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ycow [4]
3 years ago
15

Answer both 8 and 9 will give u brain list with explanation as well so don’t just answer

Chemistry
1 answer:
goldfiish [28.3K]3 years ago
6 0

Answer:

8. the answer is B.

9. the answer is A.

Explanation:

Hello!

8. In this case, by bearing to mind that the limiting reactant is always completely consumed and the excess one remain as a leftover at the end of the reaction, we can also infer that as all the limiting reactant is consumed, it must determine the maximum amount of product as the excess reactant will hypothetically produce a greater mass than expected; thus, the answer to this question is B.

9. In this case, since the mole ratio of oxygen to water is 1:2, the following proportional factor is used to calculate the produced mass of water:

3molO_2*\frac{2molH_2O}{1molO_2}=6molH_2O

Thus, the answer is this case is A.

Best regards!

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What determines the strength of an arrhenius base? give one example each of an aqueous solution of a strong base and an aqueous
IceJOKER [234]
The strength of an Arrhenius base determines percentage of ionization of base and the number of OH⁻ ions formed. 
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6 0
3 years ago
What types of questions can be answered through science and what questions are beyond the boundaries of science? Be specific and
Anna [14]
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3 0
3 years ago
This is not a homework question
Dovator [93]
What state you live in? because I know someone who does it for free
8 0
3 years ago
what volume of hydrogen gas is evolved from a reaction between 0.52 g of Na and water? This gas is collected at 20 C and 745mmHg
guapka [62]
The  volume of  hydrogen  gas  that evolved  is   calculated  as  follows
by  use  of   ideal  gas  equation

that  is  PV = nRT
P=745  mm hg
V= ?
R(gas  constant)= 62.36 L.mm hg/mol.k
T= 20 + 273 = 293 k
n=number  of  moles which is calculated as  follows
find the  moles  of Na  used
= 0.52/23=0.023  moles

write the reacting equation
2Na +2H2O =2NaOH +H2
by  use  of reacting  ratio  between  Na : H2  which  is  2:1  therefore  the mole  of H2 = 0.023/2 =0.0115  moles

by  making  the  volume  the   subject  of  the formula
v=nRT/P
V= (0.0115 x 62.36  x 293) / 745  = 0.283 L


6 0
3 years ago
What is released when an excited electron returns to a lower energy state?
Jobisdone [24]

Answer:

Light

Explanation:

3 0
3 years ago
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