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MakcuM [25]
3 years ago
6

Which of the following is a compound? a. air b. soda c. sterling silver d. water

Chemistry
1 answer:
alukav5142 [94]3 years ago
6 0
B soda is a compound
You might be interested in
The questions are attached​
Sladkaya [172]

Answer:

Explanation:

a) Balanced chemical equation:

C₃H₈ + 5O₂      →        3CO₂ + 4H₂O

b) Mass of oxygen gas needed = ?

Mass of propane = 25 g

Solution:

Number of moles of propane = mass/molar mass

Number of moles = 25 g/  44.1 g/mol

Number of moles = 0.57 mol

now we will compare the moles of oxygen and propane:

                            C₃H₈        :          O₂        

                                1           :            5

                             0.57        :         5/1×0.57 =  2.85 mol

Mass of oxygen:

Mass = number of moles × molar mass

Mass = 2.85 mol × 32 g/mol

Mass = 91.2 g    

c) water vapors produced = ?

Mass of propane = 25 g

Solution:

Number of moles of propane = mass/molar mass

Number of moles = 25 g/  44.1 g/mol

Number of moles = 0.57 mol

now we will compare the moles of water and propane:

                            C₃H₈        :          H₂O        

                                1           :            4

                             0.57        :         4/1×0.57 =  2.28 mol

Mass of water vapors:

Mass = moles × molar mass

Mass = 2.28 mol × 18 g/mol

Mass = 41.0 g

d)

mass of water vapors produced = 1.5 kg (1500 g)

Mass of propane reacted = ?

Solution:

Number of moles of water vapors:

Number of moles = mass/molar mass

Number of moles = 1500 g/ 18 g/mol

Number of moles = 83.33 mol

now we will compare the moles of water and propane.

         

                            H₂O          :            C₃H₈    

                               4            :              1

                             83.3         :         1/4×83.3 =  20.8 mol

Mass of propane:

Mass = number of moles ×molar mass

Mass = 20.8 mol × 44.1 g/mol

Mass = 917 g

3 0
3 years ago
You are performing a gradient elution and are instructed to begin with a low polarity solvent (petroleum ether) and continue to
Sophie [7]

Answer:

The eluting strength of a solvent is primarily related to how strongly it adsorbs onto the  adsorbent and because typical adsorbents are highly polar; thus, eluting strength increases  with solvent polarity.

Explanation:

The polarity of a solvent makes it more suitable for elution in a polar adsorbent. Hence the choice of solvents should be in order of increasing rather than decreasing polarity. polarity must increase and not decrease

3 0
3 years ago
Where is most of Earth’s fresh water found?
puteri [66]

Answer:

ice caps and glaciers

Explanation:

Over 68 percent of the fresh water on Earth is found in icecaps and glaciers, and just over 30 percent is found in ground water. Only about 0.3 percent of our fresh water is found in the surface water of lakes, rivers, and swamps.

6 0
3 years ago
Read 2 more answers
How many grams of copper (I) chloride can be produced from the reaction of 73.5 g of copper (I) oxide with hydrochloric acid acc
natulia [17]

The balanced equation for the reaction is as follows

Cu₂O + 2HCl ---> 2CuCl + H₂O

Molar ratio of Cu₂O to CuCl is 1:2

mass of Cu₂O reacted - 73.5 g

Number of moles of Cu₂O reacted - 73.5 g / 143 g/mol = 0.51 mol

According to the molar ratio,

when 1 mol of  Cu₂O reacts then 2 mol of CuCl is formed

therefore when 0.51 mol of Cu₂O reacts then - 2 x 0.51 mol of CuCl is formed

number of CuCl moles formed - 1.02 mol

mass of CuCl formed - 1.02 mol x 99 g/mol = 101 g

mass of CuCl formed is 101 g

6 0
3 years ago
Explain the difference between a physical property and chemical property. Give examples of each.
MA_775_DIABLO [31]
A physical property is what a substance is like; it's directly observable. On the other hand, a chemical property is how a substance behaves; its reactivity.

Examples of a physical property are: color, texture, boiling point, freezing point, and melting point.

Examples of a chemical property are: flammability, combustion, and formation of a precipitate.

3 0
3 years ago
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