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Nastasia [14]
2 years ago
9

Which describes the law of conservation of matter?

Chemistry
1 answer:
Snowcat [4.5K]2 years ago
8 0

Answer:

answer is B

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Look at the diagram below.
Irina-Kira [14]

Answer:

if charge of ion is positive then it will loose electron

if charge of ion is negative it will gain electron

4 0
3 years ago
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What is a biotic factor, and a an abiotic factor
statuscvo [17]

Explanation:

biotic factors are the things which have life like animals and plants

And Abiotic factors are the things which don't have life like air,stone and river

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3 years ago
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2. List and explain the three steps for solving a numeric problem.
Charra [1.4K]

Answer:

The steps for solving a numeric word problem are analyze, calculate, and evaluate. To solve a word problem, you must first determine where you are starting from (identify what is known) and where you are going (identify the unknown).

6 0
3 years ago
Which species is classified as a Arrenhius base? 1. CH3OH 2. LiOH 3. PO43- 4. CO32-
Otrada [13]

Answer:

2. LiOH

Explanation:

An Arrhenius base is a substance or chemical compound which increases  the number of OH- ions when added in water.

LiOH or lithium hydroxide is one of the strong Arrhenius base as it ionizes completely or near-completely in solution. When LiOH is added to water , it dissociates into lithium (Li+) and hydroxide (OH−) ions.

Hence, the correct answer is 2. LiOH.

4 0
3 years ago
In the first step of hydroboration mechanism, why is an arrow drawn from the pi bond of the alkene to the B atom of the borane r
fomenos

Answer:

To fulfill octet of B atom in borane, nucleophilic attack by pi electrons of alkene takes place with electrophilic B center in borane.

Explanation:

In Borane (BH_{3}), B atom has energetically vacant 2p orbital and thereby octet is incomplete.Therefore B center in borane act as an electrophilic center.

In alkene, pi bonding electrons are loosely bound together due to side on overlap of two constituent p-orbitals. Hence this pi bond can be easily broken. Alternatively, we can say that pi bond in alkene act as a potential nucleophile.

The first step of hydroboration occurs in a concerted manner where pi electrons of alkene first attack vacant 2p orbital of B in borane to fulfill it's octet (represented by an arrow drawn from alkene to B atom) and forms a 4 memebered cyclic intermediate. Simulaneously, a B-H bond in borane is donated to alkene through 3c-2e bond (3 center-2 electron bond).

Full mechanism has been shown below.  

5 0
3 years ago
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