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4 years ago

1. How would you explain that energy in animals' food was once energy

Chemistry

2 answers:

AleksAgata [21]4 years ago

8 0

Answer:

Explanation: That energy inanimals food, used for body repair,growth, motion .It maintain body warmth, once energy from the sun.

Tju [1.3M]4 years ago

4 0

Answer:

The energy released from food was once energy from the sun that was captured by plants in the chemical process that forms plant matter (from air and water). Food provides animals with the materials they need for body repair and growth and the energy they need to maintain body warmth and for motion.

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SashulF [63]

This is not the best way to organize a periodic table because two elements might have similar atomic mass.

<h3>What is periodic table?</h3>

Periodic table is a chart in which arrangement of chemical elements are done.

In the early periodic table elements are arranged on the basis of their atomic masses, while after sometime Moseley arranged the periodic table on the basis of atomic number as he proposed that properties of an element is justified on the basis of number if electrons.

And mass of two substances may be same so it is difficult to differentiate between them.

Hence, two elements might have similar atomic mass.

To know more about periodic table, visit the below link:

brainly.com/question/14514242

#SPJ1

6 0

2 years ago

The free energy of formation of nitric oxide, NO, at 1000 K (roughly the temperature in an automobile engine during ignition) is

Assoli18 [71]

<u>Answer:</u> The value of $K_p$ for the chemical equation is $8.341\times 10^{-5}$

<u>Explanation:</u>

For the given chemical equation:

$N_2(g)+O_2(g)\rightarrow 2NO(g)$

To calculate the $K_p$ for given value of Gibbs free energy, we use the relation:

$\Delta G=-RT\ln K_p$

where,

$\Delta G$ = Gibbs free energy = 78 kJ/mol = 78000 J/mol (Conversion factor: 1kJ = 1000J)

R = Gas constant = $8.314J/K mol$

T = temperature = 1000 K

$K_p$ = equilibrium constant in terms of partial pressure = ?

Putting values in above equation, we get:

$78000J/mol=-(8.314J/Kmol)\times 1000K\times \ln K_p\\\\Kp=8.341\times 10^{-5}$

Hence, the value of $K_p$ for the chemical equation is $8.341\times 10^{-5}$

4 0

4 years ago

PLEASE HELP!

noname [10]

Your answer should be A and B

7 0

3 years ago

Applying the rules of significant figures, which of the following would be the correct value for the density of a substance whic

lilavasa [31]

16 g/ml

<h3>Further explanation</h3>

Given

mass = 32.40 g

volume = 2.0mL

Required

Density

Solution

Density is a quantity derived from the mass and volume

Density is the ratio of mass per unit volume

Density formula:

$\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}$

ρ = density

m = mass

v = volume

Input the value :

ρ = 32.40 g / 2.0 ml

ρ = 16.2 g/ml

Rules for division: The least number of significant figures in the problem determines the number of significant figures in the answer.

32.40 = 4 sig.fig

2.0 = 2 sig fig

The answer must be 2 sig fig

So the answer = 16 g/ml

6 0

3 years ago

When CO(g) reacts with O2(g) according to the following reaction, 283 kJ of energy are evolved for each mole of CO(g) that react

marissa [1.9K]

Answer:

2CO + O₂ → 2CO₂ ΔH = -566 kj

Explanation:

Given data:

Energy evolved when 1 mole of CO react = 283 Kj

Energy evolved when 2 mole of CO react = ?

Solution:

Chemical equation:

2CO + O₂ → 2CO₂

It is given when one mole of CO react with oxygen 283 KJ energy is produced.

When 2 mole react,

2 ×-283 kj = -566 kj

Thermal equation:

2CO + O₂ → 2CO₂ ΔH = -566 kj

8 0

4 years ago