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harkovskaia [24]
3 years ago
13

An ionic compound has the general formula, XCl2. Element X comes from which group? Justify your answer with an explanation and p

rovide an example.​
Chemistry
1 answer:
Rashid [163]3 years ago
6 0

Answer:

metal group

Explanation:

ionic bond = nonmetal + metal

Cl = nonmetal (you need a metal0

ex. LiCl2 or CaCl2

- Hope that helped! Let me know if you need a further explanation.

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An element has two naturally-occurring isotopes. The mass numbers of these isotopes are 113 amu and 115 amu, with natural abunda
DENIUS [597]

Answer: Its average atomic mass is 114.9 amu

Explanation:

Mass of isotope 1 = 113 amu

% abundance of isotope 1 = 5% = \frac{5}{100}=0.05

Mass of isotope 2 = 115 amu

% abundance of isotope 2 = 95% = \frac{95}{100}=0.95

Formula used for average atomic mass of an element :

\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})

A=\sum[(113\times 0.05)+(115\times 0.95)]

A=114.9amu

Thus its average atomic mass is 114.9 amu

5 0
3 years ago
After creating a prototype, which of the following would not be an appropriate next step in the design process of a new technolo
Ivanshal [37]
I would say D but i am not entirely sure 
4 0
3 years ago
Which of the following is a factor in natural selection?
Vera_Pavlovna [14]

Answer:

D.

Explanation:

Although all of these answers are similar, it seems that all three are the answer. I am sorry if the answer ends up being B but I'm pretty sure the answer is D. Charles Darwin's evolution theory "evolved", get it, from the natural selection theory. The theory is described as "the process whereby organisms better adapted to their environment tend to survive and produce more offspring." However, some factors that effect natural selection are competition, selection and variation. I believe all three fit the answer and therefore I believe answer D is correct.

5 0
3 years ago
Read 2 more answers
Gerald's science teacher mixed room temperature samples of hydrochloric acid and sodium hydroxide in a large beaker. The solutio
Rama09 [41]

Answer:

A.

A chemical reaction was producing a new substance.

Explanation:

Equation of the reaction

NaOH + HCl --> NaCl + H2O

Heat of neutralization is the amount of heat evolved when one mole of acid reacts with one mole of an alkaline to form one mole of water.

When a neutralisation reaction is carried out, there is an exothermic change; energy released into the surroundings therefore since heat is given out which is what is felt.

8 0
3 years ago
Express 36,000,000 in scientific notation
NNADVOKAT [17]

Answer:

3.6*10^7

Explanation:

I hope this helped you... Have a nice day.. UWU

5 0
2 years ago
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