Newest chemistry Questions | Wyzant Ask An Expert

01/20/24

In Alkylation, the order of rate of reaction is R-F>R-Cl>R-Br>R-I, why is it the opposite in Acylation?

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Chemistry

01/20/24

Specific Heat Question

Given 350.5 g of hot tea at 70.0 ∘C, what mass of ice at 0 ∘C must be added to obtain iced tea at 13.0 ∘C? The specific heat of the tea is 4.18 J/(g⋅∘C), and ΔHfusion for ice is +6.01 kJ/mol

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Chemistry

01/20/24

1.291 g sample contains only vitamin C and sucralose. What is the mass percent of Vitamin C and sucralose in the sample?

1.291 g sample contains only vitamin C and sucralose. When the sample is dissolved in water to a total volume of 44.4 ml, the osmotic pressure of the solution is 3.21 at 291 K. What is the mass... more

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Chemistry

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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Chemistry

01/19/24

what is b2 + 3w2 balanced

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Chemistry Biology

01/19/24

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

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Chemistry

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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Chemistry

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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Chemistry

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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Chemistry

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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Chemistry Math

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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Chemistry

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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Chemistry

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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Chemistry Math

01/17/24

A student sets up the following equation to convert a measurement.

(The ? stands for a number the student is going to calculate.)Fill in the missing part of this equation.Note: your answer should be in the form of one or more fractions multiplied together.(0.010... more

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Chemistry

01/17/24

Seeking a tutor

I am interested in your tutoring services for my 16 year old home school son. I purchased Chem c3000 for him to do some experiments as well that I would like for you to work with him on. Is this... more

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Chemistry

01/16/24

Chemistry Help Please

Which of the following descriptions and/or equations best represent the enthalpy change of a system? There may be more than one correct answer.

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Chemistry Organic Chemistry

01/16/24

When we have a resonating structure, and a non-resonating structure, which is more BASIC?

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Chemistry Organic Chemistry

01/16/24

How are free radicals generated?

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Chemistry

01/16/24

Why is HF a good oxidizing agent, while HI a good reducing agent?

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Chemistry

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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Chemistry

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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Chemistry

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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Chemistry

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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Chemistry

01/15/24

How many moles and grams of carbon are present in 12.78 g of ibuprofen, C13H18O2?

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Chemistry Science

01/15/24

How come original charges disappear when ionic chemical formulas are calculated? For example, Na+ and O2- become Na2O or Al3+ and Cl- become AlCl3

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Answers •1

In Alkylation, the order of rate of reaction is R-F>R-Cl>R-Br>R-I, why is it the opposite in Acylation?

Specific Heat Question

1.291 g sample contains only vitamin C and sucralose. What is the mass percent of Vitamin C and sucralose in the sample?

Density problem

what is b2 + 3w2 balanced

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

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.

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?

Chemistry word problem

Chemistry math conversions.

Chemistry, find the mass, and put in scientific notation word problem.

Chemistry density word problem.

Chemistry Significant Figures with addition and subtraction.

A student sets up the following equation to convert a measurement.

Seeking a tutor

Chemistry Help Please

When we have a resonating structure, and a non-resonating structure, which is more BASIC?

How are free radicals generated?

Why is HF a good oxidizing agent, while HI a good reducing agent?

Limiting Reactant Problem

At 1.00 atm and 0 oc

Use the van der waals

Calculate the pressure (in atmosphere) of IF5 after the reaction has gone to completion.

How many moles and grams of carbon are present in 12.78 g of ibuprofen, C13H18O2?

How come original charges disappear when ionic chemical formulas are calculated? For example, Na+ and O2- become Na2O or Al3+ and Cl- become AlCl3

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