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2 years ago

How many elements does 3Fe2O3 have

Chemistry

2 answers:

KATRIN_1 [288]2 years ago

5 0

Answer:

I think 4 I can't remember

yaroslaw [1]2 years ago

5 0

I think it has two elements, those two elements being iron (Fe) and oxygen (O). It has a total of 15 atoms too, with 6 being iron atoms and 9 being oxygen atoms.

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In the reaction 2SO2(g) + O2(g) -> 2SO3(g) how many liters of oxygen are needed produced 4 liters of SO3 at STP?

Sophie [7]

Answer:

2 litres

Explanation:

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4 years ago

Which of the following must be true in order for a reaction to have no excess reactants?

o-na [289]

Answer:

C) Reactants must be present in the exact molar ratios in the balanced chemical equations.

Explanation:

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3 years ago

Is magnetic a physical or chemical property

weqwewe [10]

Magnetic is a physical property.

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3 years ago

A hydrate is determined to be 45.43% water and 54.57% CoCl. Find the chemical formula and name for this hydrate. (*Hint - assume

sdas [7]

Answer : The chemical formula for the given compound is $COCl_2.6H_2O$

Explanation : Given,

If percentage are given then we are taking total mass is 100 grams.

So, the mass of each element is equal to the percentage given.

Mass of $H_2O$ = 45.43 g

Mass of $COCl_2$ = 54.57 g

Molar mass of $H_2O$ = 18 g/mole

Molar mass of $COCl_2$ = 129.9 g/mole

To formulate the chemical formula, we need to follow some steps:

Step 1: Converting the given masses into moles.

Moles of water = $\frac{\text{Given mass of water}}{\text{Molar mass of water}}=\frac{45.43g}{18g/mole}=2.524moles$

Moles of $COCl_2$ = $\frac{\text{Given mass of }COCl_2}{\text{Molar mass of }COCl_2}=\frac{54.57g}{129.9g/mole}=0.4201moles$

Step 2: Calculating the mole ratio of the given molecule.

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 0.4201 moles.

For $H_2O$ = $\frac{2.524}{0.4201}=6.00\approx 6$

For Carbon = $\frac{0.4201}{0.4201}=1$

Step 3: Taking the mole ratio as their subscripts.

The ratio of $COCl_2:H_2O$ = 1 : 6

The chemical formula for the given compound is $(COCl_2)_1(H_2O)_6=COCl_2.6H_2O$

Hence, the chemical formula for the given compound is $COCl_2.6H_2O$

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4 years ago

This is the chemical formula for nickel tetracarbonyl (a powerfully poisonous liquid used in nickel refining) Ni(CO)4 A chemical

OverLord2011 [107]

Answer : The number of moles of oxygen present in a sample are 11.3 moles.

Explanation :

The given compound is, $Ni(CO)_4$

By the stoichiometry we can say that, 1 mole of of $Ni(CO)_4$ has 4 moles of CO.

Or we can say that, 1 mole of of $Ni(CO)_4$ has 1 mole of nickel (Ni), 4 moles of carbon (C) and 4 moles of oxygen.

That means,

Number of moles of carbon = Number of moles of oxygen

As we are given that:

Number of moles of carbon = 11.3 moles

So, number of moles of oxygen = number of moles of carbon = 11.3 moles

Therefore, the number of moles of oxygen present in a sample are 11.3 moles.

7 0

4 years ago