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
Serjik [45]
3 years ago
11

When you find a new source of information, why is it important to think for yourself about whether to use that source?

Chemistry
1 answer:
dybincka [34]3 years ago
7 0

Answer:

to make sure that the source is reliable.

Explanation:

because I am smart

You might be interested in
When heat is applied to 80 grams of CaCO3, it yields 39 grams of B. Determine the percentage of the yield.
EleoNora [17]

The question is incomplete, the complete question is:

When heat is applied to 80 grams of CaCO3, it yields 39 grams of CaO Determine the percentage of the yield.

CaCO3→CaO + CO2

<u>Answer:</u> The % yield of the product is 87.05 %

<u>Explanation:</u>

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} ......(1)

We are given:

Given mass of CaCO_3 = 80 g

Molar mass of CaCO_3 = 100 g/mol

Putting values in equation 1, we get:

\text{Moles of }CaCO_3=\frac{80g}{100g/mol}=0.8mol

For the given chemical reaction:

CaCO_3\rightarrow CaO+CO_2

By stoichiometry of the reaction:

If 1 mole of CaCO_3 produces 1 mole of CaO

So, 0.8 moles of CaCO_3 will produce = \frac{1}{1}\times 0.8=0.8mol of CaO

We know, molar mass of CaO = 56 g/mol

Putting values in above equation, we get:

\text{Mass of CaO}=(0.8mol\times 56g/mol)=44.8g

The percent yield of a reaction is calculated by using an equation:

\% \text{yield}=\frac{\text{Actual value}}{\text{Theoretical value}}\times 100 ......(2)

Given values:

Actual value of the product = 39 g

Theoretical value of the product = 44.8 g

Plugging values in equation 2:

\% \text{yield}=\frac{39 g}{44.8g}\times 100\\\\\% \text{yield}=87.05\%

Hence, the % yield of the product is 87.05 %

6 0
3 years ago
How many neutrons does element X have if its atomic number is 35 and its mass number is 76?
Nastasia [14]

Formula for calculation of neutrons is Mass number - atomic number, here values are given. By putting values in formula 76-35= 41. Number of neutrons 41

6 0
3 years ago
when the equation __ cu __h2so4 → __cuso4 __h2o __so2 is correctly balanced, what is the coefficient of cuso4?
schepotkina [342]
<span>1 Cu + 2 H</span>₂<span>SO</span>₄<span> = 1 CuSO</span>₄<span> + 2 H</span>₂<span>O + 1 SO</span>₂

Coefficient od CuSO₄ = 1

hope this helps!
7 0
3 years ago
What is the fundamental unit of surface water hydrology?
victus00 [196]
The answer to this great question is C.Watershed
3 0
3 years ago
How to make compound G<br> Can somebody give a detailed explanation?
kondor19780726 [428]
Its d duee thatsso easy bro
8 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the percent by mass of carbon in CO2 (carbon dioxide). Please show all work.
    7·1 answer
  • Coffee is a solution of organic substances in water
    13·1 answer
  • What are insulated foam cups most likely made out of? polyethylene polystyrene nylon thread vulcanized rubber
    5·2 answers
  • Which conversion factor should you use first to calculate the number of grams of co2 produced by the reaction of 50.6 g of ch4 w
    15·1 answer
  • What exactly does the 2+ mean on element Fe2+?
    10·1 answer
  • How many moles of mercury atoms are in 5.418 x 1023 atoms of mercury? moles
    9·2 answers
  • guys im morgz im going to put a nail on the seat in my mom room and im going to see how up her a- s s it will go lets see
    10·1 answer
  • If a mixture contains 75% of one compound and 25% of its enantiomer, what is the e.e. of the mixture
    7·1 answer
  • Science help please 20 points
    6·2 answers
  • GOOD MORNING GUYS☕☕☕☕​
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!