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Marina86 [1]
3 years ago
12

Is helium is lightest monatomic element chemical properties

Chemistry
1 answer:
Anton [14]3 years ago
6 0
Hydrogen is the only lighter element
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Why does knowing the mass of an object not help you identify what material the object is made from?
jeka57 [31]
Because mass is not always the same for objects made from the same material. Just because an object has the same mass as another doesn’t mean they are the same material.
4 0
4 years ago
What is the shape around each carbon atom in ethylene, H C CH ? The represents a double bond.
Nina [5.8K]

Answer:

I'm not 100% sure,but I think its trigonal pyramidal

4 0
3 years ago
Calculate the quotient [co32–]/[hco3–] at ph 10.75.
KATRIN_1 [288]

The chemical equation is:

<span>HCO3^    ->  H^+ + CO3^2- </span>

 

We know that the formula for Ka is:
Ka = [H^+][CO3^2-]/[HCO3^-] 


log Ka = log[H^+] + log[CO3^2-]/[HCO3^-] 
pKa = pH - log[CO3^2-]/[HCO3^-] 
log[CO3^2-]/[HCO3^-] = pH - pKa = 10.75 - 10.329 = 0.421 
<span>[CO3^2-]/[HCO3^-] = Antilog (0.421)  = 2.636 </span>

 

Answer:

<span>2.636</span>

3 0
3 years ago
Which of he following is a secondary alkanol?
hodyreva [135]

Answer: Thus CH_3CH(OH)CH_3 is a secondary alkanol.

Explanation:

Alkanol are compounds which contains carbons bonded by single bonds and contains hydroxy (-OH) as functional group.

Primary alkanol are those compounds which contain hydroxyl group attached a carbon which is further attached to a single carbon atom. Example: CH_3CH_2CH_2OH and CH_3CH_2CH_2CH_2OH

Secondary alkanol are those compounds which contain hydroxyl group attached to a carbon which is further attached to two more carbon atoms.Example: CH_3CH(OH)CH_3

Tertiary alkanol are those compounds which contain hydroxyl group attached to a carbon which is further attached to three more carbon atoms. Example: C(CH_3)_3OH

Thus CH_3CH(OH)CH_3 is a secondary alkanol.

5 0
3 years ago
2. Give a "water-wise" alternative to each
Kitty [74]

Answer:

1. sweep it instead

2.use a wateringcan with a percise nossole to water your plants efectivly 3.keep a jug of water in your frisge

Explanation:

4 0
3 years ago
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