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polet [3.4K]
3 years ago
15

Select all that apply. Which of the following statements are true? Significant figures are an indicator of the certainty in meas

urements Significant figures communicate the level of precision in measurements Significant figures in a measurement are all measured digits, and one estimated digit None of the above
Chemistry
2 answers:
Ilya [14]3 years ago
5 0
Significant figures communicates the level of precision in measurements.
densk [106]3 years ago
4 0

Answer:

Significant figures are an indicator of the certainty in measurements

Significant figures communicate the level of precision in measurements

Explanation:

As the number of significant figures increases the precision of measurement increases hence a number with 3 significant figures is more precise than a number with 2 significant figures. Also the certainty of measurement increases with the increase in the number of significant figures. A number with 4 significant figures is more certain than a number with 2 significant figures.

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How many grams of chlorine gas can be produced when 50.0 grams of aluminum chloride decompose? 2AlCl3→ 2Al + 3Cl2
lianna [129]

Answer:

Explanation:

Approx.

425

⋅

g

Explanation:

2

A

l

(

s

)

+

3

C

l

2

(

g

)

→

2

A

l

C

l

3

(

s

)

You have given a stoichiometrically balanced equation, so bravo.

The equation explicitly tells us that

54

⋅

g

of aluminum metal reacts with

6

×

35.45

⋅

g

C

l

2

gas to give

266.7

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of

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hope this helps

6 0
3 years ago
What is the product of the unbalanced equation below?
Stolb23 [73]

Answer:

D

Explanation:

The answer is D. I'm not sure that it is a solid. I don't think it is a ppte, which is the only way it can be a true solid. It is ionic if the reaction is taking place in water and there is someway to start the reaction. Be that as it may, the internal balace numbers of the chemical produced is the only possible answer. The balanced eq;uatioon is

2Al + 3Br2 ==> 2AlBr3

3 0
3 years ago
Which of these measurements is expressed as three significant figures?
kipiarov [429]

Which of these measurements is expressed as three significant figures?  


C. 4.20 g


6 0
3 years ago
What is the initial temperature of 50g of water that was raised to 50*C by the addition of 4.18kJ of heat energy? (2 sig fig)
Alekssandra [29.7K]

Answer:

50

Explanation:

7 0
3 years ago
During a total solar eclipse, the Earth, Sun, and Moon are arranged in a line, and almost all of the Sun's light traveling to th
Flauer [41]
The answer would be A
5 0
3 years ago
Read 2 more answers
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