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3 years ago

According to the law of conservation of matter, how must a chemical equation be written

2 answers:

8 0

I think you are suposse to use coefficients of products and reactents to balance the number of atoms of an element on both sides of a chemical equation

i hope this helps

alexira [117]3 years ago

5 0

Answer:

An equal number of atoms must be on both sides of the equation

Explanation:

The quantity of matter that exist after a chemical reaction must equal the amount that existed before it.This means that an equal number of atoms must appear on each side of the chemical equation

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Match the words to the correct descriptions.

hoa [83]

Answer:

1. Atoms, Have different properties depending on the number of protons.

2. Mixtures, The ingredients maintain their properties when they are placed together or taken apart.

3. Compounds, The atoms take on new properties when they bond together or are separated.

Explanation:

5 0

4 years ago

An isotope will lose nucleons,protons,or neutrons in order to become more

Debora [2.8K]

Many atoms if they are radioactive isotopes will loss protons and neutrons as radiation in order to gain and become more stable

hope that helps

8 0

4 years ago

Read 2 more answers

CH3CH2OH + 302 → 2002 + 3H20

Softa [21]

Answer:

Oxygen gas

Explanation:

Given expression:

CH₃CH₂OH + 3O₂ → 2CO₂ + 3H₂O

Number of moles of oxygen gas = 1 mole

Number of moles of ethanol = 1 mole

Unknown:

The limiting reactant = ?

Solution:

The limiting reactant is the reactant in short supply in a chemical reaction. To find this specie, we always us the number of moles.

From the equation of the reaction:

1 mole of ethanol would require 3 moles of oxygen gas

But we have been given just 1 mole of oxygen gas instead of 3moles.

Therefore, oxygen gas is the limiting reactant.

3 0

3 years ago

The thermite reaction reacts iron (III) oxide, Fe2O3, with aluminium powder,Al, the form aluminium oxide, Al2O3 and iron, Fe.

lara [203]

Answer:

This answer assumes that the strated "16.0g of iron" was meant to be 16.0 grams of iron(III) oxide.

Explanation:

To start, the thermite equation must be balanced.

I find:

1Fe2O3 + 2Al = 1Al2O3 + 2Fe

This tells us we need 2 moles of Al for every 1 mole of Fe2O3.

Now calculate the moles of each reactant:

Moles Fe2O3: 16.0 g/159.7 g/mole = 0.100 moles Fe2O3

Moles Al: 8.1 /26.98 g/mole = 0.300 moles Al

The balanced equation says that in order to react all of the Fe2O3 we'd need twice that amount (in moles) of the Al. (0.100 moles Fe2O3)*(2) = 0.200 moles Al.

Which of the two reactants is the limiting reagent?

We have more than enough moles of Al to react with 0.10 moles of Fe2O3. (We have 0.300 moles Al and all we need is 0.200 moles to react with the 0.10 moles of Fe2O3. Fe2O3 is the limiting reagent.

Calculate the maximum mass of iron of iron that could be formed using these quantities of reactants.

The balanced equation tells us that we will obtain 2 moles of Fe for every 1 mole of Fe2O3 consumed. Since Fe2O3 is the limiting reagent, we will assume that it completely reacts. That means 0.1 moles of Fe2O3 is reacted. Since we expect twice that many moles of Fe, we should obtain 0.200 moles of Fe. At 55.85 g/mole, we should obtain:

(0.200 moles Fe)*(55.85 g Fe/mole Fe) = 11.2 grams Fe

5 0

2 years ago

4. Write the chemical equation for the reaction that occurs when baking soda (NaHCO3) is

aev [14]

Answer: HCl+NaHCO₃=NaCl+CO₂+H₂O

Explanation:

3 0

3 years ago