09/19/17

what is the mass in grams of an oak cube with the volume of 8 centimeters
it is a small cube and is wooden and it floatTS DENSITY MASS volume prediction result material grams centimeters 
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09/19/17

When hydrogen reacts with oxygen, the product is water. If you produce 36 grams of water from 4 grams of hydrogen, how many grams of oxygen reacted?
When hydrogen reacts with oxygen, the product is water. If you produce 36 grams of water from 4 grams of hydrogen, how many grams of oxygen reacted?
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09/19/17

how many moles of oxygen gas were evolved?
A test tube containing a mixture of KCl, KClO3, and MnO2, having a total weight of 23.584g was heated to decompose the KClO3. After heating, the mass was found to be 22.347g.  a) How many moles of... more
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09/19/17

Hess Law, Find enthalpy change of combustion reaction through enthalpy change of 2 other reactions
Chemistry: Find the enthalpy change of the reaction: 2KHCO3 --> CO2 + H2O + K2CO3 ΔH1 Through using these equations and constructing a Hess's diagram: K2CO2 + 2HCl --> 2KCl + H2O + CO2 ΔH2... more
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09/19/17

are the any protein receptor in necleaus?
protein recptor
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09/18/17

what percentage of the mixture is a salicylic acid if 1.94 g of the acid was isolated from 12.1 g of the mixture?
find the percentage
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09/18/17

A merchant blends tea that sells for $5.85 a pound with tea that sells for $2.85 a pound to produce 90 lb of a mixture that sells for $3.25 a pound. How many p
(end of question) pounds of each type of tea does the merchant use in the blend?
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09/18/17

Why there oxygen on Occean water near the equator than in water at higher latitudes?
This question about chemistry.
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09/18/17

Chemistry Conversion
  Need some help with conversion 32 m = _ mm 7 kg = _ gg 70 mm = _ nm 632 cL = _ kl 1 um = _ mm 5413 mg = _ g 0.00321 kg = _cg 4.9 L = _ mL 3149.69 L = _kL 0.012 Mg = __ g
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09/18/17

ou work in a lab. One day you need 88 oz of a chemical solution consisting of three parts alcohol and five parts acid. How much of each should be used?
How much of each solution do I need?
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09/18/17

Calculating acetate buffer's pH and the amount of chemicals required to make it.
1. How many milliliters of 0.1M CH3COOH(pKa=4.75) and 0.1M CH3COONa does it take to make 400 milliliters of 0.1M pH 4.5 acetate buffer? 2. What will be buffer solution's pH, when 10mL of 1M NaOH is... more
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09/18/17

A radioactive isotope decays by 50% each month. How many months will it take until the amount of radioactive isotope has decreased to 3.125% of the original amo
I need the answer because I don't get it
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09/18/17

how many liters of 60 % alcohol solution and 30% alcohol solution must be mixed to obtain 3 liters of 40% alcohol solution
I don't have any additional solutions  
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09/17/17

What is the concentration
What is the concentration (in mol L-1) of 12.5 mg of each of disopyramide phosphate and lidocaine hydrochloride dissolved in 250 mL?
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09/17/17

Chemistry question
If 20 mg of a drug is dissolved in 250 mL of solvent, how many mg of the drug are present in 5 mL of that solution?
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09/17/17

Consider the reaction 2H3PO4→P2O5+3H2O Using the information in the following table, calculate the average rate of formation of P2O5 between 10.0 and 40.0 s. Ti
Introduction to Reaction Rates.A
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09/17/17

What is the instantaneous rate of the reaction at t=800. s? Express your answer to two significant figures and include the appropriate units.
2.Average and Instantaneous Reaction Rates.C
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09/17/17

What is the average reaction rate between 0. and 1500. s? Express your answer to three significant figures and include the appropriate units.
2.Average and Instantaneous Reaction Rates A.
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09/17/17

Enzymes work well in our bodies at a ph around 7
enzymes work well in our bodies at a ph around 7
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09/16/17

0.5401 in scientific notation
please help
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09/15/17

Will the evolution of a pacient acute pancreatitis be more likely influenced by: palpation of an abdominal tumoral mass or by blood triglycerids over 180mg%?
Homework assignment.. :(
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09/15/17

So i am having alot of problems in scientific notation. with these questions
The diameter of the average cell in the human body is 1x10^-5 meters. The diameter of a grain of sand is about 2x10^-4 meters. The diameter of a human hair is about 0.000025.   Part A: what is... more
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09/15/17

Find a number which when increased by 10% becomes 77
 Find a number which when increased by 10% becomes 77
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09/14/17

What is the necessary volume and molarity to dilute sulfuric acid to have a pH of 4?
For my G4 experiment, I was tasked to explore a topic that covered both chemistry in the environment and I immediately chose acid rain. When sulfur dioxide reacts with oxygen and water in the... more
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09/14/17

Ionic solids
In MgCl2, what particles occupy the crystal lattice points?
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