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3 years ago

Use the data set to answer the question.

Chemistry

1 answer:

andrezito [222]3 years ago

7 0

Answer:

It is both accurate and precise.

Explanation:

Precision and accuracy are two different terms used to describe data or measurements. Accuracy refers to how close a set of measurements/experimental values is to an accepted or correct value while Precision refers to how close a series of experimental values are to one another.

In the given set of data in the question below, the Correct Value is 59.2 while the experimental values are as follows;

Trial 1: 58.7

Trial 2: 59.3

Trial 3: 60.0

Trial 4: 58.9

Trial 5: 59.2

Based on comparison, it can be observed that these experimental values are close to the correct value (59.2). Hence, they are said to be ACCURATE. Also, the experimental values are close to one another, hence, they are said to be PRECISE.

Therefore, the data set is both accurate and precise.

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A patient needs to take 875mg twice daily The pills in the bottle are each 250mg How many pills does she wants to take 875mg

Angelina_Jolie [31]

Answer:

$3.5$ pill need to taken for completing dosage of $875$ mg

Explanation:

Total dosage of medicine to be taken in a day

$= 2 * 875 \\= 1750$ mg

Total weight of one pill $= 250$ mg

Number of pills required is equal to total dosage of medicine divided by the weight of one pill.

Hence,

Number of pills

$= \frac{875}{250} \\= \frac{175}{50} \\= \frac{35}{10} \\= 3.5$

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3 years ago

Chem<br> Equations<br> Balance and Classify each of the following equations into:<br> Combination reaction, Decomposition Reacti

Arlecino [84]

Answer :

(A) The balanced chemical reaction will be:

$2KBr(aq)+Cl_2(g)\rightarrow 2KCl(aq)+Br_2(l)$

This reaction is a single replacement reaction.

(B) The balanced chemical reaction will be:

This reaction is a double displacement reaction.

(C) The balanced chemical reaction will be:

$N_2(g)+3H_2(g)\rightarrow 2NH_3(g)$

This reaction is a combination reaction.

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of an element present on reactant side must be equal to the product side.

Part (A):

The balanced chemical reaction will be:

$2KBr(aq)+Cl_2(g)\rightarrow 2KCl(aq)+Br_2(l)$

This reaction is a single replacement reaction in which the most reactive element displaces the least reactive element from its solution.

Part (B):

The balanced chemical reaction will be:

$CaBr_2(aq)
+H_2SO_4(aq)\rightarrow CaSO_4(s)+2HBr(g)$

This reaction is a double displacement reaction in which a positive cation and a negative anion of two reactants exchange their places to form two new products.

Part (C):

The balanced chemical reaction will be:

$N_2(g)+3H_2(g)\rightarrow 2NH_3(g)$

This reaction is a combination reaction in which the two atoms combine to form a larger molecule.

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3 years ago

1. What should technicians know about any

Yanka [14]

Answer:

they must know the fountion of the equipment

Explanation:

because without knowing the fountion of the equipment, you will always get a wrong or a different conclusion

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3 years ago

Which of the following is an example of chemical energy being used?

AURORKA [14]

Answer:

(A) Battery in a flashlight

Explanation:

Because the chemicals in the battery are being converted to light and heat energy from the bulb!

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3 years ago

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What do the five senses do I want a expert vefired type of Answer

iren2701 [21]

Answer:

Sense organs are the windows of knowledge because they provide information about our surroundings and help us to differentiate many things.

There are five sense organs in human beings-

1. Eyes- Sense of Vision

2. Ears- Sense of Hearing

3. Nose- Sense of Smell

4. Skin- Sense of Touch

5. Tongue- Sense of Taste

Explanation:

Sense organs are the organs through which we can see, hear, taste, touch and smell. We have five sense organs-

1. Eyes

An eye is the organ of vision. Through eyes we can see the world, differentiate our surroundings depending on its shape, size, color, length, breadth, height, distance, etc.

Because of eyes we gain knowledge about our surroundings. Eyes are important to us and we should protect our eyes.

2. Ears

An ear is the organ of hearing. We can hear different sounds and differentiate them because of our ears. We should also protect our ears from hearing loss. Ears receive sound through the pinna (outer part of ear) and direct them into ear`. The sounds pass through the inner part of the ears and reach the brain that recognizes sound.

3. Nose

Nose is the organ of smell. We can distinguish different smells because of the nose. For example- Jasmine, ginger, lemon, camphor have different smells.

4. Skin

Skin is the organ of touch. Skin covers our body. When someone touches our skin, we can feel. Skin protects our body from heat and cold.

5. Tongue

Tongue is the organ of taste. We can distinguish different foods because of our tongue. Taste buds are present in the tongue that helps to identify sweetness, bitterness, sour, etc in the food.

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3 years ago

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