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Rom4ik [11]
3 years ago
10

Facts about the outer core

Chemistry
1 answer:
nirvana33 [79]3 years ago
7 0
The core of the Earth is the center. The inner core is solid, and is 90% iron. But the outer core is a liquid...
The outer core is made of a mixture of iron and nickel, with smaller amounts of silicon and oxygen.
The outer core officially begins at a depth of 2550 km below the surface of the Earth, down to a final depth of 4750 km at the boundary between the inner and outer core.
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The age of water or wine may be determined by measuring its radioactive tritium(3H) content. Tritium, present in a steady state
notsponge [240]

Answer: 29.0 years

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process  

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

t_{\frac{1}{2}}=\frac{0.693}{k}

k=\frac{0.693}{12.5years}=0.0554years^{-1}

b) for decomposition of 80 % of reactant

t=\frac{2.303}{0.0554}\log\frac{100}{100-80}

t=\frac{2.303}{0.0554}\log\frac{100}{20}

t=29.0 years

The age of a suspected vintage wine that is 20 % as radioactive as a freshlybottled specimen is 29.0 years

4 0
3 years ago
This law brings Boyle's, Charle's, Avogadro's, and Gay-Lussac's laws together in one neat, easy to use package: PV = nRT. Using
NikAS [45]

Answer:

22.4L

Explanation:

The following data were obtained from the question:

P = 1atm

T = 273K

n = 1mole

R = 0.08206 L∙atm/mol∙K

V =?

PV = nRT

V = nRT/P

V = (1 x 0.08206 x 273)/1

V = 22.4L

8 0
3 years ago
Solution that is used as the titrant (put in buret) in this experiment. Substance that gives the light pink end point in this ex
Alja [10]
E is the correct answer
6 0
3 years ago
Which acid is stronger: HBrO2 or HBrO3 ?
nignag [31]

Answer:

The stronger acid is HBrO3.

Explanation:

It has an additional oxygen making it more electronegative, in turn making it a stronger acid.

8 0
3 years ago
What happens to an object as its thermal energy increases?
aleksandr82 [10.1K]

Answer:

It heats up

Explanation:

7 0
2 years ago
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