« previous next »

Author Question: Which of the following has a molar mass equal to 133? A) (NH4)3PO3 B) Ca3(PO4)2 C) Al2(SO3)3 ... (Read 47 times)

Chelseaamend

  • Hero Member
  • *****
  • Posts: 545
on: Aug 27, 2018
Which of the following has a molar mass equal to 133?
 
  A) (NH4)3PO3
  B) Ca3(PO4)2
  C) Al2(SO3)3
  D) Co2(CO3)2

Question 2

Calculate a value for Erxn for a chemical reaction, if the reactants have an energy of +300 kJ/mol and the products have an energy of +100 kJ/mol. Is this reaction exothermic or endothermic?
 
  What will be an ideal response?

Question 3

Which one of the following reactions is NOT balanced?
 
  A) 2 CO + O2  2 CO2
  B) 2 SO2 + O2  2 SO3
  C) 2 KNO3 + 10 K  5 K2O + N2
  D) SF4 + 3 H2O  H2SO3 + 4 HF

Question 4

Which one of the following statements is NOT a correct statement of the Law of Conservation of Mass?
 
  A) The mass of a system is dependent upon chemical reactions that may occur.
  B) The mass of a system is conserved in a chemical reaction.
  C) Matter cannot be created or destroyed.
  D) Atoms are conserved in chemical reactions.


yuyiding

  • Sr. Member
  • ****
  • Posts: 357
Reply #1 on: Aug 27, 2018
Answer to Question 1

A

Answer to Question 2

-200 kJ/mol. Reaction is exothermic.

Answer to Question 3

C

Answer to Question 4

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Did you know?

Your heart beats over 36 million times a year.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Demonstration of equal segregation within one meiocyte in the yeast S. cerevisiae Demonstration of equal segregation within one meiocyte in the yeast S. cerevisiae
The Mass of Impacts on Earth The Mass of Impacts on Earth
Center of Mass of a Binary Star System Center of Mass of a Binary Star System
Air-mass thunderstorms—mT air masses Air-mass thunderstorms—mT air masses
Mass Wasting Forms Mass Wasting Forms
What is the isotopic atomic mass of an isotope if 9.7023 1022 atoms weighs 4.0256 g? What is the isotopic atomic mass of an isotope if 9.7023 1022 atoms weighs 4.0256 g?
Video: Hyperglycemia Animation

For a complete list of videos, visit our video library