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1 year ago

Question 1: Express the following out of scientific

Chemistry

1 answer:

sasho [114]1 year ago

8 0

Expanding the following out of scientific notation gives:

1. 1.5× $10^{5}$ cm= 15000cm

2. 2.7× $10^{-3}$ cm= 0.0027cm

Numbers that are either too large or too little to be conveniently stated in decimal form can be expressed using scientific notation. It is also known as standard form in the UK and scientific form, standard index form, and standard form.

Using scientific notation, one can express extremely big or extremely small values. When a number between 1 and 10 is multiplied by a power of 10, the result is represented in scientific notation.

So, the expanded forms are;

1. 1.5× $10^{5}$ cm= 15000cm

2. 2.7× $10^{-3}$ cm= 0.0027cm

Learn more about scientific notation here;

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Answer:

For a: The volume of the box is 217.5 mL

For b: The volume of the box is 0.2175 L

Explanation:

The box is a type of cuboid.

To calculate the volume of cuboid, we use the equation:

$V=lbh$

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b = breadth of cuboid = 7.25 cm

h = height of cuboid = 3.00 cm

Putting values in above equation, we get:

$V=10.00\times 7.25\times 3.00=217.5cm^3$

For a:

To convert the volume of cuboid into milliliters, we use the conversion factor:

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$\Rightarrow 217.5cm^3\times (\frac{1mL}{1cm^3})\\\\\Rightarrow 217.5mL$

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For b:

To convert the volume of cuboid into liters, we use the conversion factor:

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$\Rightarrow 217.5cm^3\times (\frac{1L}{1000cm^3})\\\\\Rightarrow 0.2175L$

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3 years ago

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2 years ago

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Explanation:

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the weak acid is dissociated into H⁺ and A⁻ ions in the solution.

now the conjugate base of the weak acid HA is

HA(aq) {weak acid} H⁺(aq) + A⁻(aq) {conjugate base}

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pH = pKₐ + log( [A⁻] / [HA])

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