Chemistry » Page 97

Chemistry

Baylee Richmond

The density of copper is 8.9 g/ml. How many Cm of copper are in 0.283kg of copper?

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Chemistry

Alisson Peterson

The molar volume of oxygen, O2, is 3.90 dm3 mol-1 at 10.0 bar and 200 degree centigrade. Assuming that the expansion may be truncated after the second term, calculate the second virial coefficient of oxygen at this temperature.

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Chemistry

Dania

Why is the dissolving process important?

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Chemistry

Destiney Edwards

Suzie Q wants to know the effect of different colors of light on the growth of plants. She believes that plants can survive best in white light. She buys 5 ferns of the same species, which are all approximately the same age and height. She places one in white light, one in blue light, one in green light, one in red light and one in the closet. All of the ferns are planted in Miracle-Grow and given 20 mL of water once a day for 2 weeks. After the two weeks, Suzie observes the plants and makes measurements. What is the independent variable in this experiment? The plant species The amount of water that each plant gets The amount of time The different types of light the plants were put under.

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Chemistry

Steven Wagner

zinc metal can be obtained from zinc oxide zno by reacting the oxide with the element carbon the products of the reaction are Zn and CO2 what mass in grams of zinc oxide is needed to react completely with 5.00 mol of carbon

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Chemistry

Giovanni Simmons

7. What is the maximum number of d orbitals in a principal energy level?

2

5

3

1

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Chemistry

Magdalena

Single called organism live in a pond behind school

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Chemistry

Delaney

Which of the following would most likely contain a fossil?

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Chemistry

Edwin Terrell

Karen measures the volume of gas at 200 K and 100 kPa. To correct her measurement to standard temperature and pressure (STP), what must she do?

A. make a volume correction based on a higher temperature of 273 K

B. make a volume correction based on a higher pressure to 200 kPa

C. make a volume correction based on a lower temperature of 73 K

D. make a volume correction based on a lower pressure of 50 kPa

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Chemistry

Mathias Wang

How do the atomic number and the

number of protons relate to one another?

The atomic number tells us the number

of protons

The atomic number is protons + neutrons

They do not

Electron Cloud

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Chemistry

Amiah Le

Ethanedioic acid, a compound that is present in many vegetables, has a molar mass of 90.04 g/mol and a composition of 26.7% Carbon, 2.2% Hydrogen, and 71.1% oxygen. Calculate the empirical formula and determine the compound formula.

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Chemistry

Markus Newman

When designing an experimental investigation, why is it important to test only one variable?

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Chemistry

Skinny Minny

A solution with a ph of 11 is first tested with phenolpthalein

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Chemistry

Andrews

Calculate the rate of emission of SO2 in g/s that results in a centerline (y = 0) concentration at ground level of 1.786 x 10-3 g/m3 one kilometer from the stack. The time of measurements was 1 P. M. on a clear summer afternoon. The wind speed was 2.0 m/s measured at a height of 10 m. The effective stack height is 96 m. No inversion is present.

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Chemistry

Lyons

How many sigma and pi bonds does it contain ch3chchco2h?

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