09/21/18
Which process occurs only in autotrophic organisms?
Which process occurs only in autotrophic organisms?
Reading Science—Plasma Membrane and Movement of Materials
Paragraph 1 mentions the term semipermeable. What is the correct definition of semipermeable?
09/21/18
Diammonium phosphate (DAP) react with Sodium hydroxide
The goal is to make anhydrous ammonia
09/21/18
A 14.5 gallon gasoline tank is 3/4 full. How many gallons will it take to fill the tank?
This math problem was on a text I failed and there are retakes I forgot how my teacher did it in class. Could u help me please?
09/20/18
Specific Heat
Hello!
I was doing a lab and a sample of iron that had the same mass, and absorbed the same heat but had two different specific heat capacities. Why is the one that had a lower specific heat...
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09/20/18
A certain plant grows 1 1/6 every week. How long would it take for the plant to grow 6 1/2?
7th Grade Pre-Algebra Question.
09/20/18
Igor fills his bathtub at a rate of of 0.4 liters per second. Vladimir fills his bathtub at a rate of 25 quarts per minute. Whos would fill up faster
Igor fills his bathtub at a rate of 0.4 liters per second. Vladimir fills his bathtub at a rate of 25 quarts per minute. Which bathtub is filled at a faster rate?
09/20/18
Of elements in the same group those at the bottom of the periodic table have low ionization energies because?
answer with a correct answer
09/20/18
How many milliliters of 3 m ammonia can be prepared from 100 ml of concentrated ammonia (28.4 percent NH3 by weight, having a density of 0.808 g/ml)?
Please, help me!
09/20/18
Chemistry: Empirical & Molecular Formula
1) A compound containing only C, H and O was subjected to combustion analysis. A sample of 6.800×10-2 g produced 1.359×10-1 g of CO2 and 5.562×10-2 g of H2O. Determine the empirical formula of the...
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09/20/18
what is the difference(in formula and properties) between Iron phosphorus and Iron phosphate?
what is the difference(in formula and properties) between Iron phosphorus and Iron phosphate?
09/20/18
How many moles of hydrogen would be in 10.0 mL of methanol?
Methanol, CH4O is a liquid at room temperature and its density is 0.792 g/mL
09/19/18
Oxygen has three stable isotopes. What can you determine about the average atomic mass without calculating it?
Oxygen-16 0.99757
Oxygen-17 0.00038
Oxygen-18 0.00205
09/19/18
in a complete combustion reaction, 72.15g of pentane, c5h12(g) reacts with 300 g of oxygen
write the balanced chemical equation for this reaction
identify the limiting reactant
calculate the mass of carbon dioxide produced
determine the actual yield of carbon dioxide if the...
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09/19/18
Percent Yield Question: Chemistry
So I keep getting over 100% on my percent yield and can't seem to figure out why. The following question is:
Determine the percent yield of carbon dioxide if 1.70 g of carbon dioxide is...
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09/19/18
For each kilogram of a person's weight, 2.5 milligrams of a drug is to be given. What dosage should be given to a child who weighs
For each kilogram of a person's weight, 2.5 milligrams of a drug is to be given. What dosage should be given to a child who weighs 8989pounds? Use the fact that 1 l b almost equals 0.45...
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09/19/18
Phosphoric acid H3PO4 has three dissociable protons (it is triprotic) thus three pKa values; 2.12, 7.21, and 12.32). What volume of 200 mM phosphoric acid and w
Phosphoric acid H3PO4 has three dissociable protons (it is triprotic) thus three pKavalues; 2.12, 7.21, and 12.32). What volume of 200 mM phosphoric acid and whatvolume of 500 mM NaOH are required...
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09/18/18
The arrow shows that the bond between the chlorine atom and the fluorine atom is . The electrons in the bond are pulled , and the chlorine atom is
helpphhgggggggggg
09/18/18
Hannah buys 2 1/2 pounds of dried fruit for $1.50. How much is she paying for 1 pound of fruit?
math problem fractions and proportional
09/18/18
maximum number of electrons - quantum numbers
In an atom, what is the maximum number of electrons that can have the following quantum numbers?
(a) n = 4, ms = -1/2 (b) n = 7, l = 4 (c) n = 4, l = 1, ml = +1 (d) n = 5, l = 2, ml = +1
09/17/18
Is salt a compound, element, mechanical mixture, suspension mixture or solution mixture?
Is salt a compound, element, mechanical mixture, suspension mixture or solution mixture?
09/17/18
How many hours are in exactly two weeks
Show all work and circle your final answer using the correct units
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