03/01/20

If 10 g of Ni reacts with 4 g of S, how many grams of NiS is produced?

Follows • 3
Expert Answers •2

03/01/20

A gas mixture contains 88 grams of oxygen gas (O2), 88 grams of nitrogen gas (N2), and 12 grams of nitrogen dioxide gas (NO2) What is the mole fraction of nitrogen dioxide in this mixture?
0.450.510.040.12
Follows • 2
Expert Answers •1

03/01/20

NaOH (aq) + HCI (aq) -> H2O + NaCI (aq) If 25.0 mL of a 0.2 M NaOH solution is used for the reaction shown above, how many moles of NaOH were involved in the reaction? ____ moles
Follows • 2
Expert Answers •2

02/29/20

Aluminum Chemistry Question
A piece of aluminum has a mass of 8.550 g, a length of 4.15 cm, and a width of 6.25 cm. Calculate the thickness in mm where the density of aluminum is 2.70 g/cm3. (volume of rectangle L x W x H)
Follows • 1
Expert Answers •1

02/29/20

Mass analysis of ascorbic acid
Ascorbic acid vitamin C contains 40.92% of carbon, 4.58% hydrogen ,and 54.50% oxygen by mass. Assume a 100-g sample of ascorbic acid. How many moles of carbon, hydrogen and oxygen are present in... more
Follows • 1
Expert Answers •1

02/28/20

Finding the Average Epsilon and Molarity of Unknown Solution
Stock Solution: 8.8×10-5 MSolution #1: 1.809×10-5 MSolution #2: 1.046×10-5 MYou measure the absorbance of each solution (at λmax = 524 nm) and obtain the following results: ... more
Follows • 2
Expert Answers •1

02/28/20

What are the most significant intermolecular forces that affect solubility?
Follows • 2
Expert Answers •1

02/28/20

Heat of Formation for One Mole
Find the heat of formation for a mole of carbon monoxide (CO) given: CO2(g) + C(s) → 2CO(g) ∆ Ho = 172.5 kJ C(s) + O2(g) → CO2(g) ∆ Ho = -393.5 kJ Use kJ and 3 significant figures for... more
Follows • 2
Expert Answers •1

02/28/20

covert the quantities
1.42×1027 P4O10 molecules to atoms..7.743×1020 formula units PbCl4 to atoms
Follows • 2
Expert Answers •1

02/28/20

A sample of trifluoroacetic acid, C2HF3O2, contains 32.5 g of carbon. Calculate the mass of the trifluoroacetic acid sample.
Follows • 2
Expert Answers •1

02/28/20

Stoichiometry Problems
The reaction between hydrazine (N2H4) and hydrogen peroxide (H2O2) to produce nitric acid (HNO3) and water, is used in some rocket engines. If 1.5 mol of hydrazine was used, find...a) # of moles of... more
Follows • 2
Expert Answers •1

02/28/20

What is the molarity of an acetic acid (CH3COOH) if 27.5 mL of 0.25 M NaOH are needed to neutralize 16.0 mL of the sample? M CH3COOH
Follows • 2
Expert Answers •1

02/28/20

How many milliliters of 4.7 M NaOH solution are needed to neutralize  8.9 mL  of  7.8 M   H2SO4  solution?
How many milliliters of 4.7 M NaOH solution are needed to neutralize 8.9 mL of 7.8 M H2SO4 solution? 
Follows • 2
Expert Answers •1

02/27/20

stoichiometry chem questin
How many moles of ZnClX2​ will be produced from 23.0 g23, point, 0, start text, space, g, end text of ZnZ, n, assuming CuClX2​ is available in excess?
Follows • 2
Expert Answers •2

02/27/20

In what amount of water (mol) there are as many hydrogen atoms as there are in 5,6 l of ammonia
Follows • 2
Expert Answers •2

02/27/20

How many l of NO2 we get after mixing 5 l NO and 2 l O2 stp
Follows • 2
Expert Answers •1

02/27/20

How pH of ammonia changes after increase of temperature and why?
What about other bases, acids?
Follows • 2
Expert Answers •1

02/27/20

Gas Laws: Stoichiometry
Potassium chlorate, when heated, decomposes to form potassium chloride and oxygen gas:___KClO3(s) ---> ___O2(g) + ___KCl(s)a.) Balance the equation.b.) How many grams of KClO3 are needed to... more
Follows • 2
Expert Answers •1

02/27/20

Chemistry of an airbag (Gas laws)
the balanced equation 2NaN3(s) = 2Na+3N2the air bag which contain 50.0g of NaN3 is about 60 LIf 50.0 g of NaN3 decompose how many moles of N2(g) will be produced? How many grams of N2(g) will be... more
Follows • 2
Expert Answers •1

02/27/20

Chemical composition

Determine the number of miles of molecules (or formula units) in each sample. a) 27.6 g sodium chloride b) 30.8 g nitrogen monoxide c) 3.95 kg carbon dioxide
Follows • 2
Expert Answers •1

02/26/20

Calculate the mass/volume percent (m/v) of 25.0 g g NaCl in 58.0 mL of solution.
Follows • 2
Expert Answers •1

02/26/20

Calculate the mass percent (m/m) of a solution prepared by dissolving 46.41 g g of NaCl in 168.8 g of .
Follows • 2
Expert Answers •1

02/26/20

270. mLof a 3.05 M NaNO3 solution
Calculate the grams of solute needed to prepare
Follows • 2
Expert Answers •2

02/26/20

270. mLof a 3.05 M NaNO3 solution
Calculate the grams of solute needed to prepare
Follows • 2
Expert Answers •2

02/26/20

3.40 L of a 0.130 M CaCl2 solution
Calculate the grams of solute needed to prepare
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.