Santiago

Most popular questions and responses by Santiago
1. Chemistry

How much heat is required to raise the temperature of 25g of aluminum from 25.0 C to 100 C? Convert this value to joules?

2. Chemestry

A sample of crude potassium iodide was analyzed using this reaction (not balanced): I- + SO42- I2 + H2S (acid solution) If a 4.19-g sample of crude KI produced 1.33 g of iodine, what is the percent purity of the KI?

3. Chemestry

What volume of 0.140 M K2Cr2O7 will be required to oxidize the Fe2+ ion in 81.5 mL of 0.176 M FeSO4 solution? Cr2O72- + Fe2+ Cr3+ + Fe3+ (acid solution)

4. Science

Which tool would you use to measure how long it takes a toy car to go down a ramp?

5. ME ENG

Hello. I need to prepare 1 liter of a buffer of 0.1M , pH=6.0. (Acid =HCl, base=Sodium tetraborate) I have in the lab: 320331 Sigma-Aldrich hydrochloric acid ACS reagent, 37% . and 221732 Sigma-Aldrich Sodium Tetraborate (Molecular Weight : 201.22 g/mol).

6. Algebra

which equation represents the line that passes the point (1,5) and has a slope of negative 2? a) y=2x+7 b) y=-2+11 c) y=2x-9 d) y=2x+3

7. pH preparation

Hello. I need to prepare 1 liter of a buffer of 0.1M , pH=6.0. (Acid =HCl, base=Sodium tetraborate) I have in the lab: 320331 Sigma-Aldrich hydrochloric acid ACS reagent, 37% . and 221732 Sigma-Aldrich Sodium Tetraborate (Molecular Weight : 201.22 g/mol).

8. math

What does the heart do?

1. math

Te amo :3

posted on June 1, 2018
2. Science

I think it's C personally tho.

posted on October 25, 2017
3. Science

That's my question, the answer choices are listed under my question.

posted on October 25, 2017
4. Science

A: ruler. B: Scale. C: meter stick. D: stopwatch.

posted on October 25, 2017
5. health

posted on March 18, 2016
6. HEALTH

i looked up the link and stiil don't get it Ms.Sue

posted on March 16, 2016
7. Algebra

a) was suppose to be -2x+7 so the answer would be a since it the answer is 5 right? thanks so much :)

posted on January 20, 2015
8. math

3/12

posted on February 11, 2014
9. AP PHYSICS MECH.

a) L=Iw L=(1/3 md^2)w b) L1=L2

posted on April 4, 2011
10. Spanish Essay: Looking for Corrections

I recommend the following website. Type spanishessays in google

posted on December 4, 2007