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Nana76 [90]
3 years ago
11

Define significant figure. Discuss the importance of using the proper number of significant figures in measurements and calculat

ions.
Chemistry
1 answer:
anastassius [24]3 years ago
7 0

Explanation:

Significant figure is the measure of how accurately something can be measured. It carries meaning contributing to its measurement resolution. It is important to use proper number of significant figures to get a precise measurement. For example, if we use a meter stick then measurements like 0.874 meters, or 0.900 meters, are good because they indicate that we can measure to the nearest millimeter. Whereas a measurement like 0.8 does not tell that a meter stick can measure to the nearest millimeter.

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How large would the state of New York (235 miles across) be?
Ann [662]

Answer:

235 miles equals 5,280 feet

Explanation:

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What did J.J. Thomson discover about the atom that changed the atomic model previously used?
galina1969 [7]
J.J. Thomson hypothesized and discovered that the atom was not the smallest unit of matter but that instead there were much smaller units. He discovered "sub-atomic particles" which make up atoms. The sub-atomic particle that Thomson discovered was the electron. He discovered this through a process of experiments testing cathode rays.
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3 years ago
How many moles are in 50 g of CO2
murzikaleks [220]

Answer:

1.1 mol

Explanation:

n=m/M, where n is moles, m is mass, and M is molar mass.

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Hope that helps

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2 years ago
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3 years ago
Read 2 more answers
A series circuit has two 5.0-ohm resistors and a power source of 9.0 volts. How will the current be affected and what will it be
miskamm [114]
The formula for solving current given with resistance and power source or voltage is shown below:
I = V/R  

When two 5 ohms resistors are in series, we have:
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When it is being added with another 7.5 resistors, we have:
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I = 0.529 ampere

The answer to the question is the letter "D. decrease; 0.51 amps".
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3 years ago
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