4,347 Answered Questions for the topic Science

12/10/21

Determining the percentage composition of Vinegar.
In this lab, we were titrating CH₃COOH with NaOH. we used an average of 33.433 mL of 0.7 molarity NaOH to neutralize 25mL of CH₃COOH. The questions are:calculate the moles of NaOH from the average... more
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12/10/21

How many milliliters of a 0.9% solution of sodium chloride should be used in compounding the prescription?
Phenylephrine hydrochloride 1%Chlorobutanol 0.5%Sodium chloride qsPurif ed water ad 15 mLMake isotonic sol.Sig. use as directed
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12/09/21

Sodium chloride is a 2-ion electrolyte, dissociating 90% in a certain concentration. How to calculate (a) its dissociation actor and (b) the freezing point of a molal solution?
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12/09/21

Isotonic sodium chloride solution contains 0.9% w/v sodium chloride. If the E-value of boric acid is 0.52, what is the percentage strength (w/v) of an isotonic solution of boric acid?
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12/09/21

MOLECULAR GEOMETRY OF AMMONIA
Tell me if I indicated the right statements that would describe the molecular geometry of NH3 (Ammonia) if not, please kindly correct me.a. General Formula : AX3Eb. Total Number of Electron Domains... more
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Science Math

12/08/21

What is the mass of a block that is 4.5 cm x 3.4 cm x 2 cm and has a density of 12.30 g/cm^3
Is it 376.4 cm, 376.4 g, or 55.35 g.
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Science Math Physics

12/08/21

Physics vector problem
What is the direction equivalent to – [40° W of S]?a) [40° E of S]b) [40° W of N]c) [40° E of N]d) [50° S of W]e) [50° E of N]
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12/07/21

I need help i dont understand! and expkanabtion needed

Objects or substances that absorb any wavelength of electromagnetic radiation become warmer anda. Produce a gas b. convert the absorbed energy to infrared radiation. c. Convert the absorbed energy... more
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Science Math Physics

12/07/21

Dynamics question physics problem
A piece of ice (m = 500.0 g) slides down the slope of a roof inclined at 50.0°. It starts from rest and slides 8.0 m along the roof, sliding off the edge at a height of 4.0 m above the level... more
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Science Math Physics

12/07/21

Dynamics and statistics physics problem
Three books rest horizontally on a table as pictured below. What forces does the middle book exert on each of the other two? Be specific in expressing your answers. Link to image:... more
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Science Math Physics

12/07/21

Physics dynamics problem
The Russell traction apparatus is used for a fractured femur. When the femur is healing, the muscles of the upper leg tend to pull the two sections of the femur together, which could result in a... more
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12/07/21

Please help with this ap bio practice FRQ
In eukaryotic cells, ribosomes are found both free in the cytosol and attached to the endoplasmic reticulum (ER).Proteins produced on the attached ribosomes are delivered to the ER, while proteins... more
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12/07/21

QUESTION ABOUT QUANTUM NUMBERS
what is the n, l, and ml value of the given orbitals below? (quantum numbers) 3p 5f 4d
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12/06/21

A 3.8 kg lead ball is dropped into a 2.5 L insulated pail of water initially at 20.0∘C.
A 3.8 kgkg lead ball is dropped into a 2.5 LL insulated pail of water initially at 20.0∘C∘C.If the final temperature of the water-lead combination is 26.8 ∘C∘C, what was the initial temperature of... more
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12/06/21

By what factor will the rms speed of gas molecules increase if the temperature is increased from 30 ∘C to 130 ∘C?
By what factor will the rms speed of gas molecules increase if the temperature is increased from 30 ∘C∘C to 130 ∘C∘C?
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12/06/21

A storage tank at STP contains 18.9 kg of nitrogen (N2).What is the volume of the tank?
A storage tank at STP contains 18.9 kgkg of nitrogen (N2)(N2).What is the volume of the tank?What is the pressure if an additional 14.2 kgkg of nitrogen is added without changing the temperature?
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Science Psychology

12/06/21

How do I know that my method is correct for my experiment

If I was to do a n-of-1 study on expressive writing and it’s benefits in reducing anxiety, would it be better if I flipped a coin and make it randomised and did one day with and one day without or... more
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12/05/21

How to solve this chemical equation?
NaHCO3 (s) + HC6 H8 O7 (s) → H2 CO3 (aq) + NaC6 H8 O7 (aq) H2 CO3 (aq) → H2 O (l) + CO2 (g)
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12/05/21

How many grams of NO will be produced from 75.1 g of NO₂ reacted with excess water in the following chemical reaction? 3 NO₂(g) + H₂O(l) → 2 HNO₃(g) + NO(g)
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12/05/21

How many grams of NO will be produced from 75.1 g of NO₂ reacted with excess water in the following chemical reaction? 3 NO₂(g) + H₂O(l) → 2 HNO₃(g) + NO(g)
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Science Math Physics

12/04/21

Vector question
The direction of an object's velocity changes from east to north. what is the direction of the acceleration?
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Science Math Physics

12/04/21

Velocity physics question
A ball is thrown up in the air and then caught at the same height. The acceleration is 9.8 m/s² [down]:a) on the way upb) on the way downc) at the peak of its trajectoryd) two of a, b and c are... more
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Science Math Physics

12/04/21

Vectors and direction question
What is the direction equivalent to – [40° W of S]?
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12/04/21

DETERMINE IF THE GIVEN QUANTUM NUMBERS ARE VALID
Determine whether the following sets of quantum numbers are valid or not. If valid, identify the atomic orbital being described and explain it briefly. Any explanations would help me a lot because... more
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12/03/21

Scientific Reasoning Questions
1.Give an example in which dominance reasoning recommends a certain action where maximizing expected utility recommends an incompatible action. 2. Describe how Ramsey proposes to assign numerical... more
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