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sasho [114]
2 years ago
10

Which of the following is not radiation ? A. baking in a metal pan in the oven , B. heat from a fire , C. microwaving food , or

D. suns rays

Chemistry
2 answers:
Dmitrij [34]2 years ago
7 0

Answer:

A. because it is conduction the transfer of heat through touching solids. Microwaving is wrong because rays of heat warm up the food. Radiation is the transfer through rays/gases.

Explanation:

IRISSAK [1]2 years ago
5 0

Answer:

C.

Explanation:

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(a) 4.64 x 1024 atoms Bi into grams
nexus9112 [7]

Answer:

1610.7 g is the weigh for 4.64×10²⁴ atoms of Bi

Explanation:

Let's do the required conversions:

1 mol of atoms has 6.02×10²³ atoms

Bi → 1 mol of bismuth weighs 208.98 grams

Let's do the rules of three:

6.02×10²³ atoms are the amount of 1 mol of Bi

4.64×10²⁴ atoms are contained in (4.64×10²⁴ . 1) /6.02×10²³ = 7.71 moles

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7.71 moles of Bi must weigh (7.71 . 208.98 ) /1 = 1610.7 g

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