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
Tanya [424]
3 years ago
13

The accepted value for the percent by mass of water in a hydrate is 36.0%. In a laboratory activity, a student determined the pe

rcent by mass of water in the hydrate to be 37.8%. What is the percent error for the student's measured value?
(1) 5.0% (3) 1.8%

(2) 4.8% (4) 0.05%
Chemistry
1 answer:
valentina_108 [34]3 years ago
4 0
The original or accepted value for the percent by mass of water in a hydrate = 36%
Percen by mass of water in the hydrate determined by the student
in the laboratory = 37.8%
So the difference between the actual and the percent by mass in water determined by student = (37.8 - 36.0)%
             = 1.8%
So the percentage of error made by the student = (1.8/36) * 100 percent
                                                                             = (18/360) * 100 percent
                                                                             = ( 1/20) * 100 percent
                                                                              = 5 percent
So the student makes an error of 5%. Option "1" is the correct option.
You might be interested in
Help pleaseeeeeeeeeeeeeeeeeee
Nataly [62]

Answer:

1) Constructive Interference

2) Hits a surface and bounces back

3) Antinodes

7 0
3 years ago
Read 2 more answers
Using the “rule of 8” explain why carbon is the backbone of organic molecules
Sergeu [11.5K]

Answer:

Carbon has 4 valence electrons (electrons that are used in bonding), and therefore it can make 4 bonds which is the most one can (other than some exceptions, but in general it is the most). It wants to make 4 bonds so it can reach a full octet of 8 elections, hence the rule of 8.

Explanation:

8 0
2 years ago
Read 2 more answers
What happens when a solid compound dissolves in water?
IRINA_888 [86]
It becomes a liquid with the water

6 0
3 years ago
Read 2 more answers
If the lab technician needs 30 liters of a 25% acid solution, how many liters of the 10% and the 30% acid solutions should she m
Mice21 [21]

Answer:

7.5 L of the 10% and 22.5 L of the 30% acid solution, she should mix.

Explanation:

Let the volume of 10% acid solution used to make the mixture = x L

So, the volume of 30% acid solution used to make the mixture = y L

Total volume of the mixture = <u>x + y = 30 L .................. (1) </u>

For 10% acid solution:

C₁ = 10% , V₁ = x L

For 30% acid solution :

C₂ = 30% , V₂ = y L

For the resultant solution of sulfuric acid:

C₃ = 25% , V₃ = 30 L

Using  

C₁V₁ + C₂V₂ = C₃V₃

10×x + 30×y = 25×30

So,  

<u>x + 3y = 75 .................. (2) </u>

Solving 1 and 2 we get,

<u>x = 7.5 L </u>

<u>y = 22.5 L</u>

6 0
3 years ago
True or false: a physical property is a characteristic of matter that you cannot observe or measure without changing the identit
Ganezh [65]
That is false, hope this helps.
4 0
3 years ago
Other questions:
  • To squeeze a gas into a smaller space you
    5·1 answer
  • BALANCE. PCL3+H2O---H3PO3+HCL
    11·1 answer
  • What is the formula for an alkene containing six carbon atoms?
    15·1 answer
  • In the reaction C5H8+____ O2= 8H2O+5CO2
    10·1 answer
  • Petrolium is a mixture consisting mostly of​
    7·1 answer
  • Water is not a very good solvent. true or false
    6·1 answer
  • Unknown element X is a metal that ionically bonds to sulfur. Is the formula, X3S feasible? Why or why not?
    7·2 answers
  • Which statement about Niels Bohr’s atomic model is true?
    10·1 answer
  • Which phrase describes how metamorphic rocks form?
    9·2 answers
  • What volume of a 0. 100mhcl stock solution should be used to prepare 250. 00ml of 0. 0250mhcl?.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!