Recent Homework Questions About Substance Abuse
A solution contains 10.05 grams of an unknown covalent substance in 50.0 grams of water. The freezing point of this solution is (-) 3.16o C. What is the formula weight of the unknown compound?
Friday, October 11, 2013 at 9:36am
A solution contains 10.05 grams of an unknown covalent substance in 50.0 grams of water. The freezing point of this solution is (-) 3.16o C. What is the formula weight of the unknown compound? Below is what I tried, but don't know what to do next. Please explain step-by-...
Friday, October 11, 2013 at 3:33am
the half life of the carbon isotope C14 is about 5700 years. A. about how many years does it take 1000 grams of this substance to decay to 500 grams? B. about what percent of the original amount would you expect to find after 1000 years?
Wednesday, October 9, 2013 at 10:10pm
First, you must have the specific substance to know its chemical formula (whether it's H2O, NH3, NaOH, etc.) And then you'll get its molar mass. To get its molar mass, just add the individual masses of the elements in the chemical formula. For instance, MM of H2O: 2*1...
Monday, October 7, 2013 at 11:17pm
What are you serving? Drinks? Ice Cream? Vegetables? How about Googling the specific substance and adding the key word, "calories," if that is what interests you? For example: https://www.google.com/search?client=safari&rls=en&q=vanilla+ice+cream+calorie+c...
Monday, October 7, 2013 at 9:14pm
Found. Addict & Substance Abuse
Since this is not my area of expertise, I searched Google under the key words "effective aftercare plan for alcohol/drug abusers" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=effective+aftercare+plan+for+alcohol/...
Thursday, October 3, 2013 at 8:46pm
Nope. Seawater is a mixture of bunches of things. H2O2 is the pure substance of the group. Technically, however, one can't buy PURE H2O2. It is sold as 3%, 30%, 90% H2O2 with different percentages between. The usual diluent is H2O.
Thursday, October 3, 2013 at 1:59pm
Gabby, I don't like the questions. I think some have more than one answer. Here is my take; you can make up your mind about how to answer. 1) A(n)_________ is made up of two or more different atoms that are chemically combined.(1point) Compound Molecule*** Element Atom A ...
Thursday, October 3, 2013 at 1:36pm
1. Which of the following is one way to prevent the corrosion of iron? A. Paint exposed iron parts with protective paint. B. Protect the iron from polluted air. C. Add carbon to the iron. D. Let the iron develop a natural coat of carbonate. 2. The source of the sun's heat ...
Thursday, October 3, 2013 at 9:57am
At the end of most landing runways in airports, an extension of the runway is constructed using a special substance called formcrete. Formcrete can support the weight of cars, but crumbles under the weight of airplanes to slow them down if they run off the end of a runway. ...
Monday, September 30, 2013 at 2:50pm
Calculate the density of a substance in pennyweights that has a volume of 0.287hogsheads and a mass of 55.25kg. 1 pennyweight= 1.55g 1 hogshead=238.5 liters 1 peck=9.091 liters Answer in pw/pk.
Saturday, September 28, 2013 at 11:21pm
the substance which allows heat radiations to pass through is.a)iron b)water vapour c)wood d)dry air
Saturday, September 28, 2013 at 5:41am
An object with a mass of 70g and a volume of 100ml is most likely what substance
Thursday, September 26, 2013 at 7:14pm
In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B. How many molecules of substance B are produced when 26.5 g of substance A reacts? The molar mass of substance A is 21.9 g/mol. Step 1: Convert the mass of A to moles. Step 2: ...
Tuesday, September 24, 2013 at 10:07pm
First, we have to get the molar mass of aniline. Just get a periodic table and add the individual masses of the elements in the chemical formula: C6H5NH2: 6*12 + 5*1 + 1*14 + 2*1 = 93 g/mol Then we get the mass of aniline using the given density and volume. Recall that density...
Monday, September 23, 2013 at 7:01am