82 Answered Questions for the topic Chemistry Measurement Word Problem

10/23/18

balanced combustion reaction for C6H6 Equation: 2C6H6(l)+15O2(g)--> 12CO2+6H2O(l)_6542 KJ
If 5.300 g of C6H6 is burned and the heat produced from the burning is added to 5691 g of water at 21 °C, what is the final temperature of the water?
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10/05/18

very tough chem question
What is the kinetic energy (in kJ mol-1) of a hypothetical gas with molecular weight 16.2 g mol-1 at a temperature of 48.7 °C? Do not try to identify the gas.
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09/14/18

can you help my solve this?
A vineyard has 145 acres of Chardonnay grapes. A particular soil supplement requires 5.50 g for every square meter of vineyard. How many kilograms of the soil supplement are required for the entire... more
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08/26/18

Chemistry Solution Math Problem - HELP!
A chemist needs 80 milliliters of a 50% solution but she only has 20% and 60% solutions available. Calculate how many milliliters of each should be mixed to get the desired result. How many... more
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08/11/18

what is the volume of a rock that has a mass of 6.4 grams and a density of 2g/ml?
 what is the answer to this problem. i need help to check my answers.
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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... more
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06/14/18

the factors influencing purity, eg during recrystallisation, filtration and drying of an organic compound.
I need help with this question
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04/03/18

Its a multiple choice I have C,D,F,G right now a classmate has C,D,E....help ? PLEASE RESPOND QUICKLY
A 35g piece of  copper is warmed 45 to 55 C and placed in beaker (A) containing 100ml of alchohol at 25C. A 3tg sample of liquid water is warmed from 45 to 55C and placed in a second beaker (b)... more
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04/02/18

How do you calculate rate of expansion of gas with temperature with a gradient of the line being 0.2?
i am doing a graph plotting in volume and temperature it has asked: How do you calculate rate of expansion of gas with temperature with a gradient of the line being 0.2? 
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04/01/18

What mass of simple sugar glucose is produced by the reaction of 1.5g of water?
Green plants use light from the Sun to drive photosynthesis. Photosynthesis is a chemical reaction in which water H2O and carbon dioxide CO2 chemically react to form the simple sugar glucose... more
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03/07/18

A substance contains 35.0 g nitrogen, 5.05 g hydrogen, and 60.0 g of oxygen. How many grams of nitrogen are there in a 150-g sample of this substance?
help! need help with this
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01/31/18

If an object has a mass of 8.75 pounds and a volume of .358 liters, what is the density of the object?
Second part of my post lab questions. 
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01/31/18

A solid piece of gold has a mas of 1.15 kg and a volume of 3.8 deciliters. What is the density of the object?
 Part of my post labs questions and it driving me nuts trying to answer.
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01/26/18

NEED HELP ASAP due tommorow been trying to figure this out all week its for science fair compotition
hello I have a project due tommorow and I need help with figuring out how much sulfuric acid I need to put into 2.5oz of water to lower it only 1 pH level and I need to find out the same to higher... more
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01/21/18

density and specific gravity
The density of a 4.0 cubic centimeter sample of a metal is 11.3 grams/cubic centimeter. What is the specific gravity of an 8.0 cubic centimeter sample of the same metal?
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01/17/18

The radius of a gold atom is 144 pm. How many gold atoms would have to be laid side by side to span a distance of 3.72 mm?
how do i solve it 
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01/04/18

mass, volume, and density
In this word problem the mass of Aluminum is 34.7 so how much is the volume (cm^3) and density ( g/cm^3)?
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12/13/17

Mass of a Solute
The mass of solute per 100 mL of solution is abbreviated as (m/v). Mass is not technically the same thing as weight, but the abbreviation (w/v) is also common. How many grams of sucrose are needed... more
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11/07/17

The volume of sodium hydroxide solution used
The volume of sodium hydroxide solution used was 760.0 ml, and the concentration was 0.300 m . calculate the moles of sulfuric acid that were neutralized (assuming that the reaction goes to... more
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10/28/17

I have found mols of HCl and I have found mols of the unknown Metal (M). What are my next steps?
I have found the mols of the HCl solution and I have found the mols of the unknown M. I divided by the mass to get 53.89g/mol. What I did next was find the mols of NaOH by using the formula... more
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10/08/17

Mole Fraction
A solution of Sodium Chloride in water has a vapor pressure of 26.8 torr at 30C. What is the mole fraction of NaCl in this solution? (Vapor Pressure of pure water is 31.824 torr at 30C)
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10/02/17

A 20.0 mL sample of glycerol has a mass of 25.2 grams. What is the mass of a 57-mL sample of glycerol?
A 20.0 mL sample of glycerol has a mass of 25.2 grams. What is the mass of a 57-mL sample of glycerol?     EXPLAIN PLEASE
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08/30/17

A bottle of liquid medication contains 300mL and costs $10.00. If the usual dose is 20mL, how much does each dose cost?
The topic goes on to a part b) stating if the usual dose is two tablespoons (1 tablespoon= 15 mL) how much does each dose cost?
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06/27/17

The dosage of a medication is 5mg/kg. How many mg would be needed for a 10lb cat? If the medication concentration is 2mg/ml, how many ml would be given?
this question is for unit conversions in introductor chemistry 
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05/17/17

i need some help working out this chemistry problem.
1. One cup of kidney beans contains 15 g of protein, 1.0 g of fat, and 42 g of carbohydrate. How many kilocalories, to two significant figures, does this sample contain?
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