Answer:
Atomic mass formula is=neutron+proton
Answer is11
Explanation:
Atomic mass=proton+neutron
=4+5
=11
hope it helps u
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Okay... what are the following
False
As Nuclear Reactor is not not a good idea to do so.
We should be able to trasfer the heat energy to produce steam and the run turbine.
Also electricity is transferred to our homes through various appliances and fuses.
Answer is: velocity of the bowling ball is 6.19 m/s.
Momentum is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction in three-dimensional space.
m(ball) = 35.2 kg; mass of a bowling ball.
p(ball) = 218 kg·m/s; momentum of a ball.
v(ball) = p(ball) ÷ m(ball).
v(ball) = 218 kg·m/s ÷ 35.2 kg.
v(ball) = 6.19 m/s; velocity of a bowling ball.
1) We know that rtp = number of moles × 24
= 0.25 × 24
= 6 dm³
Therefore the volume of 0.25 moles of gas at rtp is A) 6 dm³
3.1) Amount of Copper = 20 tonnes
Amount of pure copper from impure copper = 18 tonnes
Purity of copper = (Pure copper/ impure copper) × 100
= (18 / 20) × 100
= 18 × 5
= 90 %
Therefore the purity of copper is 90%
3.2) We know that oxygen has 8 protons and 8 neutrons, so the weight of oxygen molecule is 8 + 8 = 16 u
So, one mole of oxygen weighs 16 g, so 2 moles weigh 2 × 16 = 32 grams
But oxygen is diatomic so the weight is 32 × 2 = 64 grams
Therefore the weight of 2 moles of oxygen is 64 grams
3.3) Concentration of solution = Amount of solute/volume
= 4 moles/ 2 dm³
= 4 / 2
= 2 mol/dm³
Therefore the concentration of a solution containing 4 moles in 2 dm³ of solution is 2 mol/dm³
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