01/12/21

I'm new to chemistry and I need help with this
A chemist starts with a 50.0 mL sample of 0.265 M propanoic acid, HC3H5O2, then adds 0.496 g of sodium propanoate, NaC3H5O2.1.Explain how this creates an effective buffer.2.Propanoic acid has an... more
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01/12/21

Acid based chemistry problems
A chemist has a solution of 0.010 M NaOH.1.Write the equation for the dissociation of sodium hydroxide in water.2.Calculate the pOH, the pH and concentration of hydrogen ions in the... more
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01/11/21

Ideal gas law combined gas law
A gas sample at 40.0C has a volume of 62.0 L when under a pressure of 0.82 atm. What is the new volume if the pressure is increased to 2.02 atm. and the temperature decreases to 10.0C? (Kelvin... more
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01/11/21

Chemistry Please Help!
Liquid nitroglycerine (C3H5(NO3)3) is a powerful explosive. When it detonates, it produces a gaseous mixture of nitrogen, water, carbon dioxide, and oxygen. a) What is the theoretical yield of... more
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01/11/21

Chemistry, PLEASE HELP ASAP! Acetylene gas, also known as ethyne, is used in welding and for many other industrial applications
Acetylene gas, also known as ethyne, is used in welding and for many other industrial applicationsa) if 13.7g of ethyne, C2H2 reacts with 18.5g O2 producing carbon dioxide and water vapor, what is... more
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01/11/21

Empirical Formula
A 1.56g sample of copper reacts with oxygen to form 1.95g of the metal oxide. What are the answers to step 1 (to 3 sig figs)?mol O =  mol Cu =  
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01/11/21

Find the empirical formula of a compound that contains 68.4% chromium and 31.6% oxygen.
Please help. I cried over this twice and I just don't understand. Thank you in advance.
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01/11/21

Rank each of the below molecules' melting point and boiling point from scale of 1 (lowest) to 7 (highest) and explain why:
Rank each of the below molecules' melting point and boiling point from scale of 1 (lowest) to 7 (highest) and explain why:a) HCIb) H2c) H2Od) NH3e) CCI4f) CO2e) HBr
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01/11/21

Electrolysis of Aqueous nickel fluoride
In an electrolytic cell containing a solution of Nickel (II) fluoride, what would be the anode and cathode reactions that take place? Here is what I came up with:Anode: The fluoride will get... more
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01/10/21

Hydrogen peroxide, H^2 O^2, decomposes at room temperature to release oxygen gas.
Use the law of definite proportions to explain why doubling the quantity of hydrogen peroxide doubles the quantity of oxygen produced.
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01/06/21

List all the geometric shapes that are present in butanamine and their relative angles
Basically molecular geometry
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12/13/20

How much liquid will be present?

The vapor pressure of ethanol, CH3CH2OH, at 30.0 C is 10.46 kPa . If 2.22g of ethanol is enclosed in a 2.00 L container, how much liquid will be present?
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11/19/20

A chemistry problem
The heating curve of substance X is shown below. The molar mass of substance X is 48.5 g/mol.Use the following data to calculate the total heat needed to increase the temperature of 20.0 g of... more
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11/19/20

i need help on this question

The figure is a 3-dimensional representation of an atomic orbital. Which orbital does it represent? three d-orbital a single p-orbital three p-orbitals an s-orbital
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11/18/20

is the atomic radius of germanium lager or smaller than bromine
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11/17/20

Which of the following is most likely to be a gas at room temperature? A) K₂S B) C₈H₁₈ C) MgF₂ D) F₂ E) H₂O
I am fairly certain its F2, but an explanation would be appreciated!!!
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11/15/20

TiCl2 Ionic or Covalent bond
Is TiCl2 ionic or covalent bond?One is metal and another is nonmetal, but the difference in EN value is 1.5 (less than 1.7).So what we need to look at in order to tell this is ionic or covalent?
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11/15/20

If a reaction causes 25.0 g of water to decrease temperature by 4.7 C at constant pressure, what is the change in enthalpy for the reaction? (The specific heat capacity of water is 4.184 J/g oC).
If a reaction causes 25.0 g of water to decrease temperature by 4.7 oC at constant pressure, what is the change in enthalpy for the reaction? (The specific heat capacity of water is 4.184 J/g oC).... more
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11/15/20

If a reaction causes 20.0 mL of water to increase temperature by 10.0 oC at constant pressure, what would be the change in temperature if 60.0 mL of water were used instead?

If a reaction causes 20.0 mL of water to increase temperature by 10.0 oC at constant pressure, what would be the change in temperature if 60.0 mL of water were used instead? Assume change in... more
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11/15/20

chemistry question
Complete the equation to show how pyridine, C5H5N , acts as a Brønsted-Lowry base in water.equation: C5H5N+H2O↽−−⇀
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11/15/20

chemistry question
Complete and balance the equations according to acid and base behavior in water. Phases are optional.HNO3(aq)−→−−H2O
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11/15/20

molecular equation
Barium reacts with hydrochloric acid in a similar fashion to magnesium. Write the balanced molecular equation for the reaction of barium with hydrochloric acid. Include phases.molecular equation
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11/14/20

What is the mass in grams of NO that can be formed from 6.56 moles of NO₂ in the reaction below? 3 NO₂ (g) + H₂O (g) → 2 HNO₃ (g) + NO (g)
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11/14/20

How many moles of nitrogen gas is produced if 3.16 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 H₂O(g)
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11/14/20

How many moles of ammonia would be required to react exactly with 0.342 moles of copper(II) oxide in the following chemical reaction? 2 NH₃(g) + 3 CuO(s) → 3 Cu(s) + N₂(g) + 3 H₂O(g)
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