Answer:
friction
Explanation:
the resistance that one surface or object encounters when moving over another.
<span>pb(no3)2 + 2 nacl → pbcl2 + 2nano3</span>
First, in order to calculate the specific heat capacity of the metal in help in identifying it, we must find the heat absorbed by the calorimeter using:
Energy = mass * specific heat capacity * change in temperature
Q = 250 * 1.035 * (11.08 - 10)
Q = 279.45 cal/g
Next, we use the same formula for the metal as the heat absorbed by the calorimeter is equal to the heal released by the metal.
-279.45 = 50 * c * (11.08 - 45) [minus sign added as energy released]
c = 0.165
The specific heat capacity of the metal is 0.165 cal/gC
Answer: The mass of given amount of copper (II) cyanide is 462.4 g
Explanation:
To calculate the number of moles, we use the equation:
We are given:
Moles of copper (II) cyanide = 4 moles
Molar mass of copper (II) cyanide = 115.6 g/mol
Putting values in above equation, we get:
Hence, the mass of given amount of copper (II) cyanide is 462.4 g
Answer:
The correct answer is a the central core and is composed of protons and neutrons.
Explanation:
Nucleus is present in the center of an atom.Nucleus contain positively charged particle proton along with neutron which is neutral.
Due to the the presence of protons nucleus contain positive(+ve) charge.
