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3 years ago

How many significant figures does the number 0.00650 have?

Chemistry

2 answers:

Gre4nikov [31]3 years ago

5 0

There are three of them

Arte-miy333 [17]3 years ago

5 0

Answer:

Explanation:

For decimals, you always start at the first non-zero number and count all the way to the end of the number. To count the number of significant figures this number has, you start at 6 and count every number after that for a total of 3.

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PLEASE HELP!

Vikki [24]

Answer:

yes, the trash did disappear when she burned it however it releases smoke into the air (and harmful chemicals)

Explanation:

burning trash doesn’t only allow the waste to go down, it will also produce heat and electricity-while producing less greenhouse gas pollution than burning fossil fuels. However trash fires in burning barrels can smolder and, as a result, produce more harmful chemicals in smoke. Harmful contaminants can also be found in dirt. in conclusion, yes trash does disappear when burned but realeases many harmful chemicals.

hope this helped!

6 0

3 years ago

According to the United States Department of Agriculture (USDA), Texas had 4 , 015 , 000 beef cows in 2013 . If one cow produces

marishachu [46]

Answer:

3.00 × 10¹¹ g

Explanation:

According to the United States Department of Agriculture (USDA), Texas had 4,015,000 beef cows in 2013. One beef cow produces 205 grams of methane per day. The methane produced by the beef cows in Texas per day is:

$4,015,000Cow \times \frac{205gCH_4}{cow \times day} = \frac{8.23 \times 10^{8}gCH_4}{day}$

Each year has 365 days. The methane produced by the beef cows in Texas per year is:

$\frac{8.23 \times 10^{8}gCH_4}{day} \times \frac{365day}{1y} = 3.00 \times 10^{11}gCH_4$

5 0

4 years ago

7. DNA is essential to living organisms because it O is a spiral helix can prevent disease O carries the genetic code O can brea

dsp73

Answer: DNA is essential...because it carries the genetic code.

Explanation:

Although the other statements are true about DNA, it's a spiral helix and can break apart, its main function is that it contains the genetic code for organisms.

5 0

3 years ago

How many significant figures are in the measurement 40, 500 mg? a) two b) three c) four d) five

emmainna [20.7K]

I believe there are 3 significant figures B.

8 0

3 years ago

What is the valency of hydroxide

Simora [160]

Answer:

Its valancy is 1.

As it has the formula OH-.

It has valancy 1.

hope it helps..

4 0

3 years ago