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
JulijaS [17]
3 years ago
11

If 0.38 M of an aqueous solution of magnesium nitrate hexahydrate (Mg(NO3)2 ᐧ 6H2O) was prepared in the laboratory, how many mL

of the solution would you need to obtain 4.871 grams of this solute?
Chemistry
2 answers:
Rom4ik [11]3 years ago
4 0

Answer:

The correct answer is 49.994 ml (≅ 50 ml)

Explanation:

From the definition of molarity, we know that in a 0.38 M solution there are 0.38 mol of magnesium nitrate hexahydrate per liter of solution:

0.38 M= 0.38 mol / L

The first step to solve the problem is to convert the moles of solute to mass (in grams) by using the molecular weight of Mg(NO₃)₂.6H₂O.

Molecular weight of Mg(NO₃)₂.6H₂O= 256.41 g/mol (from the molar mass of the elements).

mass of Mg(NO₃)₂.6H₂O = 0.38 mol x 256.41 g/mol= 97.43 g

So, there are 97.43 g of Mg(NO₃)₂.6H₂O in 1 L of solution (1 L= 1000 ml). We need to know in <u>how many ml of this solution a mass of 4.871 g is contained</u>, so we write the relations and calculate x (in ml):

97.43 g Mg(NO₃)₂.6H₂O --------------------  1000 ml (= 1 L)

4.871 g Mg(NO₃)₂.6H₂O --------------------- x

x= 4.871 g x 1000 ml / 97.43 g= 49.994 ml

uranmaximum [27]3 years ago
3 0

Answer:

50 mL

Explanation:

Given data

  • Molar concentration (M): 0.38 M
  • Mass of solute: 4.871 g
  • Molar mass of the solute: 256.41 g/mol

We can find the required volume using the following expression.

M = mass of solute / molar mass of solute × liters of solution

liters of solution = mass of solute / molar mass of solute × M

liters of solution = 4.871 g / 256.41 g/mol × 0.38 mol/L

liters of solution = 0.050 L = 50 mL

You might be interested in
Which would be the best to neutralize a large acid spill in your school lab: sodium hydroxide or baking soda? Explain.
nadya68 [22]

Consider the acid spill. It is already starting to do nasty things to, say, the floor or counter. So you grab the bottle of 10% NaOH and pour some on the spill. All of a sudden, you get a great deal of heat, and you don't have any visual evidence whether your put on too little or too much. But you have added more liquid to the spill, generated more heat, and will get more damage. You have made a bigger mess, and if you added too much, you then have a neutralization problem to deal with.  

And if it is something like a strong sulfuric acid solution, adding sodium hydroxide solution will be extremely exothermic, and you could get some really nasty results.  

So now approach the spill with a handful of baking soda. You sprinkle it on the spill. It fizzes, and carbon dioxide is given off. That actually, in a very tiny way, moderates the temperature of the neutralization. And you can keep adding baking soda until the fizzing stops, and then perhaps some water to mix everything well. But what you have done is kept the volume to a minimum, added a neutralization agent that has a visible endpoint (no more gas being given off), and you don't suddenly have a huge amount of highly basic solution because you added too much.  

And what is also nice about baking soda is that you can toss some with your hand or even with a spoon, and get some distance from the spill. With a liquid, you have to get much closer

i hope this helped..

5 0
3 years ago
What Went Wrong – Balancing Chemical Equations
OLEGan [10]
1-It has to be 3 Fe and not Fe3.
2-The oxygens aren't balanced

Balanced equation:
3Fe+4H2O---->Fe3O4+4H2
4 0
3 years ago
What kind of energy involves the flow of positive charges
Eddi Din [679]
The kinda of energy the involves the flow of positive charge is Electrical

4 0
3 years ago
Read 2 more answers
Which mineral group dose copper belong ​
RideAnS [48]

Answer:

Native Elements; Metallic Elements

Explanation:

7 0
3 years ago
Which item takes the most amount of water to produce
____ [38]

Answer:

chocolate

Explanation:

chocolate is 17,196 litres per 1kg.

6 0
3 years ago
Read 2 more answers
Other questions:
  • How many valance electrons are in an Adam of each element in group 15 in the periodic table
    7·2 answers
  • What does the term "compound" mean? two or more substances dispersed in one another but each retaining their own identity. two o
    12·2 answers
  • What is included in each square (element) on the Periodic Table? I'm looking for four things
    7·1 answer
  • As the atomic number increases, the number of _ _, too.
    14·2 answers
  • I have no clue how to even start this, any help is appreciated!
    8·1 answer
  • Helllppp meee!! Please
    11·2 answers
  • Read the information about the halogen family.
    9·1 answer
  • Which element can form an oxide with the general formula m2o or mo where m is a metal
    9·1 answer
  • Từ một dung dịch có pH=7 muốn tạo thành dung dịch có pH nhỏ hơn 7 thì cho vào dung dịch
    11·1 answer
  • Determine the molar mass of a gas that moves 1.25 times as fast as CO2.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!