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

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... more

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.

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?

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... more

09/20/18

4000 devided by 19 is equal to 210 how can it possible ?

4000÷19=219

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?

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

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... more

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... more

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... more

09/19/18

the smallest biological structural units of the body.

i dont know the answer please help  

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... more

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

3 physical properties of Diet Coke

3 physical properties of Diet Coke

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?

How many hours are in exactly two weeks

Show all work and circle your final answer using the correct units 

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