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Shkiper50 [21]
3 years ago
9

6th grade science i mark as brainliest​

Chemistry
2 answers:
kiruha [24]3 years ago
7 0

Answer:

it would be 5 i think

Explanation:

cuz 50 divided by 10 !

cluponka [151]3 years ago
4 0
Option b would be correct
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PLS HELPP FIRST TO BE CORRECT WILL GIVE BRANLIEST!!
Setler [38]

Answer:

BaF2 + Na2S → BaS2 + <u>2</u>NaF (balanced equation)

8 0
3 years ago
A sample of a compound containing only carbon and hydrogen was burned to produce 1.36g of water and 5.22g of carbon dioxide. Cal
Advocard [28]

Answer:

C_4H_5

Explanation:

Hello!

In this case, since the combustion analysis provides us the yielded mass of both water and carbon dioxide, as the sources of hydrogen and carbon in the hydrocarbon, we are able to compute the moles of each via the following mole-mass relationships:

n_H=1.36gH_2O*\frac{1molH_2O}{18.02gH_2O}*\frac{2molH}{1molH_2O}=0.151molH\\\\n_C=5.22gCO_2*\frac{1molCO_2}{44.01gCO_2}*\frac{1molC}{1molCO_2}=0.119molC

Now, we divide those moles by the fewest ones (those of carbon) in order to compute their subscripts in the empirical formula:

C: \frac{0.119}{0.119} = 1 \\\\H:\frac{0.151}{0.119} = 1.27

However we need whole numbers, that is why we multiply each subscript by 4 to get 4 for carbon and 5.08 ≅ 5 for hydrogen:

C_4H_5

Best regards!

8 0
3 years ago
What’re the answers?
nikdorinn [45]
7. A conclusion is an educated guess,
or, prediction, about what will happen after the experiment.

8. In observation we use all five senses to gather information.

9. In result we analyze and summarize and ask if the hypothesis was correct.

10. Something that changes or varies in an experiment is called variable.


Ans:
Conclusion
Observation
Results
Variable
3 0
3 years ago
If a tablet of acetaminophen, C8H9NO2, weighs 324 mg, how many moles are there in the tablet? If a tablet of acetaminophen, C8H9
Gnoma [55]

Answer:

2.14*10^{-3} mol

Explanation:

number of moles of C8H9NO2 = \frac{mass}{molar mass}=\frac{324*10^{-3} g}{151.163g/mol}=2.14*10^{-3}mol

The trick is to remember to convert milligrams to grams because molar mass is normally presented in grams per mole

7 0
3 years ago
Tell whether each is mass, volume, or density. Some may be used more than once
mash [69]
Search up the answer on safari it will be easy
5 0
2 years ago
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