The approximate pH of a 5x10-3 MHCl solution is 3.
The pH of a solution can be calculated using the formula pH = -log[H+], where [H+] represents the concentration of hydrogen ions in the solution. In this case, we have an HCl solution with a concentration of 5x10-3 M. To find the pH, we need to convert the concentration into the molarity of H+ ions. Since HCl is a strong acid, it dissociates completely in water, meaning that 1 molecule of HCl yields 1 H+ ion. Therefore, the molarity of H+ ions is also 5x10-3 M. Plugging this value into the pH formula, we get:
pH = -log(5x10-3)
pH = -(-3) = 3
Therefore, the approximate pH of the 5x10-3 M HCl solution is 3.
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Answer:
22.4 L methane reacts with 44.8L of oxygen to give 44.8L of CO
2 and 22.4 L of water
Explanation:
From the balanced reaction: One mole(or 1 molecule or 16 g) of CH
4
reacts with 2 moles (or 2 molecules or 64 g) of oxygen to give one mole (or 1 molecule or 44 g) of CO
2
and 2 mole (or 2 molecules or 36 g) of water.
For the gaseous system at STP:
22.4 L methane reacts with 44.8 L of oxygen to give 22.4 L of CO
2
and 44.8 L of water.
and 2 mole (or 2 molecules or 36 g) of water.
For the gaseous system at STP:
22.4 L methane reacts with 44.8 L of oxygen to give 22.4 L of CO
2
and 44.8 L of water.
The universe is expanding is as the galaxies are moving away from each other, and the temperature of the universe is decreasing. Therefore, option (1) is correct.
First scientists theorized that as the universe is expanding and its temperature has gradually decreased. The universe has been expanding since the Big Bang and, as it expands, it’s temperature cooling down.
The temperature of the universe can be measured by looking at the cosmicmicrowave background (CMB). The temperature an be estimated by the thermal radiation left over from the BigBang.
The CMB scientists have been investigating that its temperature has been dropping off gradually as our universe expands out and the current average temperature of the cosmos is estimated about 2.73 Kelvin.
The point of the Big Bang from the Big bang theory is described as densesingularity and infinitely hot. The energy from the Big Bang distributed as the universe expands and gives the cooling effect.
But new research suggests otherwise that the temperature of the earth is actually increasing as it expands. Therefore, the temperature of universe increasing with its expansion.
Learn more about universe expanding, here:
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Arrhenius base is a substance that , when dissolved in an aqueous solution , increase the concentration of hydroxide (OH) ion in the solution
I hope that's help !
What do you think energy has to do with the heating systems
Answer:
thermal energy is used to heat water, which is pumped through a system of pipes and radiators. a warm-air heating system burns fuel in a furnace to produce thermal energy.