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1 answer:

3 0

When NaCl is added to water, it dissolves into ions, Na+ and Cl-, since NaCl is a salt and a strong electrolyte. The resulting solution will have a neutral pH since NaCl is a neutral salt.
When HCl is added to water, it dissolved into ions as well, H+ and Cl-, since HCl is also a strong electrolyte. The resulting solution will have a pH of less than 7 since the H+ ions will increase the acidity of water.

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Which term refers to a universal fact sometimes based on mathematical equations?

torisob [31]

Answer:

The correct answer is a scientific law.

Explanation:

The laws of science or scientific laws refer to the statements, which predict or illustrate an array of natural processes. It is a statement based on observations or spontaneous experiments, which illustrate some characteristics of the natural world.

The term law exhibits different uses in various circumstances, that is, across all the branches of natural science. The laws are formulated through data and can be further created via mathematics, in all the conditions, they are indirectly or directly based on empirical evidence. The scientific laws recapitulate the outcomes of observations or experiments, generally within some point of application.

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3 years ago

calculate the number of moles of gas that occupy a 3.45L container at a pressure of 1.48 atm and a temperature of 45.6 Celsius

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Answer:

There are 0,2 moles of gas that ocuppy the container.

Explanation:

We apply the formula of the ideal gases, we clear n (number of moles); we use the ideal gas constant R = 0.082 l atm / K mol. Firs we convert the unit of temperature in Celsius into Kelvin:

0°C= 273 K ------> 45,6 °C= 273 + 45, 6= 318, 6 K

PV= nRT ---> n= PV/RT

n= 1,48 atm x 3,45 L /0.082 l atm / K mol x 318,6 K

n= 0,195443479 mol

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3 years ago

What are standards or attributes of a design that can be measured.

ankoles [38]

Explanation:

attribute of a person that often cannot be measured directly but can be assessed using numbers of indicators or manifest variables

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