Answer:
2 Mg(s) + O2(g) → 2 MgO(s)
As magnesium (Mg) has a valency of +2, and oxygen (O) has a valency of -2, the ratio would be 1:1, and magnesium oxide would be represented as MgO. It is insoluble in water, hence it has the subscript as a solid, represented by (s). In order to use up the diatomic oxygen (O2), there needs to be two moles of magnesium (2Mg) on the reactant side. This would produce 2 moles of MgO on the product side.
Explanation:
Answer:
Law conservation of charge (D)
Explanation:
Answer:
A ruler.
Explanation:
Just measure height, length and width and multiply each.
Answer:
145.43 N
Explanation:
Weight is given by (mg)
where m = mass of the body
g = acceleration due to gravity
mass is constant everywhere and is equal to 77.1 kg, both on the earth and on the moon.
But the acceleration due to gravity exerted by the moon near the moon's surface is 16.6% that of Earth,
g(moon) = 0.166 g(earth) = 0.166 × 9.8 = 1.6268 m/s²
Weight on the moon = mg(moon) = (77.1×1.6268) = 125.43 N
Answer: The speed of the ball is 7.64 m/s.
Explanation:
The distance between the player and the pins is 16.5m
if the velocity of the ball is V, then the time in which the ball reaches the pins is:
T = 16.5/V
Now, after this point, the sound needs
T' = 16,5/340 = 0.049 seconds to reach the player, this means that the time in that the ball needs to reach te pins is:
2.65 s - 0.49s = 2.16s
Then we have:
T = 2.16s = 16.5/V
V = 16.5/2.16 m/s = 7.64 m/s
