4,349 Answered Questions for the topic Science

03/29/21

What is the rate equation given this data table?
A chemist does a reaction rate analysis on the following reaction:2NO (g) + O2 (g) → 2NO2 (g)She collects the following data:Trial Initial [NO] (M) Initial [O2] (M) Instantaneous Rxn Rate (M/s)1 ... more
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03/29/21

The statement below is fallacious. Indicate which fallacy the speaker has committed:
"Which is more likely--that the Yankees lose the first game of the series, or that they lose the first game and come back to win? I expect the Yankees to win the series, so I'll take the second... more
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Science Math Physics

03/29/21

A 50kg block is sliding on a frictionless surface at 4.0 m/s when it strikes a spring with a spring constant k of 1000 N/m.
A 50kg block is sliding on a frictionless surface at 4.0 m/s when it strikes a spring with a spring constant k of 1000 N/m.a. What will be the speed of the block when the spring is fully... more
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Science Math Physics

03/29/21

A 10kg object is falling through air. If the object was initially 5.0m off the ground, and hits the ground at a speed of 9.0 m/show much energy was dissipated due to air resistance?
A 10kg object is falling through air. If the object was initially 5.0m off the ground, and hits the ground at a speed of 9.0 m/show much energy was dissipated due to air resistance?
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03/29/21

Assign oxidation states to bromine
Assign oxidation states to bromine in the following compounds: HBr HOBr Br2 BrF3
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03/29/21

Determine the concentration of the acid
The flask contains 25mL of an unknown diprotic acid aqueous solution that reacts in a 1:2 stochiometric ratio with NaOH. Tritrate the solution with NaOH to determine the concentration of the acid.
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03/29/21

Determine unknown volume 
Calculate the volume of 6.93x10^-2 M calcium hydroxide required to neutralize 28.2 mL of a 0.147 M hydrochloride acid solution.
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03/29/21

Use Use primary standard to determine unknown concentration 
Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand... more
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03/29/21

physics question
A block of known mass M=1.5kg is at rest at the base of a ramp. A second identical block of mass M=1.5kg travels at a known, constant velocity v0 = 15.7m/s,. The block that travels at a... more
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Science Physics Physics B

03/28/21

What is the distance Δxa between the places where the intensity is zero due to the single slit effect? Give answer in mm to two significant figures.

Consider a double-slit with a distance between the slits of 0.04 mm and slit width of 0.01 mm. Suppose the screen is a distance of 1 m from the double-slit and light with a wavelength of 600 nm is... more
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Science Physics

03/28/21

If the spacing between the slits d is very large, what happens to the spacing between the zero intensity points?

Which of these makes sense? (only pick 1) It would become very small. It would depend on other details of the experimental setup. It would not change. It would become equal to the slit... more
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03/28/21

Use primary standard to determine unknown concentration

Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand... more
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Expert Answers •1

03/28/21

Determine unknown volume

Calculate the volume of 6.93x10^-2 M calcium hydroxide required to neutralize 28.2 mL of a 0.147 M hydrochloride acid solution.
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Science Chemistry

03/28/21

Can someone please check-over my answers to these questions? (My answer will be in bold)
*According to the VSEPR theory, a molecule or ion of SiCl2O will have a ___ shape.A. flat linearB. flat trigonalC. bentD. pyramidalE. None of the above*According to the VSEPR theory, a molecule or... more
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03/28/21

Chemical or physical change?
Why is the dissolving of aluminum nitrate in water considered both a physical and chemical process?
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Science Chemistry

03/28/21

What is a group of atoms that gains or loses electrons called?
A. a polar ionB. a non-polar ionC. a polyatomic ionD. a common ionE. None of the aboveFor this I got; C. a polyatomic ion. Is this correct?
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03/27/21

Stoichiometry work
10.0 grams of calcium is added to HCl. Ca   +  HCl →  CaCl2      +   H2How many grams of HCl would be needed to completely react with the Ca?
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Science Chemistry

03/26/21

Solubility Rule
Salts containing which of the following ions are generally soluble?a) Silverb) Carbonatec) Sulfided) Nitrate
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03/25/21

I need so much help with my chemistry homework very soon please por favor
1.) For the reaction C + 2H2 → CH4, how many grams of hydrogen are required to produce 1.6 moles of methane, CH4?Round your answer to the nearest tenth. If you answer is a whole number like 4,... more
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03/25/21

Hola I need much assistance with my homework please as soon as possible please

1.) 2 NH3 + 3 CuO → 3 Cu + N2 + 3 H2OIn the above equation, how many grams of N2 can be made when 11.8 moles of CuO are consumed?Round your answer to the nearest tenth. If you answer is a whole... more
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03/25/21

I need help please with my science homework please I have needed help for hours
1.) 2 NH3 + 3 CuO → 3 Cu + N2 + 3 H2OIn the above equation, how many grams of N2 can be made when 11.8 moles of CuO are consumed?Round your answer to the nearest tenth. If you answer is a whole... more
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03/25/21

Hello I am new to wyzant and I have desperately needed help with my chemistry homework. Please help me very quickly please

1.) 2 NH3 + 3 CuO → 3 Cu + N2 + 3 H2OIn the above equation, how many grams of N2 can be made when 11.8 moles of CuO are consumed?Round your answer to the nearest tenth. If you answer is a whole... more
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03/25/21

Hi please someone respond and help me with my chemistry please homework as soon as possible w
1.) 2 NH3 + 3 CuO → 3 Cu + N2 + 3 H2OIn the above equation, how many grams of N2 can be made when 11.8 moles of CuO are consumed?Round your answer to the nearest tenth. If you answer is a whole... more
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Science Physics Physics C

03/25/21

at what altitude above the earth’s surface must they be at?
If a person weighs 882 N on the surface of the earth, at what altitude above the earth’s surface must they be for their weight to drop to 800 N? Explain.
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03/25/21

Integral volume question; please help!
What is the volume of the solid formed by revolving the region bounded by the graphs of y=7, y=14-((x)^2/14)), and the y axis, about the y axis
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