Assume that you have a new triad of elements (A, B and C) with ...

[melly21297]

Assume that you have a new triad of elements (A, B and C) with similar properties. A is the smallest element and has a mass of 30 u. C is the largest element and has a mass of 90 u. The mass of B would be approximately ________ u.
 
  A) 40
  B) 45
  C) 60
  D) 80

Question 2

For the following endothermic reaction, what condition will increase the yield of product? N2 (g) + 2H2 (g) N2H4 (g)
 
  A) high temperature, high pressure
  B) high temperature, low pressure
  C) low temperature, high pressure
  D) low temperature, low pressure

Question 3

In the reaction CH4 + 2 O2  CO2 + 2 H2O, how many moles of oxygen are required to burn 16.0 g of methane?
 
  A) 0.500
  B) 1.00
  C) 2.00
  D) 32.0

Question 4

In the reaction CH4 + 2 O2  CO2 + 2 H2O, how many moles of oxygen are required to burn 8.0 g of methane?
 
  A) 0.5
  B) 1.0
  C) 2.0
  D) 32

Question 5

What is the mass of sulfur that will react with 0.527 g of copper metal to yield copper (I) sulfide?
 
  A) 0.066 g
  B) 0.132 g
  C) 0.264 g
  D) 0.198 g

[Kjones0604]

Answer to Question 1

C

Answer to Question 2

A

Answer to Question 3

C

Answer to Question 4

B

Answer to Question 5

B

[melly21297]

Both answers were spot on, thank you once again

[Kjones0604]

Great! Please up vote