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3 years ago

Nick wanted to see how high an ice cube would float in different temperatures of water. Identify the independent variable.

Chemistry

2 answers:

xxTIMURxx [149]3 years ago

8 0

Answer:

E. temperature of the water

Explanation:

The independent variable is the variable that changes, and it's also the variable that the dependent variable's results depend on. So depending on the temperature of the water, results in the ice cubes height. So the independent variable is the temperature of the water.

a_sh-v [17]3 years ago

7 0

The answer is E. Temperature of water.

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Due to the accumulation of static charges/due to static electricity

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Which of the following statements correctly describes a difference between mechanical waves and electromagnetic waves?

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Answer:

<h2>Which of the following statements correctly describes a difference between mechanical waves and electromagnetic waves?</h2><h2><em>:- Mechanical waves require a medium to travel through, whereas electromagnetic waves can travel through empty space.</em></h2>

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2C_H. + 702 — 400, + 6H2O

astra-53 [7]

Balanced Eqn

By the Balanced eqn

60g ethane requires 7x32= 224g oxygen

here ethane is in excess.oxygen will be fully consumed

hence

300g oxygen will consume

⋅

300

224

80.36

ethane

leaving (270-80.36)= 189.64 g ethane.

By the Balanced eqn

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hence amount of CO2 produced =

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235.72

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235.72

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6 0

3 years ago

A typical adult human body contains approximately 2.500 L of blood plasma. How many grams of blood plasma are in the typical adu

kirill115 [55]

Answer:

$m=2.575g$

Explanation:

Hello,

In this case, since the density is defined as the ratio of the mass and volume:

$\rho =\frac{m}{V}$

We can compute the mass of blood as follows:

$m=\rho *V=1.03g/L*2.500L\\\\m=2.575g$

Best regards.

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3 years ago

You make an experiment to determine the percent mass of carbon in sugar. You find out that there is 46.63g of carbon in 75.00g o

Aleksandr [31]

Taking into account the definition of percentage composition, the percent composition of carbon in this sample is 62.17%.

<h3>Percentage composition</h3>

The Percentage Composition is a measure of the amount of mass that an element occupies in a compound and indicates the percentage by mass of each element that is part of a compound.

Then, the percentage by mass expresses the concentration and indicates the amount of mass of solute present in 100 grams of solution.

In other words, the percentage by mass of a component of the solution is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.

The percentage by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage. This is:

$percentageby mass= \frac{mass of solute}{mass of solution}x100$