Chemistry » Page 116

Chemistry

Liliana Gillespie

Matter only moves if a force pushes or pull it true

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Chemistry

Zhang

What substance cannot be decomposed by physical or chemical means?

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Chemistry

Gracelyn Lopez

Paula is camping with her family. After their parents light a fire, Paula and her sister stand nearby to warm their hands. Her sister thinks that conduction warms their hands. Paula disagrees. Explain all methods of heat transfer taking place as they warm their hands.

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Chemistry

Winston

What does it take to prove a hypothesis false?

O

A. It is impossible to prove a hypothesis false

O

B. At least ten examples

O

C. One counterexample

O

D. A poorly stated question

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Chemistry

Tilly

What new inforamtion can you add the your definition of physical change?

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Chemistry

Micheal

What are groups 1, 2, and 3 examples of on a periodic table of elements?

A) Metals

B) Nonmetals

C) Metalloids

D) Noble gass

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Chemistry

Marlon Dunn

What is the complete balanced equation for the reaction that occurs when lithium carbonate (Li2CO3) is heated?

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Chemistry

Guest

Which statement best compares coastal ecosystems to open ocean ecosystems?

Coastal ecosystems include abyssopelagic depths, and open ocean ecosystems do not.

Coastal ecosystems have less sunlight, fewer nutrients, and less diversity than open ocean ecosystems.

Coastal ecosystems have a greater range of water pressures than open ocean ecosystems.

Coastal ecosystems have more sunlight, more nutrients, and higher levels of productivity than open ocean ecosystems

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Chemistry

Guest

If you are given a 1.0 L (1000mL) of an unknown liquid which has the mass of 500 grams it is most likely which of the above substances? Show work to back up your answer. Distilled water density 1.0 g/cm^3 propane density 0.494 g/cm^3 salt water density 1.025 g/cm^3 liquid gold density 17.31g/cm^3

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Chemistry

Sarah Bowen

When 3.05 moles of ch4 are mixed with 5.03 moles of 02 the limiting reactant is?

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Chemistry

Daffodil

How does hydrogen bonding affect water molecules

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Chemistry

Justice Mcknight

What happens to the chemical structure of water when it changes states

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Chemistry

Kai Cordova

How much water can be raised from 25*C (room temperature) to 37*C (body temperature) by adding the 2,000 kJ in a Snickers bar?

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Chemistry

Ismael Colon

The components of a typical Arabic thali to find out whether it is a balanced diet or not?

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Chemistry

Clarence Herrera

In terms of spacing of particles what would be necessary to change from solid to gas what is the process called and how is it achieved

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