142 Answered Questions for the topic Chemistry Conversion

09/28/18

#### If 125. mg of fluorine-18 is shipped at 10:00 A.M., how many milligrams of the radioisotope are still active after 330 min ?

Chemistry 106, conversion is involved

09/18/18

#### what is the volume in gallons of 125 lb of gasoline the density of gas is 0.68 g/cm3

Chem equation

09/16/18

#### A pound of coffee beans yields 60 cups of coffee (4 cups = 1 qt). How many milliliters of coffee can be obtained from 1.0 g of coffee beans?

That was the whole question. and my answer needs to be 4 sig digs

09/08/18

#### a vehicle gasoline has many slightly different compositions depending on local laws. however, on average it has a density of 0.737 g/ml this morning dr. knox pu

a vehicle gasoline has many slightly different compositions depending on local laws. however, on average it has a density of 0.737 g/ml this morning dr. knox pump 7.2 gallons of gasoline in order...
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09/07/18

#### Combustion Chemistry

Complete combustion of 5.90g of a hydrocarbon produced 18.1g of CO2 and 8.63g of H2O. What is the empirical formula for the hydrocarbon?

09/05/18

#### 2.70 g/cm^3 converted to kg/m^3

for my answer on my calculator I get 2700 g/m^3 But I’m not sure if I write 270. g/m^3 as my final answer because of the rounding to the least significant figure rule which we started with 2.70...
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09/05/18

#### If a car travels to New York at 65.0m/s. How would this be represented in km/hr

Please help

09/03/18

#### A 1.50 cm3 sample of metal is found to weigh 8.91 g. Calculate the density of the metal in units of g/cm3 and g/mL. Be sure to answer all parts.

A 1.50 cm3 sample of metal is found to weigh 8.91 g. Calculate the density of the metal in units of g/cm3 and g/mL. Be sure to answer all parts.

08/25/18

#### How to convert fahrenheit to kelvins

The temperature of your armpit in kelvins (21°F) is equal to it's temperature in celsius plus 273

08/14/18

#### How many drops of antibiotic should the marine biologist apply?

The average blue whale has a length of 2500 centimeters. The distance from Jupiter to Saturn is 6.46 x 108 km. How many blue whales lined up tip to tail would it take to reach Saturn from Jupiter. ...
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08/14/18

#### How fast is Apple riding in centimeters/second

Mr. and Mrs. Applebee are planning a birthday party for their daughter, Apple. Apple would like to have an apple bobbing game at her party. Mr. and Mrs. Applebee buy a bucket that boasts it will...
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08/14/18

#### Round answer to four significant figures

A college student, Timmy, works as a dishwasher at a restaurant for a 12 hour shift on Saturday and Sunday every weekend making $12.00 an hour. If the cost of gas is $3.00 per gallon, how many...
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07/20/18

#### Question about how significant digits work in chemistry.

I'm doing my online chemistry summer class and significant digits are included, of course. But I'm confused about them because everything I believe is being contradicted. Here's what I...
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07/19/18

#### calculate the number of mole in 2400g. of co.2

calculate the nimber of moles in 2400g. caco.2

07/11/18

#### What is the pressure in a 10.00 liter container of methane, CH4(molarmass=16.05 g/mol) that contains 4.00 g of the gas at 25.0•c?

A. 0.610atm
B. 0.305atm
C. 1.07atm
D. 10.7 atm

06/14/18

#### the factors influencing purity, eg during recrystallisation, filtration and drying of an organic compound.

I need help with this question

06/14/18

#### evaluate the accuracy of the measurements made, contrasting them with wet techniques, where eg. (determination of Cu2+ concentration by titration and

by colourimetery

05/26/18

#### Determine the empirical formula for a compound that is 32.4g carbon, 6.81g hydrogen and 10.79g oxygen.

i need to know how to write the empirical formula

05/23/18

#### what is the right formula?

Suppose synthesis of Al2O3 is done in the lab using 20.50 g of Al and excess of O2. Upon purification, 35.48 grams of Al2O3 is produced. What is the percent yield of Al2O3?

04/29/18

#### Chemistry: Stoichometry

A 1.00 gram sample of potassium bicarbonate is decomposed by heating. If the resulting potassium carbonate weighs 0.725 grams and the calculated yield is 0.776 grams, what is the percent yield?

04/29/18

#### Chemistry: Stoichometry

Lithium metal decomposes in water and releases hydrogen gas. If 275 mL of hydrogen gas are produced at STP, what is the mass of lithium that reacted.
Li + H2O -> LiOH + H2

04/29/18

#### Chemistry: Stoiciometry

A Student used 4.55 grams of salicylic acid, along with acetic anhydride, to prepare aspirin.C7H6O3 + C4H6O3 -> C9H8O4 + C2H4O2(salicylic) (acetic an) (aspirin) (acetic acid)(a)Find the...
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04/24/18

#### How much .2 M NaOH would you need to add to neutralize 30mL of .5 M HCl

How much .2 M NaOH would you need to add to neutralize 30mL of .5 M HCl

04/18/18

#### Calculate the number of moles that contain 4.50 x 10 to the 24 power atoms of zinc

4.50 x 10^24 of zinc

04/05/18

#### a gas occupies a volume of 140mL ate 35. Celsius and 97kPa. what is the volume of the gas at STP?

I'm not sure how to find the answer to this problem.

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