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Chemistry
Chemistry
Middle School
can somebody help me name these organic compound plz
Chemistry
Middle School
Can somebody please help me with these ? how many moles of AI are needed to react with 6 moles of O2?
Chemistry
Middle School
Why do we use nuclear energy from power plants?
Chemistry
College
what is the reaction?
Chemistry
College
A characteristic that describe a plant that can make its own food is
Chemistry
High School
what are the rules for calculating protons
Chemistry
High School
3. The organelle that produces materials that need to be released from the cellis the:A. storage granuleB. microvilliC. chloroplastD. vacuole4. An organelle found in plant cells, fungi, and some protists, animal cells, andbacteria is the:A. storage granuleB. microvilliC. chloroplastDvacuole
Chemistry
Middle School
True or False: The dots are placed asfar apart as possible because theyrepresent electrons, with the samenegative charge, that repel each
Chemistry
Middle School
What type of bond is formed during dehydration synthesis?O Acarbon bonds between amino acidsB.carbon bonds between carbohydratesC. hydrogen bonds between lipidsO D. peptide bonds between amino acids
Chemistry
Middle School
There are several ways to model a compound. One type of model is shown.What is the chemical formula for the molecule modeled?a.CHOb.C4H11O2c.C6H12O2d.C6H9O
Chemistry
College
which is a type of heat transfer that causes the air at the top floor of a building to be hotter than the bottom floor of a building
Chemistry
College
In the following reaction 6.13 g of water is actually produced, but the theoretical yield of water is 8.17 g. What is the percent yield of this reaction? *85.0%72.0%75.0%67.0%
Chemistry
High School
what causes different colors to appear in the sky?
Chemistry
Middle School
A 350. mL air sample collected at 35 degrees C has a pressure of 556 mm Hg.What pressure will the air exert if it is allowed to expand to 425 mL at 57 degreesC? Show your work in the space below.
Chemistry
Middle School
Need help with these two pls!!
Chemistry
High School
Which describes the boundary where earthquake activity occurs along rift valleys? divergent boundary in the ocean divergent boundary on land convergent boundary in the ocean divergent boundary on land
Chemistry
College
In a titration, 100 mL of 0.026 M HCl (aq) is neutralized by 13 mL of KOH(aq). Calculate the molarity of KOH (aq).
Chemistry
College
If the mole fraction of Na2S in an aqueous solution is 0.125,what is the weight/weight %(percent by mass) of Na2S?
Chemistry
College
If you start with 6 mol of nitrogen gas (N2+) what mass (g) of ammonia (NH4) will be produced?
Chemistry
Middle School
What is the similarity between speed and vilocity
Chemistry
Middle School
Inside the retina of our eyes are receptors called rods and cones. Rods measure the brightness we see and cones determine _____. A) the color we seeB) the white we seeC) the dimness we seeD) the loudness we hear
Chemistry
College
0.5 moles of CO2 have a volume of 50 L and a pressure of 0.8210 atm. What must be the temperature of the gas?
Chemistry
College
Consider the half reaction below.2 upper C l superscript minu (a q) right arrow upper C l subscript 2 (g) plus 2 e superscript minus.Which statement best describes what is taking place?Chlorine is losing electrons and being oxidized.Chlorine is losing electrons and being reduced.Chlorine is gaining electrons and being oxidized.Chlorine is gaining electrons and being reduced.
Chemistry
High School
Determine whether these statements describe Geiger counters, scintillation counters, both, or neither. An amplifying device that indicates the presence of ionizing particles A device that permits determination of alpha and beta radiation emitted from a substance Film sensitive to radiation that is removed and developed to measure exposure A device used for monitoring individual cumulative exposure to ionizing radiation
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