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a 17.92 g sample of copper was submerged in water, and the volume reading rose by 2.00 mL. what is the density of the copper sample?
The closed container holding the following reaction at equilibrium has its volume suddenly increased. Which way will the equilibrium shift to compensate this change?
If the reaction below produces 5,595.0 kJ of energy, how many grams of KCl will be produced? (KCl = 74.6 g/mol)
2 K (s) + Cl2 (g) à 2 KCl (g) ΔHrxn = –873.0 kJ
If the reaction below produces 5,595.0 kJ of energy, how many grams of KCl will be produced? (KCl = 74.6 g/mol)
2 K (s) + Cl2 (g) à 2 KCl (g) ΔHrxn = –873.0 kJ
Which of the following is the equation corresponding to the formation reaction for nitric acid in the gas phase? (ΔHrxn = ΔHproducts – ΔHreactants; ΔHrxn = Bond broken – Bonds made)
a) H (g) + N(g) + O3 (g) → HNO3 (g)
b) H2 (g) + N2(g) + 3 O2 (g) → 2 HNO3 (g)
c) H (g) + N(g) + 3 O (g) → HNO3 (g)
d) 1/2 H2 (g) + 1/2 N2(g) + 3/2 O2 (g) → HNO3 (g)
e) H2 + N2 + O2 → HNO3
1- bus
2- in balloon
3- making NH3
4- oil painting
Which one in correct option?
How much space does a wooden cube take up if its mass is 142.9 g and its density equals 0.72 g/cm3?
when 1 mole of potassium carbonate reacts with 2 mole HCI, 1 mole carbon dioxide and 1 mole water is formed. How many mole potassium chloride is produced?
If 4.3g of mercury(ii) oxide is thermally decomposed to mercury and oxygen , what maw of mercury will be produced. How many molecules will be produced?
(Hg=208,O=16,1 mole=6.02 x 10^23)
