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3 years ago

26. Your mother will soon undergo some medical testing that will require her to swallow a radioactive

Chemistry

1 answer:

jeyben [28]3 years ago

8 0

Answer:

Most radioactive materials decay and they mostly have a decay rate. The time it takes for half of a radioactive material to decay is called half life.

The 7 minute significance of half-life simply points to the total time it takes after which half of the radioactive material would have completely decayed,

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1-bromo-2-chloro-4-propylpentene

Nonamiya [84]

..:)../:................

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3 years ago

a reaction in which one element replaces another on a compound or in which two elements in different compounds trade places is c

lilavasa [31]

Single Replacement and Double Replacement reactions

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4 years ago

Heat is most closely related to which kind of energy?

Ray Of Light [21]

Answer:

thermal

Explanation:

thermal energy relates to heat and temperatures

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3 years ago

Is the ability to tarnish a physical or chemical property

Damm [24]

Answer:

$\boxed{\text{Chemical; physical; chemical}}$

Explanation:

Tarnish ing

Tarnishing is a chemical property.

One substance changes into another substance with different properties. For example, the tarnish on silverware is formed by the reaction of silver with hydrogen sulfite to form black silver sulfide.

2Ag + H₂S ⟶ Ag₂S + H₂

Freezing

Freezing is a physical property, because the composition of the substance does not change. After liquid water has frozen to ice, it is still water, but in the solid state.

H₂O(ℓ) ⇌ H₂O(s)

Rusting

Rusting is a chemical property, because a new substance with different properties is formed.

A simple equation for the formation of rust is

2 Fe + 3O₂ + H₂O ⟶ Fe₂O₃·H₂O

5 0

3 years ago

A food worker had safely cooled a large pot of soup to 70 F (21 C) with two hours. What temperature must the soup Reach in the f

padilas [110]

The temperature reached after four hours of cooling is 140 F (or) 42 C.

Explanation:

A food worker cooled a cup of soup for two hours,

step 1: The temperature reached in two hours= 70 F (or) 21 C

step 2: Then for four hours, it is twice the value

∴ The temperature reached in four hours= 2(70)= 140 F (or) 2(21)= 42 C

4 0

3 years ago