12/18/21

How many milliliters of a 7.6 M NaOH solution are needed to prepare 0.915 L solution of NaOH with a concentration of 0.150 M?
Show your work, and include units throughout the solution
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12/18/21

0.300 mol of an ideal gas is initially at a volume of 2.00L. It expands against a constant external pressure of 120 kPa to reach the final volume o 2.30L.
0.300 mol of an ideal gas is initially at a volume of 2.00L. It expands against a constant external pressure of 120 kPa to reach the final volume o 2.30L. In the process it absorbs 24.3 J of heat.... more
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12/17/21

Write a complete balanced net ionic equation for the reaction of strontium nitrate with sodium chromate
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12/17/21

How many mL of .250 M NaOh would be needed to neutralize a 25 mL sample of the sulfuric acid prepared in part a?
A- Calculate the number of grams of sulfuric acid at the must be used to produce exactly 500 of a 0.345 M solution of sulfuric acid answer- 16.56 grams H2SO4
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12/17/21

Chemistry Molality Question
Exa‎ctly 8.20 g of nap‎hthalene (M‎W = 128‎.17 g/mol) is ‎dissolved in 2‎00 gram‎s of a c‎ertain nonpo‎lar Solv‎ent X. Giv‎en that the‎ boil‎ing ‎po‎int and fre‎ezing po‎int of the p‎ure so‎lvent... more
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12/16/21

Acid and Base Questions
1 Whic‎h of the follo‎wing will res‎ult to a brigh‎tly lit lig‎ht bul‎b wh‎en subject‎ed to the con‎ductivity test?a. Mixtu‎re of 10‎.0 mL 1.0 M‎ Mg(‎OH)2 and 1‎0.0 m‎L 1.0 M HN‎O3b. 1.0 M ci‎tric... more
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12/15/21

1. A solution contains 25.0 g of NaCl in 83.0 mL of solution. a) What is the %(w/v) concentration of the NaCl solution? b) What is the molarity of the NaCl solution?
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12/15/21

How many bonds does each carbon, oxygen, and hydrogen atom form in maltose?
I know carbon has 4 bonds, oxygen has 2 bonds and hydrogen has 1 bond, but that's why I'm confused. The chemical formula for maltose is C12H22O11, so if carbon has 4 bonds and there are 12 carbon... more
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12/15/21

Chemistry Solutions Question

Wh‎ich of the follo‎wing is t‎rue a‎bout colli‎gative prope‎rties?A. A 1:‎1 (v‎/v) etha‎nol-w‎ater mix‎ture is le‎ss vol‎atile t‎han pu‎re w‎ater alo‎ne.B. U‎pon gradu‎ally incre‎asing... more
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12/15/21

What is the relationship of an isotonic solution to an eye drop and dextrose saline solution?
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12/14/21

A certain combustion reaction generates 0.500 moles of carbon dioxide. How many grams does this represent? Report your answer to 3 significant figures. g
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12/14/21

What is the pressure in the bottle now? What will happen if it is opened?
You start out from Alaska, where it is -30 degrees C, and where there is exactly 1 ATM of atmospheric pressure, with an empty, 2 liter pop bottle that you have just tightly sealed in your trunk.... more
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12/14/21

Acid Base Question
Which of the following is true about the theories that govern acid and base?A. P‎Cl3 ca‎n be class‎ified as a Lewi‎s a‎cid.B. Wa‎ter can be clas‎sified as a Bron‎sted-Lo‎wry aci‎d.C. All... more
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12/14/21

Chem Question about Freezing Point
If oc‎ean wat‎er is co‎nsist of 3.5‎% (m‎/m) sa‎lt, i.‎e. assu‎ming Na‎Cl (MM ‎= 58.44 g), w‎hat wo‎uld be the fre‎ezing poi‎nt of an o‎cean? (Kf ‎H2O = 1.86°‎C m-1)A. 0.0‎00°CB. -1.1‎1°CC.... more
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12/13/21

what properties do glucose and other saccharides have that make them suitable for energy production?
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12/13/21

I need help with this problem
For the following reaction, 0.456 moles of carbon monoxide are mixed with 0.387 moles of oxygen gas.Carbon monoxide (g)+ oxygen (g) = Carbon dioxide (g)What is the formula for the limiting... more
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12/13/21

AP chemistry equations and reactions summary
For each of the following ionic solids, write a balanced overall equation to show their formation from their elements. Write two balanced half-reactions showing the oxidation and reduction process... more
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12/13/21

AP chem equations and reactions summary
What is the oxidation number of the underlined atom in each of the following species?a. CaI2b. GeO2c. K2Od. NH3
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12/13/21

AP chem equations and reactions summary
Calculate the concentrations of the ions indicated in each of the following solutions.a. [K^+1] in 0.238 M KNO3b. [Al^+3] and [SO4^-2] in 0.080 M Al2(SO4)3
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12/13/21

AP chem equations and reactions summary
Indicate if you would expect the following compounds to be electrolytes or non-electrolytes when in an aqueous solution. For each compound briefly explain your answer.a. sodium fluorideb. CH3OH... more
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12/13/21

Chem help please
Gold metal can be dissolved using sodium cyanide according to the reaction below:4 Au(s) + 8 NaCN (aq) + O2(g) + 2 H2O(l) → 4 NaAu(CN)2(aq) + 4 NaOH(aq)  If I added 86.7 g of Au to 750 mL of a 1.8... more
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12/13/21

PV=nRT equation, I think?
Calcium carbide (Ca2C) reacts violently with water to make calcium hydroxide and acetylene gas (C2H2) as shown below:Ca2C (s) + H2O (l) → Ca(OH)2(aq) + C2H2(g) If 14.8 L of acetylene gas is... more
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12/13/21

How many moles of NH₃ form when 32.4 L of H₂ gas completely reacts at STP according to the following reaction? Remember 1 mol of an ideal gas has a volume of 22.4 L at STP N₂(g) + 3 H₂(g) → 2 NH₃(g)
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12/12/21

Acid and bases/chemistry

What is the pH of a 0.023M solution of a weak acid with Ka= 4.9x10^-10
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12/12/21

Acid and bases/chemistry

A solution is prepared by dissolving 0.312g of the strong acid HCI (MM=36.458g/mol) in enough water to make 0.458L of solution. Calculate the pH of the solution to 4 decimal places.
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