4,365 Answered Questions for the topic Science

Science Math Chemistry

01/28/22

Anayltical Chemistry: Molar Concentration
For this question I keep getting 0.1775 but that is marked incorrect. It says you need to go to 4 significant figures so maybe I am rounding wrong? Thanks for the help.Calculate the molar... more
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Science Math Chemistry

01/28/22

Analytical Chemistry: Calculate Weight Percent
For the problem below I keep getting 102 but the online homework is saying it is wrong. It says you need to go to 4 significant figures so I may be calculating it wrong. Thanks for the... more
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01/28/22

Pure iron can be produced by the reaction between magnetite (Fe3O4) and hydrogen. Fe3O4(s) + 4H2(g) 🡺 3Fe(s) + 4H2O(l)
If 100.0 g of both magnetite and hydrogen are initially present:a. Determine the limiting reagent. b. Calculate the theoretical yield of iron c. If only 32.0 g Fe obtained in the process, calculate... more
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Science Chemistry

01/28/22

Question below:
Consider the following reaction: 2Al(s) + 3H2SO4(aq) 🡺 3H2(g) + Al2(SO4)3(aq)If 3.0 mol of Al were used in the reaction, then _______mol of H2SO4 is needed to complete the reaction, and... more
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Science Math Reading

01/27/22

Need help with reading comprehension, math, and science in grades K-5?
I am certified to teach all the core subjects grades K-5. I have 8 years of experience in the classroom and two years experience teaching students virtually. My background is working in the mental... more
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Science Chemistry

01/27/22

How many oxygen molecules are produced when 89.5 g of mercury(II) oxide are allowed to decompose according to the following equation: 2HgO 2Hg + O2
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01/27/22

Ammonia is produced from a reaction as shown in the equation H2(g) + 3N2(g) 2NH3(g). The number of moles of hydrogen required to produce 12 moles of ammonia is
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01/27/22

how are moles solely related to atoms, molecules and particles of elements and compounds?
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Science

01/26/22

evaporation is the change of state from a gas to liquid
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Science Chemistry

01/26/22

How can I improve a procedure in a science lab?
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Science Physics

01/25/22

Physics 2. I'd really appreciate any help.
Three blocks move on a surface with μs = 0.6 and μk = 0.4 as shown below. Jennifer, anotherhonor chemistry student, applied 34 N of force to move the system of three blocks, but shefailed. Assume... more
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Science Chemistry

01/25/22

What is the iodine clock reaction system and what is the propose of doing experiments?
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Science Biology Chemistry

01/22/22

Who are the scientists we have been learning about during our schooling? Who is missing from this learning? What could change about our learning process in science?
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Science Chemistry

01/22/22

what are your thoughts after reading the following articles?
Interesting articles about the way we have been learning and teaching science.if you are interested read one or both articles and let me know what you think!Silence is Never Neutral; Neither is... more
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Science Chemistry Reading

01/21/22

what are your thoughts after reading the following articles?
Interesting articles about the way we have been learning and teaching science if you are interested read one or both articles and let us know what you think!Silence is Never Neutral; Neither is... more
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01/21/22

what are your thoughts after reading the following articles?
Interesting articles about the way we have been learning and teaching science.if you are interested read one or both articles and let me know what you think!Silence is Never Neutral; Neither is... more
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01/21/22

if I ended a reaction with 50 grams of so3, how many grams of s8 did I begin with
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Science Physiology

01/20/22

How much salt is needed to fill a pit that is 10m deep and 8m wide and 12m long?

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Science Earth Science

01/19/22

What are the uses of beachrocks?
What are the uses of beachrocks?
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01/19/22

Which part of the bone does the Calcium go to?
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01/19/22

Which part of the bone does the Calcium go to?
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01/18/22

help me pls w this chemistry question
A gas occupies 24 L at 273 K and 1.0 atm. What is the volume if the conditions change to 388 K and 3.0 atm?
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Science Biology

01/17/22

Homeostasis Biology question
Explain how illness can upset the dynamic equilibrium of the body. Use a flowchart to show how feedback mechanisms help or hinder the body to recover from illness.
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Science Biology

01/16/22

Answer this question by using the word bank...
Water molecules stay close to each other as a result of existence of _______ bonds. Collectively, ______ bonds hold the substance together, this phenomenon is called _______. The clinging of one... more
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Science Physics Mechanics

01/16/22

What are the examples that prove that interaction between different bodies is due to the acceleration, not the motion itself.
What are the examples that prove that interaction between different bodies is due to the acceleration, not the motion itself.
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