J.R. S.

Chemistry

02/19/19

Chemistry stoichiometry

Calculate the theoretical mass of calcium carbonate using the sodium carbonate as starting material with 1.3 grams

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Chemistry General Chemistry

02/19/19

Homework problem

Aluminum has a density of 2.71 g/mL. Calculate the VOLUME occupied by 0.52 grams of aluminum foil.

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Chemistry

02/18/19

density question

platinum has a density of 21.45 g mL-1 gold has a density of 19.28 g ml-1 which is larger a 100.0 gram cube of platunum or a 100.0 gram cube of gold? explain

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Chemistry

02/18/19

Are you able to convert 1 mCi to grams?

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Chemistry

02/18/19

CHEM Ch.10 need help with the steps

An ideal gas in a sealed container has an initial volume of 2.65 L. At constant pressure, it is cooled to 23.00 °C where its final volume is 1.75 L. What was the initial temperature?

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Biology

02/18/19

what is the difference in pH units between the two solutions? explain.

If solution A has 10,000 times as many H+ ions as solution B, what is the difference in pH units between the two solutions? Explain.

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Biology

02/18/19

Deionized water can have a pH of 7 and considered neutral. If an acid (i.e. HCl) is added the pH quickly decreases. If a base is added the pH quickly increases. Is this a buffer system? Why or why... more

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Chemistry

02/18/19

a routine test of a local lake determined the concentration of the lead in the lake was 3.32 * 10-7 m. is the water in the lake below or above the allowed limit?

Local rivers and lakes are tested regularly for toxins. one of the toxins great concern is lead. the maximum amount of lead allowed in in water to be considered safe is 15ppb. a routine test of a... more

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Chemistry

02/18/19

What will be the mass of a 3 L sample of oxygen gas at STP?

Just looking for some help on this

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Math

02/18/19

The sum of two numbers is 60 and their quotient is 4. What are the two numbers?

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Chemi Org

02/18/19

Stoichiometric calculation

9.7 g H2 x 1 mol H_2 x _____=55g g NH3. ———- 2.0g H_2N2 + 3H2 arrow 2NH3

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Algebra 2

02/18/19

i need an answer PLEASE

A scientist has saline solutions with concentrations 3% and 15%. He wants to mix some of each solution to get 72 milliliters of solution with a 6% concentration. How many milliliters of each... more

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Answers •1

Chemistry

02/18/19

Determine the amount of energy in a marshmallow that was burned to increase the temperature of 50.00 g of water from 23C to 25C, in Joules and kilocalories

Need help ASAP on this pre-lab

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Chemistry

02/18/19

The burning of 0.37 g potato chips cause the temperature of 58.18 g of water in a soda can calorimeter to increase from 21.5C to 28.1C. Calculate the amount of heat absorbed by the water in Joules.

Need help ASAP on Chemistry work need for a pre-lab.

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Chemistry

02/18/19

Write the balanced NET ionic equation for the reaction when FeSO₄ and Ba(OH)₂ are mixed in aqueous solution. If no reaction occurs, write only NR.

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Chemistry

02/18/19

Write the balanced NET ionic equation for the reaction when Al(NO₃)₃ and Na₃PO₄ are mixed in aqueous solution. If no reaction occurs, write only NR.

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Chemistry Biochemistry Organic Chemistry

02/17/19

What type of reactions can CH3-CH2-O-CH=O undergo?

What type of reactions can CH3-CH2-O-CH=O undergo?Ive been stuck on this question for a few days now, I would really appreciate some help!

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Science Biology Chemistry

02/17/19

how do i deduce the moles of the acid reacted with sodium carbonate

The balanced equation is: Na2CO3 + 2HCl ----> 2NaCl + H2O + CO2Moles of sodium carbonate: 0.03945average volume of acid added: 26.3 cm3Acid = HClThis is standardisation of an acid (titration 1)

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Vmath

02/17/19

How many liters of a 60% acid solution must be mixed with a 20% acid solution to get 400 L of a 50% acid solution?

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Math

02/17/19

solve the following problem using a proportion

Jim needs to mix a medication with water to make the appropriate solution. the medication says to mix 3 oz of medication with 5 cups of water.Jim has 23 ounces of medication.how much water will he... more

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Science

02/17/19

Science question

whats the answer to on a winter day the temperature drops -5 Celsius to -15 Celsius overnite if a pan sitting outside contains 0.40kg of ice how much heat is removed from the ice for this... more

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Chemistry Stoichiometry

02/16/19

I can't solve this. Please help

Industrially, nitric acid is produced by the Ostwald process, as represented by the following equations: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(l) 2NO(g) + O2(g) → 2NO2(g) 2NO2(g) +... more

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Chemistry Chem

02/16/19

In a constant-pressure calorimeter of negligible heat capacity, 25 mL of 1.00 M CaCl2 is mixed with 25 mL of 2.00 M KF, resulting in solid CaF2 precipitating out of the solution.

In a constant-pressure calorimeter of negligible heat capacity, 25 mL of 1.00 M CaCl2 is mixed with 25 mL of 2.00 M KF, resulting in solid CaF2 precipitating out of the solution. During this... more

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Chemistry Chem

02/16/19

A 5.000 g sample of a hydrocarbon (100.0 g/mol) is completely combusted in a bomb calorimeter with a heat capacity (excluding water) of 1500. J/°C.

