4,365 Answered Questions for the topic Science

Science Chemistry Chem

02/08/21

Which of the following solutions would have the lowest freezing point?
a. 0.10 M lithium chlorideb. 0.15 M barium nitratec. 0.20 M potassium iodided. 0.25 M sodium nitratee. 0.20 M calcium bromide
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02/08/21

Clinical Scenario Question about Osteoarthritis
A 65-year-old obese woman with a diagnosis of osteoarthritis (OA) has been having increased pain in her right knee that is made worse with movement and weight-bearing and is relieved by rest.... more
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02/08/21

I'm so confused how to do this physics question
A 2.0 g particle moving at a speed of 8.9 m/s makes a perfectly elastic head-on collision with a resting 1.0 g object.a) Find the speed of each particle after the collision.b) Find the speed of... more
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02/08/21

physics question
At an amusement park, a 96 kg bumper car moving with a speed of 1.24 m/s bounces elastically off a 135 kg bumper car that is initial at rest. Find the final velocities of the two cars.
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02/07/21

Musculoskeletal Disorder Questions
A 39-year-old man is in intensive care after a motorcycle accident in which he skidded across the pavement on his right side. He has fractures of his right femur, pelvis, and several ribs on the... more
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Science Chemistry

02/06/21

At a certain temperature, the equilibrium constant, KC, for this reaction is 53.3. H2(g)+I2(g)↽−−⇀2HI(g)𝐾c=53.3 H 2 ( g ) + I 2 ( g ) ↽ − − ⇀ 2 HI ( g ) K c = 53.3

At a certain temperature, the equilibrium constant, 𝐾c, for this reaction is 53.3.H2(g)+I2(g)↽−−⇀2HI(g)𝐾c=53.3At this temperature, 0.600 mol H2 and 0.600 mol I2 were placed in a 1.00 L container to... more
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Science Chemistry

02/06/21

CHEMISTRY HELP Consider the reaction. A(aq)↽−−⇀2B(aq) KC=7.81×10^−6 at 500 K
Consider the reaction.A(aq)↽−−⇀2B(aq)𝐾c=7.81×10−6 at 500 KIf a 5.40 M sample of A is heated to 500 K, what is the concentration of B at equilibrium?
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02/06/21

Science question
What are some possible ways that a researcher can go about measuring something they are interested in?
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Science

02/05/21

Why is the sky blue?

Why IS the sky blue? Does it reflect from the ocean and become lighter?
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02/05/21

please someone help please i have one question
S   +   6 HNO3  -->  H2SO4  +  6 NO2  +   2 H2OIn the above equation how many moles of water can be made when 47 moles of HNO3 are consumed?Please give and only give explanation and solution.
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02/05/21

Momentum/Impulse
Two objects, A and B, initially at rest, are “exploded” apart by the release of a coiled spring that was compressed between them.As they move apart, the velocity of object A is 5 m/s and the... more
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Science

02/05/21

Nature of science
A block of wood measures 30 cm long, 6 cm wide, 3 cm high, the blocks mass is 270g. What is the density of the block?
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02/05/21

Psychology questions

Why is it important to know how to design a psychological experiment? What are some possible ways that a researcher can go about measuring something they are interested in?
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02/05/21

Intramolecular and Intermolecular forces
Do intramolecular forces (ionic/covalent) or intermolecular forces (dipole/London/Hydrogen) account for the properties associated with different types of bonds?
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02/05/21

can someone please actually help me please
Question 1: 3 Cu  +   8HNO3   g 3 Cu(NO3)2   +  2 NO  +  4  H2OIn the above equation how many moles of NO can be made when 60 moles of HNO3 are consumed?Question 2:... more
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02/05/21

please can i actually please receive help because i have been stuck for many hours
Question 1: 3 Cu  +   8HNO3  --> 3 Cu(NO3)2   +  2 NO  +  4  H2OIn the above equation how many moles of water can be made when 36 moles of HNO3 are consumed?Question 2: Sodium chlorate... more
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02/03/21

Question about Antibodies and Hypersensitivity
Use the following terms to describe the types of antibodies (environmental, allogenic, autoimmune) present with each of the following hypersensitivity reactions: Reaction to pet dander Tissue graft... more
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02/02/21

Pathophysiology Immune Disorders Question
A 32-year old man presents in the allergy clinic with complaints of allergic rhinitis or hay fever. His major complaints are those of nasal pruritis (itching) nasal congestion with profuse watery... more
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01/31/21

What third blood gas is present but not physiologically important under normal circumstances?
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Science Chemistry

01/30/21

Heat Energy and Heat Capacity

If you place 125g of aluminum in a calorimeter with 1.0kg of water and the water changes temperature by 2.0°C and the aluminum changes by -74.95°C:a. How much heat energy has the water gained?b.... more
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Science Chemistry

01/30/21

Enthalpy Changes
50.0mL of 0.500 mol/L of Copper (II) sulfate solution is mixed with 50.0mL of 1.00 mol/L solution of sodium hydroxide in a coffee-cup calorimeter. The temperature change is recorded to be 5.32°Ca.... more
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01/30/21

can someone actually help me please
Question 1: 3 Cu  +   8HNO3  --> 3 Cu(NO3)2   +  2 NO  +  4  H2OIn the above equation how many moles of water can be made when 36 moles of HNO3 are consumed? Question 2: Sodium chlorate... more
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01/30/21

i need help please
Question 1: S   +   6 HNO3  -->  H2SO4  +  6 NO2  +   2 H2OIn the above equation how many moles of H2SO4 can be made when 10 moles of HNO3 are consumed?Question 2: Sodium chlorate decomposes... more
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Science Chemistry

01/30/21

please help me please i have been stuck for many hours
Question 1: 3 Cu  +   8HNO3   g 3 Cu(NO3)2   +  2 NO  +  4  H2OIn the above equation how many moles of NO can be made when 60 moles of HNO3 are consumed?Question 2:... more
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Science Chemistry

01/30/21

please help me please i have been stuck for many hours
Question 1: 3 Cu  +   8HNO3   g 3 Cu(NO3)2   +  2 NO  +  4  H2OIn the above equation how many moles of NO can be made when 60 moles of HNO3 are consumed?Question 2:... more
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