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maw [93]
3 years ago
15

Los enlaces covalentes se presentan tanto en sólidos moleculares como en los que forman una red covalente ¿porque estas clases d

e sólidos difieren tanto en su dureza y en su punto de fusión?
Chemistry
1 answer:
Viefleur [7K]3 years ago
3 0

Answer:can u anser my question

Explanation: On page 17, author Joey Bartolomeo writes “Caleb participated in the investigation by testifying about what happened during the health seminar at his school.” As it is used in that sentence, what does "testify" mean? *

0 points

C. to persuade someone to join a group

B. to disguise or hide from sight

A. to argue so as to make a person agree

D. to talk and answer questions about something after formally promising to tell the truth

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What is the percent composition in chloric acid (HClO3)?
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Total weight = 1 + 35.45 + 3 * 16 = 84.45

H = 1 / 84.45 * 100% = 1.18%
Cl = 35.45 / 84.45 * 100% = 41.98%
O = 48 / 84.45 * 100% = 56.84%
7 0
3 years ago
Calculate the total energy required to break all the bonds in:
Dennis_Churaev [7]

Explanation:

a. O+ 2=O2

b. C2+h2=CH4

c. C2+H6= C2H6

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3 years ago
The missing components in the table to the right are indicated with orange letters. use the periodic table and the tools bar to
Gnesinka [82]

Answer:

A: 349.0

B: 3.16

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3 years ago
A famous scientist named in the first 100 periodic table
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4 0
3 years ago
two kilogram of nasialo4 zeolites are used in a water filter to remove calcium. after complete ion exchange the zeolite is remov
defon

After ion exchange with zeolite in water filter to remove calcium by substitute natrium ion with calcium ion, the weight of zeolite become 1.9578 kg.

ion exchange calculation can be done by using basic stoichiometry if we know how the reaction of the ion exchange. In this case where zeolite with natrium ion will be exchanged with calcium. The reaction of exchange will be like this:

2NaSiAlO_{4} + Ca^{2+} ⇒ Ca(SiAlO_{4}) _{2} + 2Na^{+}

Calculate the molecule weight of both zeolite
Atomic weight data:
Na = 23 gram/mole

Si = 28 gram/mole

Al = 27 gram/mole

O = 16 gram/mole

Ca = 40 gram/mole

Molecule weight

NaSiAlO_{4} = 142 gram/mole

Ca(SiAlO_{4}) _{2} = 278 gram/mole

Calculate mole from 2kg of zeolite with natrium :

2000 gram/ 142 = 14.0845 mole

Based on the stoichiometry, we got the mole of zeolite with calcium:

14.0845 mole x 1/2 = 7.0423 mole

Weight of zeolite after the ion exchanged with calcium:

7.0423 mole x 278 = 1957.8 gram = 1.9578 kg

Learn more about ion exchange here: brainly.com/question/28203551

#SPJ4

6 0
1 year ago
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