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4 years ago

What is not represented by a balanced chemical equation?

Chemistry

1 answer:

astraxan [27]4 years ago

5 0

Answer is: 4) The same subscripts are on each side of the equation.

For example, balanced chemical reaction:

2Mg + O₂ → 2MgO.

1) The same number of atoms is on each side of the equation: two magnesium atoms and two oxgen atoms.

2) The formulas for all substances are correct: in magnesium oxide (MgO), magnesium has oxidation number +2 and oxygen -2, so formula is good, because compound must be neutral.

3) The same mass is represented on each side of the equation: because there is same number of atoms, the mass is the same.

4) The same subscripts are on each side of the equation: oxygen does not have same subscripts.

You might be interested in

For the reaction C6H6 + ? O2 → ? CO2+? H2O , what is the maximum amount of CO2 which could be formed from 6.59 g of C6H6 and 6.6

Likurg_2 [28]

Answer: 3.52 grams

Explanation:

$2C_6H_6+15O_2\rightarrow 12CO_2+6H_2O$

Given moles:

moles of oxygen = 6.62

moles of $C_6H_6=\frac{\text {given mass}}{\text {molar mas}}=\frac{6.59g}{78g/mol}=0.08moles$

According to stoichiometry:

2 moles of benzene reacts with = 15 moles of oxygen

Thus 0.08 moles of benzene will react with = $\frac{15}{2}\times 0.08=0.6$ moles of oxygen

Thus benzene is the limiting reagent as it limits the formation of products and oxygen is the excess reagent.

As 2 moles of benzene produce = 12 moles of carbon dioxide

0.08 mole of benzene will produce = $\frac{12}{2}\times 0.08=0.48moles$ of carbon dioxide

Mass of carbon dioxide= $moles\times {\text {Molar mass}}=0.48\times 44=3.52g$

Thus 3.52 g of carbon dioxide are produced.

4 0

4 years ago

Which will get spoiled faster: plum in water or plum in the open?

lara31 [8.8K]

Answer:

It depends

(plum will spoil more quickly at warm temperatures)

Explanation:

3 0

2 years ago

Match the element with number of valence electrons

Alla [95]

Answer:

Oxygen-O = 6

Carbon C = 4

Gallium G = 3

Astatine A = 7

Arsenic As = 5

Potassium K = 1

Hydrogen H = 1

Helium H = 2

Explanation:

6 0

2 years ago

you have a lead ball with a mass of 420 g. the density of lead is 10.5 g/cm³. what is the volume of the ball

IrinaK [193]

Answer:

The answer is

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

$volume = \frac{mass}{density}$

From the question

mass = 420 g

density = 10.5 g/cm³

The volume is

$volume = \frac{420}{10.5} \\$

We have the final answer as

Hope this helps you

7 0

3 years ago

4AI+30 2 > 2AI2O3 What id the chemical reaction?

vesna_86 [32]

This is a combination reaction. Look at the 2 elements on left and a compound on the right.

7 0

3 years ago