Answer:
0.0957 g
Explanation:
Half life is the time required by the substance to decay to half of its initial mass. Most often exponential decays of radioactive substances are explained by half life. Half life remains constant throughout the life of decay.
It is given as;
<em> N</em>(t) = N₀ (1/2)^t/t1/2
Where;
<em>N</em>(t) = Amount remaining after certain time
N₀ = The starting initial amount
t1/2 = Half life of given substance
Putting values,
<em> N</em>(t) = 98 × (1/2)^215/21.5
<em> N</em>(t) = 0.0957 g
Protons is the answer I think u are needing
Structural formula of a molecule shows:
a. the arrangement of bonded atoms
b. the number of ionic bonds
c. the number of metallic bonds
d. the shapes of molecular orbitals
Answer. Metals are excellent conductors because the atoms in a metal form a matrix through which their outer electrons can move freely. Instead of orbiting their respective metal atoms, they form a "sea" of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions
Answer:
Final temperature = 28.0 degrees C.
Explanation:
heat absorbed = mass * specific heat * rise in temperature.
The specific heat of water is 4.186 J /g/C so we have the equation
209 = 10 * 4.186 * x where x is the temperature increase
41.86x = 209
= 5 degrees C.
