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igomit [66]
3 years ago
9

In converting between units, it is never necessary to use more than one conversion factor. A. True B. False

Chemistry
2 answers:
lakkis [162]3 years ago
6 0
False, in converting between units, it is never necessary to use more than one conversion factor.
Radda [10]3 years ago
5 0

It is \boxed{{\text{true}}} that it is never necessary to use more than one conversion factor.

Further Explanation:

The measurements are compared with each other with the use of standards called units. These units are divided into two categories which are basic and derived units.

The units that do not require any other unit for expressing themselves and are used to define other units are known as basic units. Mass, time, length and temperature are some basic units. But some units require basic units to describe them and these are known as derived units. Density, volume, and area are some of the derived units.

Following are 7 basic quantities along with their units in the SI system:

1. Length: Meter (m)

2. Mass: Kilogram (kg)

3. Time: Second (s)

4. Thermodynamic temperature: Kelvin (K)

5. Electric current: Ampere (A)

6. Amount of substance: Mole (mol)

7. Luminous intensity: Candela (Cd)

One unit can be converted into another one with the help of a proper conversion factor. Conversion factors are the ratios that are written in the form of fractions and multiplication of which with the original unit gives the desired units.

Consider the conversion of 500 g of any substance into kg. The conversion factor for this conversion is,

 1{\text{ g}} = {10^{ - 3}}{\text{ kg}}

Therefore the desired conversion is done as follows:

\begin{aligned}{\text{Mass of object}} &= \left( {500{\text{ g}}} \right)\left( {\frac{{{{10}^{ - 3}}{\text{ kg}}}}{{1{\text{ g}}}}} \right)\\&= 0.5{\text{ kg}}\\\end{aligned}

This is a single-step conversion. So it is never necessary to use more than one conversion factor.

Learn more:

  1. What is the mass of 1 mole of viruses: brainly.com/question/8353774
  2. Determine the moles of water produced: brainly.com/question/1405182

Answer details:

Grade: Senior School

Chapter: Basic concepts of chemistry

Subject: Chemistry

Keywords: unit, basic, fundamental, mass, time, thermodynamic temperature, luminous intensity, amount of substance, electric current, conversion factor.

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The water in Glass A is cooler than the water in Glass B; therefore, the particles in Glass A move slower.

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2 years ago
Which pair of samples contains the same number of oxygen atoms in each compound?0.20 mol Ba(OH)2 and 0.20 mol H2SO40.20 mol Br2O
Whitepunk [10]

Answer:

0.20 mol Br2O and 0.20 mol HBrO have the same number of oxygen atoms

Explanation:

<em>0.20 mol Ba(OH)2 and 0.20 mol H2SO4</em>

In Ba(OH)2 there are 2 moles of O atoms in every mol of Ba(OH)2.

Number of O atoms in 0.20 moles Ba(OH)2 = 2*0.20 = 0.40 moles O atom

In H2SO4 there are 4 moles of O atoms for every mol of H2SO4.

Number of O atoms in 0.20 moles H2SO4 = 4*0.20 = 0.80 moles O atom

⇒ 0.20 mol Ba(OH)2 and 0.20 mol H2SO4 do <u>not</u> have the same number of oxygen atoms.

<em>0.20 mol Br2O and 0.20 mol HBrO</em>

In Br2O there is 1 mol of O atoms in every mol Br2O

Number of O atoms in 0.20 moles Br2O = 0.20*1 = 0.20 moles O atom

In HBrO there is 1 mol of O atom in every mol HBrO

Number of O atoms in 0.20 moles HBrO = 0.20 *1 = 0.20 moles O atom

⇒ in 0.20 moles Br2O and 0.20 moles HBrO we <u>have the same</u> number of oxygen atoms

0.20 moles of Oygen contains: = 0.20 * 6.022*10^23 = 1.2 *10^23 O atoms

<em>0.10 mol Fe2O3 and 0.50 mol BaO</em>

In Fe2O3 there are 3 moles of O atoms in every mol of Fe2O3

Number of O atoms in 0.10 moles Fe2O3 = 0.10 * 3 = 0.30 moles O atom

In BaO there is 1 mol of O atoms in every mol BaO

Number of O atoms in 0.50 mol BaO = 1*0.50 = 0.50 moles O atom

⇒ 0.10 mol Fe2O3 and 0.50 mol BaO do <u>not</u> have the same number of oxygen atoms.

<em>0.10 mol Na2O and 0.10 mol Na2SO4</em>

In Na2O there is 1 mol of O atoms in every mol of Na2O

Number of O atoms in 0.10 mol Na2O = 1*0.10 = 0.10 moles O atom

In Na2sO4 there are 4 moles of O atoms in every mol of Na2SO4

Number of O atoms in 0.10 mol Na2SO4 = 4*0.10 = 0.40 moles O atom

⇒ 0.10 mol Na2O and 0.10 mol Na2SO4 do <u>not</u> have the same number of oxygen atoms.

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