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WINSTONCH [101]
3 years ago
14

Why are state symbols used in chemical equations

Chemistry
1 answer:
Anettt [7]3 years ago
3 0

B.They identify what phase the substances are in.

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The color, shape, volume, mass, etc.
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You wish to make 250. mL of 0.20 M KCl from a stock solution of 1.5 M KCl and DI water.
Nitella [24]

The question requires us to use the dilution formula M_iV_i=M_fV_f, where M_i and V_i are the stock concentration and volume respectively, then M_f and V_f are the dilute concentration and volume respectively.

a. C_s_t_o_c_k= 1.5 M KCI, C_d_i_l_u_t_e=0.20M KCl, V_d_i_l_u_t_e=250ml KCl

b.M_iV_i=M_fV_f\\\implies V_i= \frac{M_fV_f}{M_i} = \frac{0.20M \times 250ml}{1.5M} = 33.3\ ml

To prepare the solution 33.3ml of 1.5M KCl is diluted to a total final volume of 250ml.


8 0
4 years ago
If you have 10.0 g of hydrogen and 5.0 g of oxygen, what mass of the excess reagent remains after the completion of the reaction
mario62 [17]

mass Hydrogen=9.376 g

<h3>Further explanation </h3>

Reaction

2H₂+O₂⇒2H₂O

mass H₂ = 10 g

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 10 : 2 = 5

mass O₂=5 g

mol O₂(MW=32 g/mol) :

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mol H₂: mol O₂ = 2: 1, so mol H₂ :

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mol H₂ :

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mass of H₂ :

4.688 x 2 =9.376 g

 

<h3 />

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3 years ago
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<u>Explanation:</u>

<u>Similarity:</u>

Both Fission and Fusion are nuclear reactions that releases vast amount of energy.

<u>Difference:</u>

  • Fission is the splitting of heavier nucleus into lighter nuclei which generates maximum amount of energy whereas fusion is the combining 2 lighter nuclei to form a heavier nucleus and makes a vast energy.
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