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Alja [10]
3 years ago
6

If you remove one neutron from helium, the remainder is what element?

Chemistry
1 answer:
Nata [24]3 years ago
4 0
If you remove one neutron from helium, the remainder element remains the same but it become the isotope of helium. Because if the number of neutrons are changes in the element, they are the isotopes of the that element. And if you remove the one proton from helium then it will become another element that is hydrogen.
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Which is the strongest base among NO3-, So4-, CH3COO- and Cl-​
vodomira [7]

Answer:

CH3COO-

Explanation:

The conjugate base if a weak acid is a strong base, and the conjugate base of a strong acid is a weak base.

Acetic acid is a weak acid, so its conjugate base (CH3COO-) is a strong base.

Nitric, sulfuric, and hydrochloric acids are all strong acid. Their conjugate bases (NO3-, SO4^2-, and Cl- are all weak bases.

3 0
3 years ago
Water is made of two [Blank] atoms and one [Blank] atom. (please fill in the blanks)​
natima [27]
Two [hydrogen] atoms and one [oxygen] atom
5 0
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Read 2 more answers
Potassium nitrate has a lattice energy of -163.8 kcal/mol and a heat of hydration of -155.5 kcal/mol.
Brut [27]

Answer:

<em>293.99 g </em>

OR

<em>0.293 Kg</em>

Explanation:

Given data:

Lattice energy of Potassium nitrate (KNO3) = -163.8 kcal/mol

Heat of hydration of KNO3 = -155.5 kcal/mol

Heat to absorb by KNO3 = 101kJ

To find:

Mass of KNO3 to dissolve in water = ?

Solution:

Heat of solution = Hydration energy - Lattice energy

                           = -155.5 -(-163.8)

                           = 8.3 kcal/mol

We already know,

1 kcal/mol = 4.184 kJ/mole

Therefore,

= 4.184 kJ/mol x 8.3 kcal/mol

= 34.73 kJ/mol

Now, 34.73 kJ of heat is absorbed when 1 mole of KNO3 is dissolved in water.

For 101 kJ of heat would be

= 101/34.73

= 2.908 moles of KNO3

Molar mass of KNO3 = 101.1 g/mole

Mass of KNO3 = Molar mass x moles

                         = 101.1 g/mole  x  2.908

                         = 293.99 g

                         = 0.293 kg

<em><u>293.99 g potassium nitrate has to dissolve in water to absorb 101 kJ of heat. </u></em>     

4 0
3 years ago
I will give brainliest and 76 points
katen-ka-za [31]

Answer:

number 5 is the answer

Explanation:

8 0
2 years ago
Of the groups below, which are the least chemically reactive?
seropon [69]

It is actually Group 3A elements. I just took the test.

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