Answer:
Heat of combustion =-7.35 *10² kJ
Explanation:
Step 1: Data given
Mass = 0.176 grams
Molar mass = 28.0 g/mol
Temperature increase 2.12 K
A bomb calorimeter has a heat capacity of 2.18 kJ/K
Step 2: Calculate heat of combustion
Energy released = mass *heat capacity* change in temperature
Q = c*∆T
Q = 2.18 kJ/K*2.12 K = 4.62 kJ released
Heat of combustion = (energy released)/(mole of substance)
Moles of gas = (0.176 g)/(28.0 g/mol) = 0.00629 moles
Heat of combustion = (energy released)/(mole of substance)
Heat of combustion = (4.62 kJ)/(0.00629 moles) = 7.35 *10² kJ
Heat of combustion =-7.35 *10² kJ (negative because heat is lost)
Answer:
Heavy water is a compound that is made up of oxygen and deuterium, a heavier isotope of hydrogen which is denoted by ‘ 2 H’ or ‘D’. Heavy water is also called deuterium oxide and is denoted by the chemical formula D 2 O.
Density: 1.107 g/mL
Dipole moment: 1.87 D
Heavy Water (Deuterium Oxide): D2O
Molecular Mass: 20.02 grams/mole
Explanation:
Answer: 13.888g
Explanation:
CaCO3 —> CaO + CO2
From the equation above, 1mole of CaCO3 produces 1mole of CaO. Since the answer is to be expressed in grams, let us covert this mole to grams. This is illustrated below:
MM of CaCO3 = 40 +12 + (16x3) = 40 + 12 + 48 = 100g/mol
MM of CaO = 40 + 16 = 56g/mol
From the equation,
100g of CaCO3 produced 56g CaO
Therefore, 24.8g of CaCO3 will produce Xg of CaO i.e
Xg of CaO = (24.8 x 56) / 100 = 13.888g
Therefore, the theoretical yield of CaO is 13.888g
Answer:
2.5 grams
Explanation:
law of conservation of mass applies. the magnesium completely burns
Answer:
2. It is made and released by the liver and stored in the gallbladder
3. It breaks down fats into fatty acids, which can be taken into the body by the digestive tract. So it helps with digestion
4. Order would go: Mouth. Esophagus. Stomach. The small intestine. Colon (large intestine) Rectum.
5. The salivary glands, liver, gallbladder, and pancreas are not part of the digestive tract, but they have a role in digestive activities and are considered accessory organs.
Explanation:
