01/19/23

Calculate the pH of a 1.7 M solution of KCl.
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01/19/23

Calculate the pH of a solution of 0.80 M of KC7H5O2 (Ka for HC7H5O2 = 6.4×10-5).
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01/19/23

chemistry question
how much H2O will be produced if 25.4 g LiOH reacts with 64.8 g CO2? 
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01/18/23

For the reaction C + 2H2 → CH4, how many grams of carbon are required to produce 1.2 moles of methane, CH4 ?
For the reaction C + 2H2 → CH4, how many grams of carbon are required to produce 1.2 moles of methane, CH4 ?Round your answer to the nearest tenth. If you answer is a whole number like 4, report... more
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01/18/23

Which of the following is most likely an example of a basic research project?
I have tried to answer this question a few times but every time I come to a conclusion I start to think that another answer also applies to being considered "basic research"A. Modification of an... more
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01/17/23

How many Joules are required to increase the temperature of 13 g of alcohol from 11°C to 23°C?
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01/17/23

How many Joules are required to increase the temperature of 13 g of alcohol from 11°C to 23°C? The specific heat of alcohol is 2.47 J/g°C:
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01/17/23

A gas mixture contains 17.3% hydrogen and 82.7% argon by mass. What is the partial pressure of argon in the mixture if the total pressure is 987 mbar ?

Express the partial pressure in millibars to three significant figures.
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01/17/23

What volume of a 0.169 moL^ -1 Na3PO4 solution is necessary to completely react with 87.0 mL of 0.106 moL^−1 CuCl2?
Consider the following precipitation reaction: 2Na3PO4(aq)+3CuCl2(aq)→2Na3PO4(aq)+3CuCl2(aq)→ Cu3(PO4)2(s)+6NaCl(aq)
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01/17/23

What mass of phosphorus must react with 32.5 g of oxygen?

2P + 5O2 --> 2P2O5
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01/17/23

are all alkali metal oxides soluble in water?
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01/17/23

Empirical Chemical formula

I just wanted to double-check if this was right before I submitted it.Determine the empirical formula of a compound with the following composition: 54.52% C, 9.17% H and 36.31% O. If the molecular... more
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01/16/23

i A gas does not have a definite shape but does have a definite volume. ii) Gases are compressible. ill) A gas will not expand much when heated. iv) A gas can be poured.
i A gas does not have a definite shape but does have a definite volume. ii) Gases are compressible.ill) A gas will not expand much when heated. iv) A gas can be poured. Which one is true
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01/16/23

i A gas does not have a definite shape but does have a definite volume. ii) Gases are compressible. ill) A gas will not expand much when heated. iv) A gas can be poured.
i A gas does not have a definite shape but does have a definite volume. ii) Gases are compressible.ill) A gas will not expand much when heated. iv) A gas can be poured. Which one is true
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01/13/23

Help with the calculation
I have 300 mL of a 1.5 M KCl solution. If I heat the solution until the volume of the solution is 250 mL,Describe how you will prepare a 0.1 M 100.0 mL potassium chloride solution from solid... more
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01/13/23

Help with the answer
a string of magnesium, some copper turnings, and zinc granules. You would like to create a reactivity series that will list these metals in order of their chemical reactivity. Describe how you... more
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01/13/23

Molarity plz help me
1. How many moles in 4.2L of a 1.5M solution?2. How many grams of NaCl in 1.0L of a 3.5M solution of NaCl?3. What is volume of a 1.5M solution that contains 88g Na2CO3?4. What is molarity of 2.3L... more
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01/12/23

acid base chemistry

What quantity in moles of CH₃NH₃Cl need to be added to 200.0 mL of a 0.500 M solution of CH₃NH₂ (Kb for CH₃NH₂ is 4.4 × 10⁻⁴) to make a buffer with a pH of 11.45?
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01/12/23

Help with the computations
A hot air balloon with an internal pressure of 1.50 atm and a volume of 14.50 L at 20.00C is released. What volume will the balloon occupy at an altitude where the pressure is 0.600 atm and the... more
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01/12/23

What type or reaction mgbr2+cl2=mgcl2+br2

What kind of reaction is it
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01/12/23

Titration topics
Write your answers in the space provided.A burette was filled to the 0.00 mL mark with a standard 0.10 M KOH solution. This volume was recorded in the table of results. Then, 10.00 mL of... more
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01/11/23

Ba(NO3)2(aq) + Na2SO4(aq) → BaSO4(s) + 2NaNO3(aq). The experiment was begun with 75.00g of Ba(NO3)2 . Calculate the theoretical yield of NaNO3.

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01/10/23

acid concentration
An unknown amount of acid, H2A, was dissolved in pure water, so the volume of the solution became 100 ml, and the pH was 3.7, If the Ka of the acid is 1×10 -7, and the molar mass of the acid is 34... more
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01/09/23

What are the connections between Metabolism and Biochemistry?

I had a question where if I had to summarize the connections between metabolism (processes and in general) with biochemistry (Alkanes, alkyl halides, alcohols, etc etc), what would be some... more
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01/05/23

How can a dilute strong acid and a concentrated weak acid have the same pH
Acids
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