We know, Given mass = Molar mass * Number of moles.
A.) <span>1.25 mol CaF</span>₂
Number of moles = 1.25
Molar mass = 78
So, Mass = 78 * 1.25 = 97.5 g
B.) 3.4 mol (NH₄)₂SO₄
Number of moles = 3.4
Molar mass = 132
Mass = 3.4 * 132 = 448.8 g
Hope this helps!
Answer:
a) 0
Explanation:
Each of the small dots surrounding the C1 represents one electron. These are where electrivity comes from. Since there is the same number of electrons in both atoms, the difference is 0 (because 6 electrons-6electrons= 0).
Answer:
d = 11400 kg/m³
Explanation:
The density of lead is 11.4 g/cm³
We need to convert the density in kg/m³ in scientific notation.
We know that,
1 kg = 1000 g
1 cm = (1/100) m = 0.01 m
Density,
So, the density of the lead is 11400 kg/m³.
Answer : A = reactant, B = activated complex, C = product, D = activation energy.
This is an exothermic reaction.
Explanation :
Activated complex : When the reactant molecules absorb energy, their bonds are loosened and new lose bonds are formed between them. The intermediate thus formed is known as activated complex or transition state. It is unstable state and immediately dissociates to form the stable products.
Activation energy : It is defined as the minimum amount of energy absorbed by the reactant molecules so that their energy becomes equal to the threshold energy.
Endothermic reaction : It is a type of chemical reaction where the energy is absorbed from the surrounding. In the endothermic reaction, the reactant are less than the energy of product.
Exothermic reaction : It is a type of chemical reaction where the energy is released into the surrounding. In the exothermic reaction, the energy of reactant are more than the energy of product.
Hence, in the given energy graph, A = reactant, B = activated complex, C = product, D = activation energy. This is an exothermic reaction.
Answer:
well it depends of the distance, but u get your frequency and u times it by a round number if im correct
Explanation: