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3 years ago

Do metals dissolve in water

Chemistry

2 answers:

Oksanka [162]3 years ago

4 0

I think they dont

Explanation:

so I guess metals don't dissolve in water

Nady [450]3 years ago

3 0

yes

include sodium and potassium, dissolve instantly and dramatically in plain water — no stronger acid is needed. The metals react violently with water, releasing and igniting hydrogen gas and causing an explosion.

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t 745 K, the reaction below has an equilibrium constant (Kc) of 5.00 × 102. H2 (g) + I2 (g) ⇌ 2 HI (g) If a mixture of 0.10 mol

spayn [35]

Answer : The concentration of HI (g) at equilibrium is, 0.643 M

Explanation :

The given chemical reaction is:

$H_2(g)+I_2(g)\rightarrow 2HI(g)$

Initial conc. 0.10 0.10 0.50

At eqm. (0.10-x) (0.10-x) (0.50+2x)

As we are given:

$K_c=5.00\times 10^2$

The expression for equilibrium constant is:

$K_c=\frac{[HI]^2}{[H_2][I_2]}$

Now put all the given values in this expression, we get:

$5.00\times 10^2=\frac{(0.50+2x)^2}{(0.10-x)\times (0.10-x)}$

x = 0.0713 and x = 0.134

We are neglecting value of x = 0.134 because the equilibrium concentration can not be more than initial concentration.

Thus, we are taking value of x = 0.0713

The concentration of HI (g) at equilibrium = (0.50+2x) = [0.50+2(0.0713)] = 0.643 M

Thus, the concentration of HI (g) at equilibrium is, 0.643 M

8 0

4 years ago

Calculate the percentage by mass of the indicated element in the following compounds. Hydrogen in ascorbic acid, HC6H7O6, also k

Scorpion4ik [409]

Answer: The mass percent of hydrogen in ascorbic acid is 4.5 %

Explanation:

In $C_6H_8O_6$ , there are 6 carbon atoms, 8 hydrogen atoms and 6 oxygen atoms.

To calculate the mass percent of element in a given compound, we use the formula:

$\text{Mass percent of hydrogen}=\frac{\text{Mass of hydrogen}}{\text{Molar mass of ascorbic acid}}\times 100$

Mass of hydrogen = $8\times 1g/mol=8g$

Molar Mass of ascorbic acid = $6\times 12g/mol+8\times 1g/mol+6\times 16g/mol=176g$

Putting values in above equation, we get:

$\text{Mass percent of hydrogen}=\frac{8g}{176}\times 100=4.5\%$

Hence, the mass percent of of hydrogen in ascorbic acid is 4.5 %.

8 0

3 years ago

1. When recommending solutions to decrease human impact, which location were you able to make the greatest positive impact? Plea

Contact [7]

Answer: hope it help

Explanation:

1. I assume that it is possible to create the most beneficial consequences in rural zones where agricultural production is concentrated in the region as solutions are placed in place to reduce the human effect on nature. That is because agriculture is a practice that has a huge effect so it is important to protect the climate and nature so that farming can continue.

2. The first suggestion I make to my group is that limited waste disposal should be used. This will encourage any recycled material to have no association with products that would stop recycling. When the love is recycled,

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3 years ago

Which diagram is correct

elixir [45]

Answer:

The answer to the question is option <u>D</u>

6 0

2 years ago

Which of these is an example of a physical change ?

Gre4nikov [31]

It's 1. Melting a substance. The rest are chemical changes

8 0

4 years ago