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Kobotan [32]
3 years ago
7

What does the law of conservation of matter state?

Chemistry
1 answer:
drek231 [11]3 years ago
5 0

The answer is c. Matter can be changed, but not created or destroyed.

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How to calculate the magnification of the drawing?
timofeeve [1]
The actual size of something times the magnification is equal to the size of the appearance of the object in the image. Therefore, to find the magnification, divide the size of the image by the actual size of the object.
8 0
3 years ago
How many significant figures are in the measurement 40,500 mg?
schepotkina [342]

b) three

this is because all integers are sig figs, and all numbers between integers are sig figs. This makes the 40,5 part of 40,500 significant. Place holder zeroes that are not after a decimal are not significant, so the last two zeroes of the number are not significant.

3 0
3 years ago
Pleeeeeeeeeeeeeeeeeeas help
SIZIF [17.4K]

Answer:

For young organic materials, the carbon-14 (radiocarbon) method is used. The effective dating range of the carbon-14 method is between 100 and 50,000 years.

Explanation:

The answer is the explanation.

4 0
2 years ago
I NEED HELP PLEASE! :)
riadik2000 [5.3K]

Answer:

C_{21} H_{23} NO_{5}

Explanation:

First thing is we have assume all the percents are grams so we have

68.279g C, 6.2760g H, 3.7898g N, and 21.656g O

Now convert each gram to moles by dividing the the molar mass of each element

68.279g/12.01g= 5.685 moles of C

6.2760g/1.01g= 6.214 moles of H

3.7898g N/14.01g= 0.271 moles  of N

21.656g O/ 16.00g= 1.354 moles of O

Now to find the lowest ratios divide all the moles by the smallest number of moles you found, in our case, the smallest moles is 0.271 moles of N so divide everything by that....

5.685 moles/0.271 moles ------> ~21 C

6.214 moles/0.271 moles --------> ~23 H

0.271 moles  / 0.271 moles  ---------> 1 N

1.354 moles/ 0.271 moles ----------> ~5 O

So the empirical formula is C21H23NO5 C_{21} H_{23} NO_{5}

5 0
3 years ago
Pfderghrkldesfnckasjnfckadsjdncvfl.asknd;kjf
ehidna [41]

Answer:

ikr

Explanation:

8 0
4 years ago
Read 2 more answers
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