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NARA [144]
3 years ago
15

when a log of wood burns, it undergoes a _______. a. physical change. b. chemical change. c. physical and a chemical change. d.

no physical or chemical change.
Chemistry
2 answers:
AlexFokin [52]3 years ago
6 0

B. chemical change because a new substance is forming with new properties.

statuscvo [17]3 years ago
3 0
B. Chemical change is the answer!<span />
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The envelope of gases surrounding the earth or another planet.
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How many moles of chlorine (Cl) atoms are in a sample of 1.72 × 1022 atoms?
Ainat [17]
<span>1mole of Cl atoms contain the Avogadro's number 6x10 exp 23(10 to the power of 23)
there for xmoles of Cl atoms is contained in 1.72x1022atoms
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2.93 exp -23moles(2.93 x10 to the power of -23)



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3 0
4 years ago
Question 18 (Essay Worth 8 points)
DENIUS [597]

Yes, the law of conservation of mass holds.

Explanation:

In every chemical reaction, mass is always conserved. This implies that in chemical reaction, the process proceeds maintaining the same set of atom in the same proportion without new ones forming.

  • From the description given, decomposition of the Silver carbonate will produce a silver residue with the given mass.
  • The other mass that seems lost can be examined to be given off as carbon dioxide gas which is the other product of the reaction and oxygen.
  • Therefore, since the products are silver, carbon dioxide and oxygen, the remaining mass is that of the carbon dioxide and oxygen. It is not lost.

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brainly.com/question/6837993

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4 0
3 years ago
Write the number in scientific notation 1123<br>​
Anastasy [175]
1.123 * 10^3 thatsssss it
4 0
4 years ago
3<br> Convert 5.492 x 104 grams to units of micrograms.<br> (Click to select 4<br> x 10<br> ug
Soloha48 [4]

Answer:

5.492*10^10

Explanation:

1g=1000000microgram

3 0
3 years ago
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