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Tju [1.3M]
3 years ago
11

Billy beaker traveled 115 kilometers in one morning: how far is this in feet

Chemistry
2 answers:
Pachacha [2.7K]3 years ago
8 0
Is the answer youre looking for 377297 feet
kotykmax [81]3 years ago
6 0
1 kilometer = 3280.84 feet.

So 115 kilometers = 3280.84 * 115 = 377296.6 feet

So Billy beaker traveled 377296.6 feet. If you wanted to round the answer, he traveled 377297 feet.

Hope this helps! :)
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Convert 25 degrees Celsius to Farenheit.
Sindrei [870]

Answer:

(25°C × 9/5) + 32 = 77°F

Explanation:

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6 0
2 years ago
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A 6.00 L vessel contains 20.0 g of PCl3 and 3.15 g of O2 at 15.0 ∘C. The vessel is heated to 210 ∘C, and the contents react to g
dusya [7]

<u>Answer:</u> The final pressure in the vessel will be 0.965 atm

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}      .....(1)

  • <u>For phosphorus trichloride:</u>

Given mass of phosphorus trichloride = 20.0 g

Molar mass of phosphorus trichloride = 137.3 g/mol

Putting values in equation 1, we get:

\text{Moles of phosphorus trichloride}=\frac{20.0g}{137.3g/mol}=0.146mol

  • <u>For oxygen gas:</u>

Given mass of oxygen gas = 3.15 g

Molar mass of oxygen gas = 32 g/mol

Putting values in equation 1, we get:

\text{Moles of oxygen gas}=\frac{3.15g}{32g/mol}=0.098mol

The chemical equation for the reaction of phosphorus trichloride and oxygen gas follows:

2PCl_3+O_2\rightarrow 2POCl_3

By Stoichiometry of the reaction:

2 moles of phosphorus trichloride reacts with 1 mole of oxygen gas

So, 0.146 moles of phosphorus trichloride will react with = \frac{1}{2}\times 0.146=0.073mol of oxygen gas

As, given amount of oxygen gas is more than the required amount. So, it is considered as an excess reagent.

Thus, phosphorus trichloride is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

2 moles of phosphorus trichloride produces 2 moles of POCl_3

So, 0.146 moles of phosphorus trichloride will produce = \frac{2}{2}\times 0.146=0.146mol of POCl_3

To calculate the pressure of the vessel, we use the equation given by ideal gas follows:

PV=nRT

where,

P = pressure of the vessel = ?

V = Volume of the vessel = 6.00 L

T = Temperature of the vessel = 210^oC=[210+273]K=483K

R = Gas constant = 0.0821\text{ L. atm }mol^{-1}K^{-1}

n = number of moles = 0.146 moles

Putting values in above equation, we get:

P\times 6.00L=0.146mol\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 483K\\\\P=\frac{0.146\times 0.0821\times 483}{6.00}=0.965atm

Hence, the final pressure in the vessel will be 0.965 atm

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3 years ago
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Kelly is giving her friend directions to a nearby park. Which model would be most appropriate for her to use?
topjm [15]

both of u r wrong its a

6 0
3 years ago
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Use this equqation for the problem:4Al+3O2 --&gt; 2Al2O3 How many moles of oxygen are needed to completely react with 14.8 mol o
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Each mole of butane needs 6.5 moles of oxygen, so 13 moles of oxygen is required for 2 moles of butane in a complete combustion

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Which of these solutions has the highest freezing point?
ANEK [815]

Answer: 1.0 M molecular sucrose (C₁₂H₂₂O₁₁).


Explanation:


1) The depression of the freezing point of a solvent when you add a solute is a colligative property.


2) Colligative properties are those physical properties of solutions that depends on the number of solute particles dissolved into the solution.


3) The relation between the number of solute particles and the depresson of the freezing point is proportional: the greater the number of solute particles the greater the freezing point depression.


4) You need to find the solution with the highest freezing point, this is the solution in which the freezing point decreased the least.


5) Then, that is the solution with least number of solute particles.


6) Since all the given solutions have the same molarity (1.0 M), you only have to deal with the possible ionization of the different solutes.


7) NaCl, CaBr₂, AlBr₃, and KCl are ionic compounds, so each unit of them will ionize into two, three, four, and two ions, respectively, while sucrose, being a covalent compound does not dissociate.


Then, 1.0 M solution of sucrose will have less solute particles than the others, and will exhitibit the lowest freezing point depression, meaning that it will have the highest freezing point of the given solutions.



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