Stars, other than the Sun, are too far away from Earth to be studied by space probes. How are scientists able to study the
composition of a star that is located outside of the Solar System?
OA. by evaluating the different colors of light radiated by the star
OB. by evaluating the mass, density, and volume of the star
OC. by evaluating the air pressure in the atmosphere of the star
OD. by evaluating the kinds of sounds given off by the star
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Chemistry, 22.06.2019 03:00
Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture
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Chemistry, 22.06.2019 05:30
Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.
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Chemistry, 22.06.2019 10:00
Why is the structure of molecule important to its function?
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Chemistry, 22.06.2019 13:30
1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6
Answers: 2
Stars, other than the Sun, are too far away from Earth to be studied by space probes. How are scient...
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