Answer:
Mass = 14.72 g
Explanation:
Given data:
Volume of hydrogen = 6.58 L
Temperature of gas = 32°C (32+273 = 305 k)
Pressure of gas = 895 mmHg (895/760 = 1.2 atm)
Mass of sodium required = ?
Solution:
Chemical equation:
2HCl + 2Na → 2NaCl + H₂
Number of moles of hydrogen:
PV = nRT
1.2 atm × 6.58 L = n× 0.0821 atm.L/mol.K×305 K
7.9 atm.L = n× 25.0 atm.L/mol
n = 7.9 atm.L / 25.0 atm.L/mol
n = 0.32 mol
Now we will compare the moles of hydrogen with sodium.
H₂ : Na
1 : 2
0.32 : 2/1×0.32 = 0.64 mol
Mass of sodium:
Mass = number of moles × molar mass
Mass = 0.64 mol × 23 g/mol
Mass = 14.72 g
Explanation:
Energy pyramid refers to the representation of how the energy is transferred in the organism at each level in an ecosystem. The producers are kept at the lower level whereas the top carnivore at the top.
1. The energy linearly flows in the energy pyramid which can be represented in the form of the food chain. In a food chain, the energy flows when one organism eats another organism which after digestion provides energy.
2. the energy is transferred in a food chain according to ten per cent law which states that only ten per cent of energy will be transferred between the organism in a food chain.
Answer:
you will find 3 in aluminium
hydrogen should be b 3
and oxygen is 9
All are gases so no visible reaction persay, unless in closed quarters and then massive pressure.
