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s344n2d4d5 [400]
3 years ago
5

Which value of x from the set {4, 5, 6, 7), makes this equation true?

Chemistry
2 answers:
antiseptic1488 [7]3 years ago
6 0

Answer:

Err

Explanation:

Idfk

irina [24]3 years ago
3 0
C and d is the answer
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How can the percent yield be used to determine the actual yield of a chemical reaction
Alexeev081 [22]

Answer: Theoretical yield is calculated based on the stoichiometry of the chemical equation. The actual yield is experimentally determined. The percent yield is determined by calculating the ratio of actual yield/theoretical yield.

Explanation:

5 0
2 years ago
A student wants to measure the entropy of ice. What should the student do?
Helen [10]

Answer: Option (c) is the correct answer.

Explanation:

Entropy is defined as the degree of randomness. This means that more is the number of collisions taking place between atoms of a substance more will be the randomness.

Therefore, more will be the entropy of substance. We cannot measure the entropy but we can measure the change in entropy of a substance.

A thermometer is a glass tube that contains a liquid column generally mercury, and it is usually used to measure the temperature of human body.

A calorimeter is a device or apparatus that is used in a chemical reaction to measure the amount of heat involved.

Therefore, we can conclude that the student can't measure entropy directly, only an entropy change.

 

6 0
3 years ago
FREE BRAINLEIAST FOR FIRST GOGOGOGO!!
olga2289 [7]

Answer:

MEMEME

Explanation:

6 0
3 years ago
Help plz! im not understanding
valina [46]

a is 8.46 × 10^5

b is 3 ×10^-2

Explanation:

i hope this helps

4 0
2 years ago
Need asap! Step-by-step pls: Determine the empirical formula: 32.37% Na, 22.58% S, 45.05% O​
Ludmilka [50]

1) divide each percentage by the relative atomic mass of the element

2) divide all results by the smallest number

3)multiply by a whole number to get the simplest whole number ratio (if necessary)

that is to say:

Na                                   S                            O

32.37÷23                 22.58÷32                45.05÷16

= 1.407                       = 0.7056               = 2.816       (to 4 significant figures)

the smallest number here is 0.7056 so:

1.407÷0.7056        0.7056÷0.7056       2.816÷0.7056

=1.99 approx.2                   = 1                   3.99 approx. 4

here there is no need to carry out step 3 as ratio obtained is already a simplest whole number  ratio

so empirical formula is: Na₂SO₄

8 0
3 years ago
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