« previous next »

Author Question: Which equation correctly represents the reaction between silica and hydrofluoric acid? A) SiCl4 + ... (Read 108 times)

shofmannx20

  • Hero Member
  • *****
  • Posts: 562
on: Aug 27, 2018
Which equation correctly represents the reaction between silica and hydrofluoric acid?
 
  A) SiCl4 + 4HF  SiF4 + 4HCl
  B) SiO2 + 6HF  H2SiF6 + 2H2O
  C) SiCl2 + 2HF  SiF2 + 2HCl
  D) SiH4 + 4HF  SiF4 + 4H2
  E) none of the above

Question 2

The formula weight of PbCO3 is ________ amu.
 
  A) 279.2
  B) 112.0
  C) 118.0
  D) 267.2
  E) 235.2


mcni194

  • Sr. Member
  • ****
  • Posts: 311
Reply #1 on: Aug 27, 2018
Answer to Question 1

B

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

A single base substitution leading to a single amino acid substitution in the hemoglobin beta chain A single base substitution leading to a single amino acid substitution in the hemoglobin beta chain
Pathways of arachidonic acid metabolism: Mechanisms of pain. Pathways of arachidonic acid metabolism: Mechanisms of pain.
How to write a quadratic equation in standard form when a graph is given How to write a quadratic equation in standard form when a graph is given
Serine and glycine are closely interconnected via the serine hydroxymethyltransferase reaction Serine and glycine are closely interconnected via the serine hydroxymethyltransferase reaction
Specific amino acid–nucleotide contacts for cI and Cro repressors Specific amino acid–nucleotide contacts for cI and Cro repressors
How to fully analyze the standard and factored form of a quadratic equation (Question 2) How to fully analyze the standard and factored form of a quadratic equation (Question 2)
Video: Stress and Immune System Animation

For a complete list of videos, visit our video library