Answer:
The periodic table was made that way by the scientists who created it
Explanation:
to make things easier for the users.
Answer:
179Kj/mol
Explanation:
The equation for the reaction is:
CaO + 3C ⇒ CaC₂ + CO
₂
The formula for calculating the heat absorbed is:
∆Hf (Products) - ∆Hf (Reactants)
Using the heat of formation (∆Hf) for each component in the reaction
∆Hf Cao = -635kj/mol
∆Hf C = 0kj/mol
∆Hf CaC2 = -63kj/mol
∆Hf CO2 = -393.5
The heat absorbed = ( -63 + -393.5) – (-635)
= - 456 + 635
= 179kj/mol
The density<span> of a material is defined as its mass per </span>unit<span> volume. In this example, each volume of water is different and therefore has a specific and unique mass. The mass of water is expressed in grams (g) or kilograms (kg), and the volume is measured in liters (L), cubic centimeters (cm </span>3<span>), or milliliters (mL). hope that helped</span>
