83 Answered Questions for the topic Chemistry Measurement Word Problem

Chemistry Measurement Word Problem

02/15/16

#### specific heat problem

A 23.06 g sample of a substance is initially at 27.6 °C. After absorbing 2511 J of heat, the temperature of the substance is 178.2 °C. What is the specific heat (SH) of the substance?

02/08/16

#### Question is below. I need help I can't figure it out please show work and answer thanks!

There are 2 part to the question I figured out the first part but don't understand the second part Question part #1A solution is prepared by dissolving 25.0 g of sucrose (C12H22O11) in 377 g of...
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Chemistry Measurement Word Problem General Chemistry

02/08/16

#### Question is down below. Please help I'm having serious trouble with this. Please show work and answer. Thanks appreciate it!

this question has 2 parts I answered the first part but don't know how to do the second part. Question part #1 Suppose you wanted to find out how many milliliters 2.2 M AgNO3 are needed to provide...
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Chemistry Measurement Word Problem

02/05/16

#### density calculation

Please help me solve this problem. Thank you!!!
An empty graduated cylinder has a mass of 38.43 g. 3.4 mL of a liquid is added to the cylinder, which is then weighed. The mass of the cylinder...
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Chemistry Measurement Word Problem

02/03/16

#### word problem

Please help me solve this problem. Thank you
If the caffeine concentration in a particular brand of soda is 2.51 mg/oz, drinking how many cans of soda would be lethal? Assume 10.0 grams of...
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01/26/16

#### Please help... I need explanation and answers thank you!

Question #1A 1335 mL sample of oxygen (O2) was collected by displacement of water at 24 degrees celsius under a total barometric pressure of 425 torr. What mass of dry oxygen was collected? The...
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Chemistry Measurement Word Problem

01/26/16

#### mass of a single molybdenum atom is 1.59*10^-22 grams how many molybdenum atoms are there in 101 milligrams of molybdenum?

This question is from chemistry. I have tried but i cant please help me.

Chemistry Measurement Word Problem

12/14/15

#### The tarnish has a density of 72 lb/gal. What is its density in g/ml?

This is a problem I had stuck on my chemistry finals review worksheet. Thank you so much for the help!

Chemistry Measurement Word Problem

11/17/15

#### Empirical formula

When a 35.07 g sample of phosphorus reacts with oxygen, a 71 g sample of phosphorus oxide is formed. What is the percent composition of the compound? What is the empirical formula for this compound?

Chemistry Measurement Word Problem

10/27/15

#### Calculate the energy of a photon of red light with a wavelength of 6.59 x10-5 cm

I need to know how to calculate the energy of a photon of a red length with a wave lengh of 5.59 x 10 -5 cm

09/27/15

#### I really really need some help with this percent yield problem? General Chemistry?

Silver is reacted with excess mercury (II) chloride, producing a solid silver chloride precipitate. If the actual yield of 25.5 g silver chloride represents a 77% yield, how much silver was...
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09/26/15

#### Chemistry Percent Yield Problem? Can you please help me?

Silver is reacted with excess mercury (II) chloride, producing a solid silver chloride precipitate. If the actual yield of 25.5 g silver chloride represents a 77% yield, how much silver was...
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09/22/15

#### A sample of nitrogen gas, N2, contains 1.33 x 10 ^24 total atoms of nitrogen, N. How many moles of nitrogen molecules are present?

Can you please show your work? I keep trying a variety of different conversions, but I don't really even know where to start and how to get the correct answer. I would greatly appreciate any help -...
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09/20/15

#### Perform a rxn to obtain 5 g ethyl bromide. Assuming that a normal percentage yield is 85%, what min quantity of materials needed to give desired product

Density of ethyl bromide is 1.47 g/cm3
Molecular mass of ethyl bromide is 108.97 g/mol
I need the answer in mL ethanol and mL phosphorus tribromide

Chemistry Measurement Word Problem

09/20/15

#### the recommended pediatric dose of velosef is 20. mg /kg/day. What is the daily dose in mg for a child weighing 36 pounds?

i have no details.

09/20/15

#### How much PBr3 is required to react completely with 6.0 mL of ethanol?

this question is related to the balanced equation 3CH3CH2OH + PBr3 ----> 3 CH3CH2Br + H3PO3

Chemistry Measurement Word Problem

09/04/15

#### How many square miles is this?

the total area of US farmland is 9.54 x 108 acres.

08/25/15

#### Chemistry Question 3 Need Help ASAP

A laboratory experiment requires 2.0 L of a 1.5 M solution of hydrochloric acid (HCl), but the only available HCl is a 12.0 M stock solution. How could you prepare the solution needed for the lab...
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#### Chemistry 2 Gas Laws Word Problems

A sample of ammonia gas occupies 20.4 mL at 558 mm Hg and 25.2oC. If the volume of the gas is changed to 56.8 mL at 55oC, what is the new pressure? Enter mm for unit.
A sample of carbon monoxide...
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Chemistry Measurement Word Problem Chemistry Lab

05/07/15

#### what was the final temperature?

A 10.35g piece of copper metal was heated to 85.5 degrees C and then placed into 23.6g of water. the initial temperate of the water was 18.3 degrees C. what was the final temperature?
solid...
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02/19/15

#### A sample of gas under a pressure of 22.0 kPa has a volume of 33.0 cm3. The pressure is increased to 888 kPa, while the temperature remains constant. What v

A sample of gas under a pressure of 22.0 kPa has a volume of 33.0 cm3. The pressure is increased to 888 kPa, while the temperature remains constant. What volume will the gas occupy at this...
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02/19/15

#### The pressure exerted by a gas is 38.0 atm while it has a volume of 350 cm3. What would be the volume of this sample of gas at standard atmospheric pressure?

The pressure exerted by a gas is 38.0 atm while it has a volume of 350 cm3. What would be the volume of this sample of gas at standard atmospheric pressure?
must show units, and must be rounded...
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02/19/15

#### The pressure exerted by a gas is 45.0 atm while it has a volume of 475350 cm3. What would be the volume of this sample of gas at standard atmospheric pressure?

The pressure exerted by a gas is 45.0 atm while it has a volume of 475350 cm3. What would be the volume of this sample of gas at standard atmospheric pressure?
must show units, and must be...
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02/18/15

#### The pressure exerted by a gas is 2.5 atm while it has a volume of 150 cm3. What would be the volume of this sample of gas at standard atmospheric pressure?

answers must show units, and must be rounded to the correct number of significant digits. Pressure for STP in atmospheric units (atm) is 1.0, STP for kilopascals (kPa) is 101.3 kPa
The pressure...
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12/05/14

#### Mass of NaOH needed to make 500mL of 0.1M NaOH solution?

I'm working on a solutions lab and would like someone to look over my calculations please.
The question asked:
"What mass of solid NaOH is needed to make 500mL of 0.1M NaOH solution?"
My...
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