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artcher [175]
4 years ago
10

Someone please help me i’m stuck

Chemistry
1 answer:
Daniel [21]4 years ago
5 0
I thought about writing it for you but then i found this and thought i will give help but at the sometime allow you write the response you self

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I need help with like 35 questions anyone willing to help please let me know I have discord
posledela

Answer and Explanation:

The molar mass of a substance is all of the weights from the elements combined.

So, we have the elements

CU, S, and O_{4}

CU has a mass is 65

S mass is 32

O has a mass of 16, but there's 4 atoms of O, so we do 16 times 4, which is 64.

Now we add.

65 + 32 + 64 is 161.

<u>So, the answer is 160, or answer choice A.</u>

<em><u>#teamtrees #PAW (Plant And Water)</u></em>

3 0
3 years ago
Round 23.455 cm into 4 significant figures: <br> cm
lina2011 [118]
23.450
i did this in chem so this should be right
7 0
3 years ago
Describe what constitutes Dalton's model of an atom
Tamiku [17]
The Constitution has seven parts to it it has amendments articles the Bill of Rights in the Declaration of Independence every Genia company of Charter
8 0
4 years ago
A pure Silicon crystal has 700,000 free electrons (actual number of electrons; not the concentration). How many holes does it ha
Sveta_85 [38]

Answer:

700,000 holes

Explanation:

When heat energy occurs to produce free electrons, the number of free electrons produced is directly proportional and equal to the number of holes it produces at that time.

Hence, if silicon crystal (pure) has 700,000 free electrons, then the number of holes it have is also 700,000.

3 0
3 years ago
The N H 2 group makes the molecule an amine. Like alcohols, amines can participate in hydrogen bonding. If the drawn molecule en
lesantik [10]

Answer:

a hydrogen bond between the hydrogen of water and the nitrogen of the amine

a hydrogen bond between the oxygen of water and a hydrogen from the -NH2 group

Explanation:

A hydrogen bond is formed between molecules in which hydrogen is bonded to a highly electronegative element.

In amines, hydrogen is bonded to nitrogen while in water, hydrogen is bonded to oxygen. Both are highly electronegative elements hence hydrogen bonding is possible between amines and water.

This hydrogen bond may involve;

The hydrogen of water and the nitrogen of the amine

Or

The oxygen of water and a hydrogen from the -NH2 group

7 0
3 years ago
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