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How to model water flow when only a couple of sample points available?

Chemistry confusion...10 points to the best answer!?

  • For which of the following activities might you want to hire a chemist? building a wood storage shed examining the structure of plant cells testing a rock sample for gold content building a fence 2. Which of the following procedures involves a physical change in one of the substances? creating salt by reacting sodium metal and chlorine gas allowing a nail to rust building a model rocket propelled by mixing baking soda and vinegar grinding chalk into a fine powder 3. You have three molecules of glucose (3C6H12O6). How many carbon atoms do you have? 3 6 18 36 4. Which of the following is a homogenous mixture of two or more pure substances? coffee water alcohol hot chocolate 5. Which of the following is a chemical property? ability to react with oxygen ability to become magnetic ability to conduct electricity ability to conduct heat

  • Answer:

    Surely you jest! testing a rock sample for gold content. Of course, chemists CAN build sheds and fences grinding chalk into a fine powder 18 alcohol. This is the best answer, but it's wrong. Any pure alcohol is a single substance, but we have to assume they mean ethanol (not absolute, which IS a single substance. ability to react with oxygen What a sloppy quiz! Surely your teachers can give better homework assignments. The language of science is the language of logic and precision. This quiz exemplifies neither.

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Other answers

1 testing a rock sample for gold content 2.grinding chalk into a fine powder 3.18 4. IDK 5.ability to react with oxygen LOL I got a 90% in my Chem Class =p

McMuffin

1.testing a rock sample for gold content because examining the structure of plant cells is biology not chemistry. 2. grinding chalk into a fine powder because you are not making a new substance it is just in a different state. 3. 3x6= 18 4. water because H and O (hydrogen and oxygen) elements are used to make the it. 5. ability to react with oxygen because it is reacting and when something reacts its forming a new substance.

shelbi

1) testing a rock sample for gold content 2)grinding chalk into a fine powder 3)6 4)alcohol 5)ability to react with oxygen

sassygyrl

1. examining the structure of plant cells - Central to understanding the structure is the chemistry involved. Different chemicals show up as different colors and that tells us what its made of. 2. allowing a nail to rust - A physical change is something your can perceive; you can taste or smell, etc. When the nail rusts you can see the color red, a property of a physical change. 3. 3 - the number preceeding the molecular abbreviation tells you how many their are. 4. hot chocolate - water, milk, chocolate and marshmellows, all homogenously mixed together. 5. Electricity - Ben Franklin and Alexander Bell were chemists.

Jake T

1.examining the structure of plant cells 2.grinding chalk into fine powder 3.3 4.alcohol 5ability to react with oxygen

I C

1. testing a rock sample for gold content 2. grinding chalk into a fine powder 3. 18 (3 molecules, each has 6 carbons; 3 x 6 =18) 4. alcohol 5. ability to react with oxygen

Be Positive!!!

1.examining the structure of plant cells 2.grinding chalk into a fine powder 3.18 4.Hot chocolate 5.ability to react with oxygen

Anthony S

c d a d a

T.P.

haha your trying to get me to do your homework..

Joita M

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