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stiks02 [169]
3 years ago
5

Please help!!

Chemistry
2 answers:
Phantasy [73]3 years ago
7 0
1.
cost in cents

cost = 5m



2.
miles = c + 2
Nesterboy [21]3 years ago
6 0

Answer:

1) c = 5cents/min × m

2) x = (2+c) miles

Explanation:

1) Cost paid per minute = 5 cents

Or we can also write it as cost per minute = 5 cents/min

Suppose Tom uses phone for m minutes, then cost (c)will be given an expression :

c = 5cents/min × m

2) Distance covered by Clint in a week = c  miles

Distance covered by Brenda =  x

Brenda runs 2 miles more each week than Clint.

x = (2+c) miles

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What is the empirical formula of a compound composed of 3.25% hydrogen ( H ), 19.36% carbon ( C ), and 77.39% oxygen ( O ) by ma
Montano1993 [528]

Answer:

The answer to your question is C₂HO₃

Explanation:

Data

Hydrogen = 3.25%

Carbon = 19.36%

Oxygen = 77.39%

Process

1.- Write the percent as grams

Hydrogen = 3.25 g

Carbon = 19.36 g

Oxygen = 77.39 g

2.- Convert the grams to moles

                     1 g of H ----------------- 1 mol

                   3,25 g of H -------------  x

                     x = (3.25 x 1) / 1

                     x = 3.25 moles

                    12 g of C ---------------- 1 mol

                     19.36 g of C ----------  x

                     x = (19.36 x 1) / 12

                     x = 1.61 moles

                     16g of O --------------- 1 mol

                     77.39 g of O ---------  x

                      x = (77.39 x 1)/16

                      x = 4.83

3.- Divide by the lowest number of moles

Carbon = 3.25/1.61 = 2

Hydrogen = 1.61/1.61 = 1

Oxygen = 4.83/1.61 = 3

4.- Write the empirical formula

                        C₂HO₃

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3 years ago
Write an 250 words about Water Purification and Filtration
kotykmax [81]

Answer:

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Extreme lack or loss of water may lead to dehydration of the body and other health complications. For this reason, governments ensure that citizens have access to clean and safe water for domestic use. Clean water is essential in ensuring that no pathogens or impurities are ingested by people, either through direct drinking or through food.

To attain these standards of water, purification is important. Water purification involves physical and chemical processes, which are carried out stepwise to ensure the water is safe and free from any harm. This directional process essay synthesizes the steps, which have to be followed to achieve this task.

In essence, water purification denotes the process used to free water from impurities like bacteria and contaminants. Since the process is aimed at eliminating all the impurities present in the water, it is necessary to apply chemical and physical methods of separation in an orderly manner.

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anastassius [24]
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bagirrra123 [75]
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