411 Answered Questions for the topic chem

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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

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

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
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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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

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

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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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

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