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3 years ago

CH4 + 2O2 --> CO2 + 2H2O

Chemistry

1 answer:

Tomtit [17]3 years ago

3 0

Answer:

1 mole of CO2 and 2 mole H2O will be produced in the reaction.

Explanation:

N:B: I guess it will be 6 moles of O2 not CO2.

Balanced Equation: CH4 + 2O2 --> CO2 + 2H2O

Given,

1 mole CH4

6 moles of O2

According to Stoichiometry,

In the reaction,

2 mole O2 reacts with 1 mole CH4

1 mole O2 reacts with 1/2 mole CH4

∴6 mole O2 reacts with (1/2)*6 mole CH4

= 3 moles of CH4

But, there is only 1 mole CH4 provided. So CH4 is the limiting reagent.

Now,

According to Stoichiometry,

In the reaction,

1 mole CH4 produces 2 moles of H2O

Again,

According to Stoichiometry,

In the reaction,

1 mole CH4 produces 1 mole CO2

So, 1 mole of CO2 and 2 mole H2O will be produced in the reaction.

N:B:[Doing calculation with limiting reagent in problems like these gives you the most accurate answer].

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Examine the three isotopes of potassium (K) below.

liubo4ka [24]

Answer: The correct answer is Potassium-39, Potassium-40, Potassium-41

Explanation:

Atomic number is defined as the number of protons present in an atom.

Mass number is defined as the sum of number of protons and number of neutrons present in an atom. It is represented as A.

A = Mass number = Number of neutrons + Number of protons.

For the given isotopes of potassium:

Atomic number of potassium is 19.

For potassium-41 isotope:

Mass number = 41

Number of neutrons = 41 - 19 = 22

For potassium-39 isotope:

Mass number = 39

Number of neutrons = 39 - 19 = 20

For potassium-40 isotope:

Mass number = 40

Number of neutrons = 40 - 19 = 21

The most number of neutrons are in potassium-41 isotope and the least number of neutrons are in potassium-39

Hence, the correct answer is Potassium-39, Potassium-40, Potassium-41

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4 years ago

HNO3 is an arrehenius acid or base

madam [21]

HBr, HI, HCL, HNO3, H2SO4, HCLO4 are all acid based.

5 0

4 years ago

When an ionic compound dissolves in water:_________.

Katarina [22]

Answer:

a. the negative ends of water molecules surround the positive ions.

Explanation:

Ionization reaction is defined as the reaction in which an ionic compound dissociates into its ions when dissolved in aqueous solution.

Thus,

$NaCl_{(s)}\rightarrow Na^+_{(aq)}+Cl^-_{(aq)}$

When the ionic compound dissociates, the cation which is positively charged gets attracted to the oxygen (Negative ends) which is present in the water. The anion which is negatively charged gets attracted to the hydrogen (Positive ends) of the water.

Hence, the correct option is:- a. the negative ends of water molecules surround the positive ions.

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4 years ago

Which of the following characteristics is not a property of a base?

zysi [14]

Ammonia ionizes as hydroxyl ions and Ammonium ions. That's why it's a base. I do not remember which definition this fit.

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3 years ago

__Na3PO4 + __Sr(NO3)2 --> ___Sr3(PO4)2 + __NaNO3

lisov135 [29]

Answer:

0.0526mol

Explanation:

The chemical equation given in this equation is as follows:

Na3PO4 + Sr(NO3)2 → Sr3(PO4)2 + NaNO3

However, this equation is unbalanced as the number of atoms of each element on each side does not correlate. The balanced equation is as follows:

2Na3PO4 + 3Sr(NO3)2 → Sr3(PO4)2 + 6NaNO3

This balanced equation means that:

2 moles of Sodium Phosphate (Na3PO4) is required to react with 3 moles of Strontium Nitrate (Sr(NO3)2)

Hence, if 0.0789 moles of Strontium Nitrate are reacted, then 0.0789 × 2/3

moles of sodium phosphate will also react.

= 0.0789 × 2/3

= 0.1578/3

= 0.0526mol

5 0

3 years ago