411 Answered Questions for the topic chem

06/12/21

Hello. I need help immediately with my homework. I always receive help after my homework is due. Please respond as soon as possible

Question 1:For the reaction 2HNO3 + Mg(OH)2 → Mg(NO3) 2 + 2H2O, how many grams of magnesium nitrate are produced from 4 grams of nitric acid, HNO3 ?Round your answer to the nearest tenth. Do not... more
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06/12/21

Hello. My chemistry homework is due in 1 hour. I continue to get this question wrong time and time again. Please help me as soon as possible please!!
Question 1: 2 NH3 + 3 CuO g 3 Cu + N2 + 3 H2OIn the above equation how many grams of N2 can be made when 158 grams of CuO are consumed?Round your answer to the nearest tenth. If you answer is a... more
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06/11/21

Mass of CaCl2: 10,0 g Mass of Na2CO3: 10.0 g Actual amount collected: 2.00 g CaCO3 1. Write a balanced chemical equation.

A student performs a lab at school. They massed out both reactants and then mixed them together. The reaction produced a precipitate. They filtered out the product and took the mass of it. (I'm a... more
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06/10/21

H2SO4 + 2 NaOH = Na2SO4 + 2 H2O How many grams of Na2SO4 could be produced from 4.94 moles of sulfuric acid?
Grateful for any help given!
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06/10/21

C2H6 + 7O2 = 4 CO2 + 6 H2O If you wanted to produce 5.83 moles of carbon dioxide, how many moles of oxygen would you needed to have started with?
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06/10/21

2 C2H6 + 7O2 = 4 CO2 + 6 H2O If 0.31 moles of H 2 O were produced, how many moles of carbon dioxide would also have been produced?
Grateful for any help given!
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06/09/21

2 NABr + Ca(OH)2 = CaBr2 + 2 NaOH How many moles of CaB 2 are produced, if 14.72 moles of NaBr and excess Ca(OH) 2 react?
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06/09/21

2 NABr + Ca(OH)2 = CaBr2 + 2 NaOH What was the initial mass of calcium hydroxide for a reaction that produced 52.9 g of NaOH?
Grateful for any help given!
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Chem Chemistry

06/09/21

2 NABr + Ca(OH)2 = CaBr2 + 2 NaOH How many moles of NaBr are required to react with 187.34 g of calcium hydroxide?
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Chem Chemistry

06/07/21

Chemistry Unit 9 and 10
The pH of the ocean is 8.1. What is the concentration of hydroxide ions?
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06/04/21

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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06/04/21

I need to finish this in the next hour. Please someone help me with my chemistry homework as soon as possible please

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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06/04/21

Please I have waited two weeks to receive help. Please help me with my science homework. Plesse
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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06/03/21

Hello. Please help me it’s down to the wire and I need immediate help with chemistry homework as soon as possible please

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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06/03/21

Please you don’t understand what I mean when I say I need help please help me with chemistry please I am so desperate

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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06/03/21

Hello. It may not seem like it but I am under pressure and need so much help with my chemistry as soon as possible please please please ok please please please please

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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06/03/21

Please hear me out. I need help with my chemistry homework fast because my school is almost over and I don’t know what I can do. Please help me with my chemistry homework as soon as possible

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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06/03/21

Hi I need so much help before the school ends and I am crying I am so confused and stressed please help me with my chemistry homework

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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06/03/21

I need help please if you only you hear my voice youd know how incredibly desperate I am please help me with my Chemistry homework as soon as possible please

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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06/03/21

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
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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
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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.
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05/19/21

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
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05/19/21

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
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Chem Chemistry

05/17/21

How many grams of calcium fluoride are present in 107.0 g of a 26.0% calcium fluoride in water solution?
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