01/22/21

chemistry (solubility)
Which of the following statements is true?Question 10 options: An acid-base titration is a procedure in which we measure the volume of acid or base of known concentration to neutralize a given... more
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01/22/21

Chemistry (solubility)
Why are most phosphates not soluble while most hydroxides are soluble?
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01/22/21

Solutions (chem)
Which of the following substances will dissociate/ionize 100%?Question 9 options: AgOH Be(OH)2 H3PO4 HBr
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01/22/21

How many grams are in 89.6 moles of oxygen gas O2?

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01/22/21

How many Liters O2will form from the decomposition of potassium chlorate (KClO3) if 6.4 x 1024 formula units KClO3 are used?
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01/22/21

How many grams of potassium chloride (KCl) will form if 9.0 grams of potassium chlorate (KClO3) decomposes?
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01/22/21

How come sugar crystals do not form in saturated soltuion?
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01/22/21

Percent by mass solution
Percent by mass solutionImagine you need to prepare 48.1 grams of a NaCl solution that is 0.72% by mass.  Question: Calculate the mass (in grams) of NaCl that is needed to make this solution.
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01/22/21

Balance Half Reactions: Oxidation and Reduction
1. Cu+2(aq) + K (s) ---> Cu (s) + K+(aq) It tells me to write the balanced half reactions for oxidation and reduction. Then balance the overall equation.Please help, it would be greatly... more
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01/22/21

Which is expected to have the lowest vapor pressure?
Which is expected to have the lowest vapor pressure?CH4SiH4NH3PH3H2O
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01/22/21

Kilocalories to heat 5.0 kg of water from 22°C to 28°C
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01/21/21

The Kp for the reaction A (g) ⇌ 2 B (g) is 0.0730. What is Kp for the reaction 4 B (g) ⇌ 2 A (g)?
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01/21/21

How long will it take for the concentration of A to decrease from 1.400 M to 0.383 for the zero order reaction A → Products? (k = 0.0345 M/s)
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01/21/21

The half-life for the zero order reaction A → Products is 276 s. What is the value of the rate constant for the reaction if the initial concentration of A is 0.817?
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01/21/21

If the equilibrium constant of a given reaction is 2.40, what is the equilibrium constant of its reverse reaction?
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01/21/21

Chemistry Stoichiometry

In the balanced chemical equation below, how many moles of water are created if 17.1 moles of acid react with excess magnesium hydroxide?H2CO3 + Mg(OH)2 —> MgCO3 + 2 H2O
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01/21/21

Titration Chemistry
4. A student performed three trials of a titration, each time using 20.00 mL samples of HCl(aq). The titrant was 0.20 M Ca(OH)2(aq). The average volume of titrant used was 16.34 mL. What is the... more
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01/21/21

3. Seawater is slightly basic (pH 8). A sample of seawater is diluted with pure water. What effect will this dilution have on the pH of the sample? Briefly explain your answer.
3. Seawater is slightly basic (pH 8). A sample of seawater is diluted with pure water. What effect will this dilution have on the pH of the sample? Briefly explain your answer.
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01/21/21

need help with chemistry
If 10.8 molecules of sodium nitrate react with excess iron(lll) chloride, how many moles of iron(lll) nitrite can theoretically be made?
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01/21/21

Please help with chemistry!
A synthesis reaction takes place when carbon monoxide (CO) and hydrogen gas (H2) react to form methanol (CH3OH). How many grams of methanol are produced when 14 grams of carbon monoxide reacts with... more
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01/21/21

54.5mL of a 7.25M stock solution of KMnO4 with enough water to make 750mL of a new solution. What is the new concentration of the solution?

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01/21/21

A student mixed 300g of MgSO4 in water to a final volume of 6.00L. What is the molar concentration of the solution?
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01/21/21

I’m really struggling on what to do for this problem
Copper is electroplated from molten copper (II) chloride. A constant current of 4.00 amp is applied by an external power supply. How long, in hours, will it take to deposit 100. g of Cu
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01/21/21

Could somebody tell me how i would go about solving this chemistry problem and what answer I should get?
(a) How many electron pairs surround an atom of boron (B, element 5) bonded in thecompound BCl3?(b) How many electron pairs surround an atom of nitrogen (N, element 7) in thecompound NF3?(c) Write... more
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01/21/21

Could somebody tell me how I would go about answering this chemistry problem and what answers I should get?
For each reaction listed, identify the proton donor or acid and the proton acceptor or base. Label eachConjugate acid-base pair.
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