426 Answered Questions for the topic chem

Hello please help me I need help today with my chemistry homework and i am on the verge of tears please help me.

1.) S   + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2OIn the above equation how many moles of water can be made when 163.6 grams of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more

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1.) S   + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2OIn the above equation how many moles of water can be made when 163.6 grams of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more

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1.) S   + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2OIn the above equation how many moles of water can be made when 163.6 grams of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more

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S   + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2OIn the above equation how many moles of water can be made when 110.4 grams of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is a... more

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S   + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2OIn the above equation how many moles of water can be made when 110.4 grams of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is a... more

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1.) 2 NH3 + 3 CuO --> 3 Cu + N2 + 3 H2OIn the above equation how many moles of N2 can be made when 165.7 grams of CuO are consumed?Round your answer to the nearest tenth. If you answer is a... more

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1.) For the reaction C + 2H2 → CH4, how many moles of hydrogen are needed to make 153.2 grams 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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1.) 2 NH3 + 3 CuO --> 3 Cu + N2 + 3 H2OIn the above equation how many moles of N2 can be made when 157.4 grams of CuO are consumed?Round your answer to the nearest tenth. If you answer is a... more

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1.) S   + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2OIn the above equation how many moles of water can be made when 163.6 grams of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more

Hello so I am under a lot of stress and pressure. Please help me with my chemistry homework quickly please I am on the verge of crying

3 Cu + 8HNO3 --> 3 Cu(NO3)2   + 2 NO + 4 H2OIn the above equation how many moles of water can be made when 25 moles of HNO3 are consumed?Sodium chlorate decomposes into sodium chloride and... more
Chem Chemistry

05/25/21

How do you draw the isomer moulecule 3-ethyl-2,4,5-trimethyloctane

Draw the isomer below based on its name. (Hint, start by drawing the base hydrocarbon, octane, and then draw the ethyl and methyl groups off of the correct carbons.) It must be labeled with atoms... more
Chem Chemistry

05/24/21

An aqueous solution has a freezing point of -13.8 ∘C, what is the boiling point of the solution? The Kf value for water is 1.86 ∘C/m, and the Kb value for water is 0.520 ∘C/m.

An aqueous solution has a freezing point of -13.8 C, what is the boiling point of the solution? The Kf value for water is 1.86 C/m, and the Kb value for water is 0.520 C/m.

Chemistry Help needed!!

SHOW WORK. A 6.0ft person weighs 168lb. Express this person's height in meters and weight in kilograms.(1lb=453.g;1m=3.38ft.) solve using dimensional analysis

Consider the following reaction for the questions below: Ca + Br2 --> CaBr2

a. What type of reaction(s) is/are being represented by the chemical reaction above?b. Is this reaction an oxidation-reduction (redox) reaction?c. If this is a redox reaction, then identify the... more

ASAP: Please show all work : Use the data in the table below to calculate the value of the standard molar entropy S°, for B2 (g) at 25°C. 

(c) Use the data in the table below to calculate the value of the standard molar entropy S°, for B2 (g) at 25°C. Please show all workSubstance: Standard Molar Entropy, S° (J/Kmol)AB(g) 217.9AB2(g)... more

Which of the following can be determined about ∆So for the reaction?

A student conducts a reaction at 298 K in a rigid vessel and the reaction goes to completion. The temperature of the reaction vessel drops during the reaction. Which of the following can be... more

PLEASE HELP *Which of the following pairs of conditions are needed to construct a similar cell that generates the highest cell potential?

Fe2+(aq)+Zn(s)→Fe(s)+Zn2+(aq)E°cell=+0.32VA galvanic cell generates a cell potential of +0.32V when operated under standard conditions according to the reaction above. Which of the following pairs... more

05/12/21

Calculate the molarity (M) of 450. mL (4.50 x 10^2 mL) of NaBr solution prepared by dissolving 20.50g NaBr

A) 0.443 MB) 4.34 MC) 0.450 MD) 4.43 M

05/12/21

What is the volume of 0.2550 M HCI solution reqiured to completely neutralize 15.50 mL of 0.2110 M NaOH?

A) 12.83 mLB) 15.5 mLC) 18.73 mLD) 12.38 mL

05/12/21

Consider a 7% starch solution and a 2% starcg solution separated by a semipermiable membrane. Which process will occur?

A) water will flow from 2% into 7% starch solutionB) water will flow in both direction C) all of these will occurD) water will flow from 7% into 2% starch solution

05/12/21

A solution has OH- concentration as 1.0 x 10^-3. pH of this solution is:

A) 11B) 10C) -11D) 9

STOICHIOMETRY - what is the PERCENTAGE YIELD OF ASPIRIN?

Density of Acetic Acid = 1.082 g/mlMass of Salicylic Acid = 5.102 gVolume of Acetic anhydride = 10.00 mlMass of filter paper = 0.0654 gMass of watch glass = 8.677 gMass of filter paper, watchglass... more

What is the percentage yield of aspirin? (STOICHIOMETRY)

Density of Acetic Acid = 1.082 g/mlMass of Salicylic Acid = 5.102 gVolume of Acetic anhydride = 10.00 mlMass of filter paper = 0.0654 g Mass of watch glass = 8.677 gMass of filter paper,... more

list answer clearly

which of the following gives the relative size of Ka and pH of a 0.10 M solution of HEX3(aq)?HEX3(aq) + H2O(l) ⇌ H3O+(aq) + EX3−(aq)∆Go = +47 kJ/molrxnThe reaction between the acid HEX3(aq) and... more

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