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Chemistry Questions
CHEMISTRY
HIGH SCHOOL
On a mission to a newly discovered planet, an astronaut finds copper abundances of 69.97 % for 63Cu and 31.03 % for 65Cu. What is the atomic mass of copper for this location? The mass of 63Cu is 62.9300 amu . The mass of 65Cu is 64.9200 amu . Express your answer to two decimal places, and include the appropriate units.
CHEMISTRY
HIGH SCHOOL
How many moles of carbon are produced when 1745 g of glucose decomposes according to the following equation? C6H12O6 → 6C 6H2O
CHEMISTRY
MIDDLE SCHOOL
What scientists do that is the basis for their investigations
CHEMISTRY
MIDDLE SCHOOL
Which organic molecule is digested into simple sugar?
CHEMISTRY
MIDDLE SCHOOL
Which organic molecule is digested into simple sugar?
CHEMISTRY
HIGH SCHOOL
Cemistry counting atoms in compounds worksheet#7.0.1
CHEMISTRY
MIDDLE SCHOOL
If someone tells me that scientific knowledge cannot be changed or modified how would I answer that statement
CHEMISTRY
MIDDLE SCHOOL
You've just solved a problem and the answer is the mass of an electron, me=9.11×10−31kilograms. How would you enter this number into the answer box?
CHEMISTRY
MIDDLE SCHOOL
A block of wood has a mass of 120g and a volume of 200cm what is the density
CHEMISTRY
HIGH SCHOOL
What element has 25 protons?
CHEMISTRY
MIDDLE SCHOOL
the atomic number of barium is 56 what do you know about the subatomic particles in an atom of this element
CHEMISTRY
HIGH SCHOOL
Which of the following uses a nonrenewable energy resource to generate energy? A. nuclear power plant B. wind farm C. fireplace that burns wood D. biomass power plant
CHEMISTRY
HIGH SCHOOL
If the acetylene tank contains 37.0 mol of C2H2 and the oxygen tank contains 81.0 mol of O2, what is the limiting reactant for this reaction?
CHEMISTRY
HIGH SCHOOL
When sodium metal is added to water, an orange flame is observed on the metal surface. Based on this observation, what can best be concluded
CHEMISTRY
HIGH SCHOOL
Classical biotechnology dates back about _____ years ago. A.100B.1,000C.10,000D.100,000
CHEMISTRY
HIGH SCHOOL
The _______ receives digested food components and stores the glucose to be released into the blood stream for future use.A. liver B. stomach C. small intestine D. large intestine
CHEMISTRY
HIGH SCHOOL
Which professional is most likely to suffer damage from lead contamination?A. doctorB. farmerC. painterD. carpenter
CHEMISTRY
HIGH SCHOOL
The digestion process starts in the _____. esophagus stomach small intestine mouth
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