02/01/24

Chemistry question
What volume (mL) of 1.50 × 10-1 M hydrochloric acid can be neutralized with 105 mL of 0.500 M sodium hydroxide? Include the balanced equation with your work. 
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02/01/24

How do we know when do draw a coordinate bond? Like in (ON)- there is a coordinate bond formed after removing an e- from N
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02/01/24

Calculate the molality of solution, freezing point depression, and the freezing point of the solution.
Camphor has a particularly large freezing point depression constant of 40 C/m. Camphor's Kf value is over 2o times larger than water's Kf value. Camphor has a freezing point of 176 C.a. Calculate... more
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01/31/24

A student sets up the following equation to convert a measurement. (The ? stands for a number the student is going to calculate.) (0.070 N/cm) x ? = N/mm
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01/31/24

What is the frequency of green light that has a wavelength of 547 nm?
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01/30/24

Chemistry Conversions
knowing that a proton weighs 1 mass unit and a neutron weighs one mass unit. write the 4 conversion factors you can derive from these equalities. you know that a carbon atom contains 6 protond and... more
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01/30/24

Why does sulfur dichloride (SCl2) not follow the octet rule?
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01/30/24

At a constant volume
At constant volume, the heat of combustion of a particular compound, compound A, is - 3262k / m * ol When 1.029 g of compound A (molar mass = 115.09g / m * ol ) is burned in a bomb calorimeter, the... more
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01/30/24

A sample of an ideal gas in a

A sample of an ideal gas in a cylinder of volume 3.11 L. at 298 K and 2.44 atm expands to 8.68 L by two different pathways Path A is an isothermal, reversible expansion. Path B has two steps. In... more
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01/30/24

Automobile airbags
Automobile airbags contain solid sodium azide, NaN 3 , that reacts to produce nitrogen gas when heated, thus inflating the bag. 2 NaN 3 ( s ) ⟶ 2 Na ( s ) + 3 N 2 ( g ) Calculate the value of work,... more
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01/30/24

An ice cube with a mass
An ice cube with a mass of 54.8 g at 0.0 °C is added to a glass containing 445 g of water at 45.0 °C. Determine the final temperature of the system at equilibrium. The specific heat capacity of... more
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01/30/24

Consider an ionic compound
Consider an ionic compound, M*X_{2} composed of generic metal M and generic, gaseous halogen X.• The enthalpy of formation of M*X_{2}*is*Delta * H_{1} ^ 2 = - 997kJ / m * ol• The enthalpy of... more
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01/30/24

calculate the amount of H2 formed?
1.6 mol Zn and 7.6 mol HCl react according to the equation Zn + 2 HCl −→ ZnCl2 + H2 . If the limiting reactant is Zn, calculate the amount of ZnCl2 formed. Answer in units of mol.Calculate the... more
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01/30/24

Calculate the moles of O atoms in 0.603g of Ca(NO3)2. Round your answer to 3 significant figures.

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01/28/24

Reverse osmosis
In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. Assume seawater has a colligative molarity of 1.10 M, and you want to... more
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01/28/24

1H NMR Spectroscopy
How many unique 1H NMR signals exist in the spectrum of 2,4-dimethylhexane?
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01/28/24

A graduated cylinder contains 24.0 mL of water. What is the new water level after 38.2 g of silver metal with a density of 10.5 g/mL is submerged in the water?
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01/25/24

ionic bonding question

Confused with question: Calculate the force of attraction (in N) between a cation with a valence of +1 and an anion with a valence of -3, the centers of which are separated by a distance of 9.8... more
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01/25/24

What is the final temperature of a system?
What is the final temperature of a system if 10.00 g of gold at 90.0°C is placed in 10.00 g of water at 28.00°C? The molar heat capacity of gold is 25.41 J/(mol · °C) and the heat capacity of water... more
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01/25/24

Calculate the enthalpy change per mole of H2SO4 in the reaction.
A 103.2 mL sample of 1.00 M NaOH is mixed with 51.6 mL of 1.00 M H2SO4 in a large Styrofoam coffee cup; the cup is fitted with a lid through which passes a calibrated thermometer. The temperature... more
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01/25/24

Use this information and the additional information provided to calculate the ΔH°f of NaHCO3.
When 39.0 g NaHCO3 decomposes, the change in energy is-30.0 kJ. Use this information and the additional information provided to calculate the ΔH°f of NaHCO3.The Hf values are given belowH2O(l) =... more
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01/25/24

What is the temperature change of the skillet?
Exactly 18.4 mL of water at 31.0 °C is added to a hot iron skillet. All of the water is converted into steam at 100.0°C. The mass of the pan is 1.10 kg and the molar heat capacity of iron is 25.19... more
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01/20/24

Multiplication Error
My answer is 0.7142 but my professor says I am off by 1/2. I tried multiplying my answer by 1/2 but I was still wrong. How do I solve that?
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01/20/24

Is peroxide an ether?

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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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