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defon
3 years ago
5

Describe the steps you would use to solve this problem. In a scale drawing of a dining room floor plan, 10mm equals 2 meters. If

the homeowners wanted to purchase flooring that costs $10.89 per square yard, how much would they spend on flooring for the dinning room? The demensions of the dining room on the floor plan are 40 mm x 32 mm.
Chemistry
1 answer:
horrorfan [7]3 years ago
4 0

Answer:

666.95 $

Explanation:

If In a scale drawing of a dining room floor plan 10 mm = 2 meters

then 40 mm = (40 × 2) / 10 = 8 meters

and 32 mm = (32 × 2) / 10 = 6.4 meters

area of the dining room = 8 × 6.4 = 51.2 m²

1 square yard = 0.836 squared meters (m²) and it costs 10.89 $

Now we devise the following reasoning:

if        0.836 m² of flooring costs 10.89 $

then       51.2 m² of flooring costs X $

X = (51.2 × 10.89) / 0.836 = 666.95 $

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gold

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3 years ago
c3H8 + 5O2 = 3CO2 + 4H2O When 44.0 grams of propane (C3H8) under goes complete combustion, how many grams of water will be produ
Umnica [9.8K]

<u>Answer:</u> 72 grams of water will be produced.

<u>Explanation:</u>

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

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

Mass of propane = 44 grams

Molar mass of propane = 44 grams

Putting values in above equation, we get:

\text{moles of propane}=\frac{44g}{44g/mol}=1mole

For the reaction of combustion reaction of propane, the equation follows:

C_3H_8+5O_2\rightarrow 3CO_2+4H_2O

By Stoichiometry of the reaction,

1 mole of propane produces 4 moles of water.

So, 1 mole of propane will produce = \frac{1}{1}\times 4=4moles of water.

Now, to calculate the amount of water, we use equation 1, we get:

Molar mass of water = 18 g/mol

4mol=\frac{\text{Mass of water}}{18g/mol}

Mass of water produced = 72 grams

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6 0
3 years ago
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Most binary stars might appear wobble. One of the stars often appears brighter than the other.

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