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Vsevolod [243]
3 years ago
11

Calculate the number of moles found in 88.02g of CO2

Chemistry
1 answer:
bija089 [108]3 years ago
6 0

Answer:

2.00moles

Explanation:

mol=mass/mr

88.02/ [12+2(16)] = 2.00

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identify each material as a compound or a mixture. Caffeine contains hydrogen, carbon, nitrogen, and oxygen atoms in a fixed rat
vitfil [10]
Answer: caffeine is a compound.

Explanation:

1) As stated c<span>affeine contains hydrogen, carbon, nitrogen, and oxygen atoms in a fixed ratio.

2) The definition of compound is a pure substance formed by chemical bonding of two or more fifferent elements. That means a defined ratio of the elements in the compound, which conferes uniform and equal properties to every part of the compound.

Some examples of compounds are salt (NaCl), water (H2O), vinegard (CH3 COOH).

A mixture combines several elements or compounds, not bonded by chemical bonds but mixed in ratios which may vary.
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7 0
3 years ago
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A mixture of Ar, He, and O2 has a total pressure of 1,015 kPa. Argon exerts a partial pressure of 152 kPa and Helium exerts a pa
arsen [322]
This one is easy. It's just addition and subtraction. Add the partial pressure of Argon and the partial pressure of Helium:
   152 kPa
<u>+305 kPa</u><u>
</u>  457 kPa

Next, subtract the result from the total pressure:

  1015 kPa
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8 0
3 years ago
What is the ph of a 0.014 M HCL solution?
Allushta [10]

Answer:

pH = 1.853

Explanation:

For every mole of hydrochloric acid, one mole of hydronium ion is required. Thus, in order to neutralize 0.014 moles of HCL, 0.014 moles of hydronium is required.

[H_3O^+] = [HCl] = 0.014

pH  = -log [H^+] = -log [H_3O^+]

Substituting the available values in above equation, we can say that   the pH of the solution is equal to

- log (0.014)

pH = 1.853

pH of a 0.014 M HCL solution = 1.853

8 0
3 years ago
1 point
Rina8888 [55]

Answer:

19.39mph

Explanation:

To calculate speed, the formula; distance (d)/time(t) is used.

In this question, a distance of 40yards and a time of 4.22seconds is given. We need to convert the distance to miles and time to hours.

If 3600s = 1 hr

Then 4.22s will be 4.22/3600 hours

= 0.001172hours.

If 1760 yd = 1 mile

Then 40 yd will be 40/1760 miles

= 0.02272miles

Hence, the speed in miles per hour (mph) = 0.02272miles ÷ 0.001172hours

= 0.02272 ÷ 0.001172

= 19.38566

= 19.39

Therefore, the speed of the player is 19.39 miles per hour (mph).

4 0
3 years ago
Plz help I’ll give brainliest!!!
Ilia_Sergeevich [38]
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