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JulsSmile [24]
3 years ago
15

Which change to an atom occurs when it forms a positive ion​

Chemistry
1 answer:
Semmy [17]3 years ago
5 0

Answer: loss of electrons

Explanation:

An atom is made up of three subatomic particles named protons neutrons and electrons. An atom forms positive ion with the loss of at least one electron.

For instance: Calcium with atomic number 20, and electronic configuration 1s2, 2s2 2p6, 3s2 3p6, 4s2 will lose the two outermost electrons to form a divalent positive ion (Ca2+).

Ca --> Ca2+ + 2e-

Thus, loss of electrons is the change to an atom that occurs when it forms a positive ion​

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What is one of the possible products of a solution if cai2 is mixed with a solution of nano3?
11Alexandr11 [23.1K]
Answer:
The two products that will be formed are:
Ca(NO3)2
NaI

Explanation:
When NaNO3 reacts with CaI2, double substitution reaction takes place.
This means that I2 and NO3 will each substitute the other.
The chemical reaction used to explain this is as follows:
2NaNO3 + CaI2 .........> 2NaI + Ca(NO3)2

Hope this helps :)
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4 years ago
The molecule shown here can decolourise bromine water (above)
Sedaia [141]

Answer:

B hopefully this helps you

3 0
3 years ago
Balance the following redox equations by the ion-electron method:? A) H2O2 + Fe 2+ ---> Fe 3+ + H2O (in the acidic solution)
Vaselesa [24]
We balance the given reactions above by following the rules in balancing redox reactions in acidic or basic solutions. Balance the atoms aside from the O and H atoms. Then we balance the Os and Hs by adding H2O or H+. Finally, we balance the total charge of the reactant and product by adding e-. We do as follows:

<span>A) H2O2 + Fe 2+ ---> Fe 3+ + H2O (in the acidic solution)
</span><span>   2H+ + </span>H2O2 + Fe 2+ ---> Fe 3+ + 2H2O 
   e- + 2H+ + H2O2 + Fe 2+ ---> Fe 3+ + 2H2O 
<span>
C) CN- + MnO4- ---> CNO- +MnO2 (in basic solution)
</span>     CN- + MnO4- ---> CNO- +MnO2 + H2O
     2H+ + CN- + MnO4- ---> CNO- +MnO2 + H2O
     2OH- + 2H+ + CN- + MnO4- ---> CNO- +MnO2 + H2O + 2OH-
     2H2O + CN- + MnO4- ---> CNO- +MnO2 + H2O + 2OH-
     e- + H2O + CN- + MnO4- ---> CNO- +MnO2 + 2OH-
<span>
E) S2O2/3- + I2 ---> I- + S4O2/6- (in acidic solution)
    2</span>S2O2/3- + I2 ---> 2I- + S4O2/6- 
    4H+ + 2S2O2/3- + I2 ---> 2I- + S4O2/6- + 2H2O
    6e- + 4H+ + 2S2O2/3- + I2 ---> 2I- + S4O2/6- + 2H2O

3 0
4 years ago
A line is perpendicular to<br> y = -3x – 9<br> What is the slope of this<br> perpendicular line?
Gwar [14]

Answer:

a. 1/3

In the picture- D. 4

Explanation:

The product of the gradients of perpendicular lines =-1

m1m2=-1

Given an equation of a line in the form y=mx+c, m is the gradient of the line.

For y= -3x-9, m=-3

m1m2=-1

-3×m2=-1

m2=1/3

The gradient of the perpendicular line is 1/3

For the question in the picture, y=-1/4x-9, m=-1/4

m1×m2=-1

-1/4m2=-1

m2=4

The slope of the line perpendicular to y=-1/4x-9 is 4

6 0
3 years ago
Read 2 more answers
Calculate the Calories per gram for each food you tested by dividing the Calorie value by the mass of the food. How do these val
klemol [59]

Answer:

Peanut: 3.2 Calories per gram

Cheeto: 0.19 Calories per gram

(btw I wasn't given a nutrition label for either & on nutrition labels there are no "Calories per gram" so I'm a bit confused)

Explanation:

h

7 0
3 years ago
Read 2 more answers
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