07/12/19

chemistry that's eluding me
If a 3.6 moles of an ideal gas occupies 150 mL tank at a temperature of -5 °C, what is the pressure inside the tank?
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07/12/19

A 1.00 liter solution contains 0.44 moles hydrocyanic acid and 0.34 moles sodium cyanide .

If 0.17 moles of nitric acid are added to this system, indicate whether the following statements are true or false. (Assume that the volume does not change upon the addition of nitric... more
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07/12/19

How many protons does the isotope 1-129 have?
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07/12/19

Find the molar mass for dinitrogen monoxide
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07/12/19

Find the molar mass for ammonium sulfide
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07/12/19

Find the molar mass for NaC2H3O2
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07/12/19

Find the molar mass for BaCI2
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07/12/19

Find the molar mass for FeCrO4
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07/12/19

determine the amount of thermal energy
When 1.14 g of octane (molar mass = 114 g/mol) reacts with excess oxygen in a constant volume calorimeter, the temperature of the calorimeter increases by 10.0°C. The heat capacity of the... more
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07/11/19

Find the molar mass for each of the following:

FeCrO4 BaCI2 NaC2H3O2 Ammonium Sulfide Dinitrogen monoxide How many protons does the isotope 1-129 have? How many neutrons does the isotope 1-129 have? How many electrons does a Ba+2 ion have? ... more
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07/11/19

calculating mole fraction in a gas mixture
A 5.00L tank at 24.7°C is filled with 13.5g of boron trifluoride gas and 12.8g of carbon dioxide gas. You can assume both gases behave as ideal gases under these conditions.Calculate the mole... more
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07/11/19

Calculating Percent Yield Question
Aluminum oxide is produced in a single replacement reaction between aluminum and chromium (II) oxide. Calculate the percent yield if 603.0g of chromium(II) oxide were used with 422.5g of aluminum... more
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07/11/19

titration problem
A student weighs out 0.568 g of KHP (molar mass = 204 g/mol) and titrates to the equivalence point with 36.78 mL of a stock NaOH solution. What is the concentration of the stock NaOH solution? KHP... more
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07/11/19

Confused about the solubility of salts
How many of the following salts are expected to be insoluble in water? sodium sulfide - barium nitrate - ammonium sulfate - potassium phosphatea.1b.2c.3d.4e.nonei am confused why is the answer... more
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07/11/19

Can melting ice make noise?
Can ice make noise when its melting in a container? The container is filled up with ice and its melting is it possible for the ice cubes to shift or mobe from the very top and fall down or... more
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07/11/19

Drug dosage calculation

You have added 4 ml of albuterol solution (5mg/mL) and 12 ml of normal saline to your continuous nebulizer with an output of 8 ml/hr. What is the total dosage of the treatment you are giving? How... more
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07/11/19

Energy change chemistry

A He+ ion in the n = 2 energy state absorbs a photon with a wavelength of 109 nm.A. What is the energy change (in J) for the He+ ion undergoing the emission? (4)energy change (J): _______________B.... more
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07/11/19

Mass in Chemistry
What mass (in g) of ethanol, CH3CH2OH, contains 12.5 g of carbon?
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07/11/19

Chemical Bonds Chemistry
Which one of the chemical bonds listed below is the strongest? Which bond is the weakest?Explain your answers. (8)• the ionic bonding in NaCl EN Values• the ionic bonding in FeCl3... more
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07/10/19

How many grams of KClO3 are needed form 21.9g of O2
How many grams of  are needed to form  of KClO3 are needed to form 21.9g of O2
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07/10/19

How many calories are required to raise the temper ature of a 35.0 g sample of iron from 25 °C to 35 °C? Iron has a specific heat of 0.108 cal/g °C
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07/10/19

Is Calcium Oxalate a base or an acid?
Is Calcium Oxalate (CaC2O4) an acid or a base, specifically would it dissolve in an acid like HCl or a base like NaOH?
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07/10/19

Difference b/w prosthetic group of haemoglobin and cytochrome ?
Difference b/w hemoglobin prosthetic group and cytochrome prosthetic group ?
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07/09/19

how many grams of methane are in the container?
A 2.30 L container is filled with methane gas (CH4) at a pressure of 2600 mmHg and a temperature of 25 ∘C.
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07/09/19

What is the temperature in degrees celsius and in kelvins?
A 0.296 g sample of carbon dioxide, CO2, has a volume of 515 mL and a pressure of 415 mmHg . What is the temperature, in kelvins and degrees Celsius, of the gas?
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