = 30 mL

Molarity of acid, HCl (Mₐ) = 0.0400 M

Volume of base, KOH (V₆) =?

MₐVₐ / M₆V₆ = nₐ/n₆

0.04 × 30 / 0.997 × V₆ = 1/1

1.2 / 0.997 × V₆ = 1

Cross multiply

0.997 × V₆ = 1.2

Divide both side by 0.997

V₆ = 1.2 / 0.997

V₆ = 1.2 mL

Thus, the volume of the base, KOH needed to neutralize the acid is 1.2 mL.

7 0
3 years ago
Based on your observations, which equation best models the reaction of vinegar (C2H4O2) and baking soda (NaHCO3)? Explain.
tensa zangetsu [6.8K]

Answer:  im in 8th they got me doin this

Explanation: i need help quick

8 0
3 years ago
Hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer indu
ddd [48]

<u>Answer:</u> The amount of heat released is 56 MJ.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}  

Given mass of C_2H_6 = 12 kg = 12000 g    (Conversion factor: 1 kg = 1000 g)

Molar mass of C_2H_6 = 30 g/mol

Putting values in above equation, we get:

\text{Moles of }C_2H_6=\frac{12000g}{30g/mol}=400mol

The chemical reaction for hydrogenation of ethene follows the equation:

C_2H_4+H_2\rightarrow C_2H_6

By Stoichiometry of the reaction:

When 1 mole of ethane releases 140 kJ of heat.

So, 400 moles of ethane will release = \frac{140}{1}\times 400=56000kJ of heat.

Converting this into Mega joules, using the conversion factor:

1 MJ = 1000 kJ

So, \Rightarrow 56000kJ\times (\frac{1MJ}{1000kJ})=56MJ

Hence, the amount of heat released is 56 MJ.

8 0
3 years ago
Other questions:
  • How many grams of testosterone, C19H28O2 (288.4 g/mol), must be dissolved in 299.0 grams of benzene to reduce the freezing point
    6·1 answer
  • What is dermal tissue
    14·2 answers
  • Which is NOT a phase of mitosis?
    6·2 answers
  • What is the percentage error of length measurement of 0.229cm if the correct value is 0.225cm
    9·2 answers
  • *Will mark the BRAINLIEST*
    13·1 answer
  • What volume will 2.04g of helium gas occupy at 100C and 1.13 atm?
    9·1 answer
  • Please help me..<br>what is carbon 1/12​
    5·1 answer
  • Bill is pushing a box with 10 N of force to the left, while Alice is pushing the box with 30 N of force to the right. What is th
    13·1 answer
  • Complete the conceptap below . About Chemical Bonds ​
    6·1 answer
  • Identify different hydro-meteorological hazards;
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!