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3 years ago

10

Calcium and titanium atoms have the same mass

1 answer:

timofeeve [1]3 years ago

7 0

Answer:

these elements do not have the same masses.

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Which property makes a compound easier to boil?

ValentinkaMS [17]

Viscosity will be your answer

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3 years ago

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Why is saturated sodium chloride solution (also known as brine) used?

charle [14.2K]

B is the answer
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3 years ago

Problem PageQuestion Iron(III) oxide and hydrogen react to form iron and water, like this: (s)(g)(s)(g) At a certain temperature

Marrrta [24]

Complete question

The complete question is shown on the first uploaded image

Answer:

The value is $K_c = 2.69 *10^{-5}$

Explanation:

From the question we are told that

The equation is

$Fe_20_3_{(s)}+3H_{(g)}\to2Fe_{(s)}+3H_2O_{(g)}$

Generally the equilibrium is mathematically represented as

$K_c = \frac{[H_2O]^2}{[H_2]^3}$

Here $[H_2O]$ is the concentration of water vapor which is mathematically represented as

$[H_2O ] = \frac{n_w}{V_s }$

Here $V_s$ is the volume of the solution given as 8.9 L

$n_w$ is the number of moles of water vapor which is mathematically represented as

$n_w = \frac{m_w}{Z_w}$

Here $m_w$ is the mass of water given as 2.00 g

and $Z_w$ is the molar mass of water with value 18 g/mol

So

$n_w = \frac{2}{18}$

=> $n_w = 0.11 \ mol$

So

$[H_2O ] = \frac{0.11}{8.9 }$

=> $[H_2O ] = 0.01236 \ M$

Also

$[H]$ is the concentration of hydrogen gas which is mathematically represented as

$[H ] = \frac{n_v}{V_s }$

Here $V_s$ is the volume of the solution given as 8.9 L

$n_v$ is the number of moles of hydrogen gas which is mathematically represented as

$n_v = \frac{m_v}{Z_v}$

Here $m_w$ is the mass of water given as 4.77 g

and $Z_v$ is the molar mass of water with value 2 g/mol

So

$n_w = \frac{4.77}{2}$

=> $n_w = 2.385 \ mol$

So

$[H_2O ] = \frac{2.385}{8.9 }$

=> $[H_2O ] = 0.265 \ M$

So

$K_c = \frac{( 0.01236 )^3}{ (0.265 )^2}$

=> $K_c = 2.69 *10^{-5}$

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3 years ago

What is the name of the group 8 elements and what makes them special?

Illusion [34]

Iron, Ruthenium, Osmium, and Hassium.

They're transition metals

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3 years ago

How many moles of carbon are in a sample of 21.45 moles of heptane(C7H16)???????

saw5 [17]

The moles of carbon that are in the sample of 21.45 moles of heptane(C₇H₁₆) is 150.15 moles

<u><em>calculation</em></u>

moles of carbon = moles of heptane × number of C atom

number of C atom in heptane = 1 ×7 = 7 atoms

moles is therefore = 21.45 moles × 7 =150.15 moles

3 0

3 years ago

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