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3 years ago

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Iron reacts with oxygen to produce iron(iii) oxide.4 fe(s) + 3 o2(g) → 2 fe2o3(s)if 6.4 moles of fe react with excess o2, how ma

ny moles of fe2o3 can be formed?a. 1.6 molb. 2.4 molc. 3.2 mold. 4.3 mole. 6.4 mol

1 answer:

sattari [20]3 years ago

4 0

3.2mol
hope it can help you

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Convert 9.32x 10 23ª atoms of au to moles of au

7nadin3 [17]

Answer:

$\huge\boxed{\sf no.\ of\ moles = 1.55\ moles }$

Explanation:

<u>Given:</u>

Number of atoms = $9.32 \times 10^{23}$ atoms

Avogadro's Number = $6.023 \times 10^{23}$ atom / mol

<u>Required:</u>

Moles = ?

<u>Formula:</u>

$\displaystyle No.\ of\ moles = \frac{no. \ of \ atoms }{avogadro's \ no.}$

<u>Solution:</u>

$\displaystyle no. \ of \ moles = \frac{9.32\times 10^{23}}{6.023 \times 10^{23}}$

no. of moles = 1.55 moles

$\rule[225]{225}{2}$

Hope this helped!

<h3>~AH1807</h3>

5 0

3 years ago

If 350.0 grams of Cr2O3 are reacted with 235.0 grams of elemental silicon, 213.2 grams of chromium metal are recovered. What is

bulgar [2K]

We calculate for the amount of chromium metal in the reactant by,
= 350 x (mass of Cr2/mass of Cr2O3)
= 350 x (104/152)
= 239.47 grams
The amount of Cr metal in the product is only 213.2 grams. Thus, the percent yield.
percent yield = (213.2 grams/239.47) x 100%
= 89%

4 0

3 years ago

Classify the following compounds as having covalent or ionic bonds.

maw [93]

Answer:

Ionic -

barium chloride , potassium iodide , aluminum sulfide , strontium iodide .

Covalent -

sulfur trioxide , phosphorus trichloride

Explanation:

Covalent bond -

Covalent bond is the bond which is formed with the sharing of the electrons between the two atoms which are taking part in the bond. It is generally formed between the atoms with similar electronegativity values.

It is the bond which is generally occurs within non metals as they share electrons to complete their octet.

The difference in the electronegativity values of the atoms involving in a covalent bond must not exceed the value of 1.7 .

Ionic bond -

It refers to the type of bond between two atoms , where the difference between the electronegativity is very high ( more than 1.7 ) .

Most of the salts are ionic in nature , and as soon as dissolved in water , dissociates into its respective ions .

Hence , from the question ,

<u>The ionic bonds are - </u>

barium chloride , potassium iodide , aluminum sulfide , strontium iodide .

<u>And the covalent bonds are - </u>

sulfur trioxide , phosphorus trichloride

6 0

4 years ago

According to the law of conversion of the number of atoms in the products of A chemical reaction must be balanced with the numbe

ASHA 777 [7]

Answer:

The number of atoms in the reactants must be equal to the number of atoms in the products.

Explanation:

Atoms cannot be destroyed in a chemical reaction.

4 0

4 years ago

Which of the following is true according to the kinetic theory of gases? A) Molecules move randomly. B) Molecules have elastic c

Gekata [30.6K]

Answer: Option (D) is the correct answer.

Explanation:

According to Kinetic theory of gases, molecules of a gas move in rapid and random motion. That is, particles are constantly in linear motion.

When these molecules colloid with each other then no energy is gained or lost by them. Also, these molecules occupy negligible amount of volume as compared to the volume of the container in which they are placed.

Moreover, as there is no energy loss taking place so, these molecules of gas undergo perfect elastic motion.

Therefore, we can conclude that all of the above given options are true according to the kinetic theory of gases.

5 0

3 years ago