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Classify the reaction type : combination , combustion, decomposition , single displacement, or double-displacement
a) PbO2(s) ? Pb(s)+ O2(g) ___________________
b) C2H5OH(l) + 3O2(g) ? 2 CO2(g) + 3H2O(l) ___________________
c) 2Al(s) + 3CuSO4(aq) ? Al2(SO4) 3(aq) + 3Cu(s) ___________________
d) NaCl(aq) + AgNO3 (aq) ? AgCl(s) + NaNO3(aq) ____________________
An unknown mass of each of the given substances 1.Sand (tf=70.4 C),2.Pyrex glass(tf=67.6 C),3.water(tf=55.9 C) ,4.ethanol (tf=45.9 C), initially at 19.0 degrees Celsius, absorbs 1930 Joules of heat. Find out the mass of each substance.
Explain the effect of that mistake on the calculated molarity MB. (Will the experimental MB calculated by Student A be higher or lower than the true MB value?)
what is the diffrence between anatomical theory of diease, humoral concept of diease, and germ diease.
The carbon and amino nitrogen of muscle alanine are radiolabeled with 14C and 15N respectively. Outline the metabolic journey that could result in the presence of
Limestone (CaCO3) is used to remove acidic pollutants from smokestack flue gases. It is heated to form lime (CaO), which reacts with sulfur dioxide to form calcium sulfite
What weight of chlorine gas will be needed to react completely with 85.8g of potassium iodide in a single replacement reaction.
You are a hazmat responder and walk into what appears to be a meth lab. There are flasks of iodine, White Gas fuel, Sodium Hydroxide, Nitric Acid, and a box of ephidrine.
Barium metal crystallizes in a body centered cubic lattice. the unit cell edge length is 502 pm and the density of the metal is 3.50g/cm3. using the information, calculate the avogadros number. assume 68% of the unit cell is occupied.
what are the concentrations of each component If a 10.00L vessel has 2.50 mol CO 2 and H 2 O, and 5.00 mol CO 2 and H 2 gas at 588°K, (Kc = 31.4 at 588°K), at equilibrium?
A mass of 1.37 g of an unknown gas is introduced into an evacuated 1.70 L flask If the pressure in the flask is 0.814 atm at 98 degrees C, which of the following gases might be in the flask?
A 486 mL sample of water was cooled from 50.0°C to 10.0°C. Assuming a specific heat of 4.184 J/K g and a density of 1.00 g/mL, find the amount of heat transferred from the water to the surroundings.
When 284.5 g of ethylene (C2H4) burns in oxygen to give carbon dioxide and water, how many grams of CO2 are formed?
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