What goes in the rest?
Answers
Answer:
E. Mass number
H. Ion
F. Isotopes
I hope you have a great day. I'm sorry that I didn't know C or I.
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Which renewable energy sources should be developed in your area, and why? Consider abundance of the energy source, ease of setup in your area, and cost.Review the seven questions. Write a few sentences summarizing what you already know about these topics.
Answers
Mass of water: 43 g
Explanation:
When a substance is heated, the temperature of the susbtance increases according to the equation:
where
Q is the amount of heat supplied to the substance
m is the mass of the substance
C is the specific heat capacity of the substance
is the increase in temperature
In this problem, we have:
Q = 4300 J is the heat absorbed by the water
C = 4200 J/gC is the specific heat capacity of water
is the increase in temperature
By re-arranging the equation, we can find the mass:
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Final answer:
The mass of the water sample can be calculated using the formula for heat absorption: Q = mcΔT.
Given that the water sample absorbed 4300 joules of heat and the temperature increased from 15°C to 39°C, the mass of the water sample is approximately 43.03 grams.
Explanation:
This physics problem can be solved by using the formula for heat absorption:
Q = mcΔT,
where Q is the heat absorbed (in joules), m is mass (in grams), ΔT is the change in temperature (in °C) and c is the specific heat capacity. For water, c is 4.186 joules/gram°C.
The change in temperature (ΔT) of the water sample is the final temperature (39°C) minus the initial temperature (15°C), which equals 24°C.
Using the given value for Q (4300 joules), we rearrange the formula to calculate m (mass):
m = Q / (cΔT) = 4300 / (4.186*24) ≈ 43.03 grams.
Thus, the mass of the water sample is approximately 43.03 grams.
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Answers
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Answers
B. lungs
C. skin
D. brain
Answers
The organ that is not considered a part of the excretory system is the brain and the correct option is option D.
The excretory system primarily consists of organs and structures involved in the elimination of waste products from the body. The kidney, lungs, and skin are all essential components of the excretory system.
The kidney plays a central role in filtering waste products from the blood and producing urine. The lungs are responsible for the elimination of carbon dioxide, a waste product of cellular respiration, through the process of breathing. The skin, through sweat glands, helps eliminate metabolic waste products such as urea and excess salts through perspiration.
On the other hand, the brain is primarily involved in regulating and coordinating various bodily functions, including cognition, movement, and sensory processing. While the brain plays a crucial role in overall body functioning, it is not directly involved in the excretion or elimination of waste products from the body.
Thus, the ideal selection is option D.
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Answer:
D. BRAIN
Explanation:
The human excretory system includes the lungs, the skin, and the urinary system (kidneys, ureters, bladder, and urethra).
Answers
The liquid will suspend and turn into a solid. Phase changes are what creates one state of matter to turn into different. Freezing, condensation, and deposition are created by the loss of kinetic energy. As kinetic energy is increased, particles start to move apart. The molecules gain or lose power, the more energy these molecules have the easy it is for them to break the bonds holding them collectively, this is when you practice enough heat to a substance it changes from a solid to a liquid than from a liquid to a gas.
Final answer:
When a liquid releases enough energy, it undergoes a phase change from liquid to gas. This process is called evaporation or boiling.
Explanation:
When a liquid releases enough energy, it will undergo a phase change from liquid to gas. This process is called evaporation or boiling.
When enough energy is added to the liquid, the molecules gain enough kinetic energy to overcome intermolecular forces and escape the liquid phase. This energy comes in the form of heat.
For example, when water is heated, it reaches its boiling point and begins to evaporate, turning into water vapor. This is an endothermic process, meaning it requires energy input.
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Answers
The number of molecules of isopently acetate is 4.63 x 10¹⁵ molecules
calculation
Step 1: find the moles of isopently acetate( C₇H₁₄O₂)
moles = mass÷ molar mass
From periodic table the molar mass of C₇H₁₄O₂
= (12 x7 ) + (1 x14) +(16 x2) =130 g/mol
moles = 1 x10⁻⁶ g÷ 130 g/mol = 7 x 10⁻⁹ moles
step 2 ; use the Avogadro's law constant to calculate the number of molecules
That is according to Avogadro's law 1 mole = 6.02 x 10²³ molecules
7 x 10⁻⁹ moles = ? molecules
by cross multiplication
= { (7 x 10⁻⁹ moles x 6.02 x10²³ molecules) / 1 mole} = 4.63 x 10¹⁵ molecules