chemistry! URGENT

60,616 results, page 29

Chemistry

A cup of teat containing 400g of liquid at 20 degrees celsius was heated. If 58.5 kj of heat was absorbed by the tea, what would the final temperature be? Assume that the specific heat of the tea is the same as that of water (4.18). I am not sure how to start this problem. ...

Chemistry

The term mole is used in chemistry to define an amount of a substance. For example, a mole of glucose, blood sugar, weighs 180.16 grams. A common concentration unit for solutions is moles of substance per liter of solution. We abbreviate this with the symbol M. For example, 0....

Econ VERY URGENT, HELP!

Consider a simple economy consisting of only four firms. Firm A, a mining enterprise, extracts iron ore. Firm B, a Steelmaker, produces steel sheets. Firm C, a carmaker, makes automobile while Firm D produces automobile tires. In 2016, firm A extracts 50,000 tons of ores, ...

Majoooooor Help please please help me

Please can you give me what are the products , the colour of the flame, how does it react when : 1- Zinc reacting with oxygen Zinc reacting with air 2- Iron filings with oxygen Iron filings with air 3- Copper reacting with oxygen Copper reacting with air 4- Magnesuim reacting ...

Chemistry Lab

In chemistry we are doing a lab that involves crucibles and Mg ribbon, we have three days to complete the lab. Anyways do you think it would be alright to substitute the mass of the crucible we had the first day with the mass of the crucible we had today? We know how much the ...

Chemistry *DrBob222

Posted by Jamie on Sunday, June 20, 2010 at 3:36pm. You are given three test tubes that contain colourless liquid. One test tube contains benzene, another contains ethanol, and the third contains 2,4-hexadiene. Design a procedure that will tell you the contents of each test ...

Chemistry

I need serious help with 3 different chemistry problems: 1. If coal is assumed to be all carbon, carbon has a molecular weight of 12 lb-mass/lb-mol, and oxgyen (diatomic) has a molecular weight of 32 lb-mass/lb-mol, how much carbon dioxide (lb-mass/day) is produced in 171.4 lb...

Chemistry

Indicate how each of the following would affect the value of the absorbance (too high, too low, or not effect) of the indicated solution. I really need help. I do not understand these questions! This is from a chemistry activity to determine the unknown concentration of an ...

chemistry

I'm having trouble naming this organic chemistry compound. (I'm not sure how to include a picture in this, so I'll try my best to explain it in words and attempt to type it out) The full formula is C9H16. It's an alkyne and the longest carbon chain is 5 carbons long, so I know...

Chemistry II

What is the ^S for NaCl (l)?

MTI

what is chemistry

chemistry

what is a pi bond?

Chemistry

How do i solve [A]=[A]0 x e^-kt for k

chemistry

reinforcement??????????????????? help

Chemistry

What does "Kc" mean?

Chemistry

what is the pH of a 0.10 M NH3???

chemistry

what is the pH of a 0.10 M HC2H3O2

chemistry

How does pH = 8.75 give (H^+) = 1.77 x 10^-9.

chemistry

How does pH = 8.75 give (H^+) = 1.77 x 10^-9

science

chemistry help

chemistry

1000 mm = how many km

chemistry

.001 Ml= how many mL

chemistry

what's malleability

CHEMISTRY

10-g what does it mean?

chemistry

what is a compuond?

chemistry

what is an atom

chemistry

what is AL(MnO4)3

chemistry

What is iron

chemistry

what is mmHg?

chemistry

1.00 mole H2

AP Chemistry

Which value of Ke

chemistry

0.600 mL= L

chemistry

0.600 mL= L

chemistry

Al is the symbol for

chemistry

How many moles are there in 23.6g Ag?

Chemistry

What is C2H5OH?

chemistry

what is Ph of [H+] = 0.00010M?

chemistry

What is sulute

chemistry

what is the oxidation no of I3-

chemistry

Fe+O2+H2o - ??????????/

chemistry

what is the pH of 0.15 M NaF?

chemistry

28.06 mL to grams

chemistry

how to simplify (x 3-x)/(x-1)?

chemistry

how to simplify ((x^3)-x)/(x-1)

chemistry

what are isotopes???

chemistry

Ba Ba2+

Chemistry

What is a enantiomer?

chemistry

2 NO(g) + 1 O2(g) <==> 2 NO2(g)

chemistry

What is H+(aq) + –OH(aq) H2O(l)

chemistry

what is fe+s+hcl=

Chemistry

Find the Ph: of 7.01 x 10-5 M Ba(OH)2 thanks:)

chemistry

What is the pH of 6.6 X 10^4 M HCL?

chemistry

compare

chemistry

comparetheentrophybetweenco2gch4g

chemistry

S2(s)+H2(g)=H2S(g)

Chemistry

If 1 mg = 10^-3g and 1 Mg = 10^6g, how many milligrams are there in 0.25 Mg?

chemistry

WHAT IS HS2SO4

chemistry

WHat is a precipitate?

chemistry

44:65f

chemistry

44:65f

Chemistry

How do you convert 25.0 mg/mL to cc?

chemistry

what is saponication

chemistry

1228g/l to g/ml

chemistry

2L of 6M HCl

Chemistry

[H^+] = 2.7 x 10^-3 Calculate for [OH^-] [OH^-] = ? M

chemistry

Your percent

Chemistry

How do you get the pH 13.68 into OH^-^?

chemistry

Fe + K2CO3

chemistry

saADFFF

Chemistry

28g

chemistry

2.35*10^-4M,,Mg(OH)2 what is the pH of this solution

chemistry

AuCI,(aq)+Ca(s)=

Chemistry

What is 6.35 g divided by 6.02 x 10^23

chemistry

6.04g

chemistry

what is mass

chemistry

what is the pH of .10 M NH4CL?

chemistry

yrjtukj

chemistry

what is a positron

chemistry

wh at is prtoplam

chemistry

what is cryogenetics

Chemistry..

60.0 g O2=___________molecules O2

chemistry

how do you know that Al(OH)3(s) is a base?

AP Chemistry

The pH of a solution of Sr(OH)2 is 12.42. What is its (OH^-)

Chemistry 12

The [OH-] of a solution with a PH 5.75 is is it 5.6*10-9M?

chemistry

what is molality ?

chemistry

what is molality ?

chemistry

AMU ?

Chemistry

Define a.m.u?

Chemistry

Define a.m.u?

chemistry

what is equillibrium?

CHEMISTRY

WHAT IS ATOMICRADIUS

Chemistry

Answer

Chemistry

what are the products of Ca +H +OH-->?

Chemistry

What is a supernatant

chemistry

V1 = 0.55 L, P1 = 740 mm Hg, V2 = 0.79 L, P2 = ?

chemistry

50 compound

chemistry

na+c1-(aq)+hc1(aq)

chemistry

what is a catalyst

Chemistry AS

CALCULTE

chemistry

convert 3.0m to yd

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