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# Chemistry

Helmer Homenick

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2021-11-08 19:35:21
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Cards in this guide (32)
What is an intensive property

In chemistry, an intensive property is a property that depends on the type of matter in a sample.

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.

Which process would be most appropriate to separate a mixture

Filtration. :)

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

Molten iron is extremely hot averaging about 1500C The specific heat of iron is 0.46 JgC How much heat is released to the atmosphere when 1kg molten iron cools to room temperature 25C

0.46 * 1475 = 678.5 Kjoules (The specific heat is given in terms of joules/ gramme/degC, whilst the question refers to 1kg ie 1000g )

Is melting point extensive or intensive

Intensive

Which of these is an extensive property of matter

volume

Is electric conductivity extensive or intensive

why electrical conductivity is an intensive property of matter

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

6.28cm3

Is width extensive or intensive

extensive

Carl's teacher has asked him to separate a mixture of sand and iron filings Which of these methods would correctly separate the mixture

the correct answer would be -( magnetic attraction of one part )

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 Î”t, where q is amt of heat gained or lost, C is specific heat capacity, and Î”t is change in temperature.

Known:

q = 2000J

m = 4g

Î”t = 5oC

Equation:

C = q/mÎ”t

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.

Choose the correct units to determine specific heat

joules/ (0celsius)(grams)

Which of these could not be used to indicate a chemical reaction

change of shape

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

How many eggs will be needed to make enough ice cream to feed everyone one serving

it depends on how many people eating it and how big there servings want to be

Classify copper tubing as homogenous or heterogenous

Copper tubing is homogenous.

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

homogeneous

Classify this property as intensive or extensive height

extensive

Classify this property as intensive or extensive width

Width is extensive.

Classify this property as intensive or extensive Click on the correct answer texture

Texture is an intensive property, because the texture of a material does not change dependent on the amount of the material that is measured.

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

Which of the following is not a description of a physical property height density flammability melting point

flamability

While doing a demonstration for his class Mr Mathras dropped a peasized piece of silver solid into a beaker of distilled water The solid began fizzing then swirling before bursting into a yellow flame

Yellow flame

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.

What classify melting point property as intensive or extensive

Melting point is an intensive propery because doesn't depend on the mass of sample.

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