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Artemon [7]
3 years ago
14

1. What is the weight of the ethyl alcohol that exactly fills a 200.0 mL container? The density of ethyl alcohol is 0.789 g/mL

Chemistry
1 answer:
timofeeve [1]3 years ago
3 0
Multiply 0.789g/mL by 200.0mL to obtain 157.8g of ethyl alchohol to fill the entire container.
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tate whether the following changes are physical or chemical for rancidipication fixation of water 2 tearing of paper 3 rusting o
damaskus [11]

Answer: Physical change : tearing of paper, fixing of wtaer

Chemical change:  rusting of iron ,  electrolysis of water​, Rancidification

Explanation:

Physical change is a change in which there is no rearrangement of atoms and thus no new substance is formed. There is only change in physical state of the substance.

Example:  tearing of paper, fixing of wtaer

Chemical change is a change in which there is rearrangement of atoms and thus new substance is formed. There may or may not be a change in physical state.

Example: rusting of iron ,  electrolysis of water​, Rancidification

3 0
2 years ago
The atomic number of nitrogen is 7. How many protons, neutrons, and electrons make up an atom of Nitrogen-15?
earnstyle [38]
<h2><u>Answer:</u></h2>

A nonpartisan iota of Nitrogen has a mass of 18. There are 7 protons in the core of this iota. What number of neutrons, complete electrons, and valence electrons are available  

Nitrogen 15 has a nuclear mass of 15. The mass number is # protons in addition to # of neutrons, so for N-15 mass is 15 and the protons are dependably 7 so there must be 15-7=8 neutrons. N-15 has 7 electrons since it has 7 protons and p = e.

6 0
2 years ago
Which of the following results in a chemical change in matter?
LenKa [72]
The correct answer is 

D burning wood

because it's changing the wood.

The other's are physical changes because it's still the same thing, it's just in a different form.

Glad I could help, and good luck!

AnonymousGiantsFan
8 0
2 years ago
Plz help ASAP
Artemon [7]

Answer: A 2.1

Explanation:

7 0
3 years ago
A certain compound is made up of one sulfur atoms, three bromine atom, and one phosphorus atom. what is the chemical formula of
Alisiya [41]
Thiophosphoryl Bromide
PSBr₃

:•)
5 0
3 years ago
Read 2 more answers
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