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2 years ago

Convert the following descriptions into balanced equations:

1 answer:

3 0

Balanced equation for hydrogen gas is passed over powdered iron(III) oxide, iron metal and water vapor form.

$3H_{2(g)}+ Fe_2O_{3(s)}$ → $3H_2O_{(g)}+2Fe_{(s)}$

<h3>What is a balanced equation?</h3>

A balanced chemical equation is a chemist's shortcut for representing the molecules and atoms involved in a chemical process using chemical symbols. On the left side of the equation are the reactants, and on the right are the products. The number of molecules involved is indicated by the coefficients, and the number of atoms in each molecule is indicated by the subscripts.

Based on the interactions of the constituent chemicals, knowledge of the law of conservation of mass, and practise with a few example equations, chemical equations can be "balanced," much like algebraic equations.

Learn more about Balanced equation

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3. What is the mass of an object with a volume of 4 L and a density of 1.25 g/mL?

ch4aika [34]

Answer:

5000g

Explanation:

mass= density × volume

Since the unit of density here is g/mL, we need to convert the volume to mL.

1L= 1000mL

4L= 4 ×1000 = 4000 mL

Mass of object

= 1.25 ×4000

= 5000g

3 0

3 years ago

Read 2 more answers

What are the examples of physical chemistry?

OverLord2011 [107]

ANSWER:

Physical chemistry is the branch of chemistry that deals with the physical structure of chemical compounds, the way they react with other matter and the bonds that hold their atoms together. An example of physical chemistry is nitric acid eating through wood.

3 0

1 year ago

(h) The student made observations related to the contents of the Erlenmeyer flask during the titration. Identify an observation

katen-ka-za [31]

Answer:

Explanation:

During titration indicators are often used to identify chemical changes between reacting species.

For colorless solutions in which no noticeable changes can easily be seen, indicators are the best bet. Most titration processes involves a combination of acids and bases to an end point.

Indicators are substances whose color changes to signal the end of an acid-base reaction. Examples are methyl orange, methyl red, phenolphthalein, litmus, cresol red, cresol green, alizarin R3, bromothymol blue and congo red.

Most of these indicators have various colors when chemical changes occur.

Also, there are heat changes that accompanies most of these reactions. These are also indicators of chemical changes.

5 0

3 years ago

I hate chemistry sm pls help

Liono4ka [1.6K]

Answer:
c
O2: 7 mol
CO2: 4 mil

5 0

2 years ago

At a certain temperature, the solubility of strontium arsenate, sr3(aso4)2, is 0.0560 g/l. what is the ksp of this salt at this

REY [17]

The solution for this problem is:
Get into moles first. .0560 grams over 540.8 grams per mole = 1.04 x l0^-4 moles
Sr3(As04)2 = 3 Sr++(aq) plus 2 As04^-3(aq)
Ksp = (Sr++)^3(As04^-3)^2
(Sr++) = 3 X 1.04 x l0^-4= 3.11 x l0^-4
(As04^-3) = 2 x 1.04 x l0^-4= 2.07 x l0^-4
Ksp = (1.04 x l0^-4)^3 (2.07 x l0^-4)^2 which equals 4.82 x 10^-20

5 0

3 years ago