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2 years ago

How do laboratory tools improve the observations made by a scientist?

Chemistry

2 answers:

vodomira [7]2 years ago

4 0

Answer:

Explanation:

Tools, instruments, apparatus are very key to research works carried out in the laboratory. The more sophisticated they become, the more efficiency they provide in making ground breaking researches.

Over the years, technological advancement has afforded scientists with new way of achieving precision and accuracy in their procedures by developing cutting edge facitlities. These equipment can help carry out better experiment and make observations simple and easy to do.

prohojiy [21]2 years ago

4 0

Explanation:

laboratory tools improve the observations made by a scientist in the following ways:

Primarily by improving the accuracy and precision.

laboratory tools improve the efficiency of the experiment or observation made by a scientist.

laboratory tools help by decreasing time and giving more prominent reproducibility of outcomes.
Laboratory tools enhance the research and it makes the things easier to distinguish.
laboratory tools has make more accessible the work of scientist on their research.
laboratory tools help the scientist to examine their experiments for example when they want to analyze specimen, they use microscope.

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Aleks [24]

Answer:CALINE4 Model and Geographical Information System were used for

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Explanation:

4 0

2 years ago

A scientist measures the mass of two liquids before and after combining them. The mass after combining the liquids is less then

Lelu [443]

Answer:

A chemical change occurred and a gas was produced.

Step-by-step explanation:

If there is no chemical reaction, the Law of Conservation of Mass says that

Total mass = Mass 1 + Mass 2

However, if the two liquids react and give off a gas, then

Total mass = Mass 1 + Mass 2 + Mass of gas

You are not measuring the mass of the gas, so the mass of the liquids after mixing is less than it was before mixing.

For example, if Liquid 1 was a solution of HCl and Liquid 2 was a solution of Na₂CO₃, they would give off CO₂ on mixing. but you would not be measuring the mass of the CO₂.

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2 years ago

The ideal gas law tends to become inaccurate when Group of answer choices the pressure is raised and the temperature is lowered.

const2013 [10]

Answer: Option (a) is the correct answer.

Explanation:

At low pressure and high temperature there exists no force of attraction or repulsion between the molecules of a gas. Hence, gases behave ideally at these conditions.

Whereas at low temperature there occurs a decrease in kinetic energy of gas molecules and high pressure causes the molecules to come closer to each other.

As a result, there exists force of attraction between the molecules at low temperature and high pressure and under these conditions gases are known as real gases.

Thus, we can conclude that the ideal gas law tends to become inaccurate when the pressure is raised and the temperature is lowered.

5 0

2 years ago

Identify the Lewis acids and Lewis bases in the following reactions:

postnew [5]

Answer: 1. $H^++OH^-\rightarrow H_2O$ Lewis acid : $H^+$ , Lewis base : $OH^-$

2. $Cl^-+BCl_3\rightarrow BCl_4^-$ Lewis acid : $BCl_3$ , Lewis base : $Cl^-$

3. $K^++6H_2O\rightarrow K(H_2O)_6$ Lewis acid : $K^+$ , Lewis base : $H_2O$

Explanation:

According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.

1. $H^++OH^-\rightarrow H_2O$

As $H^+$ gained electrons to complete its octet. Thus it acts as lewis acid. $OH^-$ acts as lewis base as it donates lone pair of electrons to electron deficient specie $H^+$ .

2. $Cl^-+BCl_3\rightarrow BCl_4^-$

As $BCl_3$ is short of two electrons to complete its octet. Thus it acts as lewis acid. $Cl^-$ acts as lewis base as it donates lone pair of electrons to electron deficient specie $BCl_3$ .

3. $K^++6H_2O\rightarrow K(H_2O)_6$

As $K^+$ is short of electrons to complete its octet. Thus it acts as lewis acid. $H_2O$ acts as lewis base as it donates lone pair of electrons to electron deficient specie $K^+$ .

8 0

2 years ago

A balloon inflated with three breaths of air has a volume of 1.7 L. At the same temperature and pressure, what is the volume of

Karolina [17]

Ans: The final volume of the balloon is 4.5 L

Given:

Volume of balloon inflated with 3 breaths = 1.7 L

To determine:

Volume of balloon after a total of 3+5 = 8 breaths

Explanation:

Volume of the balloon per breath = 1.7 L * 1 breath/3 breaths = 0.567 L

Final volume of balloon after 8 breaths = 0.567 L * 8 breath/1 breath

= 4.536 L

7 0

2 years ago