A 5.000 g sample of a hydrocarbon (100.0 g/mol) is completely combusted in a bomb calorimeter with a heat capacity (excluding water) of 1500. J/°C. The calorimeter contains 2.500 kg of water (s =... more

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Chemistry Chem

02/16/19

When 1.0 g of snack cake is combusted in a constant-volume bomb calorimeter with a heat capacity (including its water) of 10.0 kJ/°C, the temperature of the calorimeter rises by 2.24°C.

When 1.0 g of snack cake is combusted in a constant-volume bomb calorimeter with a heat capacity (including its water) of 10.0 kJ/°C, the temperature of the calorimeter rises by 2.24°C. How many... more

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Answers •1

Chemistry stoichiometry

Homework problem

density question

Are you able to convert 1 mCi to grams?

CHEM Ch.10 need help with the steps

what is the difference in pH units between the two solutions? explain.

is this a buffer system?

a routine test of a local lake determined the concentration of the lead in the lake was 3.32 * 10-7 m. is the water in the lake below or above the allowed limit?

What will be the mass of a 3 L sample of oxygen gas at STP?

The sum of two numbers is 60 and their quotient is 4. What are the two numbers?

Stoichiometric calculation

i need an answer PLEASE

Determine the amount of energy in a marshmallow that was burned to increase the temperature of 50.00 g of water from 23C to 25C, in Joules and kilocalories

The burning of 0.37 g potato chips cause the temperature of 58.18 g of water in a soda can calorimeter to increase from 21.5C to 28.1C. Calculate the amount of heat absorbed by the water in Joules.

Write the balanced NET ionic equation for the reaction when FeSO₄ and Ba(OH)₂ are mixed in aqueous solution. If no reaction occurs, write only NR.

Write the balanced NET ionic equation for the reaction when Al(NO₃)₃ and Na₃PO₄ are mixed in aqueous solution. If no reaction occurs, write only NR.

What type of reactions can CH3-CH2-O-CH=O undergo?

how do i deduce the moles of the acid reacted with sodium carbonate

How many liters of a 60% acid solution must be mixed with a 20% acid solution to get 400 L of a 50% acid solution?

solve the following problem using a proportion

Science question

I can't solve this. Please help

In a constant-pressure calorimeter of negligible heat capacity, 25 mL of 1.00 M CaCl2 is mixed with 25 mL of 2.00 M KF, resulting in solid CaF2 precipitating out of the solution.

A 5.000 g sample of a hydrocarbon (100.0 g/mol) is completely combusted in a bomb calorimeter with a heat capacity (excluding water) of 1500. J/°C.

When 1.0 g of snack cake is combusted in a constant-volume bomb calorimeter with a heat capacity (including its water) of 10.0 kJ/°C, the temperature of the calorimeter rises by 2.24°C.

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J.R. S.

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Emmersion

Chemistry stoichiometry

Homework problem

density question

Are you able to convert 1 mCi to grams?

CHEM Ch.10 need help with the steps

what is the difference in pH units between the two solutions? explain.

is this a buffer system?

a routine test of a local lake determined the concentration of the lead in the lake was 3.32 * 10-7 m. is the water in the lake below or above the allowed limit?

What will be the mass of a 3 L sample of oxygen gas at STP?

The sum of two numbers is 60 and their quotient is 4. What are the two numbers?

Stoichiometric calculation

i need an answer PLEASE

Determine the amount of energy in a marshmallow that was burned to increase the temperature of 50.00 g of water from 23C to 25C, in Joules and kilocalories

The burning of 0.37 g potato chips cause the temperature of 58.18 g of water in a soda can calorimeter to increase from 21.5C to 28.1C. Calculate the amount of heat absorbed by the water in Joules.

Write the balanced NET ionic equation for the reaction when FeSO₄ and Ba(OH)₂ are mixed in aqueous solution. If no reaction occurs, write only NR.

Write the balanced NET ionic equation for the reaction when Al(NO₃)₃ and Na₃PO₄ are mixed in aqueous solution. If no reaction occurs, write only NR.

What type of reactions can CH3-CH2-O-CH=O undergo?

how do i deduce the moles of the acid reacted with sodium carbonate

How many liters of a 60​% acid solution must be mixed with a 20​% acid solution to get 400 L of a 50​% acid​ solution?

solve the following problem using a proportion

Science question

I can't solve this. Please help

In a constant-pressure calorimeter of negligible heat capacity, 25 mL of 1.00 M CaCl2 is mixed with 25 mL of 2.00 M KF, resulting in solid CaF2 precipitating out of the solution.

A 5.000 g sample of a hydrocarbon (100.0 g/mol) is completely combusted in a bomb calorimeter with a heat capacity (excluding water) of 1500. J/°C.

When 1.0 g of snack cake is combusted in a constant-volume bomb calorimeter with a heat capacity (including its water) of 10.0 kJ/°C, the temperature of the calorimeter rises by 2.24°C.

Still looking for help? Get the right answer, fast.

OR

J.R. S.

How many liters of a 60% acid solution must be mixed with a 20% acid solution to get 400 L of a 50% acid solution?