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3 years ago

Oceanography does not include the study of which of the following topics?

Chemistry

1 answer:

MrRissso [65]3 years ago

5 0

Answer:

A. The relationship between the Sun,Moon,and Earth

Explanation:

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Which of the following is not equal 225 g?

vekshin1

G to dkg is 1 place to the right, move the decimal point 1 place to the left
225 g = 22.5 dkg
C is the answer

3 0

4 years ago

Read 2 more answers

Steam reforming of methane ( CH4 ) produces "synthesis gas," a mixture of carbon monoxide gas and hydrogen gas, which is the sta

sertanlavr [38]

Answer: The pressure equilibrium constant for the reaction is $4.5\times 10^0$

Explanation:

We are given:

Initial partial pressure of methane = 0.60 atm

Initial partial pressure of water vapor = 2.6 atm

Equilibrium partial pressure of hydrogen gas = 1.4 atm

The chemical equation for the reaction of methane gas and water vapor follows:

$CH_4+H_2O\rightleftharpoons CO+3H_2$

Initial: 0.60 2.6

At eqllm: 0.60-x 2.6-x x 3x

Evaluating the value of 'x':

$\Rightarrow 3x=1.4\\\\x=0.467$

So, equilibrium partial pressure of methane gas = (0.60 - x) = [0.60 - 0.467] = 0.133 atm

Equilibrium partial pressure of water vapor = (2.6 - x) = [2.6 - 0.467] = 2.133 atm

Equilibrium partial pressure of carbon monoxide gas = x = 0.467 atm

The expression of $K_p$ for above equation follows:

$K_p=\frac{p_{CO}\times (p_{H_2})^3}{p_{CH_4}\times p_{H_2O}}$

Putting values in above equation, we get:

$K_p=\frac{0.467\times (1.4)^3}{0.133\times 2.133}\\\\K_p=4.517\times 10^0$

Hence, the pressure equilibrium constant for the reaction is $4.5\times 10^0$

8 0

3 years ago

How many grams of CaF2 would be needed to produce 1.23 moles of F2?

NemiM [27]

We see from the chemical formula itself that there is 1 mole of F2 for every 1 mole of CaF2, hence the number of moles of CaF2 is also:

moles CaF2 = 1.23 moles

The molar mass of CaF2 is 78.07 g/mol, so the mass is:

mass CaF2 = 78.07 g / mol * 1.23 mol

mass CaF2 = 96.03 grams

5 0

3 years ago

After the food has been chewed and lubricated, it is pushed by the tongue into the___________.

MrRissso [65]

The answer is pharynx

6 0

3 years ago

Read 2 more answers

1) A 10g sample of H2(g) reacts with a 22g sample of O2(g) according to

solmaris [256]

Answer:

H₂ is excess reactant and O₂ the limiting reactant

Explanation:

Based on the chemical reaction:

2H₂(g) + O₂(g) → 2H₂O

2 moles of H₂ react per mole of O₂

To find limiting reactant we need to convert the mass of each reactant to moles:

Moles H₂ -Molar mass: 2.016g/mol-:

10g H₂ * (1mol / 2.016g) = 4.96 moles

Moles O₂ -Molar mass: 32g/mol-:

22g O₂ * (1mol / 32g) = 0.69 moles

For a complete reaction of 0.69 moles of O₂ are needed:

0.69mol O₂ * (2mol H₂ / 1mol O₂) = 1.38 moles of H₂

As there are 4.96 moles,

<h3>H₂ is excess reactant and O₂ the limiting reactant</h3>

7 0

3 years ago