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svetlana [45]
3 years ago
7

How many moles are in 1.20 x 10^21 atoms of Phosphorus?

Chemistry
1 answer:
Ludmilka [50]3 years ago
8 0

Answer:

You would get 19.969 moles

Explanation:

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The correct lewis structure for COH2 contains how many covalent bonds?
VARVARA [1.3K]

Answer:

Four covalent bonds.

Explanation:

Hello,

In this case, given the attached picture in which you can find the Lewis dot structure for metanal (formaldehyde) we can see two C-H bonds and two C-O bonds via a double bond, thus, we can compute the type of each bond given the electronegativities of hydrogen, carbon and oxygen which are 2.1, 2.5 and 3.5 respectively:

C-H=2.5-2.1=0.4\\C-O=3.5-2.5=1.0

Thus, since both electronegativity difference are less 1.7 we infer that all of them are covalent, therefore, it has four covalent bonds, two C-H bonds and a double C-O bond.

Best regards-

8 0
3 years ago
MgO + H2O = Mg(OH)2 is an example of a _____ chemical reaction.
algol [13]

a) synthesis- or combination- reaction

3 0
3 years ago
Which term describes this reaction?<br> addition<br> condensation<br> elimination<br> substitution
vlada-n [284]
The others are wrong it's B. Condensation
5 0
3 years ago
Read 2 more answers
Calculate the concentration of an aqueous solution of naoh that has a ph of 11.50
Reika [66]
NaOH is a strong base and complete dissociation into Na⁺ and OH⁻ ions. 
Therefore [NaOH] = [OH⁻]
To calculate the [OH⁻], we can first find the pOH as NaOH is a basic solution.
pH + pOH = 14
Since pH = 11.50
pOH = 14 - 11.50
pOH = 2.50
We can calculate [OH⁻] by knowing pOH 
pOH = -log[OH⁻]
[OH⁻] = antilog(-pOH)
[OH⁻] = 3.2 x 10⁻³ M
therefore [NaOH] = 3.2 x 10⁻³ M
7 0
3 years ago
Read 2 more answers
. Magaling ako sa barirala o​
Nat2105 [25]

Answer:

I'm good at grammar or

Explanation:

I hope this Spanish

7 0
2 years ago
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