06/03/22

What types of substances accept protons in certain reactions?
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06/03/22

What types of substances accept protons in certain reactions?
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06/03/22

What types of substances donate protons in certain reactions?
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06/03/22

Compare the concentration [H+] of a solution with a pH of 2 to a solution with a pH of 4
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06/03/22

Determine the concentration [H+] of a substance with a pH of 12
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06/02/22

need help on two answers
The thermite reaction (shown below) is very important in welding projects and other important processes:Fe2O3(s) + 2 Al(s) =====> 2 Fe(l) + Al2O3(s)When the reaction is initiated with 21.5 g of... more
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06/01/22

A scale reads 380 N when a piece of nickel is hanging from it. What does it read (in N) when it is lowered so that the nickel is submerged in water?
A scale reads 380 N when a piece of nickel is hanging from it. What does it read (in N) when it is lowered so that the nickel is submerged in water?
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06/01/22

Can Somebody help me figure out this

Write the balanced chemical equation for the reaction between carbonic acid and ammonium hydroxide.Start by writing the proper names of the products below.Carbonic acid + Ammonium hydroxide → Next,... more
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06/01/22

Calculate the boiling point and freezing point of the solutions
1. 0.575 molal aqueous solution 2. 10 g of C6H12O6dissolved in 259 g water.3. 0.5 mole Br2 dissolved in 507 g chloroform
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06/01/22

Calculate ΔH for the reaction
Calculate ΔH for the reaction:2N2 (g) + 6H2O (g) → 3O2 (g) + 4NH3 (g) 
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05/31/22

Please help me understand
Can you explain or give an example of why the frequency of light does not change upon reflection
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05/31/22

Why did water become cold in a vacuum?
Water was placed into a container. The container was then vacuumed sealed and the temperature monitored. Why did the temperature of the water drop once the vacuum sealing took place?
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05/31/22

Spring constant

A spring have a constant of 340n/m . How much force is required to compress it 0.5 m?
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05/29/22

General Chemistry 2

The equilibrium constant, Kc, for the following reaction is 55.6 at 698 K.H2 (g) + I2 (g)  2 HI (g)Calculate the equilibrium concentrations of reactants and product when 0.366 moles... more
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05/29/22

General Chemistry 2
The equilibrium constant, Kc, for the following reaction is 1.20×10-2 at 500 K.PCl5(g) PCl3(g) + Cl2(g)Calculate the equilibrium concentrations of reactant and products when 0.388 moles... more
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05/27/22

Can someone please answer this
where not met in 200 iterations Given the following information for substance X:Specific Heat (c) of solid phase: 2.0 J/g°CHeat of Fusion (Lf): 100 J/gSpecific Heat (c) of liquid phase: 5.0... more
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05/04/22

Physic Question #3
By how much does a 66-kg mountain climber stretch her 0.596-cm diameter nylon rope when she hangs 30 m below a rock outcropping? (For nylon, Y=1.35 × 109Pa.) Round your answer to 4 decimal places
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04/29/22

A mixture of methane (CH₄) and butane (C₄H₁₀) at one atmosphere pressure and 25°C has a density of 1.695 g/L. Assuming ideal behavior, what is the mass in grams of carbon that are in 1 liter of mixtur
A mixture of methane (CH₄) and butane (C₄H₁₀) at one atmosphere pressure and 25°C has a density of 1.695 g/L. Assuming ideal behavior, what is the mass in grams of carbon that are in 1 liter of the... more
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04/15/22

Mechanical properties

The rapture strength of bone tissue is 100 MPa and Young’s modulus is 10 GPa. Calculatevalue of longitudinal strain bone at which the fracture of the bone occurs.
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04/10/22

The figure shows an electric dipole. What is the magnitude of the dipole's electric field at point P? Assume that q = 3.34 × 10-6 C, d = 3.10 × 10-6 m, and r = 3.12 cm.
The figure shows an electric dipole. What is the magnitude of the dipole's electric field at point P? Assume that q = 3.34 × 10-6 C, d = 3.10 × 10-6 m, and r = 3.12 cm.
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03/28/22

What is the molecular weight of the unknown compound?
When 2.25 grams of an unknown non-electrolyte dissolves in 12.0 grams of water, the solution freezes at -3.16 °C. What is the molecular weight of the unknown compound? Kf for water = 1.86 °C/m. 
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02/06/21

What is the formula mass of the polymer?
A 250 mL solution containing 25.4 g of polymer in toluene had an osmotic pressure of 0.155 atm at 28 degree Celsius. What is the formula mass of the polymer?
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