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Answer:
Q = 18625.95 j
Explanation:
Given data:
Mass of steel = 525 g
Initial temperature = 123 °C
Final temperature = 50 °C
Heat release by steel = ?
Specific heat capacity of steel = 0.486 j/g. °C
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = T2 - T1
ΔT = 123°C - 50°C
ΔT = 73°C
Q = m.c. ΔT
Q = 525 g. 0.486 j/g.°C . 73°C
Q = 18625.95 j
<span>The most significant factor that controls the development of soil is B. climate. Depending on what the climate and the weather are like in a particular area, the soil will be either developed and healthy and fertile, or it won't if the conditions are too harsh. If the weather is nice, usually the soil will form which will be suitable for crops and agriculture, but if it's too hot or too cold, the soil won't be used for such things as it won't be fertile.</span>
Answer:
You can feel the heat transfer from a fire and from the Sun. Similarly, you can sometimes tell that the oven is hot without touching its door or looking inside—it may just warm you as you walk by. The space between the Earth and the Sun is largely empty, without any possibility of heat transfer by convection or conduction. In these examples, heat is transferred by radiation. That is, the hot body emits electromagnetic waves that are absorbed by our skin: no medium is required for electromagnetic waves to propagate. Different names are used for electromagnetic waves of different wavelengths: radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.
Answer:
D- 31.9988 g/mol
Explanation:
The molar mass of a substance is the mass in grams of one mole of the substance. For a compound, the molar mass is the gram - formula mass or gram - molecular weight. It is determined by the addition of its component atomic masses;
To find molar mass of O₂;
Atomic mass of O = 15.9994g/mol
Molar mass of O₂ = 2(15.9994) = 31.9988g/mol
