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A sample of Gas occupies 368 ml at 27C and 600 mmHg. what will be the volume of the gas at 127 C and 600 mmHg
use NH2CONH2(s), is manufactured on a large scale and used as a fertilizer. To investigate its properties a student places 120.0 mL Of water at 25.0°C into a coffee cup Caloura metre and immerses a thermometer in the water. After about a minute, the student add 5.0 g Of solid urea to the water and measures the temperature of the solution as the urea dissolves. Temperature drops to 22.9°C.
a) calculate the molar enthalpy of solution for urea an H2CONH2(s)
b) Write the thermochemical equation for this reaction
According to estimates, 1.0 L of seawater contains on the average 4.0 x 10-9 g of gold. If gold is worth $390 per troy ounce and a troy ounce weighs 31.103g, how many cubic meters of seawater would have a millions dollars worth of gold in it?
What is Matter?
Which substance cannot be broken down by chemical means
In the titration of 25 ml of 0,05M of AgNO3 solution with 0,02M KSCN solution, Ag in the conical flak solution after the following additions of titrant KSCN solution;(1) 39 ml (2) at equivalence point (3) 100 ml. Ksp (AgSCN)
Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the
Does the increase in volume increase viscosity for mineral oil? why?
- To what volume must 30 mL of a 2.5M NaOH solution be diluted to make a 0.4M solution?
How many grams of ammonia can be made by reacting 100 g of N2 with 20 g of ?
What is the limiting reactant?
How much of the excess reactant will be left over? N2(g) + 3H2(g) → 2NH3(g)
