Chemistry Answers

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

a 10.0L cylinder of gas is stored at room temperature (20.0c) and a pressure of 1800psi if the gas is transferred to a 6.0L cylinder at what temperature would it have to be stored in order for the pressure to remain at 1800 psi

Which of the following combinations of quantum numbers is not allowed?

A. n = 3, l = 2, ml = -1, ms = -1/2

B. n = 2, l = 1, ml = -1, ms = -1/2

C. n = 2, l = 0, ml = 1, ms = +1/2

D. n = 3, l = 1, ml = 0, ms = +1/2

I belive it's c but im not so sure

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.

A CAPE Chemistry student sought to determine the solubility product, Ksp of calcium hydroxide by titrating saturated solution of Ca(OH)2 against standardized hydrochloric acid solution, HCl. The saturated Ca(OH)2 solution was filtered, to remove excess solute, and 25mL aliquots were titrated against 0.10M HCl solution using bromothymol blue indicator. 

Ca(OH)2(s)   ↔   Ca2+(aq)   +   2OH-(aq) 

A)Calculate the concentration of Calcium Hydroxide.

B)Use the equilibrium expression for the dissolution of Ca(OH)2 to determine the concentration of Ca2+ and OH–.

the reaction of diatomic fluorine gas with compound X yields a single product, compound Y. The mass percent composition of the product, compound Y is 61.7%F2 and 38.3%CL. What is the empirical formula for compound x?

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).