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Atomic masses

If a particular atom of Uranium 235 is struck by a neutron causing fission to occur, and two of the products are 3 neutrons and Krypton 93 What are the atomic number and mass number of the third product?

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

11257

OTA ID:

103897

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elements formed from supernova

Which element was probably NOT formed when a neutron star exploded as a supernova? a) Mn b) Cu c) Mo d) Ag e) Pb

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

11258

OTA ID:

103139

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Elements in atmosphere in pure form

Which group of elements is normally obtained from the atmosphere in pure form? a) sulfur, phosphorus, oxygen, nitrogen b) magnesium, sodium, calcium, strontium c) flourine, chlorine, neon, argon d) flourine, chlorine, oxygen, nitrogen e) oxygen, nitrogen, neon, argon

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

11259

OTA ID:

103060

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Ideal gas law problem; refer to the General Properties of Gases to review concepts and formulae related to ideal gases

A hydrogen gas thermometer is found to have a volume of 100.0 cm3 when placed in an ice-water bath at 0°C. When the same thermometer is immersed in boiling liquid chlorine, the volume of hydrogen at the same pressure is found to be 87.2 cm3. What is the temperature of the boiling point of chlorine?

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

11388

OTA ID:

103127

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Calorimetry and heat flow: calculation of basic thermodynamic quantities using simple "Coffee Cup" Calorimetry in the lab Refer to: bomb calorimetry and laws of thermochemistry

The following acid-base reaction is performed in a coffee cup calorimeter: H+(aq) + OH-(aq) --> H2O(l) The temperature of 110 g of water rises from 25.0°C to 26.2°C when 0.10 mol of H+ is reacted with 0.10 mol of OH-. Calculate qwater, Calculate ΔH for the reaction, Calculate ΔH if 1.00 mol OH- reacts with 1.00 mol H+!

Subject:

Chemistry

Topic:

General Chemistry

Posting ID:

11389

OTA ID:

103127

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