<h3>
Answer:</h3>
0.5 moles KF
<h3>
Explanation:</h3>
Mass of the compound = 29 g KF(Potassium chloride)
We need to get the moles of KF
Moles are given by dividing the mass of a compound by its molar mass.
In this case,
Molar mass of potassium chloride = 58.0967 g/mol
Therefore;
Moles = 29 g ÷ 58.0967 g/mol
= 0.5 moles
Therefore, 29 g of KF contains 0.5 moles
Answer: option C) Na, Mg, K
Explanation:
Similar chemical properties are expressed by elements found in the same or close groups. There are Seven (7) groups in the Periodic table.
Of all the options, ONLY sodium Na, Magnesium Mg, and Potassium K, are located in closely together with SODIUM and MAGNESIUM being in the Same period, while SODIUM and POTASSIUM are placed in the same Group 1.
Therefore, Na, My, and K are most similar in chemical properties
Was there supposed to be a picture attached?
An electromagnet can be turned on or turned off which makes it useful for construction purposes to lift heavy metal objects.
Answer:
The kinetic increases by 48.84 %
Explanation:
The expression for the kinetic energy is:-
Where, m is the mass of the object
v is the velocity of the object
Let the new velocity is:- v'
v is increased by 22 %. Thus, v' = 1.22 v
So, the new kinetic energy is:-
<u>Thus, the kinetic increases by 48.84 %</u>