All categories

3 years ago

What two elements make up the most of the earth's core

Chemistry

1 answer:

podryga [215]3 years ago

7 0

Answer:

The Earth's core is mainly made of iron and nickel.

Explanation:

You might be interested in

2) In a calorimetry experiment, 70.0 g of a substance was heated to

Aloiza [94]

The temperature at thermal equilibrium : 16.1 °C

<h3>Further explanation</h3>

Q absorbed = Q released

Heat can be formulated :

Q = m.c.Δt

c= specific heat, J/g°C

Δt = temperature different, C°

m= mass, g

Q water=Q substance

$\tt 3500\times 4.18\times (t_2-15)=70\times 0.89\times (270-t_2)\\\\14630(t_2-15)=62.3(270-t_2)\\\\14630t_2-219450=16821-62.3t_2\\\\14692.3t_2=236271\\\\t_2=16.1^oC$

8 0

3 years ago

Curious Carl and his lab partner were handed a 2 liter sealed flask containing two gases, neon and argon. The partial of each ga

stiv31 [10]

Answer:

it's difficult but i think the answer is

3 0

3 years ago

Who discovered copper and in what year?

Vesnalui [34]

8,700 B.C.
No clue who discovered it.

4 0

3 years ago

Read 2 more answers

In the citric acid cycle, malate is dehydrogenated to oxaloacetate in a highly endergonic reaction with a ΔG’o of +30 kJ mol-1:

Doss [256]

Answer : The value of $K_{eq}$ of this reaction is, $5.51\times 10^{-6}$

At equilibrium, [L-malate] > [oxaloacetate]

Explanation :

The relation between the equilibrium constant and standard Gibbs free energy is:

$\Delta G^o=-RT\times \ln K_{eq}$

where,

$\Delta G^o$ = standard Gibbs free energy = +30 kJ/mol = +30000 J/mol

R = gas constant = 8.314 J/K.mol

T = temperature = $25^oC=273+25=298K$

$K_{eq}$ = equilibrium constant = ?

The given reaction is:

$\text{L-malate}+NAD^+\rightleftharpoons \text{oxaloacetate}+NADH+H^+$

$\Delta G^o=-RT\times \ln K_{eq}$

$+30000J/mol=-(8.314J/K.mol)\times (298K)\times \ln K_{eq}$

$K_{eq}=5.51\times 10^{-6}$

Therefore, the value of $K_{eq}$ of this reaction is, $5.51\times 10^{-6}$

As, the value of $K_{eq}$ < 1 that means the reaction mixture contains reactants.

At equilibrium, [L-malate] > [oxaloacetate]

7 0

4 years ago

The pressure inside a gas cylinder is 3,506 mmHg. How many atmospheres of pressure is the gas exerting on the cylinder?

PSYCHO15rus [73]

Below are the choices:

a)0.2168 atm
<span>b)4.613 atm </span>
<span>c)34.60 atm </span>
<span>d467.4 atm
</span>
1 atm = 760mmHg : Therefore:
<span>3,506mmHg = 3,506/760 = 4.613 atm
</span>B is correct answer.

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

7 0

3 years ago

Read 2 more answers

What two elements make up the most of the earth's core​

What two elements make up the most of the earth's core