1.27g
Explanation:
Given parameters:
Number of moles of C₂₀H₄₂ = 4.52 x 10⁻³moles
Unknown:
Mass of the compound = ?
Solution:
The mole is a comfortable unit for measuring chemical substances.
number of moles = 
Molar mass of C₂₀H₄₂ = (12 x 20) + (1 x 42) = 240 + 42 = 282g/mol
Mass of the compound = number of moles x molar mass
= 4.52 x 10⁻³ x 282
= 1.27g
learn more:
Number of moles brainly.com/question/1841136
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- The reaction in which we can't take back the product to reactant form .Or in simple words the reaction which is irreversible is called chemical reaction
Example:-
We cannot pull back the reaction to get wax back .
Answer:
We need 3910.5 joules of energy
Explanation:
Step 1: Data given
Mass of aluminium = 110 grams
Initial temperature = 52.0 °C
Final temperature = 91.5 °C
Specific heat of aluminium = 0.900 J/g°C
Step 2: Calculate energy required
Q = m*c*ΔT
⇒with Q = the energy required = TO BE DETERMINED
⇒with m = the mass of aluminium = 110 grams
⇒with c = the specific heat of aluminium = 0.900 J/g°C
⇒with ΔT = the change in temperature = T2 - T1 = 91.5 °C - 52.0 °C = 39.5 °C
Q = 110 grams * 0.900 J/g°C * 39.5
Q = 3910.5 J
We need 3910.5 joules of energy
I think it's C. Please mark brainliest
Answer:
True
Explanation:
When ice is heated, the ice gains heat.
This heat gained by the ice is both used to break the intermolecular forces in ice to form water, as well as to raise the temperature of the water to it's final temperature.
