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Help with lab equation regarding atomic mass

Initial temp. of 100 gm of Fe: 20 degrees Celsius Final temp. of 100 gm of Fe : 100 degrees Celsius Initial temp. of 250 ml of water: 20 degrees Celsius Final temp. of 250 ml of water: 25 degrees Celsius 1. Find the estimate of the specific heat for the metal. (use 1 cal/gm *C for water) 2.Estimate the atomic weight of the Fe.

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

10949

OTA ID:

103139

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Which one is Acidic or basic or neutral?

Will 0.10 M aqueous solutions of the following salts be acidic ("A"), basic ("B") or neutral ("N") (Assume a solution is neutral if its pH is 7.00 plus or minus 0.05). A. disodium hydrogen citrate B. sodium dihydrogen citrate C. sodium sulfate D. ammonium dihydrogen phosphate E. ammonium cyanide F. ammonium hydrosulfide * Could you explain how you did it?

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

11135

OTA ID:

102862

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What is the molarity of the solution? (i.e. [HA]+[A-].)

An aqueous solution of a monoprotic acid ("HA"; Ka = 3.82à—10-1) has a pH of 3.93. What is the molarity of the solution? (i.e. [HA]+[A-].)

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

11136

OTA ID:

102862

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Calculate Ka for a monoprotic acid

In a 4.03 * 10-2 M solution of a monoprotic acid, the percent dissociation is 49.6. Calculate Ka for this acid.

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

11137

OTA ID:

103234

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Carbon-14 content

The age of a piece of wood from an ancient source is determined by carbon dating. The carbon-14 content of a sample of the wood is found to be one-fourth that of living trees. The half life of carbon-14 is 5730 years. How old is the piece of wood?

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

11256

OTA ID:

102862

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