Eyepiece, finder-scope, optical tube, aperture, focuser, and mount
and D. to identify minerals
Answer:
120g
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
Sn + 2HF —> SnF2 + H2
Next, we shall determine the number of mole of HF needed to react with 3 moles of Sn.
From the balanced equation above, 1 mole of Sn reacted with 2 moles of HF.
Therefore, 3 moles of Sn will react with = 3 x 2 = 6 moles of HF.
Finally, we shall convert 6moles of HF to grams
This is illustrated below:
Number of mole of HF = 6moles
Molar Mass of HF = 1 + 19 = 20g/mol
Mass of HF =..?
Mass = number of mole x molar Mass
Mass of HF = 6 x 20
Mass of HF = 120g
Therefore, 120g of HF is needed to react with 3 moles of Sn
The greenhouse effect increases the temperature of the Earth by trapping
heat in our atmosphere. This keeps the temperature of the Earth higher
than it would be if direct heating by the Sun was the only source of
warming.
When the sunlight reaches the surface of the Earth, some of it is absorbed
which warms the ground and some bounces back to space as heat. Greenhouse gases that are in the atmosphere absorb and then redirect some of this heat back towards the Earth.
Answer:
The answer is wind energy.
Explanation:
I did the quiz on time4learning.