Answer:
70g Na
Explanation:
The sodium reacts with water as follows:
2Na + 2H2O → 2NaOH + H2
<em>Where 2 moles of Na produce 1 mole of H2.</em>
To solve this question we must find the moles of H2. With the balanced equation we can find the moles of Na and its mass as follows:
<em>Moles H2:</em>
PV = nRT; n = PV/RT
<em>Where P is pressure = 1atm,</em>
<em>V is volume = 34L,</em>
<em>R is gas constant = 0.082atmL/molK</em>
<em>T is absolute temperature = 273.15K = 0°C</em>
Replacing:
n = 1atm*34L/0.082atmL/molK*273.15K
n = 1.52 moles H2
<em>Moles Na:</em>
1.52 moles H2 * (2mol Na / 1mol H2) = 3.04 moles Na
<em>Mass Na-Molar mass: 22.99g/mol-</em>
3.04 moles Na * (22.99g / mol) =
<h3>70g Na </h3>
The frequency of a photon with an energy of 8.0 × 10⁻¹⁵ J is
1.21 × 10¹⁹ /s.
How to arrived at the answer is attached below
Please note that v= frequency; h= Plank's constant; E= Energy
Which property describes observable characteristics of matter like color? chemical property
Answer:
I would say A
Explanation:
our ancestors are the people that lived long before us
<span>This is an example of diffusion. The nitrous oxide is moving from an area of higher concentration, down the gradient into the cell, which has a lower concentration. Since the cell doesn't have as much N2O as the surrounding environment, the gas will move inside the cell as a way of attaining equilibrium.</span>
