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Chemistry Questions
CHEMISTRY
HIGH SCHOOL
Which of the following is not a state of matter?A. solidB. liquidC. waterD. plasma
CHEMISTRY
HIGH SCHOOL
Light can be transmitted through long fiber optic strands because ofa. refraction.b. external diffraction.c. total internal reflection.d. interference
CHEMISTRY
HIGH SCHOOL
Stalactites and stalagmites are examples of _____.organic sedimentary rockcontact metamorphismextrusive igneous rockchemical sedimentary rock
CHEMISTRY
HIGH SCHOOL
Calculate the number of kilojoules to warm 125 g of iron from 23.5 °C to 78.0 °C.
CHEMISTRY
HIGH SCHOOL
Suppose that a certain fortunate person has a net worth of $79.0 billion ($7.90×1010). If her stock has a good year and gains $3.20 billion (3.20×109) in value, what is her new net worth?
CHEMISTRY
HIGH SCHOOL
Atoms gain or lose electrons to increase:a. reactivityc. stabilityb. nucleus sized. atomic mass
CHEMISTRY
HIGH SCHOOL
Silicon dioxide, SiO2, is a(n) _____
CHEMISTRY
HIGH SCHOOL
An atom of the element zinc has an atomic number of 30 and a mass number of 65. How many protons does an uncharged zinc atom have?30356595
CHEMISTRY
HIGH SCHOOL
Which is an example of a response?a. water lost from the lungs during breathingb. ivy growing around the pole of a fencec. the angle of the sun changing during the dayd. outside temperature dropping at night
CHEMISTRY
HIGH SCHOOL
When stressed, mica breaks into thin sheets. This describes mica's _____. luster color streak cleavage
CHEMISTRY
HIGH SCHOOL
a sample of ammonia contains 9g hydrogen and 42g nitrogen. another sample contains 5g hydrogen .calculate the amount of nitrogen in the second sample
CHEMISTRY
MIDDLE SCHOOL
Who discovered Chemical Energy?
CHEMISTRY
HIGH SCHOOL
Describe the pattern of reactions of metals with acids.
CHEMISTRY
HIGH SCHOOL
Why is CCl4 a nonpolar molecule, but PCl3 is a polar molecule?
CHEMISTRY
HIGH SCHOOL
What is the mass of 2.65 millimoles of sulfur?
CHEMISTRY
MIDDLE SCHOOL
A man relaxes in his hot tub after a day at work. his body temp is 98.6F and the water is 102Fhow does the heat transfer? A. Heat does not transfer between his body and the waterB. Heat transfers to his body from the water by conduction C. Heat transfers from his body to the water by convection D. Heat transfers from his body to the water by conduction Thank you !
CHEMISTRY
MIDDLE SCHOOL
Are spider multicellular
CHEMISTRY
MIDDLE SCHOOL
What would happen if a jar of helium gas was opened
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