4,349 Answered Questions for the topic Science

03/25/21

Help me please please someone as soon as possible please

1.) 3 Cu + 8HNO3 → 3 Cu(NO3)2  + 2 NO + 4 H2OIn the above equation, how many grams of water can be made when 4.3 moles of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more
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03/25/21

Please someone please just help me very quickly please look at my chemistry homework question

1.) 3 Cu + 8HNO3 → 3 Cu(NO3)2  + 2 NO + 4 H2OIn the above equation, how many grams of water can be made when 4.3 moles of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more
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03/25/21

Hello please help me with my chemistry please someone respond please
1.) 3 Cu + 8HNO3 → 3 Cu(NO3)2  + 2 NO + 4 H2OIn the above equation, how many grams of water can be made when 4.3 moles of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more
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03/25/21

Hola I need so much help with my chemistry homework please can someone actually help me as soon as possible please

1.) 3 Cu + 8HNO3 → 3 Cu(NO3)2  + 2 NO + 4 H2OIn the above equation, how many grams of water can be made when 4.3 moles of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more
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03/25/21

Hi um I am in desperate need of assistance with my chemistry homework as soon as possible please please thank you

1.) 3 Cu + 8HNO3 → 3 Cu(NO3)2  + 2 NO + 4 H2OIn the above equation, how many grams of water can be made when 4.3 moles of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more
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03/25/21

Hello I am need to wyzant and I have been stuck for many many long hours please actually help
1.) 3 Cu + 8HNO3 → 3 Cu(NO3)2  + 2 NO + 4 H2OIn the above equation, how many grams of water can be made when 4.3 moles of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more
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Science Physics

03/24/21

at what altitude above the earth’s surface must they be for their weight to drop to 800 N?

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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03/24/21

What is the density of sulfur dioxide gas at 90.0 kPa and 45°C?

(Answer: 2.18 g/L)Can someone explain how to do this problem please?
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Science Biology

03/24/21

Differentiate a dependent and an independent variable when doing an experiment.
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Science Chemistry

03/24/21

Calculate the pH of an aqueous solution of the salt NaA, which was made to a concentration of 0.080 M NaA. The Ka of the weak acid HA is 2.0 x 10-5.
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Science Chemistry

03/24/21

Which of the following salts when dissolved in water will yield a solution with a basic pH?
Na2CO3b. KHCO3c. NaFd. NH4Cle. NaHSO4
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03/24/21

ASAP please help algebra 1
Part A: Solve the equation to determine the solutions. Is it Ms. Jackson's document? If not, what are the correct solutions to the problem on this document? *you come across another document with... more
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Science Chemistry

03/24/21

Caculate the pH of a solution prepared by mixing 93 mL of a 0.25 M aqueous aniline solution (C6H5NH2, Kb = 4.3 x 10-10) with 100. mL of a 0.11 M aqueous nitric acid solution.
I got a pH of 4.68 when I solved it but my teacher got a pH of 9.30 and I'm confused of how she got 9.30.
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Science Physics

03/24/21

Two forces, of magnitudes F1 = 95.0 N and F2 = 40.0 N , act in opposite directions on a block, which sits atop a frictionless surface
Initially, the center of the block is at position  = -6.00  . At some later time, the block has moved to the right, and its center is at a new position,  = 6.00  .Find the work done on the block by... more
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Science Physics

03/24/21

You pick up a 3.4 kg can of paint from the ground and lift it to a height of 1.5 m .
A) How much work do you do on the can of paint?B)You hold the can stationary for half a minute, waiting for a friend on a ladder to take it. How much work do you do during this time?Express your... more
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Science Physics

03/24/21

A child in a tree house uses a rope attached to a basket to lift a 24 N dog upward through a distance of 5.0 m into the house.
How much work does the child do in lifting the dog?Express your answer to two significant figures and include the appropriate units.
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03/23/21

Summarize the events of contraction that lead up to sarcomere shortening including discussion of cross-bridge formation and the sliding filament model.
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03/23/21

Help with biology its urgent
Cystic fibrosis is a disease which is caused by a defective CFTR gene. This form of the gene is recessive. Let "N"=normal CFTR gene and "n" = abnormal CFTR gene. What is the genotype of individual... more
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Science Math Physics

03/23/21

Can anyone show how to solve this physics problem?
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03/22/21

PHYSICS HELP! Force of Gravitational Attraction
Determine the force of gravitational attraction between the earth ( which is 5.98 x 10^24 kg ) and a 70 kg physics student if the student is standing at sea level, a distance of 6.40 x 10^6 meters... more
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03/22/21

I need some help, I can't solve this physics problem.
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03/22/21

I need some help, I can't solve this physics problem.
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03/22/21

I need some help, I can't solve this physics problem.
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03/22/21

Describe the three sources of energy to produce ATP for muscles and distinguish between aerobic and anaerobic processes.
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03/21/21

Explain how muscle use leads to hypertrophy or atrophy through changes in muscle fiber mass
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