25,963 Answered Questions for the topic chemistry

03/16/23

Chemical reaction balancing problem
4.800 g of H2 was mixed and ignited with 36.40 g of O2. How much and which substances will be present in the reaction flask when the reaction is complete? Prove that the total mass of all the... more
Follows • 2
Expert Answers •1
Chemistry

03/16/23

Chemistry: Finding empirical formula
Question: A hydrocarbon undergoes complete combustion, with oxygen present, to produce CO2 and water. On collecting the two products it was found that 2.20 g of CO2 and 0.90 g of vapourised water... more
Follows • 2
Expert Answers •1
Chemistry

03/16/23

Chemistry: Finding empirical formula from moles
Question: Combustion of an alkane produces 3 moles of water and 2 moles of carbon dioxide. What is its empirical formula?Options: C2H3 CH2 CH3 CH (Ans: CH3)
Follows • 2
Expert Answers •1
Chemistry

03/16/23

Chemistry: Finding Molecular Formula when Volume is given
Question: Complete combustion analysis of a hydrocarbon compound was performed to define its molecular formula.On complete combustion, the hydrocarbon gave 20 cm^3 of CO2 and 60 cm^3 of water.The... more
Follows • 2
Expert Answers •1

03/16/23

Can anyone help on this chemistry problem, thank you!
A gas has a volume of 3.56 LL at 0 ∘C. What final temperature, in degrees Celsius, is needed to change the volume of the gas to each of the following, if n and P do not change?for 44.8 mLExpress... more
Follows • 1
Expert Answers •1

03/16/23

I need help on this chemistry problem, thank you!
A gas has a volume of 3.56 LL at 0 ∘C. What final temperature, in degrees Celsius, is needed to change the volume of the gas to each of the following, if n and P do not change?10.4 LExpress your... more
Follows • 2
Expert Answers •1

03/16/23

can someone help with this equation? thank you!
A gas has a volume of 3.56 LL at ∘C. What final temperature, in degrees Celsius, is needed to change the volume of the gas to each of the following, if n and P do not change?for 1270 mL?Express... more
Follows • 1
Expert Answers •1
Chemistry

03/16/23

If 23 grams of iron (ID chloride reacts with 41 grams of sodium phosphate, what is the limiting reagent? How much sodium chloride can be formed?
Follows • 1
Expert Answers •1
Chemistry

03/15/23

Chemistry please help.
A sample of compressed methane has a volume of 0.648 L at pressure of 503kPa at 75.0C. What pressure would it be compressed to in order to have a volume of 0. 216 L and a temperature of 50.0C?
Follows • 2
Expert Answers •1
Chemistry

03/15/23

Titration: Strong base and strong acid
Consider a titration of 0.0200 moles HCl (a strong acid) with NaOH (a strong base). At the equivalence point, the total volume of the solution is 78.9 mL. What is the pH of this solution at this... more
Follows • 3
Expert Answers •1
Chemistry

03/15/23

Chemistry 11 grade

A helium filed balloon has pressure of 101kPa and a temperature of 23C. It is placed in a freezer where the temperature is 0C. If the volume of the ballo0n remains constant, what is the new... more
Follows • 1
Expert Answers •1
Chemistry

03/15/23

Consider the titration of 30.0 mL of 0.251 M weak base B (Kb = 1.3 x 10⁻¹⁰) with 0.150 M HI. What would be the pH of the solution after the addition of 100.0 mL of HI?
Follows • 3
Expert Answers •1
Chemistry

03/15/23

Consider the titration of 30.0 mL of 0.251 M weak base B (Kb = 1.3 x 10⁻¹⁰) with 0.150 M HI. How many mL of the HI would be required to reach the halfway point?
Follows • 2
Expert Answers •1
Chemistry

03/15/23

Consider the titration of 30.0 mL of 0.251 M weak base B (Kb = 1.3 x 10⁻¹⁰) with 0.150 M HI. What is the pH of the solution before any acid has been added?
Follows • 2
Expert Answers •1
Chemistry

03/15/23

Consider the titration of 50.0 mL of 0.320 M weak base B (Kb = 7.5 x 10⁻⁶) with 0.340 M HNO₃. What is the pH of the solution after the addition of 90.0 mL of HNO₃?
Follows • 2
Expert Answers •1
Chemistry

03/15/23

Complete the balanced molecular reaction for the following weak base with a strong acid:
NACLO+H2S04
Follows • 2
Expert Answers •1
Chemistry

03/15/23

What quantity in moles of NaOH need to be added to 200.0 mL of a 0.200 M solution of HF to make a buffer with a pH of 3.90? (Ka for HF is 6.8 × 10⁻⁴)
Follows • 2
Expert Answers •1
Chemistry

03/15/23

Determine if the following salt is neutral, acidic or basic.

If acidic or basic, write the appropriate equilibrium equation for the acid or base that exists when the salt is dissolved in aqueous solution. If neutral, simply write only NR. Be sure to include... more
Follows • 2
Expert Answers •1
Chemistry

03/15/23

How many nutritional calories are there per gram of candy?
A researcher studying the nutritional value of a new candy place is a 4.2 g sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increases is... more
Follows • 2
Expert Answers •1

03/15/23

Identify the affect the equilibrium of the system on the following given situation.
Consider the reaction that has reached a state of equilibrium at 200oC:CO(g) + 3H2(g) ⇌ CH4(g) + H2O(g)   exothermic Determine whether each of the following will increase the equilibrium... more
Follows • 2
Expert Answers •1
Chemistry

03/15/23

Chemistry HW help
You decide to try to make a new kind of battery. After doing some research, you decide your two cells will be the NiO2 / Ni2+ and the H2MoO4/ MoO2 half-cells. This leads to the following... more
Follows • 2
Expert Answers •1
Chemistry

03/15/23

chemistry 11 grade
3.2 moles of carbon dioxide held inside in a 15 L container. How much gas at the same temperature and pressure could be held in a 4.0 L container? Avogadro's Equation needed.At what temperature... more
Follows • 1
Expert Answers •1
Chemistry

03/14/23

After performing the experiment, Calculate the percent yield of this reaction.
An excess of sodium carbonate, Na2CO3, in solution is added to a solution containing 17.85 g CaCl2. After performing the experiment, 12.23 g of calcium carbonate, CaCO3, is produced. Calculate the... more
Follows • 2
Expert Answers •1
Chemistry

03/14/23

How many total atoms are in .250 of co2
How many total atoms are there in 0.250mol of carbon dioxide (CO2)
Follows • 1
Expert Answers •1
Chemistry

03/14/23

Chemistry HW help
What is the overall oxidation number of BiO+ and H3BO3?
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.