Answer:
V = 250 cm3
= 250 × 10^(-3) dm3
= 1/4 dm3
no. of mole = 0.2×1/4 mol
= 0.05 molExplanation:
Answer:
Mass = 799971.50 g
Explanation:
Given data:
Mass of ethene = 560 Kg (560 Kg ×1000 g/1 Kg= 560000 g)
Mass of ethanol produced = ?
Solution:
Chemical equation:
C₂H₄ + H₂O → C₂H₅OH
Number of moles of ethene:
Number of moles = mass/molar mass
Number of moles = 560000 g / 28.05 g/mol
Number of moles = 19964.35 mol
Now we will compare the moles of ethene and ethanol.
C₂H₄ : C₂H₅OH
1 : 1
19964.35 : 19964.35
Mass of ethanol:
Mass = number of moles × molar mass
Mass = 19964.35 mol × 46.07 g/mol
Mass = 799971.50 g
Answer: The scientific reasons for going to Mars can be summarised by the search for life, understanding the surface and the planet's evolution, and preparing for future human exploration. Understanding whether life existed elsewhere in the Universe beyond Earth is a fundamental question of humankind.
Explanation:
Answer:
dt = 4.32°C
Explanation:
<u>Given the following data;</u>
Mass = 16.33g
Quantity of heat, Q = 63.4J
Specific heat capacity = 0.899 J/g °C
To find the temperature change;
Heat capacity is given by the formula;
Where;
- Q represents the heat capacity or quantity of heat.
- m represents the mass of an object.
- c represents the specific heat capacity of water.
- dt represents the change in temperature.
Making dt the subject of formula;
Substituting into the equation, we have;
dt = 4.32°C
Therefore, the change in temperature for this aluminum is equal to 4.32°C.
Experiments have determined that in 12 g of 12<span>C there are 6.022 x </span><span>1023</span><span> atoms </span>12C. This number is called the Avogadro's number. This <span>represents the number of
units in one mole of any substance. Hope this answers the question. Have a nice day.</span>