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3 years ago

What are two types of matter are pure substances

Chemistry

1 answer:

Marta_Voda [28]3 years ago

4 0

Answer:

Elements and compounds are two types of pure substances.

Explanation:

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Equation balancing

meriva

Answer:

For a: The balanced equation is $2S(s)+3O_2(g)\rightarrow 2SO_3(g)$

For c: The balanced equation is $2NaOH(s)+H_2SO_4(aq)\rightarrow Na_2SO_4(aq)+2H_2O(l)$

Explanation:

A balanced chemical equation is one where all the individual atoms are equal on both sides of the reaction. It follows the law of conservation of mass.

For (a):

The given unbalanced equation follows:

$S(s)+O_2(g)\rightarrow SO_3(g)$

To balance the equation, we must balance the atoms by adding 2 infront of both $S(s)$ and $SO_3$ and 3 in front of $O_2$

For the balanced chemical equation:

$2S(s)+3O_2(g)\rightarrow 2SO_3(g)$

For (b):

The given balanced equation follows:

$2Al(s)+3Cl_2(g)\rightarrow 2AlCl_3(s)$

The given equation is already balanced.

For (c):

The given unbalanced equation follows:

$2NaOH(s)+H_2SO_4(aq)\rightarrow Na_2SO_4(aq)+H_2O(l)$

To balance the equation, we must balance the atoms by adding 2 infront of $H_2O(l)$

For the balanced chemical equation:

$2NaOH(s)+H_2SO_4(aq)\rightarrow Na_2SO_4(aq)+2H_2O(l)$

For (d):

The given balanced equation follows:

$C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(g)$

The given equation is already balanced.

4 0

3 years ago

Which of the following is true about a system at equilibrium? a The concentration(s) of the reactant(s) is equal to the concentr

anyanavicka [17]

Answer:

c The concentration(s) of reactant(s) is constant over time.

Step-by-step explanation:

When the reaction A ⇌ B reaches equilibrium, the concentrations of reactants and products are constant over time.

a is wrong, because the concentrations of reactants and products are usually quite different.

b is wrong, because both product and reactant molecules are being formed at equilibrium.

d is wrong. The rates of the forward and reverse reactions are equal, but they are not zero.

6 0

3 years ago

Which is an advantage of biomass energy?

mylen [45]

Answer:

A. It's a 'clean' energy. Your cooch need a cleanup

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4 years ago

Calculate the volume of 2.65 moles of N2O gas at STP.

Reptile [31]

Answer:

63.6 dm³

Explanation:

Volume of gas= no. of moles ×24dm³

Thus, volume of N₂O

= 2.65 × 24

= 63.6 dm³

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4 years ago

C-12, c-13, and c-14 have the same number of protons but different numbers of neutrons so they are

laiz [17]

Atoms with the same number of protons, but different numbers of neutrons are isotopes of the same element.

6 0

3 years ago