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sweet-ann [11.9K]
3 years ago
13

How many moles of oxygen are necessary to completely react with propane (C3H8) to produce 16.3 mol of water according to the fol

lowing balanced chemical equation? ________________________________________________________________________ C3H8 + 5 O2 -> 3 CO2 + 4 H2O
I tried doing these they are due by 12:00 please help i have 2 more like this
Chemistry
2 answers:
Schach [20]3 years ago
8 0

Answer:

20.375 moles of oxygen are necessary to completely react with propane to produce 16.3 moles of water.

Explanation:

C_3H_8 + 5O_2\rightarrow 3 CO_2 + 4H_2O

Mole sof water formed = 16.3 moles

According to reaction , 4 moles of water are obtained from 5 moles of oxygen.

Then 16.3 moles of oxygen will be obtained from:

\frac{5}{4}\times 16.3 mol =20.375 mol of oxygen

20.375 moles of oxygen are necessary to completely react with propane.

velikii [3]3 years ago
4 0
The balanced chemical reaction is expressed as:

<span>C3H8 + 5 O2 -> 3 CO2 + 4 H2O

We are given the amount of water produced. We use this amount for the calculations. We do as follows:

16.3 mol H2O ( 1 mol C3H8 / 4 mol H2O ) = 4.075 mol C3H8 needed

Hope this answers the question. Have a nice day.</span>
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Acid rain is a dilute solution of acids that dissolve the calcium carbonate in limestone statues. Concentrated acids can dissolv
REY [17]

Answer:

See the answer below

Explanation:

A weak solution of acid would gradually dissolve the calcium carbonate in limestone statues. For example, dilute sulphuric acid formed from the dissolution of SO2 in rainwater would react with calcium carbonate according to the following equation;

    H_2SO_4(aq)+CaCO_3(s)-->CaSO_4(s)+CO_2(g)+H_2O (l)

<em>Generally, the rate of any reaction depends on a host of factors such as temperature, pressure, presence of catalysts, and surface area of reactants. The higher the surface area of reactants, the higher the rate of reaction.</em>

In this case, the rate of reaction of the dilute acid and the calcium carbonate depends on the surface area of the calcium carbonate which happens to be the only solid reactant. <u>Statues with intricate carvings seem to break down more quickly than ordinary statues because they offer more surface area for reaction to take place</u>. The intricate carvings create more surface area for reactions when compared to statues without intricate carvings.

7 0
2 years ago
Waves in the ocean are 6m apart and pass a surfer every 2 s. what is the wave speed​
Nataly_w [17]
  • Distance=6m
  • Time=2s

\\ \tt\hookrightarrow Speed=\dfrac{Distance}{Time}

\\ \tt\hookrightarrow Speed=\dfrac{6}{2}

\\ \tt\hookrightarrow Speed=3m/s

8 0
2 years ago
Read 2 more answers
Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.054 moles of sulfuric acid is mixed with water to make 667 milliliter
Nikitich [7]
As, using formula.........0.054/(.667/18)
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so the answer
4 0
3 years ago
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Nick needs 3.5 moles of sodium fluoride (NaF) for a solution he is mixing in the lab. How many grams of NaF does Nick need to me
Minchanka [31]

Answer:

147 g

Explanation:

<em>The number of moles of a substance is the ratio of the mass of the substance and the molar mass of that substance.</em> Mathematically,

  mole = mass of substance/molar mass

In this case, Nick needs 3.5 moles of NaF, the molar mass of NaF is calculated as:

  23 + 19 = 42 g/mol (Note: Na = 23, F = 19)

Hence,

mass of 3.5 mole NaF = mole x molar mass

                              = 3.5 x 42 = 147 g.

<em>Hence, Nick would need to measure out </em><em>147 g</em><em> NaF using a suitable weighing balance.</em>

5 0
3 years ago
Each isotope has a unique half-life. The half-life of an isotope is the time taken for half of the starting quantity to decay (w
Tems11 [23]

Answer:

b. 17,190

Explanation:

Using the formula for C-14 dating,

t=\dfrac{ln(\dfrac{N}{N_0})t_\frac{1}{2}  }{-0.693}

where Present Value N =1/8 of Parent Sample

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t=\dfrac{ln(\dfrac{1/8}{1})5730}{-0.693}

=17,190

Therefore the fossil is about 17190 years old.

7 0
3 years ago
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