02/26/23

How to solve the question in the description?
How many moles of nitrogen gas would be produced if 5.36 moles of copper(II) oxide were reacted with excess ammonia in the following chemical reaction? 2 NH₃(g) + 3 CuO (s) → 3 Cu(s) + N₂(g) + 3... more
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02/26/23

The percent mass of Calcium
What is the percent mass of calcium in a calcium supplement if 1.41-g of calcium carbonate is extracted from a 2.65-g pill?
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02/25/23

The solubility of calcium carbonate in pure water is 6.9 × 10−5 moles per liter. What is its molar solubility in a 0.16 M CaCl2 solution? Answer in mol/L
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02/25/23

Complete the electron configuration for Br

electron configuration: [Ar]
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02/25/23

Which ions are isoelectronic with Ar?
S2+Ca2+Cl−Na+
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02/25/23

How many electrons should we expect to see associated with the lowest energy peak in the photoelectron spectrum of the element Gallium ( Ga )?
# of electrons?
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02/25/23

Assuming equal concentrations, arrange these solutions by pH. (From Highest to lowest)
Assuming equal concentrations, arrange these solutions by pH. (From Highest to lowest)NaOH (aq)NH3 (aq)Ca(OH)2 (aq)HClO4 (aq)HF (aq)
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02/25/23

Osmotic pressure
A solution of 0.5grams of polypeptide is 1dm³ of aqueous solution has an osmotic pressure of 3.74torr at 27•c. What is the molar mass of the poly mass
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02/25/23

Determine the mass of 0.187 moles of tin (II) sulfate(SnSO4). [ Sn=118.7, S= 32.07, O =16 ]
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02/25/23

Calculate the percent nitrogen in ammonium hexacyano iron (II) which has the formula (NH4)4Fe(CN)6. [ N = 14.01, H = 1.008, Fe =55.85, C=12.01 ]
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02/25/23

4. Complete the following unit conversions. Be sure to show all work, express your answer in the appropriate number of significant figures, and include units.
4. Complete the following unit conversions. Be sure to show all work, express your answer in the appropriate number of significant figures, and include units.c. A beam of light has a wavelength of... more
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02/24/23

At a certain temperature, 0.920 mol SO3 is placed in a 4.50 L container. 2SO3(g)↽−−⇀2SO2(g)+O2(g) At equilibrium, 0.190 mol O2 is present. Calculate 𝐾c. 𝐾c=
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02/24/23

2NH3(g)↽−−⇀3H2(g)+N2(g) the equilibrium concentrations were found to be [NH3]=0.250 M, [H2]=0.520 M, and [N2]=0.750 M. What is the equilibrium constant for this reaction? 𝐾c=
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02/24/23

Write the equilibrium constant expression for the reaction A(s)+3B(l)↽−−⇀2C(aq)+D(aq) in terms of [A], [B], [C], and [D] as needed. 𝐾eq=

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02/24/23

The equilibrium constant for the chemical equation N2(g)+3H2(g)↽−−⇀2NH3(g) is 𝐾p=0.0501 at 211 ∘C. Calculate the value of 𝐾c for the reaction at 211 ∘C. 𝐾c=
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02/24/23

For each of the equations, determine the change in the number of moles of gas, Δ𝑛gas .
(NH4)2CO3(s)⟶2NH3(g)+CO2(g)+H2O(g)Δ𝑛gas=mol?H2(g)+Cl2(g)⟶2HCl(g)Δ𝑛gas=mol?2H2(g)+O2(g)⟶2H2O(l)Δ𝑛gas=mol?2Na(s)+Cl2(g)⟶2NaCl(s)Δ𝑛gas=mol?
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02/24/23

Sickle cell anemia is a genetic disorder in which the hemoglobin responsible for transporting oxygen is misformed. The disease begins with a mutation in a _______________ acid
Sickle cell anemia is a genetic disorder in which the hemoglobin responsible for transporting oxygen is misformed. The disease begins with a mutation in a _______________ acid, which results in a... more
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02/24/23

Calculate the [H2O2] after 10 minutes if [H2O2]0 is 0.200M.
The decomposition of H2O, to water and oxygen follows first-order kinetics with a rate constant of 0.0400 min-1.2H2O2(I) -> 2H2O(I)+ 02(g)Calculate the [H2O2] after 10 minutes if [H2O2]0 is 0.200M. more
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02/24/23

How many atoms of phosphorus are in 7.30 mol of copper(II) phosphate
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02/24/23

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The addition of nonvolatile solute results in a lowering ofthe vapor pressure of the solvent.If 7.02 g of a nonionic solute is dissolved in 82.30 g of benzene, C6H6, the freezing point is 2.70oC.... more
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02/24/23

Calculate the [H2O2] after 10 minutes if [H2O2]0 is 0.200M
Calculate the [H2O2] after 10 minutes if [H2O2]0 is 0.200M
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02/24/23

A student in chemistry has a 7.21 m solution that raised the boiling point of the solution by 1.25 degrees C. What is the molal boiling point constant (Kb) of the solution?
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02/24/23

A 1.2 g potato chip is burned under a test tube filled with 10. g water. The temperature rises from 25 ˚C to 65 ˚C. How many Calories are contained in that chip?

1000 calories = 1 Calorie q=mSH∆tSH water = 1cal/g˚C
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02/24/23

The daily dose of ampicillin for the treatment of an ear infection is 115.0mg/kg of body weight .what is the daily dose in mg for a 19.09kg child
The daily dose of ampicillin for the treatment of an ear infection is115.0mg/kg of body weight.what is the daily dose in mg for a 19.09 kg child
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02/24/23

2Cr + 2H3PO4 → 3H2 + 2CrPO4 How many grams of CrPO4 could be produced from 65 mL of 0.750 M H3PO4?

2Cr + 2H3PO4 → 3H2 + 2CrPO4 How many grams of CrPO4 could be produced from 65 mL of 0.750 M H3PO4?
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