Questions and answers by

louren

Questions (16)

Verify that sec(θ)/csc(θ)-cot(θ) - sec(θ)/csc(θ)-cot(θ) = 2csc(θ) is an identity.please help! thank you!
1. 1 answer
2. 573 views
What is the oxidation number of chlorine in Al(ClO4)3?I don't understand this question, can someone help? Thank you!
1. 4 answers
2. 5,555 views
If 5.40 kcal of heat is added to 1.00 kg of water at 100⁰C, how much steam at 100⁰C is produced? Show all calculations
1. 0 answers
2. 622 views
You have two sealed jars of water at the same temperature. In the first jar there is a large amount of water. In the second jar
1. 0 answers
2. 509 views
Experimental Design: From the work you have done this semester, choose a topic and design an experiment you would be able to
1. 2 answers
2. 1,568 views
Magnesium nitride is formed in the reaction of magnesium metal with nitrogen gas in this reaction: 3 Mg(s) + N2(g) --> Mg3N2(s)H
1. 3 answers
2. 1,796 views
Which of the following is NOT true about a nuclear power plant?A. They can explode like a nuclear bomb. B. They produce
1. 1 answer
2. 1,009 views
What number is missing from this nuclear equation?? 13Al + 1 0n --> 28 13Al A. 28 B. 41 C. 29 D. 27 would this be D? please
1. 1 answer
2. 498 views
A radioactive isotope of radium (Ra-226) has a half-live of 1620 years. How much of this isotope remains after three (3)
1. 0 answers
2. 711 views
The element oxidized in the reaction described in PbO2 + 4HCl → 2H2O + PbCl2 + Cl2 isA. Pb. B. O. C. H. D. Cl. would the
1. 1 answer
2. 1,362 views
What is occurring in the following reaction?H2 + Cl2 → 2HCl A. H2 is being reduced. B. Cl2 is being oxidized. C. H2 is gaining
1. 4 answers
2. 4,771 views
How would you classify a solution if [OH-] = 4.2 x 10-8 M?A. Acidic B. Basic C. Neutral D. It is impossible to tell based on the
1. 3 answers
2. 2,411 views
Which for the following is considered a weak base?A. Lithium hydroxide B. Aluminum hydroxide C. Sodium hydroxide D. Calcium
1. 1 answer
2. 1,349 views
Among the following Ka values, which represents the strongest acid?A. Ka = 1.2 x 10-3 B. Ka = 3.4 x 10-5 C. Ka = 8.7 x 10-8 D.
1. 1 answer
2. 4,526 views
In which of the following physical states does a given substance have the highest entropy?A. solid B. gas C. liquid D. all of
1. 2 answers
2. 927 views
Which of the following is the correct expression for the rate of the following reaction? Note: not all species are gaseous.CuO(s
1. 4 answers
2. 861 views