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Chemistry

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Helmer Homenick

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Cards in this guide (15)
On a trip to Italy Cheyne rented a car to tour the country As he turned onto the highway he noticed that the speed limit was 95 kmh How fast can Cheyne drive in mph

Cheyne can drive 59 mph.

It takes an electrician 45 minutes to wire an office in a new office building that is being built The electrician signed a contract to wire all offices on 6 floors of the new building There are 50

5.62 weeks

Calcium chloride is often used to de-ice roads in the winter What volume would 15.7 g calcium chloride occupy

6.28cm3

What is the specific heat of an unknown substance if 2000 J of energy are required to raise the temperature of 4 grams of the substance 5 degrees Celsius

q = m x C x Δt, where q is amt of heat gained or lost, C is specific heat capacity, and Δt is change in temperature.

Known:

q = 2000J

m = 4g

Δt = 5oC

Equation:

C = q/mΔt

Solution:

C = 2000J/4g5oC = 2000J/20goC = 100J/goC

Is texture extensive or intensive

Texture is classified as intensive.

George intentionally threw a snowball directly at Chris The fact that the snowball will continue in the direction of Chris after leaving George's hand is an example of the snowball's

inertia

Is 46 cm long a chemical property

No, it is a physical property. It is a description of physical dimensions.

Stella described her chemistry notebook as being a green rectangle with curved edges It measured 30.0 cm x 22.1 cm What kind of properties did Stella describe

physical properties (:

How many volunteers will he need if each volunteer can distribute 225 brochures in one hour

20 Volunteers

Classify this property as homogenous or heterogenous Click on the correct answer

homogeneous

Classify this property as intensive or extensive width

Width is extensive.

Thuy's mother asked her to mix some baby formula by adding two scoops of the powdered formula mix to one liter of water then stirring well When she has correctly made the baby formula what will Thu

solution or mixture

Thuy mixed some baby formula by adding two scoops of the powdered formula mix to one liter of water then stirring well When she has correctly made the baby formula what will Thuy have also made

"solution" or "mixture"

A 050g ball of aluminum foil absorbs 1.42j heat when it is heated 31.6c what is the specific heat of aluminum foil

0.90 J/g°c

How many hours does a psycriatrist work ina day and how many days a week

A psychiatrist works an average of 8 hours per day, 5 days per week.

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