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4 years ago

What is meant by the term compound? Provide an example

Chemistry

1 answer:

PIT_PIT [208]4 years ago

6 0

Answer:

I hope it helps

Explanation:

When two or more elements chemically combine in a fixed ratio by mass, the obtained product is known as a compound. Compounds can be defined as substances consisting of 2 or more different types of elements in a fixed ratio of its atoms. When the elements combine, some individual property of the elements is lost and the newly formed compound has new properties.Chemical Formula: Compounds are represented by their chemical formula. A chemical formula is a symbolic representation of the proportions of atoms that constitute a particular chemical compound.The chemical formula of water is H2O which shows two atoms of hydrogen and one atom of oxygen have combined to form one molecule of H2O. The chemical formula for common salt is NaCl which shows one atom of sodium and one atom of chlorine combine to form one molecule of NaCl.

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A piece of stainless steel with a mass of 25.0 g has a temperature of 50.0°

Darina [25.2K]

Answer:

0.336 J/g/C

Explanation:

Recall the equation for specific heat:

q = mcΔT

1250 = 25 x c x 149

c = 0.336

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3 years ago

If 14 moles of oxygen react with 14 moles of hydrogen to produce water, what is the

Leokris [45]

Hydrogen is the limiting reactant because when doing a stoichiometry equation for the reactants, hydrogen will be used completely by having a smaller yield and oxygen will be excess (7 moles to be exact)

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3 years ago

What is the mass of 1.6x1020 molecules of carbon dioxide?

valentina_108 [34]

Answer:

$1.2*10^{-2} g$

Explanation:

$1 mol - 6*10^{23} particles$

$1.6*10^{20}* \frac{1 mol}{6.02*10^{23}} = 0.00026578 mol\\\\M(CO2) = 12 + 2*32=44 \frac{g}{mol}\\$

$44\frac{g}{mol} *0.00026578 mol =0.012 = 1.2*10^{-2} g$

8 0

3 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]

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

Explanation:

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

1) what causes the magnetic fields on the sun?

mr Goodwill [35]

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4 years ago