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?

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.

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...
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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...
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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.

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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06/14/18

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

I need help with this question

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)...
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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?

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...
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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

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.

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.

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...
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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?

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

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)?

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...
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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...
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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...
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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)

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

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?

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

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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