4,347 Answered Questions for the topic Science

02/16/22

Which of the following molecules has the lowest viscosity?
Which of the following molecules has the lowest viscosity?a. methanolb. glycerolc. methaned. water 2. The boiling point of methane (CH4) is much lower than that of hydrogen fluoride (HF)... more
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02/16/22

Surface tension of a fluid to sustain a certain gauge pressure within a bubble
What is the minimum surface tension of a fluid that can sustain a gauge pressure of 0.1 kPa in a 0.5 cm radius bubble?
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02/15/22

Describe the theory of continental drift and identify who first proposed this theory.
Describe the theory of continental drift and identify who first proposed this theory.
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02/15/22

How did scientists account for fossils and other geological evidence as they developed the geologic time scale?

How did scientists account for fossils and other geological evidence as they developed the geologic time scale?
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02/12/22

How do you balance these redox reactions by the half-reaction method?
How do you balance these redox reactions by the half-reaction method?Na + Hg2Cl2 → NaCl + Hg
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02/12/22

How do you balance these redox reactions by the half-reaction method?
How do you balance these redox reactions by the half-reaction method?Na + Hg2Cl2 → NaCl + Hg
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02/12/22

How do you balance these redox reactions by the half-reaction method?
How do you balance these redox reactions by the half-reaction method? 1. Al2O3 + C → Al + CO2 2. Na + Hg2Cl2 → NaCl + Hg
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02/12/22

How do I write balance equations for this redox reaction NaBr + Cl2 ===> NaCl + Br2 by the half reaction method?
How do I write balance equations for this redox reaction NaBr + Cl2 ===> NaCl + Br2 by the half reaction method?
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02/12/22

How do I write balance equations for this redox reactions Fe2O3 + CO ===> Fe + CO2 in acidic solution?
How do I write balance equations for this redox reactions Fe2O3 + CO ===> Fe + CO2 in acidic solution?
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Science Math Physics

02/11/22

You pull with a force of 235 N on a rope that is attached to a block of mass 28 kg, and the block slides across the floor at a constant speed of 1.7 m/s.
Q: You pull with a force of 235 N on a rope that is attached to a block of mass 28 kg, and the block slides across the floor at a constant speed of 1.7 m/s. The rope makes an angle of α= 46 degrees... more
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02/11/22

CHEMISTRYYY Helllppp!!!
Balance these redox reactions by the half-reaction methodSn2+ → Sn + Sn4+
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Science Elements Atoms Atoms

02/09/22

How many atoms are in 2.00 moles of Li?

just need some help, thank you in advance!
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Science Biology

02/09/22

Explain the mechanisms that would yield these results. Use the simulation to justify why using mitochondrial uncouplers, like DNP, would work as a diet pill.
DNP (2,4-dinitrophenol) is a banned diet pill. This substance belongs to a group of molecules called mitochondrial uncouplers. Aspirin is another mitochondrial uncoupler. Mitochondrial uncouplers... more
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Science Math Physics

02/07/22

Electric potential Physics Help Please!
The electric potential 1.0 m from a point charge  is 3.6×10^4 V . What is the value of q?I tried using this formula v=k q/r and plugged in 3.6x10^4 = (9x10^9) (q)/ 1.0) to solve for q but it was... more
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02/07/22

Physics Electric Potential Energy Please Help
A uniform electric field of magnitude 7.8×105  N/C points in the positive x direction. Find the change in electric potential energy of a 4.5 uC charge as it moves from the origin to the point... more
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02/07/22

When someone experiences an electric shock of both hands gripping a 230 v lamp, how is electricity moving through the person and what causes the shock to stop, the lamp to finally drop?

While in Italy I grabbed a metal hotel lamp by its base with two hands. When trying to move the lamp, my hands latched down and I was involuntarily walking across the room trying to drop the lamp,... more
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02/02/22

Aqueous sulfuric acid (H2SO4) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium sulfate (Na2SO4) and liquid water (H2O).
Suppose 18. g of sulfuric acid is mixed with 24.3 g of sodium hydroxide. Calculate the minimum mass of sulfuric acid that could be left over by the chemical reaction. Round your answer... more
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Science Biology Chemistry

01/31/22

Who is a group that is often not visible in portrayals of science. Or, a group or individual that have been impacted from scientific studies?
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Science Math Biology Physics

01/30/22

Step by step process of the problem.
A patient is to receive an intravenous injection of medication. In order to work properly, the pressure of fluid containing the medication must be 109 kPa at the injection point. If the fluid has a... more
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01/28/22

Define the meaning of the term ‘peptic ulcer disease’.
Define the meaning of the term ‘peptic ulcer disease’. Discuss some of the risk factors that make people susceptible (including factors that protect the mucosa of the stomach/duodenum and those... more
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Science Math Chemistry

01/28/22

Analytical Chemistry: Molar Concentration
For this question I keep getting 0.0091 and it keeps saying that is wrong. This question is asking for 4 significant figures so maybe I am rounding wrong. Thank you!Calculate the molar... more
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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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