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Irina18 [472]
2 years ago
8

What are mand n in the rate law equation? Rate = k[A]”[B]"

Chemistry
1 answer:
frez [133]2 years ago
6 0

A (they are experimentally determined exponents)

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Americium-241 is used in smoke detectors. It has a first-order rate constant for radioactive decay of k = 1.6x10^−3yr−1. By cont
Vika [28.1K]

Answer:

A. 433 years and 63 days

B. Iodine

C. 0.125mg

D. 1.00mg

Explanation:

A. Americium

The formula of a radioactive decay constant half life is t = 0.693/k

Where k is the decay constant.

For americium, k = 0.0016

t = 0.693/0.0016 = 433.125 apprx 433 years

For iodine, k = 0.011

Half life = 0.693/0.011 = 63 days.

B. Iodine decays at a faster rate.

C. After three half lives

For both, first half life yields a mass of 0.5mg, next yields 0.25mg, next yield 0.125mg

D. 1.00mg still remains.

Half life is high for both so the decay after one day is insignificant.

4 0
3 years ago
The ease with which a raw material can be molded , flattened , or bent is known as its ?
Leya [2.2K]
A. Malleability

Ductility is being able to be drawn into wires
Elasticity is being able to resist stress
Resilience is being able to spring back into shape (kind of like elasticity)
6 0
3 years ago
Read 2 more answers
Complete the chemical reaction that occurs when dimethylamine (ch3)2nh reacts with water.
grandymaker [24]
Dimethyl amine is Base. The basic character of it is due to the presence of lone pair of electron on nitrogen atom. The strength of amines is basically due to the presence of alkyl group attached to nitrogen atom. These alkyl groups donates electron to nitrogen atom hence increasing electron density on nitrogen and increasing its basic character.

When dimethylamine ( Kb = 5.9 × 10⁻⁴) is reacted with water it abstracts proton from water molecule convertion it into Hydroxide Ion (i.e ⁻OH). The reaction is as follow,

                          (CH₃)₂N  +  H₂O   →   (CH₃)₂N⁺H   +   ⁻OH
3 0
3 years ago
In a longitudinal wave moving along a spring, what are areas where the coils are farthest apart called?
Sholpan [36]
Areas of rarefaction
7 0
2 years ago
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A new penny has a mass of 2.49 g and a volume of 0.349 cm3. Is the penny made of pure copper?
velikii [3]
Yes it is. Copper is the same mass and volume. Plus all pennies are made of copper
7 0
3 years ago
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