4,347 Answered Questions for the topic Science

Science Biology

10/21/20

What type of cell are bacteria
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10/21/20

URGENT HELP PHYSICS CART
In the physics lab, a cart of mass m1 = 0.30 kg moves with velocity v1 = 2.5 m/s on a frictionless track. It collides with another cart of mass m2 = 0.40 kg, which is initially stationary. The... more
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10/21/20

Oxidative Phosphorylation?
Can someone explain the following items in the context of oxidative phosphorylation, along with explaining the process? Mitochondrial matrix Intermembrane space Inner mitochondrial membrane NADH... more
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Science Research

10/19/20

How to eliminate lurking variables.
I'm conducting my first research study. I'm creating a form that applicants fill out online. I'm having a hard time figuring out how I can eliminate lurking variables.I read this article that said... more
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10/18/20

What are your strengths?
Has a teacher, parent or fellow student ever complpimented you on a strength or quality about yourself? Please share.
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Science Geography

10/17/20

why do we ignore climate change? why do people ignore the science behind it?
it’s a question that’s stuck in my brain for a while and i don’t know how to answer it.
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10/17/20

Percent Yield of Carbon Dioxide?
Liquid octane CH3CH26CH3 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2and gaseous water H2O. If 46.1g of carbon dioxide is produced from the reaction of 63.97g of octane... more
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10/17/20

percent yield of water
Aqueous hydrochloric acid HCl reacts with solid sodium hydroxide NaOH to produce aqueous sodium chloride NaCl and liquid water H2O. If 0.321g of water is produced from the reaction of 2.9g of... more
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10/17/20

temperature change
If the volume of  and NaOH were kept at 50 mL but the concentration was doubled to 2 M, the observed temperature change woulda. doubleb. halfc. be the samed. don't know
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10/17/20

Measured Temperature Change
If the volume of  and NaOH is doubled (100 mL) while keeping the concentration the same (1 M), the measured temperature change will beaDouble since more mols are reactingbSame since both qsol and... more
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10/17/20

What is the enthalpy change for this reaction?
When 50 mL of 1.00 M  was added to 50 mL of 1.00 M NaOH in a coffee-cup calorimeter, the temperature of the resulting solution increased by 4.5 . The enthalpy change for the neutralization isa.... more
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10/17/20

Find the DeltaH?
What is ΔHneut when 50.0 mL of 1.0 M HCl react with 40.0 mL of 1.0 M NaOH to produce a temperature change of +5.6 ? ​[math] d{soln} = 1.05 g/mL, c{sol} = 4.20 J/g. K
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Science Cell Theory

10/16/20

Are all living things made up of cells
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10/16/20

Physics, 5 questions

1. The force of a surface pushing back on an object is called the _____ force?a. gravityb. normalc. tensiond. friction2. the force of a rope, string, or similar object pulling on an object is... more
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10/16/20

Coffee-Cup calorimeter? Please check my answer! :)
When a neutralization reaction is carried out in a coffee-cup calorimeter, the temperature of the solution after reaction, Tf, would beaCannot determinebLowercThe... more
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10/16/20

Temperature reading.
You will be performing your experiment in a coffee-cup calorimeter and measure temperature changes upon reaction in the calorimeter. Given that ΔHneut = -56 kJ/mol, for a neutralization reaction of... more
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10/16/20

Temperature change? Check my answer please.
Predict how the temperature change that you measure for 25 mL of 1 M NaOH added to 25 mL of 1 M hydrochloric acid compare to the temperature change when 50 mL of 1 M NaOH is added to 50 mL of 1 M... more
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Science

10/16/20

A metal object has a mass of 1450 g and displaces 542 mL of water rumors. Calculate the density of this object.
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10/16/20

Predict the temperature change?
Predict how the temperature change that you measure for 25 mL of 2 M NaOH added to 25 mL of 2 M hydrochloric acid compare to the temperature change when 25 mL of 1 M NaOH is added to 25 mL of 1 M... more
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Science Chemistry

10/16/20

Isothermal Titration Calorimeter
Is it much like a coffee cup setup? Can it detect the heat absorbed or released from a chemical reaction? Can it be used to heat and melt metals? Can the instrument object a small volume of... more
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10/16/20

Which of the following reactions will lead to the largest temperature change in the calorimeter?
Which of the following reactions will lead to the largest temperature change in the calorimeter?a25 mL of 2 M NaOH added to 20 mL of 2 M HCIb50 mL of 1 M NaOH to 25 mL of 1 M HCIc25 mL of 2 M NaOH... more
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10/16/20

AP ENVIRO QUESTIONS PLS HELP!
You purchase a television at a substantial discount from a large chain store. Explain how the price would have changed if the store had priced the television at full cost. Describe three different... more
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10/15/20

AP Environmental Science Questions PLS HELP!
Explain why a hunter-gatherer lifestyle is unable to support efforts and activities of an industrial society. In your answer, you should consider factors such as nutritional requirements, resource... more
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Science Chemistry Physics

10/15/20

Help please!!!!
In August 2001, there were approximately 2 million people living in Apple City. In August 2011, that population grew to 6 million people. How many more people lived in Apple City in 2011 in... more
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Science

10/15/20

What is the relationship between Force and Acceleration
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