In most of its compounds, this element exists as a monatomic cation.(A) F
(B) S
(C) N
(D) Ca
(E) Cl
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Newton’s first law of motion was a giant leap forward in scientific thought during Newton’s time. Even today, the idea is sometimes difficult at first for people to understand.
#1: Which of the following is an exothermic reaction? A. dissolving ammonium nitrate in water to cool the water B. condensation C. melting ice D. dissolving sugar in water. #2: Two objects (A and B) of the same temperature are in contact with each other. Which of the following statements is true? A. Heat transfers from object B to object A, because molecules from B collide with those from A. B. Heat transfers from object A to object B, because molecules from A collide with those from B. C. Although the molecules collide, no heat transfers because there is no temperature difference between the objects. D. No heat transfers, because there are no collisions between the molecules of the objects. #3: Which of the following parameters is kept constant in a coffee-cup calorimeter? A. temperature B. volume C. pressure D. kinetic energy #4: What type of substance would be best for use in a heating system? A. a liquid with a high specific heat B. a solid with a high specific heat C. a liquid with a low specific heat D. a gas with a low specific heat. #5: The reaction 2 NO(g) → N2(g) + O2(g) has a ΔH = -180.5 kJ. How much heat will be required to produce 44.8 L of NO by the reverse reaction? A. 644 kJ B. 180.5 kJ C. 301 kJ D. 322.3 kJ
What word is not associated with Exothermic? A)absorbs energy B )burning firewood C )freezing water D) releases energy
B. phosphorous (P)
C. sulfur (S)
D. oxygen (O)
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Answer: Phosphorous
Explanation: Nitrogen(N): 7:
Phosphorus(P): 15:
Oxygen(O): 8:
Sulphur(S): 16:
As nitrogen contains half filled configuration, it is stable and does not react. Phosphorous lies below nitrogen and reactivity decreases down a group for non metals as they tend to gain electrons as the valence shell move away from the nucleus.
Oxygen has 4 valence electrons, thus it need to gain two electrons to attain stable configuration. Thus is reactive.
Sulphur lies below oxygen and also need to gain two electrons. Reactivity decreases down a group for non metals as they tend to gain electrons as the valence shell move away from the nucleus.
Under which color of light will plants be least likely to make food?
red
blue
orange
green
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Answer:
The color of light in which plants are less likely to produce food is green.
Explanation:
Photosynthesis is the process by which plants take advantage of sunlight to convert it into chemical energy, necessary to manufacture their nutrients, their growth and development.
Plants do not absorb all the colors of the light spectrum, since due to their pigments they absorb colors with specific wavelengths. Green plants do not absorb the color green, but reflect it —due to the chlorophyll pigment— which gives the green color to those leaves.
For this reason, the light that plants take least advantage of to produce food is green light.
Other options:
The colors blue, orange and red can be absorbed by the plant, to a lesser or greater degree.
Answer:
it would be green
Explanation:
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g/eq = molar mass / number of H⁺
g/eq = 98 / 2
= 49 g/eq
Volume in liters = 500 mL / 1000 => 0.5 L
N = 20 / 0.5 x 49
N = 20 / 24.5
= 0.816 N
hope this helps!
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In my words though, the oxidation state helps with you knowing how many electrons are lost or gain by the reactant to produce its product and by knowing this you can then balance the electron transfer and ultimately the equations.
be (in grams)?
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I legitimately think it's 87.3 grams
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The reaction is:
Cl2(aq) + 2Br-(aq) --> 2Cl-(aq) + Br2(aq)
The oxidizing agent is the one that is being reduced which is chlorine where the charge changed from neutral to -1 while the reducing agent is the one being oxidized which is bromine where the charge change from -1 to a neutral charge.
Answer:
The answer is C:
Chlorine (Cl) is the oxidizing agent because it gains an electron