Chemistry Answers

Calculate the molar mass of sucrose in a solution prepared by dissolving 4.27 grams glucose in 50.0 grams water. The solution boils at 100.13 °C which is above the normal boiling point of pure water. Kb = 0.512C°/m

1.   Calculate the freezing point of a solution containing 50.0 g of NaCl in 5000 mL of water. K_f for water is 1.86 C˚/m  

how filterability distinguishes the particle size of the three given systems in the experiment

Rank the elements by effective nuclear charge, 𝑍eff, for a valence electron.

What happens after reactant molecules collide?

Differentiate the types of moving particles (normal, slow and fast moving particles) when they approach each other before collision, during collision and after collision.

The half-life of sodium -24, a radioistope used as a tracer for the cardiovascular system, is 14.951 hours. How many grams of sodium -24 will remain after 24.0 hours in a sample initially containing 100 mg?

Find the mass percent of CuSO4 in a solution whose density is 1.30 g/mL and whose

molarity is 1.22 M.

A. 22.1 %

B. 12.4 %

C. 15.0 %

D. 31.6 % 

Determine the values of the following variables in circuit A.

Given= Vs-12v

C1-100uF

C2-200uF

C3- 5uF

A. V1

B. V2

C. V3

D. Q1

E. Q2

F. Q3

G. Total capacitance, CT

H. Total charge, QT

Refer to the phase diagram of water and carbon dioxide..

1. What phase of water exists at 100°C and 5 atm?

2. What is the critical point for CO2 and water?

3. What phase of CO2 exists T-120°C? At 80°C and 100 atm?