General Chemistry Answers

how and why the decay of Uranium 238 and Technetium–99m are both considered spontaneous even though the time and rate of decay are different.

A 0.240g of a compound of oxygen and element X was found by analysis to contain 0.960g of X and 0.144g of oxygen

1. Calculate the percentage composition by weight

2. Calculate from the above data, three(3) possible weight for X relative to oxygen

NH4NO3(s) → N2O(g) + 2H2O(l)

In a certain experiment, 156 g of ammonium nitrate is decomposed. Find the mass of each of the products formed.

Calculate the concentration of urea (NH2CONH2) a non-electtrolyte that has an osmotic pressure of 30.0 atm at 293.15 K (Hint: Use 0.08206 as the value of R)

The energy associated with a material’s phase change is called:

a gas occupies a volume of 300cm3 at a temperature of 27 degree Celsius what's is it's volume at 54 degree Celsius when the pressure is constant

write the balanced redox equation of isopropyl alcohol and potassium dichromate.

Direction: Answer the following questions:

1. What unit is used to describe reaction rate?\

2. In a reaction between Mg and hydrochloric acid

Mg (s) + HCl (aq) --> MgCl₂ (aq) + H₂ (g)

The data below was recorded. Examine the data. What is the average rate of reaction?

Time Mass of Magnesium

0 0.012

2 0.010

6 0.006

8 0.004

what is the maximum amount of SF₄ that can be made in the reaction 16.87g of NaF and 98.42g of SCI₂

Calculate the molar mass of powdered fruit drink mix, made from sucrose (C₁₂H₂₂O₁₁).