Answer:
Explanation:
q = (mass) (temp change) (specific heat)
q = (10000 g) (40 °C) (0.385 J/g⋅°C) = 154000 J = 154 kJ
154 kJ / 2220 kJ/mol = 0.069369369 mol
0.069369369 mol times 44.0962 g/mol = 3.06 g (to three sig figs)
answer choice 4
Answer:
6
Explanation:
You will see H6 and the H stands for helium and the 6 is how many of that atom is there
Answer:
I) increasing the reaction temperature shift equilibrium left
II) decreasing the reaction temperature equilibrium right
Explanation:
The equation C6H12O6(s)+6O2(g)⇌6CO2(g)+6H2O(g) represent cellular respiration where glucose is oxidized by oxygen to yeild carbon dioxide and water respectively. Also energy is released to drive cellular processes.
Since, cellular respiration is an exothermic reaction:
- increasing the reaction temperature shift equilibrium to left favoring the reactants, glucose and oxygen production
- decreasing the reaction temperature shift equilibrium to right favoring the products, carbon dioxide and water production
Answer:
Passivation of Oxide layers of the metals.
Explanation:
Passivation is a non-electrolytic finishing process that makes most metals rust-resistant. The prosses removes free iron from the surface by using either nitric or citric acid. When this happens, it results to an inert, protective oxide layer that is very slow or less likely to chemically react with air and cause corrosion.
Passivity caused many of the metals several minutes to begin to react. Once the finishing process that makes metals less likely to react was eroded, reaction was initiated vigorously.
The relationship between Fahrenheit and Celsius is:
°F = 1.8*°C + 32
If we differentiate the given expression to find the relationship between a unit change of °F and °C, we get:
Δ°F = 1.8*Δ°C
This means that a change in 1 degree Fahrenheit is equivalent to a change of 1.8 degrees Celsius. Moreover, a one degree change in Fahrenheit is the same as a one-degree change on the Rankine scale, so, ranking the scales in order from higher change to lower change:
1) Fahrenheit = Rankine
2) Celsius = Kelvin
