4,347 Answered Questions for the topic Science

Science Math Physics

04/28/21

Help with a physics problem
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Science Physics

04/28/21

I could use any help you can give with this physics problem.
A uniform ladder 10.0 m long and weighing 60 N rests against a frictionless vertical wall as shown in the figure. If the ladder is just on the verge of slipping when it makes 50 degree angle with... more
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04/27/21

Some protists are more closely related to animals, plants, or fungi than they are to each other. What does this suggest about the classification used for members in this kingdom?
I’m a little stuck with this question... we learned about protists today, and i’m not sure how to answer this question.
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04/27/21

Newton's laws and forces
A 90 kg rocket man with a 50 kg jet pack is burning up his fuse up there alone. If the jet pack's thruster puts out 2 kilo-Newtons of force and is pointed 40 degrees below horizontal, what is the... more
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04/24/21

Anaerobic Respiration
Glucose partially breaks down into pyruvic acid during anaerobic respiration. This then proceeds to form Ethanol and Carbon Dioxide. My question is, what is the faith of the ethanol? Lactic acid in... more
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Science Chemistry

04/23/21

Nitrous oxide (N2O) reacted with oxygen gas to produce dinitrogen tetroxide (N2O4)...
Nitrous oxide (N2O) reacted with oxygen gas to produce dinitrogen tetroxide (N2O4). If the equilibrium concentrations of N2O, O2, and N2O4 are 0.089 M, 0.064 M, and 2.5M, respectively, what is the... more
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Science Chemistry

04/23/21

What is the value of Kc for the reaction 2A(g) + 3B(g) 2C(g) + D(g) ....
What is the value of Kc for the reaction 2A(g) + 3B(g) 2C(g) + D(g) if at equilibrium [A] = 0.60 M, [B] = 0.30 M, [C] = 0.10 M and [D] = 0.50 M?
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Science Chemistry

04/23/21

Given the following reaction and its equilibrium constant at a certain temperature...
Given the following reaction and its equilibrium constant at a certain temperature:N2(g) + 3H2(g) ↔ 2NH3(g)         Kc = 2.67Calculate the numerical value of the equilibrium constant for the... more
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04/22/21

Chest X-Ray Question

An RRT is reviewing the PA chest x-ray of 5'11, 280 lb male, who's present with pallor, tachycardia, and diffuse inspiratory crackles/mild wheezing. A working diagnosis of congestive heart failure... more
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04/22/21

Anatomy and Physiology Heart and Lung Question
Which of the following will cause the arterial pressure to decrease?A. VasodilatorsB. Cardiac failure C. Severe hypvpolemia D. All of the aboveI think it's all of the above, but I'm not 100% sure
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04/21/21

Respiratory System Pulmonary Function Testing Question
An RTT is giving a lecture to the ICU nurses on basic pulmonary function testing. Which of the following points need to made regarding restrictive lung disease?A. It is characterized by reduced... more
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04/21/21

Balanced equations
1. Write the balanced equation for the reaction of copper (I) oxide and Vinegar.2. Write the balanced equation for the reaction of copper (II) oxide and Vinegar.
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04/21/21

Can anyone help me? Please and thank you!
A sample of 0.8moles of gas was found to have a volume of 6,701mL and a temperature of 177K. What is the pressure of the sample in kPa?
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04/21/21

I need help before midnight, please!
A sample of 2.9moles of gas was found to have a pressure of 0.3atm and a temperature of -60oC. What is the volume of the sample in liters?
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04/21/21

Can anyone help me before midnight?
A sample of 9.9moles of gas was found to have a volume of 1.8L and a pressure of 57kPa. What is the temperature of the sample in kelvin?
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04/21/21

How many moles are in this gas sample? Please help if possible!
A sample of gas was found to have a volume of 16.4L, a pressure of 1.7atm, and a temperature of 176K. How many moles is the gas sample?
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04/21/21

need help before midnight, please!
A sample of 2.9moles of gas was found to have a volume of 2.7L and a temperature of 273K. What is the pressure of the sample in atmospheres?
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Science Math Biochemistry

04/21/21

please answer this chemistry problem

Calculate the mass of gaseous SO2 that will be produced along with 1233 g of copper from the roasting of copper(II) sulfide.CuS(s) + O2(g)  Cu(s) + SO2(g) 
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Science Math Chemistry

04/20/21

Reactants A and B are combined to form product C as shown by the equation below:
Reactants A and B are combined to form product C as shown by the equation below:2A(g) + B(g) ⟷3C(g)0.258 mol of A is combined with 0.163 mol of B in a 2.14 L rigid container at standard... more
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Science

04/20/21

Robert studies ocean life. He observes that a species of octopus squirts a large cloud of black ink whenever a predator approaches.

Which of the following is a scientific question that Robert could ask about what he observed?A. Does a predator like the taste of an octopus more than the taste of a squid?B. Does releasing a cloud... more
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04/20/21

How many copper atoms are in your 25.0 mL of copper (ii) sulfate solution?
You need to use Avogadro's number in this question!
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04/20/21

How many sodium atoms are in 50 mL of salt (sodium chloride)?
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04/20/21

HELP BIOLOGY ITS URGENT
The following is a pre-mRNA sequence. (Recall the 3 things that need to be done to pre-mRNA before it can leave the nucleus.) Please edit and process this sequence to make it a mature mRNA... more
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Science Chemistry

04/20/21

An aqueous reaction is taking place in a liter of water that is being stirred in a 5-liter flask. If the entire reaction was transferred to a 2-liter flask, what's effect on the overall reaction rate?
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Science Biology Ecology

04/20/21

What are some good topics in biology to choose for an open discussion day in class?
Or current events that are interesting
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