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enot [183]
3 years ago
12

What is the difference between inferring and predicting

Chemistry
1 answer:
attashe74 [19]3 years ago
3 0

‘Inference’ is a noun and its meaning is the act or process of reaching a conclusion about something from known facts or evidence. An ‘inference’ can be a verbal statement, but more commonly it refers to a thought process. For example: It seems like a reasonable inference that it is cold outside, because everyone I see is wearing a coat. An inference is usually made about something with a degree of certainty, based on facts like statistics, calculations, observations or generalizations. ‘Infer’ is the verb form of ‘inference’, having the same meaning, to form an opinion or reach a conclusion based on known facts. For example: We can infer that it is cold outside based on what we see people wearing. Synonyms include words like ‘surmise’, ‘deduce’, ‘reason’ and ‘conclude’.

‘Prediction’ is also a noun. It means a statement about what will or might happen in the future. A ‘prediction’ generally is a verbal statement, but it can mean just a mental thought. For example: I made a prediction that it will snow tomorrow. There is also a commonly used verb form of ‘prediction’, ‘predict’. ‘To predict’ means to say that something might or definitely will happen in the future. For example: I predict it will snow tomorrow. While ‘prediction’ and ‘predict’ are usually based on some sort of fact, observation, experience or scientific reason, these meaning behind these words does not have definite certainty of occurring. Something that someone predicts may or may not actually happen. A good example of an everyday prediction is the weather forecast. What is forecasted, or predicted, is based on scientific evidence, but it is not a known certainty, just a <span>probability.</span> 

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(iii) Give two reasons why the electrolyte contains cryolite​
V125BC [204]

Answer:

The mixture of cryolite and aluminum oxide has a lower melting point than pure aluminum oxide. This means a lower amount of energy is required to establish effective conditions for electrolysis and thus makes it more cost effective.

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3 0
3 years ago
Compound A is an organic compound which contains Carbon, Hydrogen and Oxygen. When 0.240g of the vapour of A is slowly passed ov
vesna_86 [32]

(a)   In this section, give your answers to three decimal places.

(i)

Calculate the mass of carbon present in 0.352 g of CO

2

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Use this value to calculate the amount, in moles, of carbon atoms present in 0.240 g

of

A

.

(ii)

Calculate the mass of hydrogen present in 0.144 g of H

2

O.

Use this value to calculate the amount, in moles, of hydrogen atoms present in 0.240 g

of

A

.

(iii)

Use your answers to calculate the mass of oxygen present in 0.240 g of

A

Use this value to calculate the amount, in moles, of oxygen atoms present in 0.240 g

of

A


(b)

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(a)

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4 0
4 years ago
What is the empirical formula for a compound that contains 10.89% magnesium 31.77% chloride and 57.34% oxygen
Blizzard [7]

Answer: Mg_{1}Cl_{2}O_{8}

Explanation:

If percentage are given then we are taking total mass is 100 grams.So, the mass of each element is equal to the percentage given.

Mass of Mg = 10.89 g

Mass of Cl = 31.77 g

Mass of O = 57.34 g

Step 1 : convert given masses into moles.

Moles of Mg=\frac {\text{ given mass of Mg}}{\text{ molar mass of Mg}}= \frac {10.89g}{24g/mole}=0.45moles

Moles of Cl = \frac {\text{ given mass of Cl}}{\text{ molar mass of Cl}}= \frac {31.77g}{35.5g/mole}=0.89moles

Moles of O =\frac {\text{ given mass of O}}{\text{ molar mass of O}}=\frac {57.34g}{16g/mole}=3.58moles

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For Mg = \frac {0.45}{0.45}=1

For Cl = \frac {0.89}{0.45}=2

For O= \frac {3.58}{0.45}=8

The ratio of Mg :Cl : O= 1 : 2 : 8

Hence the empirical formula is Mg_{1}Cl_{2}O_{8}

4 0
3 years ago
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