11/20/21

A chemist conducts an experiment in which 2.00 L of hydrogen gas is collected over water at 1.00 atm and 298.15 K. Question
Using the combined gas law, calculate the volume in L of the dry hydrogen gas at 273.15 K and a pressure of 1.00 atm.
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11/20/21

A chemist conducts an experiment in which 2.00 L of hydrogen gas is collected over water at 1.00 atm and 298.15 K.
A chemist conducts an experiment in which 2.00 L of hydrogen gas is collected over water at 1.00 atm and 298.15 K. The phrase 'over water” means that the gas was collected by bubbling it into an... more
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11/20/21

A pure oxide of lead (Pb) contains 13.4% of oxygen. calculate the empirical formula
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11/20/21

Add 0.1 M NaOH in 5 mL increments until the pH is reading more than 7. how much did you add?
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11/20/21

Place 25 mL of 0.1 M HCL is a beaker and measure pH
I just need the pH of 25 mL of this solution
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11/20/21

1. What impact does solution volume have on pH? 2. What has a higher pH [H3O+], 0.1 M HCl or 0.01 M HCl?

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11/20/21

Determine the pH of 0.1 M NaOH
I need the calculations to figure out the pH of this solution
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11/20/21

a. Dilute 0.1 M HCl by a factor of 10 and measure pH b. Dilute 0.1 M acetic acid by a factor of 10 and measure pH
I need the calculations on how much to dilute this solution
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11/20/21

a. What is the pH of 0.1 M HCl (strong acid) using a pH meter b. What is the pH of 0.1 M Acetic acid (weak solution) using a pH meter
I just want to double check that I did my solutions correctly
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11/20/21

How many ml of concentrated HCL (36% HCL by mass, density= 1.18 g/my) are required to produce 10L of a solution that has a pH of 2.05?
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11/19/21

What is the balanced equation for aluminum fluoride decomposes?
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11/19/21

Write the Net ionic equation including phases that corresponds to the reaction

Fe(NO3)2(aq) + Na2CO3(aq) — FeCO3(s) + 2NaNO3(aq)
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11/19/21

Quest question on Kinetics

A chemical reaction is expressed by the balanced chemical equation A + 2 B −→ CConsider the data Initial Initial Initial [A] [B] rate M M M/min1 0.18 0.18 0.001428842 0.18 0.36 0.005715363 0.36... more
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11/19/21

getting mass chemistry
What mass of chlorophyll a, C55H72O5N4Mg (molar mass = 893.509 g/mol), would have the same number of oxygen atoms as that of 13.0 g of CO2 (molar mass = 44.009 g/mol)?Select one:a. 52.8 gb. 106 gc.... more
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11/19/21

Cehmistry Question
A 250.0-mL sample of 0.125 M Na3PO4 is mixed with 250.0 mL of 0.175 M Ca(NO3)2 to form Ca3(PO4)2. The net ionic equation for the reaction is given below:3 Ca2+(aq) + 2 PO43–(aq) ➜ Ca3(PO4)2(s)What... more
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11/19/21

Chemistry question Help
Met‎hanol, CH3OH (‎molar mass: 32.042 g/mol), reacts‎ with O2 and can be used‎ as fuel according to the reaction below (ΔHrxn = –764 kJ/mol CH3OH). What mass of O2 (molar mass: 31.998 g/mol) is... more
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11/19/21

Chemistry Question
Consi‎‎der the form‎‎ation of lithi‎‎um nitri‎‎de from lith‎‎ium and nitrogen: 6 Li + N2 ➜ 2 Li3NHow mu‎‎ch Li (molar m‎‎ass: 6.94 g/mol) is n‎‎eeded to pr‎‎oduce 2.00 k‎‎g Li3N (‎‎molar mass:... more
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11/18/21

Mac measured the density of silver three times and obtained the following results:
Trial 1: 10.6 g/cm3Trial 2: 10.8 g/cm3;Trial 3: 9.6 g/cm3Silver has a density of 10.5 g/cm3A. Calculate Mac's percent error for each trial.B. Which trial had the greatest percent error.
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11/18/21

What mass of Ba(OH)2 would handle the CO2 exhaled by the three astronauts during their eight-day mission? How does this mass compare to LiOH?
On spaceships, it is important to use lightweight, non-bulky materials. The engineers chose LiOH over Ba(OH)2. What mass of Ba(OH)2 would handle the CO2 exhaled by the three astronauts during their... more
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11/18/21

If each astronaut exhales 18.2 mol of CO2 every day and the mission is eight days, what mass of LiOH would exactly meet the requirement?
When the engineers were designing Apollo 13, they had to estimate the amount of CO2 that each astronaut would exhale. Unlike the Lunar Module, the Command and Space Module had enough LiOH to scrub... more
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11/18/21

How many days would the LiOH in the lunar module last for three men exhaling for four days, if they didn’t change the canister?

The Apollo 13 mission used lithium hydroxide to remove the exhaled CO2 from their atmosphere. The lunar module was equipped with enough LiOH for two astronauts during their two-day mission to the... more
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11/18/21

If 31 mL of 5.6 M H2SO4 was spilled, what is the minimum mass of NaHCO3 that must be added to the spill to neutralize the acid?
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11/18/21

Isopropyl alcohol is mixed with water to produce a 37.0% (v/v) alcohol solution. How many milliliters of each component are present in 695 mL of this solution? Assume that volumes are additive.
alcohol: _____ mLwater: ______ mL
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11/18/21

Why glucose is osmotically active and starch is not
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11/18/21

The melting and boiling point tests will MOST help them to infer the strength of intermolecular forces between ionic and covalent compounds? True or False
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