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Black_prince [1.1K]
3 years ago
7

What advice would you give a person who handles hydrogen and oxygen in their workplace?

Chemistry
1 answer:
Murljashka [212]3 years ago
3 0


Regard the principle of utilization of two gas.

Make a consistent control of hardware containing gas.

Make a consistent control of weight diminishing valves giving gas.

No smoking zone.
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All the noble gases have similar chemical properties. <br> True or false?
zhenek [66]
<span>True , all noble gases have filled outer electron shells, and are  nonreactive with other atoms.</span>
3 0
3 years ago
What is the enthalpy of reaction from the following energy diagram?
ozzi

A. -20kj

Explanation:

The reaction is exothermic

therefore enthalpy = 20 - 40 = -20

7 0
3 years ago
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A student decreases the temperature of a 547 cm3 balloon from 590 K to 210 K.
gtnhenbr [62]

Answer:

≈194.7

Explanation:

(547cm^3/590K) / (V2/210K)

V2 = 194.69 or 194.7

:D

4 0
2 years ago
What is the name of this hydrocarbon? 2-dimethylyne 2-methylbutane 4-methylbutene 4,3-methylbutyne 4,4-methylbutane
Alisiya [41]
You have shown no structure, still we can work out for the answer :).

First Option: <span>2-dimethylyne: This name is incorrect, because it does not contain any parent chain name. 

Second Option: </span><span>2-methylbutane: I have drawn its structure below, compare it with your structure.

Third Option: </span>4-methylbutene:<span> I have drawn the structure for this name. But this name is also against IUPAC rules, and its correct name is 1-Pentene.

Fourth Option: </span><span>4,3-methylbutyne: Again incorrect name, 4,3 are two positions, but here only one substituent is given (methyl). I have drawn structure of 3,4-Dimethylbutene, this name is incorrect, and the correct name for this compound is 3-Methyl-1-pentene.

Fifth Option: </span><span>4,4-methylbutane: Again incorrect name, 4,4 means at 4 position two substituents, but in name only methyl is given. Anyhow lets make it two and draw a structure, for 4,4-Dimethylbutane. Ooops!! This name is also incorrect, and the correct name for this compound is 2-Methylpentane.

Result:
           Among all options only, option B (2-Methylbutane) is correctly named, and this will be the correct name for the structure given to you. </span>

8 0
3 years ago
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Which process is an example of a chemical change?
WARRIOR [948]

Answer:

A is the closest thing. You change the composition of the steak. You don't in any of the others.

Explanation:

Usually when you cook something, you are doing something to the composition of the object being cooked. A steak might not be obvious, but boiling an egg should be.

Chopping a tree is something physical. You are removing mass in such a way that the tree will fall. There's nothing chemical about that.

Heating a cup of tea looks like it might be chemical. After all steam is sometimes given off which looks like it is chemical. It's not. The water in the tea is just changing phase.

Drying clothes in a dryer. Again, this looks like something might have changed. After all the mass of the clothes just became less. But all you are doing is separating two masses (leaving one of them behind).

8 0
3 years ago
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