# Search:

Type: Posts; User: bluedicius

1. ## Question: Investing

by bluedicius
2
Views
1,556

### investing

If I invest \$5000 in a savings bond, earning 7% interest per year. What is an equation I could write that would express the compound amount of the bond for any given year? What will the compound...
2. ## Question: Exponential decay

by bluedicius
1
Views
2,168

### exponential decay

The radioactive decay formula is A = A0(1/2)^t/n, where A is the current amoutn of the radioactive sample, A0 is the original amount, t is the elapsed time and n is the length of the half life.
...
3. ## Question: Buffer solution

by bluedicius
1
Views
2,684

### Buffer solution

I am trying to do a buffer solution of sodium hydrogen phosphate and sodium dihydrogen phosphate but they won't dissolve. My solvent is H20 and both are soluble in water. Why would this be? What...
4. ## Question: Reactions

by bluedicius
1
Views
1,768

### Reactions

Are these substitution or addition reactions? How can you tell and determine this? What are the products?

Trichloromethane + chlorine -->
Propene + bromine -->
Ethylene + hydrogen iodide -->...
5. ## Question: Testing solutions

by bluedicius
0
Views
984

### testing solutions

What mass of precipitate is produced by the reaction of 20.0mL of 0.210 mol/L sodium sulfide with an excess quantity of aluminum nitrate solution?

The two solutions provided react with each other...
6. ## Question: Gas and solution stoichiometry

by bluedicius
2
Views
3,256

### Gas and solution stoichiometry

What volume of carbon dioxide gas at 100kPa and 35C is produced by the complete reaction of 50mL of a 0.200 mol/L baking soda solution with excess hydrochloric acid?
...
7. ## Question: Inequality problems

by bluedicius
2
Views
12,532

### Thank you, you've helped me out a lot, I really...

Thank you, you've helped me out a lot, I really appreciate it.
8. ## Question: Inequalities

by bluedicius
3
Views
1,979

### That helped me a lot, thank you.

That helped me a lot, thank you.
9. ## Question: [HELP]gr11 chemistry - predicting chemical reactions and balancing chemical equations

by bluedicius
5
Views
18,728

### Okay

All right, good luck. There are some good sites with tutors, but I don't know the names right now.
10. ## Question: [HELP]gr11 chemistry - predicting chemical reactions and balancing chemical equations

by bluedicius
5
Views
18,728

### Tutor

You want to find a tutor?
11. ## Question: [HELP]gr11 chemistry - predicting chemical reactions and balancing chemical equations

by bluedicius
5
Views
18,728

### Reaction type

Reaction type is pretty straight forward, there are key things to look for.
Anything dealing with propane or a gas will most likely be a combustion reaction. Another way to know is that a...
12. ## Question: Strontium nitrate reacts

by bluedicius
0
Views
1,295

### strontium nitrate reacts

Mass of 250 mL beaker = 102.41 g
Mass of 250 mL beaker + Sr(NO3)2(s) = 104.41 g
Mass of 150 mL beaker = 68.83 g
Mass of 150 mL beaker + CuSO4-->5H2O(s) = 71.39 g
Mass of filter paper = 0.90 g...
13. ## Question: Chemical analysis

by bluedicius
0
Views
1,019

### Chemical analysis

In a chemical analysis, a technician mixes silver nitrate solution with excess sodium chromate solution to produce 2.89g of precipitate. What mass of silver nitrate was present in the original...
14. ## Question: Percentage error

by bluedicius
1
Views
10,052

### Percentage error

The volume of a sphere is 3500 cm3 + 1.8%.
What are the possible maximum and minimum lengths of the radius?
Calculate the radius and its percentage error.
15. ## Question: Inequality problems

by bluedicius
2
Views
12,532

### Inequality problems

A type of cake requires 150g of flour. Another requires 750g of flour. At most, 2.25kg of flour is available, how do you represent this in an inequality?

A dog owner wants to build a rectangular...
16. ## Question: Inequalities

by bluedicius
3
Views
1,979

### inequalities

What is the ordered pair solution for -3x+y > 6?
What is the ordered pair solution for 4x - 5y + 20 < 0 ?
17. ## Question: Gravimetric stoichiometry

by bluedicius
4
Views
5,265

### Steps

Thank you so much for all your help. Are there any easy to follow steps or a procedure to follow when doing stoichiometry questions and formulas like these? How do you know you have the right...
18. ## Question: Gravimetric stoichiometry

by bluedicius
4
Views
5,265

### Gravimetric stoichiometry

Powdered zinc metal reacts violently with S8 when heated. Predict the mass of sulfur required to react with 25g of zinc.

Bauxite contains aluminum oxide, which is decomposed using electricity to...
19. ## Question: Mass

by bluedicius
4
Views
2,977

### Chemical analysis

Samples of two different lead(II) nitrate solutions are used, each sample is reacted with an excess quatity of a potassium iodide solution, producing lead(II) iodide, which has a low solubility and...
20. ## Question: Reactions

by bluedicius
1
Views
1,803

### Reactions

What are the balanced chemical reactions and types of reactions for these:

Carbon monoxide and iron(III) oxide react to produce iron and carbon dioxide.

Aluminum and copper(II) sulphate react...
21. ## Question: Mass

by bluedicius
4
Views
2,977

### Mass

What mass of lead(II) nitrate is present in 20.0mL of a solution?
See below.
Two different lead(II) nitrate solutions are used, each sample is reacted with an excess quantity of a potassium iodide...
22. ## Question: Precipitation

by bluedicius
2
Views
1,450

### precipitation

What balanced equation do you get when you add colorless sodium hydroxide to blue copper (II) nitrate to produce a light blue precipitate?
23. ## Question: Moles

by bluedicius