447 Answered Questions for the topic chem

06/21/21

HELP ME, DUE NOW!
Use Lewis electron dot diagrams to illustrate the chemical bond in the following items. Identify if its ionic or covalentMagnesium Iodide (MgI)
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06/16/21

PLEASE HELP ME I AM DESPERATE PLEASE!!!!!!!
3 Cu  +   8HNO3  --> 3 Cu(NO3)2   +  2 NO  +  4  H2OIn the above equation how many moles of water can be made when 102.3 grams of HNO3 are consumed?Round your answer to the nearest tenth. If you... more
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06/16/21

Hi I have this one question. Please help me as soon as possible!!
2 NH3 + 3CuO g 3 Cu + N2 + 3 H2OIn the above equation how many moles of water can be made when 3 moles of NH3 are consumed ?please help
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06/15/21

4NH3 + 5O2 = 4NO + 6H2O How many moles of NO are produced if 6.96 grams of NH3 react with an excess amount of oxygen?

Grateful for any help! If you could explain the work that'd be helpful as well!
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06/15/21

4NH3 + 5O2 = 4NO + 6H2O How many grams of O2 are needed to completely react with 3.315 moles of NH3?

Grateful for any help given!
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06/15/21

4NH3 + 5O2 = 4NO + 6H2O If you made with 9.67 moles of H20, how many moles of NO were also produced?
Already balanced equation I keep getting this one wrong and I'm not sure if it's my setup or if I'm dividing something wrong. Grateful for any help given!
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06/12/21

My homework is so confusing. Can I get some help quickly?
S   + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2OIn the above equation how many grams of water can be made when 9 grams of HNO3 are consumed?Use the following molar masses. If you do not use these masses,... more
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06/12/21

Hello. I don’t have much time until my homework is due. Please help me asap!!
S   + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2OIn the above equation how many grams of water can be made when 9 grams of HNO3 are consumed?Use the following molar masses. If you do not use these masses,... more
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06/12/21

Hello. Please don’t bypass my question. My homework is due in 30 minutes and I need lots of assistance!
2 NH3 + 3 CuO g 3 Cu + N2 + 3 H2OIn the above equation how many grams of N2 can be made when 170 grams of CuO are consumed?Round your answer to the nearest tenth. If you answer is a whole number... more
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06/12/21

No one has helped me. Please help quickly!
3 Cu + 8HNO3 --> 3 Cu(NO3)2   + 2 NO + 4 H2OIn the above equation how many grams of water can be made when 6 grams of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is a... more
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06/12/21

my homework is due in a few hours and I am confused. Please... help... quickly!
Sodium chlorate decomposes into sodium chloride and oxygen gas as seen in the equation below.   ­­2NaClO3­ --> 2NaCl +3O2  How many grams of NaClO3­ were needed to produce 6 grams of O2? Round... more
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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?
Grateful for any help given!
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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?
Grateful for any help given!
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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?
Grateful for any help! :)
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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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