01/20/24

Density problem

(A) Atoms are very small compared to objects on the macroscopic scale. The radius of a gold atom is 144 pm. What is this value in meters and in centimeters?(b) The mass of a single gold atom is... more
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01/19/24

Is Cu2+ in CuSO4 a competitive or non competitive inhibitor when it comes to inhibiting pectinase?
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01/19/24

Based on the thermodynamic properties provided for water, determine the amount of energy needed for 3.20 kg of water to go from -5.00 °C to 82.0 °C.

Based on the thermodynamic properties provided for water, determine the amount of energy needed for 3.20 kg of water to go from -5.00 °C to 82.0 °C. Properties: Property | Value | ... more
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01/18/24

The percent by mass of 1,6-hexandiol (MM = 118.17 g/mol) in an aqueous solution is 33.3%. What is the molality of the 1,6-hexandiol solution?
The percent by mass of 1,6-hexandiol (MM = 118.17 g/mol) in an aqueous solution is 33.3%. What is the molality of the 1,6-hexandiol solution
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01/18/24

Chemistry word problem

The typical dose of epinephrine at a particular concentration administered to a patient under cardiac arrest is 0.1 mg per kilogram of body weight. If a patient weighs 180 lb, how much epinephrine... more
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01/18/24

Chemistry math conversions.
The average density of human blood is 1060 kg/m3. What is the mass of blood in a person who has a blood volume of 0.00486 m3? Report your answer in units of kilograms and in units of... more
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01/17/24

Chemistry, find the mass, and put in scientific notation word problem.
The density of a certain type of plastic is 0.91 g/cm3. If a sheet of this plastic is 10.0 m long, 1.0 m wide, and 1 cm thick, what is its mass? mass = _____ X 10^_____gEnter your answer in... more
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01/17/24

Chemistry density word problem.

A slice of cheese has a mass of 38 g and a volume of 21 cm3. What is the density of the cheese in units of g/cm3 and g/mL?  ______g/cm3  ______g/mLPLEASE HELP
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01/17/24

Chemistry Significant Figures with addition and subtraction.
Express the answers to the following operations with the proper number of significant figures. (a) 87.5 + 1.3362 (b) 429 − 410.5 (c) 1.2364 − 1.07 (d) 1.5152 + 0.17 + 0.0003 
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01/16/24

How are free radicals generated?
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01/16/24

Limiting Reactant Problem
if 22.2 grams of NO and 13.8 grams of O2 are used to form NO2, how many moles of excess reactant wilk be left over? 2NO (g) + O2 (g) -> 2 NO2 (g)
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01/16/24

At 1.00 atm and 0 oc
At 1.00 atm and 0 °C, a 5.04 L mixture of methane (CH4) and propane (C3H8) was burned, producing 18.0 of CO2. What was the mole fraction of each gas in the mixture? Assume complete... more
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01/16/24

Use the van der waals
use the van der Waals equation of state to calculate the pressure of 3.30 mol of NH_3 at 499 K in a 5.90-L vessel?P=Use the ideal gas equation to calculate the pressure p under the same... more
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01/15/24

Calculate the pressure (in atmosphere) of IF5 after the reaction has gone to completion.
A 7.78 x 10-1 g sample or IBr and a 1.53 x 10-1 g sample of F2 react in a closed 9.90 L container at 495 K, according to the balanced chemical equation: IBr (g) + 4F2 (g) > IF5 (g) + BrF3... more
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01/14/24

How many gram of propane must be burned to supply the heat required to vaporize 6.75 L of water at 298 K?
The equation of combustion is given and so is the delta H at -2.22 kJ (assuming per mole). I'm confused on how to even start this problem, particularly with the vaporization aspect of water.
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01/08/24

chemistry (quickly please)

Write a balanced equation for the reaction of sulfuric acid(H2(SO4)) with gallium (Il) hydroxide to form water and gallium (lI) sulfate From the balanced equation, determine the mass of gallium... more
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01/06/24

Why doesn't OCH3 show -M effect? (O-R groups) Is presence of a lone pair mandatory for M effect?
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01/05/24

Lewis Dot Diagram
Given the Lewis Dot Diagram for CH2F2 answer the following:a) Only using the Lewis Dot Diagram can we tell if the C-H bond requires more energy to break (respond with either yes or no)?b) Only... more
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01/03/24

chemistry question
The compound diborane (B2H6) was at one time considered for use as a rocket fuel. Its combustion reaction is B2H6(g) + 3 O2(ℓ) → 2 HBO2(g) + 2 H2O(ℓ) The fact that HBO2, a reactive compound, was... more
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12/26/23

At STP, 50.0 mL of a gas weighs 0.301g and is found to be 47.4% sulfur and 52.6% chlorine. What is the molecular formula of the gas?

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12/23/23

Electrolysis of Cadmium: What mass of cadmium metal is produced when an electric current of 4.0 Amps passes through a dilute aqueous solution of cadmium chloride for 3.0 minutes?

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12/22/23

chemistry Stoich
85.00 g of calcium carbonate reacts with 45.00 g of iron(III) phosphate. What is mass, in grams, of iron(III) carbonate will form? please quick answer
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12/21/23

Based on the bond energies for the reaction below, what is the enthalpy of the reaction, in kJ? HC≡CH(g) + 5/2 O₂(g) → 2 CO₂(g) + H₂O(g)
H single bond H = 432 kjH single bond C = 411 kjH single bond N = 386 kjH single bond O = 459 kjC single bond C = 346 kjC single bond N = 305 kjC single bond O = 358 kjN single bond N = 167 kjN... more
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12/21/23

Chemistry Stoich
In the Haber process, 32.00 g of nitrogen gas is combined with 40.00 g of hydrogen gas to form ammonia gas, NH3. What mass, in grams, of ammonia will form? 
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12/19/23

A local radio station can be tuned in by dialing your radio to a frequency of 99 MHz. Calculate the wavelength (in meters) and (joules) (HINT: MHz means 1x106 Hz)
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