« 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 54 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?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

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.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

The mass media not only reflect gender stereotypes but they also play a role in changing them. ... The mass media not only reflect gender stereotypes but they also play a role in changing them. ...
Chemical equilibrium and the law of mass action. Chemical equilibrium and the law of mass action.
Mass Wasting Triggers Mass Wasting Triggers
Mass Wasting Forms Mass Wasting Forms
An empty spice bottle has an inner volume of 1.31 10-4 m3 . It has a mass of 112 g when filled ... An empty spice bottle has an inner volume of 1.31 10-4 m3 . It has a mass of 112 g when filled ...
Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an ... Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an ...
Video: Vasectomy

For a complete list of videos, visit our video library