J.R. S.

11/07/18

How many dollars are in one mole of pennies? How long with the money last (in years) if it was spent at a rate of $1 billion a second?

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11/06/18

Which of the following changes to your experiment would have resulted in the production of alarger volumeof CO2?

A None of the above would result in a larger volume of CO2 being collected. B Increase the temperature of the water in the Florence flask C Use a larger quantity of HCl in the Erlenmeyer flask. D... more

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Science

11/06/18

How does changing the frequency of a wave affect the amplitude of a wave?

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Answers •1

Chemistry

11/05/18

A pound of coffee beans yields 70 cups of coffee (4 cups = 1 qt). How many milliliters of coffee can be obtained from 1.0 g of coffee beans?

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Answers •1

Science

11/05/18

The molar extinction coefficient of (AMP) is 15,400 𝐿.𝑚𝑜𝑙−.𝑐𝑚 In found the absorbance of a sample of AMP to be 0.63. If length of the cuvette used was 10mm, calculate the concentration of AMP.

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Health

11/05/18

What are bad fats that cause heart disease?

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Answers •2

Chemistry

11/04/18

How many grams of sulfuric acid, H2SO4, are required to make 500 mL of a 0.10 M solution?

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Answers •1

Math Mathematics

11/04/18

How many miles are represented by 7 inches

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Home Work

11/04/18

40% of the total population of a city are men and 35% are women while the rest are children . if the children number is 18000 find the number of men and women in the city

give anser wiht solution

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Answers •1

Equilibrium

11/02/18

Equilibrium question

Consider the reaction N2O4 (g)---------2NO2 (g).(reversible). If 0.2 is the degree of disassociation , starting with 2.0 moles of N2O4 , the total number of moles at equilibrium would be?

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Physics

11/02/18

Find what heat in calories (cal) is required to change 60 g of 100∘C boiling water into steam. The heat of vaporization for water Lv is 540 cal/g.

Heat of vaporization : Q=mLv

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Physics

11/02/18

Find what heat in calories (cal) is needed to melt 48 g of 0∘C ice. The heat of fusion Lf for water is 80 cal/g.

Heat of fusion : Q=mLf

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Equilibrium

11/02/18

A vessel at 1000 K contains CO2 with a pressure of 0.5 atm. Some of the CO2 is converted into CO on the addition of graphite. If the total pressure at equilibrium is 0.8 atm, the value of Kp is?

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Equilibrium

11/02/18

Equilibrium question

Te disassociation equilibrium of a gas AB2 can be represented as: 2AB2(g)---------2AB(g) + B2(g) . The degree of disassociation is 'x' and is small compared to 1. The expression relating the degree... more

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Chemistry

11/01/18

Pre lab chemistry

What ions are present in a solution of sodium carbonate. Write the formulas for the ions and indicate the ratio they are present in

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Physics

11/01/18

Physics Plug and Chug

Q=cmΔT Use the formula to find how many joules it takes to raise the temperature of 0.28 kg of water from 20∘C to 34 ∘C. For the specific heat capacity c, use 4190 J/kg⋅∘C.

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Answers •2

Physics

11/01/18

Physics Think and Solve

Part AThe specific heat capacity of steel is 450 J/kg⋅∘C. Find the amount of heat that is needed to raise the temperature of a 14-kg piece of steel from 0 ∘C to 80 ∘C.Part BHow does this compare... more

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Chemistry

11/01/18

I have an issues with problems with conversions from atm to Nm-2 or cm3 to m3. I am sure my method is right it's just that the conversion are giving me a hard time is there any way u can help me?

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Answers •1

Chemistry

11/01/18

What is the molecular formula?

Chemical analysis of a gaseous compound showed that itcontained 33.0 percent silicon (Si) and 67.0 percent fluorine (F)by mass.At 35° C, 0.210 L of the compound exerted a pressure of 1.70atm.If the... more

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Science Biology Chemistry

11/01/18

Why are enzymes sometimes considered the "lock and key" model?

Why are enzymes sometimes considered the "lock and key" model? Please provide me an easy definition because I have to remember this for a test.

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Science Chemistry

11/01/18

What are some factors that can affect how well enzymes work?

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Chemistry

10/31/18

A metal carbonate containing an unknown +2 metal ("MCO3") reacts with excess acid resulting in the loss of CO2....

A metal carbonate containing an unknown +2 metal ("MCO3") reacts with excess acid resulting in the loss of CO2. Analysis of the experimental data indicates that the mass % CO2in the unknown metal... more

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Chemistry

10/31/18

General Chemistry I

A valid Lewis structure of __________ cannot be drawn without the central atom violating the octet rule. PF5 PCl3 SO3 CCl4 CO2

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Math Finance

10/31/18

My friend earned $360 on an investment of $642. How much would $749 would have earned in the same invedtment?

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Answers •1

Chemistry

10/29/18

Chemistry 101 HW

Part AWhat mass of silver chloride can be produced from 1.88 L of a 0.284 M solution of silver nitrate?Part BThe reaction described in Part A required 3.68 L of calcium chloride. What is the... more

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How many dollars are in one mole of pennies? How long with the money last (in years) if it was spent at a rate of $1 billion a second?

Which of the following changes to your experiment would have resulted in the production of alarger volumeof CO2?

How does changing the frequency of a wave affect the amplitude of a wave?

A pound of coffee beans yields 70 cups of coffee (4 cups = 1 qt). How many milliliters of coffee can be obtained from 1.0 g of coffee beans?

The molar extinction coefficient of (AMP) is 15,400 𝐿.𝑚𝑜𝑙−.𝑐𝑚 In found the absorbance of a sample of AMP to be 0.63. If length of the cuvette used was 10mm, calculate the concentration of AMP.

What are bad fats that cause heart disease?

How many grams of sulfuric acid, H2SO4, are required to make 500 mL of a 0.10 M solution?

How many miles are represented by 7 inches

40% of the total population of a city are men and 35% are women while the rest are children . if the children number is 18000 find the number of men and women in the city

Equilibrium question

Find what heat in calories (cal) is required to change 60 g of 100∘C boiling water into steam. The heat of vaporization for water Lv is 540 cal/g.

Find what heat in calories (cal) is needed to melt 48 g of 0∘C ice. The heat of fusion Lf for water is 80 cal/g.

A vessel at 1000 K contains CO2 with a pressure of 0.5 atm. Some of the CO2 is converted into CO on the addition of graphite. If the total pressure at equilibrium is 0.8 atm, the value of Kp is?

Equilibrium question

Pre lab chemistry

Physics Plug and Chug

Physics Think and Solve

I have an issues with problems with conversions from atm to Nm-2 or cm3 to m3. I am sure my method is right it's just that the conversion are giving me a hard time is there any way u can help me?

What is the molecular formula?

Why are enzymes sometimes considered the "lock and key" model?

What are some factors that can affect how well enzymes work?

A metal carbonate containing an unknown +2 metal ("MCO3") reacts with excess acid resulting in the loss of CO2....

General Chemistry I

My friend earned $360 on an investment of $642. How much would $749 would have earned in the same invedtment?

Chemistry 101 HW

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