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100
The chemical formula for glucose is C6H12O6. How many elements are in glucose?
What is 3.
100
Which of the following substances is a compound? C, NH3, Co, K
What is NH3
100
Which of the following would be found only in an Element ? Is a pure substance, made from more than one element, formed through a chemical reaction, found on the periodic table, essential for life, found on earth.
What is a pure substance and found on the periodic table.
100
Two liquids are mixed together. Which of the following does NOT identify the formation of a new substance? F A gas is produced. G One liquid dissolves into the other. H The temperature changes. J A solid is formed.
What is G- One liquid dissolves into the other
100
A student had a beaker with a small amount of baking soda. The student added a few drops of pickle juice to the baking soda and observed fizzing and bubbling. Based on observation, which of these can the student conclude? F A chemical reaction produced a solid. G No chemical reaction took place. H Only a physical change happened. J A chemical reaction produced a gas.
What is J A chemical reaction produced a gas.
200
Which of the following can be found in both an element and a compound? Is a pure substance, made from more than one element, formed through a chemical reaction, found on the periodic table, essential for life, found on earth.
What is essential for life, found on earth.
200
During a science class investigation, a teacher places a small amount of sugar in a spoon and heats it over a candle. Which of the following would be the best evidence that a change in the chemical properties of the sugar has taken place? F The sugar gets hotter. G The sugar gets larger. H The sugar turns into a liquid. J The sugar turns black.
What is J The sugar turns black.
200
A new compound has just been developed. Its formula is: COFeHNCoBNa. How many different elements make up this compound?
What is 8
200
Which safety equipment is most important for the student to use during an investigation involving a chemical reaction? F Latex gloves G Beaker tongs H Safety goggles J Fire extinguisher
What is H Safety goggles
200
Which scientific equipment does a student need to conduct an investigation which requires measuring mass and the volume of liquids? A Graduated cylinder, spring scale B Graduated cylinder, triple beam balance C Beaker, spring scale D Paper cup, triple beam balance
What is B Graduated cylinder, triple beam balance
300
What do the letters Na and Cl represent in the chemical formula NaCl? A Mixtures B Compounds C Elements D Molecules
What is C Elements
300
MCO3 → MO + CO2 The products in the chemical equation above are best classified as — A one compound and one element B two elements C one element and two compounds D two compounds
What is D two compounds
300
Which of the following would on be found in a compound? Is a pure substance, made from more than one element, formed through a chemical reaction, found on the periodic table, essential for life, found on earth.
What is made from more than one element, formed through a chemical reaction.
300
The following is a chemical equation that represents the law of conservation of mass. 8 CO + 17 H2 → C8H18 + 8 H2O Which substance in the above equation represents an element? F CO G H2 H C8H18 J H2O
What is G H2
300
Which of the following is a compound? F Co G Fe H H J CO
What is J CO.
400
Water has the chemical formula H2O. Which statement correctly states the number of hydrogen and oxygen atoms present in the chemical formula for water? A There is an equal number of hydrogen and oxygen. B There is one hydrogen atom for every two oxygen atoms. C There are two hydrogen atoms for every one oxygen atom. D There are two hydrogen atoms for every four oxygen atoms.
What is C There are two hydrogen atoms for every one oxygen atom.
400
The smallest particle of an element maintaining the chemical identity of that element.
What is an atom
400
Made of a blend of elements and compounds; is not a pure substance because it does not have consistent properties.
What is a mixture.
400
A measure of how much matter is present in a substance.
What is mass
400
A measure of how much space matter occupies.
What is volume
500
_____ is anything that has mass and takes up space. ______ occurs as elements, compounds, and mixtures.
What is matter
500
Any form of matter that is uniform throughout and has consistent properties
What is substance
500
Pure substance made of two or more kinds of atoms bound together
What is a compound
500
A pure substance composed of the same type of atom throughout
What is an element
500
All water on Earth: oceans, surface water, ground water, and glaciers; made of a limited number of elements and primarily composed of oxygen and hydrogen, the two elements in pure water
What is hydrosphere
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