25,963 Answered Questions for the topic chemistry

Chemistry Organic Chemistry

05/09/23

Calculate the pH and concentrations of CH3NH2 and CH3NH3+
Calculate the pH and concentrations of CH3NH2 and CH3NH3+ in a 0.0447 M methylamine (CH3NH2)  solution. The 𝐾b of CH3NH2 is 4.47×10−4.pH=[CH3NH2]= M[CH3NH3+]=
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Chemistry Organic Chemistry

05/09/23

Calculate the 𝐾a for the acid
Enough of a monoprotic acid is dissolved in water to produce a 0.0114 M solution. The pH of the resulting solution is 2.66. Calculate the 𝐾a for the acid.𝐾a=
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Chemistry

05/08/23

When 46.0g of sodium hydroxide reacts with an excess of aluminum sulfate, how many grams of aluminum hydroxide are formed, according to the reaction below?
When 46.0g of sodium hydroxide reacts with an excess of aluminum sulfate, how many grams of aluminum hydroxide are formed, according to the reaction below? Al2(SO4)3(aq) + NaOH(aq) →... more
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Chemistry

05/08/23

Chemistry related

Which molecule is polar?(A) BF3(B) CO2(C) CF4 (D) H2Scould you explain which answer you got and why?
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Chemistry

05/08/23

Chemistry related

Which is the largest bond angle?(A) angle O-S-O in SO4 2-(B) angle CI-C-CI in HCCI3(C) angle F-Be-F in BeF2(D) angle H-O-H in H2OCould you explain which answer you got and explain why?
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Chemistry

05/08/23

Chemistry related

An sp hybridized central atom can be used to describe the bonding in(A) CH4(B) HCN(C) H2CO(D)OF2Could you explain which answer you got and explain why?
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Chemistry

05/08/23

Chemistry question
What is density of C2H6 if the pressure is 3.77 atm and the temperature is 442K?
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Chemistry

05/08/23

Wavelength and Frequency : General Chemistry
Visible light has wavelengths from 400 to 700 nm, whereas the wavelength region for gamma ray radiation is 1.0×10-16 to 1.0×10-11 m.We can say that:1. The frequency of visible light is _____ gamma... more
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Chemistry

05/08/23

What volume does 1.17 mol of N2 gas occupy at a temperature of 108°C and a pressure of 453 mm Hg?
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Chemistry

05/08/23

What mass of helium gas (in kg) is needed to pressurize a 60 L tank to 227 atm at 65°C?
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Chemistry

05/08/23

What is the temperature (in °C) if 22.1 g of N2 in a 1.1 L container has a pressure of 22.5 atm?
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Chemistry

05/08/23

Calculate the unknown quantity: P = ? mm Hg V = 1,673 mL n = 0.04 mol T = 318 K
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Chemistry

05/08/23

At what temperature (K) will a 3.32 g sample of neon gas exert a pressure of 398 torr in a 4.99 L container?
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Chemistry

05/07/23

For a particular redox reaction, Cr is oxidized to CrO4^2- and Cu^2+ is reduced to Cu+ . Complete and balance the equation for this reaction in basic solution. The phases are optional.
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Chemistry Math Algebra 1 Reading

05/06/23

can someone refer me a student because i am new here please anyone
can someone refer me a student because i am new here please anyone
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Chemistry

05/06/23

how many molecules of carbon dioxide would be formed from 2.5 x 10^24 molecules of O2
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Chemistry

05/06/23

A 25.0 mL solution of KOH is neutralized with 39.5 mL of 0.100 M HBr. What is the concentration of the original KOH solution?
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Chemistry

05/06/23

A 25.0 mL solution of HBr is neutralized with 22.3 mL of 0.105 M Sr(OH)₂. What is the concentration of the original HBr solution?
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Chemistry

05/06/23

A 15.0 mL solution of Sr(OH)₂ is neutralized with 50.9 mL of 0.350 M HCl. What is the concentration of the original Sr(OH)₂ solution?
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Chemistry

05/06/23

A 25.0 mL solution of HNO₃ is neutralized with 19.1 mL of 0.250 M Ba(OH)₂. What is the concentration of the original HNO₃ solution?
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Chemistry

05/06/23

A 15.0 mL solution of Ba(OH)₂ is neutralized with 22.4 mL of 0.200 M HCl. What is the concentration of the original Ba(OH)₂ solution?
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Chemistry

05/05/23

Chemistry 11 grade
How much heat, in joules is required to raise the temperature of 1.82 kg water by 3.32 C ?What is specific heat of iron, if it required 1050 J of heat energy rise the temperature of 220.0 g of iron... more
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Chemistry

05/05/23

How I set up my class online, I already found the tutor

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Chemistry

05/05/23

Does Hess' law always require canceling out all parts of equation to get the delta H of the reaction?
Does Hess' law always require canceling out all parts of equation to get the delta H of the reaction?What am I doing wrong on this Hess' Law problem?Question: What is the delta H of the reaction... more
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Chemistry

05/05/23

Acids and Bases Question 
 Explain what a conjugate acid is and what a conjugate base is.  What is the function of a buffer? What is a buffer made from?
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