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3 years ago

Clearly distinguish between science and technology

Chemistry

1 answer:

tia_tia [17]3 years ago

3 0

Answer:

The words science and technology can and often are used interchangeably. But the goal of science is the pursuit of knowledge for its own sake while the goal of technology is to create products that solve problems and improve human life. Simply put, technology is the practical application of science.

Explanation:

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Anything that takes up space and has mass is

Brilliant_brown [7]

The answer is matter. This is explained in many books and theories.

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3 years ago

Read 2 more answers

When 10.7 g of Al are reacted with 42.5 g of HCl, what volume of H2 will be produced at 47 C and 725 mmHg?

Georgia [21]

1) Write the balanced chemical equation:

2Al + 6HCl ---> 2AlCl3 + 3H2

2) Calculate the molar masses of Al and HCl and use them to convert the data to moles

Al: 27g/mol => 10.7 gAl / 27g/mol = 0.396 mol Al

HCl: 1g/mol + 35.5 g/mol = 36.5g/mol => 42.5gHCl / 36.5g/mol = 1.164 mol HCl

Theoretical ratio: 6 mol HCl / 2 mol Al = 3:1

Actual ratio: 1.164 mol HCl / 0.396 mol Al = 2.94 : 1

Then there is a little bit less HCl than the predicted by theoretical ratio, which means that this is the limitant reagent.

3) Use the amount of HCl to make the calculations of the proucts obtained.

Theoretical ratio: 3 mol H2 / 6 mol HCl = 1:3

1.164 mol HCl * 1 mol H2 / 3 mol HCl = 0.388 mol H2

4) Use the ideal gas formula to obtain the volume

pV = n RT

p = 725 mmHg * 1atm / 760mmHg = 0.954 atm
n = 0.388 mol
R = 0.082 atm*liter /K*mol
T = 47 °C + 273.15 = 320.15K

V = nRT/p = 0.388 mol * 0.082 [atm*liter/K*mol] * 320.15K / 0.954 atm = 10.7 liter

Answer: 10.7 liter

3 0

3 years ago

A rock occupies a volume of 20 cm and has a mass of 54 g find the density of this rock

bixtya [17]

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass = 54 g

volume = 20 cm³

The density is

$density = \frac{54}{20} = \frac{27}{10} \\$

We have the final answer as

Hope this helps you

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4 years ago

Fossil Fuels are an ________ resource that people are hoping to replace with ______ resources.

nata0808 [166]

Answer:

fossil fuels are an nonrenewable resource that people are hoping to replace with renewable resources

Explanation:

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3 years ago

How do u find which is physical or chemical changes

zhenek [66]

Physical change can return back to its original form while a chemical change cannot

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3 years ago

Clearly distinguish between science and technology​

Clearly distinguish between science and technology