The balanced equation for the reaction between calcium and water to produce calcium hydroxide and hydrogen is

The mass defect is the discrepancy between the nucleus of an atom's anticipated mass and its actual mass. This discrepancy is due to the binding energy of a system, which might manifest as excess mass.

A key characteristic of a nucleus is the nuclear mass defect, which has a set value equal to a specific amount of binding energy for that nucleus.

The binding energy (BE) of a nucleus is the mass defect multiplied by the square of the speed of light or the energy released during the nucleus' formation.

Mass of the atom = 64.949563 amu

Mass of the proton = 1.007825 amu

Mass of the neutron = 1.008665 amu

Arsenic has 33 protons and 42 neutrons.

Mass defect = Mp + Mn - MA

= 33 × 1.007825 + 42 × 1.008665 - 64.949563

= 33.258225 + 42.36393 - 64.949563

= 10.672592 amu/atom

Therefore, the mass defect of atom is 10.672592 amu/atom.

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4 0

1 year ago

For the reaction N2O4(g) m 2 NO2(g), a reaction mixture at a certain temperature initially contains both N2O4 and NO2 in their s

kirza4 [7]

Answer:

c) Q > K, the reaction will proceed to the right

Explanation:

The given reaction is:

$N2O4(g)\rightleftharpoons 2NO2(g)$

The direction in which the above reaction will shift is based on the relation between the values of the equilibrium constant (K) and the reaction quotient (Q)

If Q = K, the reaction is at equilibrium

If Q < K, the reaction shifts to the left

If Q > K, the reaction shifts to the right

For a gas phase reaction, Q is given as:

$Qp = \frac{Products}{Reactants}$

Here,

$Qp = \frac{[NO2]^{2} }{[N2O4]} \\\\Under\ standard\ state\ : \\\\Pressure\ NO2 = \ Pressure\ N2O4\ = 1\ atm\\\\Qp = \frac{[1.00]^{2} }{[1.00]} = 1$

Kp = 0.15

Qp = 1.00

Since Qp > Kp, the reaction will shift to the right

6 0

3 years ago

Organism in kingdoms archaebacteria live in environments that are very hot or very cold Which other characteristics is common to

vodomira [7]

Answer:

Archaebacteria belong to the kingdom 'Archaea'. They resemble bacteria when observed under a microscope.They are single-cell organisms. However,they differ from prokaryotes in many ways.

•They have a completely different cell membrane so that they can survive and thrive in harsh environments

•Unlike bacteria,their cell wall and membrane can be stiff and gives a specific shape such as flat,rod shaped or cubic.

•the absence of peptidoglycan in cell wall,instead contain lipid and protein to give them strength and resistance against chemical.

•The cell membrane of archae are made up of phospholipid bilayer but unlike bacteria and eukaryotes,the bilayers have ether bonds.These ether bonds have the ability to resist chemical and helps them to survive in very extreme environments that might otherwise kill them.

•They have multiple RNA polymerase that contain multiple polypeptide

•They have initiator tRNA with unmodified methionine(unlike bacteria).

•They have the ability to survive in very high temperatures,in acidic environment and alkaline environments and even have tolerance for high salt content.

6 0

3 years ago