« 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 48 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?

On average, the stomach produces 2 L of hydrochloric acid per day.

Did you know?

Drug-induced pharmacodynamic effects manifested in older adults include drug-induced renal toxicity, which can be a major factor when these adults are experiencing other kidney problems.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

The National Organization for Women holds a rally in Illinois for the Equal Rights Amendment. In ... The National Organization for Women holds a rally in Illinois for the Equal Rights Amendment. In ...
Failure of the Equal Rights Amendment, 1972–1982 Failure of the Equal Rights Amendment, 1972–1982
Change in Bone Mass over Time In your early years, more bone mass is added than lost in your body Change in Bone Mass over Time In your early years, more bone mass is added than lost in your body
Mass Wasting Forms Mass Wasting Forms
What is the mass % of H2S04 in concentrated sulfuric acid? What is the mass % of H2S04 in concentrated sulfuric acid?
What is the molar solubility, (S), of FeCO3 if the ksp = 3.07*10^-11 for this substance? What is the molar solubility, (S), of FeCO3 if the ksp = 3.07*10^-11 for this substance?
Video: Bone Healing Animation

For a complete list of videos, visit our video library