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scZoUnD [109]
2 years ago
14

The average American is looking at their phone for 6.25 hours a day. How many hours will the average American spend on their pho

ne if they live to be 77.7 years old?
Chemistry
1 answer:
julia-pushkina [17]2 years ago
8 0

Answer:

177253.125hrs

Explanation:

Given parameters:

  Number of hours spend per day on phone  = 6.25hrs

 Unknown:

Average hours pend by an average American if they lived for 77.7yrs

Solution:

Let us find the number of hours an average American spends on their phone per year;

    there are 365days in a year

 Number of hours  = 365 x 6.25  = 2,281.25hrs

Now, if they lived for 77.7yrs;

  They will spend  = 77.7 x 2,281.25 = 177253.125hrs

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<span>Electronegativity is the property of an element that measures the ability of it to attract and form electron bonds. The trend in the periodic table in terms of electronegativity decreases from right to left and from top to bottom. In the case of period 4, the element with the highest electronegativity is bromine. </span>

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3 years ago
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How many grams of Co are needed to react with an excess of fe203 to produce 156.2 g FE? show your work.
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The reaction is given as

Fe2O3 (s)+ 3CO(g)--->3CO2(g)+ 2Fe(s)

No.of moles=mass in gram/molar mass

As for Fe mole =156.2g/55.847=2.7969~2.797

The ratio b/w CO and Fe is 3:2

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3 years ago
Which of the following statements concerning the measured number 0.3030
Dennis_Churaev [7]

Answer:

C

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If you move the decimal to the left it transforms the expression into scientific notation.

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3 years ago
What will happen if the concentration of water inside a cell is higher than the concentration of water outside a cell?
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If the concentration of water inside a cell is higher than the concentration of water outside a cell, osmosis will take place, as water will move from an area of low solute concentration inside the cell to higher solute concentration, outside the cell.
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3 years ago
A potted plant is placed under a grow lamp, which provides 6,400 J of energy to the plant and the soil over the course of an hou
STatiana [176]

Answer:

823.7g

Explanation:

Using the formula as follows:

Q = m × c × ∆T

Where;

Q = amount of heat (J)

m = mass of substance (g)

c = specific heat capacity (J/g°C)

∆T = change in temperature (°C)

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m = ?

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Using Q = mc∆T

m = Q ÷ c∆T

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3 years ago
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