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mr_godi [17]
3 years ago
10

How are ionic bonds formed?

Chemistry
1 answer:
lisov135 [29]3 years ago
7 0

Answer:

D

Explanation:

It occurs when the outermost electrons are permanently transferred to another atom.

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I don’t know if it’s that one or not
Sphinxa [80]

Answer:

I think is the last one.

Anthracite – Stage Four

Anthracite, the fourth stage in coal formation, is also known as “hard coal” because it is hard and has a high lustre. It appears to have been formed as a result of combined pressure and high temperature. Anthracite burns with a short flame and little smoke.

3 0
3 years ago
Calculate the angle of a=1°, b=1', c= 1" in radians.
kari74 [83]
Answer 1) a=1° = 0.01745329252 radians

Explanation : According to the conversion chart, to convert 1° this formula is used;

<span>radians = degrees × π / 180°
</span>
while solving for, One degree  which is equal 0.01745329252 radians:

1° = π/180° = 0.005555556π = 0.01745329252 rad

Answer 2) b = 1' =  = 0.0002907 radians

Explanation : A minute of arc is π/10800 of radian; which is a measurement unit of angular which is equal to 1/60 of 1° degree.

So substituting the value of 1°  as  and on solving we get,

0.01745/60 = 0.0002907 radians.

A minute of arc is <span>π/<span>10800</span></span><span> of a </span>radian.

Answer 3) C= 1'' = 4.8481X 10^{-6}

Explanation - When calculating second of arc which is considered to be 1/60 of an arc minute, and 1/3600 of a degree; 

So all these are inter-related units which can be calculated if any one value is given;

<span>on solving we get, </span>π/648000 (about 1/206265) of a radian = 4.8481 X 10^{-6}
4 0
4 years ago
Please can you answer question 10
lakkis [162]
21 grams
166.0 - 145 = 21
8 0
4 years ago
In the reaction, Zn(s) + 2 HCl(aq) --&gt; ZnCl2 (aq)+ H2(g), 25 grams of Zn are reacted with 17.5 g of HCl. How many grams of H2
Gennadij [26K]

Answer:

0.480 g of H₂ are produced, in the reaction.

Explanation:

This is the reaction:

Zn(s)  +  2HCl → ZnCl₂ (aq) +  H₂ (g)

We havethe mass of both reactants, so we must work with them to find out the limiting reactant and then, determine the amount of H₂ produced.

Let's convert the mass to moles ( mass / molar mass)

25 g / 65.41 g/mol = 0.382 moles Zn

17.5 g / 36.45 g/mol = 0.480 moles HCl

Ratio is 1:2, so 1 mol of Zn react with the double of moles of HCl.

0.382 moles of Zn would need the double of moles to react, so (0.382 .2) = 0.764 moles of HCl. → We only have 0.480 moles, so the acid is the limiting.

Now let's determine the moles of H₂ formed.

Ratio is 2:1, so If i take account the moles I have, I will produce the half of moles of my product.

0.480 moles / 2 = 0.240 moles of H₂ are produced.

To find out the mass, we must multiply mol . molar mass

0.240 mol . 2g/mol = 0.480 g

3 0
3 years ago
Name the following compound: CH3 – CH2 – CH2 – CH2 – CH2 – CH2 – CH2 – CH3 octyle octyne octane octene
ad-work [718]
8 carbons is "oct" prefix (like polygons)
No pi bonds is "ane" suffix.

put it together to get.... Octane

6 0
3 years ago
Read 2 more answers
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