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3 years ago

What is an independent variable

Chemistry

1 answer:

frez [133]3 years ago

4 0

Answer:

a variable (often denoted by x ) whose variation does not depend on that of another.

Explanation:

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Vhich of the following equations is correctly balanced?

Eva8 [605]

Answer:

option 3.

2Cr(NO₃)₃ + 3 FeSO₄ → 3 Fe(NO₃)₂ + Cr₂(SO₄)₃

Explanation:

Balance Chemical Equation:

A balanced chemical equation is that in which the number of the reactant atoms equal to the number of the product atom.

For example if the oxygen at the reactant side is 4, the number of oxygen must be 4 on the product side.

Solution

Check each equation one by one

1. Cr(NO₃)₃ + 2 FeSO₄ → 2 Fe(NO₃)₂ + Cr₂(SO₄)₃

Number of atoms of Reactant:

Cr = 1

N = 3

O = 17

Fe = 2

S = 2

Number of atoms of Reactant:

Cr = 2

N = 4

O = 24

Fe = 2

S = 3

So this is not a balance equation as the atoms of the reactant atom not equal to the product atoms.

___________________________________

2. 2Cr(NO₃)₃ + 2 FeSO₄ → 2 Fe(NO₃)₂ + Cr₂(SO₄)₃

Number of atoms of Reactant:

Cr = 2

N = 6

O = 26

Fe = 2

S = 2

Number of atoms of Reactant:

Cr = 2

N = 4

O = 24

Fe = 2

S = 3

So this is not a balance equation as the atoms of the reactant atom not equal to the product atoms.

___________________________________

2Cr(NO₃)₃ + 3 FeSO₄ → 3 Fe(NO₃)₂ + Cr₂(SO₄)₃

Number of atoms of Reactant:

Cr = 2

N = 6

O = 30

Fe = 3

S = 3

Number of atoms of Reactant:

Cr = 2

N = 6

O = 30

Fe = 3

S = 3

So this is a balance equation as the atoms of the reactant atom are equal to the product atoms.

Note** you write Cu and Cl instead of Cr, So that was also corrected.

5 0

4 years ago

Consider the partial equation. Br2 + NaF --> Which best completes the chemical equation?

balandron [24]

Answer is (1) - no reaction.

Explanation; 

Some of you may think this reaction as a single replacement reaction which gives NaBr + F₂ as products.

But, according to the reactivity of the halogens, reactivity decreases from up to bottom of the group. F is placed above Br. Hence, F is more reactive than Br. Hence, Br can't replace F.

5 0

3 years ago

Read 2 more answers

A sound wave has a wavelength of 0.450

Karolina [17]

Answer:

The wave's frequency is 733 hertz.

Explanation:

The wavelength (λ) is the minimum distance between two points of the wave that are in the same state of vibration.

Frequency (f) is the number of vibrations that occur in a unit of time.

The speed of propagation (v) is the speed with which the wave propagates in the middle. Relate wavelength (λ) and frequency (f) inversely proportionally using the following equation: v = f * λ.

In this case you know that: