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Sav [38]
3 years ago
8

THE RIGHT ANSWER WILL RECIEVE A BRAINLEST AND POINTS AND THANXS!!!

Chemistry
2 answers:
olya-2409 [2.1K]3 years ago
7 0

There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.


Answer: If a new substance is formed its a chemical change if there is no change its a physical change.

Molodets [167]3 years ago
3 0
If you can't revert the change using physical means then it is a chemical other wise it is a physical, such as rusting, you can't revert it, but freezing you can heat it and get the thing you started with back
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This system relates to the process by which an organism gets rid of its waste.
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The system that relates to the process by which an organism get rid of its waste is Excretory.
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3 years ago
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A 10.4 g sample of CaSO4 is found to contain 3.06 g of Ca and 4.89 g of O. Find the mass of sulfur in a sample of CaSO4 with a m
andrey2020 [161]

The mass of sulfur in a sample of CaSO4 with a mass of 65.8 g is 15.50g.

<h3>How to calculate mass of an element in a compound?</h3>

According to this question, a 10.4 g sample of CaSO4 is found to contain 3.06 g of Ca and 4.89 g of O.

This means that the mass of sulfur in the 10.4g of CaSO4 is 10.4g - (3.06g + 4.89g) = 10.4g - 7.95g = 2.45g

Next, we calculate the percent ratio of each element in the compound; CaSO4.

  • Ca = 3.06g/10.4g × 100 = 29.42%
  • S = 2.45g/10.4g × 100 = 23.56%
  • O = 4.89g/10.4g × 100 = 47.02%

According to this question, a sample of CaSO4 with a mass of 65.8 g is given. The mass of each element in this compound is as follows:

  • Ca = 29.42/100 × 65.8g = 19.36g
  • S = 23.56/100 × 65.8g = 15.50g
  • O = 47.02/100 × 65.8g = 30.94g

Therefore, the mass of sulfur in a sample of CaSO4 with a mass of 65.8 g is 15.50g.

Learn more about mass at: brainly.com/question/13672279

#SPJ1

5 0
2 years ago
How many total atoms are there in one molecule of C145H293O168?
nasty-shy [4]

Answer:

606 atoms

Explanation:

Add the numbers    145 + 293 + 168

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A molecule of glucose is comprised of 6 atoms of carbon, 12 atoms of hydrogen, and 6 atoms of oxygen.
Svetradugi [14.3K]

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C6H12O6 the third choice

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3 years ago
Imagine that you need to determine the number of grams of salt necessary to make 1.5 L of a 0.80 M NaCl solution.
kap26 [50]
0.80M = x/1.5L
x = 1.2 moles
1.2 moles of Na is about 27.6 grams of Na
3 0
3 years ago
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