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olga nikolaevna [1]

3 years ago

15

115 grams of solid aluminum perchlorate are dissolved in 504 ml of water at 20°C. Calculate the concentration of aluminum perchl

orate in parts-per-million.

1 answer:

Alecsey [184]3 years ago

7 0

Answer:

I think the awnser is 1150 ppm im not too shure though

Explanation:

I tried to do the math but i could not find a very reliable formula

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What Period # is this element found in? P

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15 is the group that phosphorus is found in.

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Millikan's experimental results allowed him to determine the charge of the electron

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The statement above is true. He conducted the oil-drop experiment which lead him to determine the charge of the electron. He suspended charged droplets into an oil which is in between two electrodes and balancing the upward force with the downward forces.

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3 years ago

The maximum number of electrons in a single d subshell is:

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10 electrons

Explanation:

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4 years ago

Deuterium is an isotope of hydrogen (H) that has:

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A. 1 proton and 1 neutron

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3 years ago

A runner runs 4339 ft in 7.45 minutes. What is the runner's average speed in miles per hou 6.62 mi/hr O 0.110 mi/hr 6.618 mi/h e

slavikrds [6]

<u>Answer:</u> The average speed of the runner is 6.618 miles/hr

<u>Explanation:</u>

Average speed is defined as the ratio of total distance traveled to the total time taken.

To calculate the average speed of the runner, we use the equation:

$\text{Average speed}=\frac{\text{Total distance traveled}}{\text{Total time taken}}$

We are given:

Distance traveled = 4339 ft

Time taken = 7.45 mins

Putting values in above equation, we get:

$\text{Average speed of runner}=\frac{4330ft}{7.45min}=582.42ft/min$

To convert the speed into miles per hour, we use the conversion factors:

1 mile = 5280 ft

1 hr = 60 mins

Converting the speed into miles per hour, we get:

$\Rightarrow \frac{528.42ft}{min}\times (\frac{1miles}{5280ft})\times (\frac{60min}{1hr})\\\\\Rightarrow 6.618mil/hr$

Hence, the average speed of the runner is 6.618 miles/hr

6 0

4 years ago