According to the Law of conservation of mass, the grams of oxygen formed are A) 0.7 g.
Explanation:
According to the Law of conservation of mass, the total mass of the products in a chemical reaction must be equal to the total mass of the reactants.
In this problem, the chemical reaction is:
where
is the mercuric oxide
Hg is the liquid mercury
O is the oxygen
We have the following data:
(mass of mercuric oxide)
(mass of liquid mercury)
Since the mass of the products must be equal to the mass of the reactant (the HgO), we can find the mass of the oxygen produced:
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Answer:
False
Explanation:
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Answer:
Ft = 17.48°C
Explanation:
Ft is the final temperature. However, ice absorbs heat during two process of melting and cooling and as such, there is no loss of heat to or from the surrounding hence by conservation of energy.
Therefore,
Heat absorbed by water of 20g = heat rejected by water of 265g.
So; M(ice)[C(ice) [(ΔT) + LH(ice) + C(water)(ΔT)] = C(water) M(water) (ΔT)
So, 20[(2.108) [0 - (-20)] + 333.5 + 4.187(Ft - 0)]] = (285)(4.187) (25 - Ft)
To get;
7513 + 83.74 Ft = 29832.4 - 1193.3 Ft
So factorizing, we get;
83.74 Ft + 1193.3 Ft = 29832.4 - 7513
So; 1277.04 Ft = 22319.4
So; Ft = 22319.4/1277.04 = 17.48°C
Explanation:
An object that is partly or completely submerged experiences a greater pressure on its bottom surface than on its top.