It's b. calcium
because the outer electron structure in all of that element is similar, they have the same chemical and physical properties.<span />
The mass of CO = 112 g
<h3>Further explanation
</h3>
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³ particles
Moles can also be determined from the amount of substance mass and its molar mass
number of atoms in 88 g CO₂ :
number of atoms in CO :
number of atoms in CO₂ = number of atoms in CO :
Answer:
-171.79 KJ
Explanation:
We must keep in mind that water freezes at 0 degrees centigrade
Recall that heat lost during freezing can be obtained from;
H = mc(θ2 - θ1)
m = mass of the water = 350 g/1000 = 0.35 Kg
c = specific heat capacity of water = 4,200 J/kg°C
θ2 = final temperature = 0°C
θ1 = initial temperature = 37°C
H= 0.35 * 4,200 * (0 - 37)
H = -54390 J = -54.39 KJ
Energy given out when 1 mole of water freezes at its freezing point = -6.04 kJ
For 350 g of water; 350 g/18 g/mol * -6.04 kJ = -117.4 kJ
Hence total energy removed = (-54.39 KJ) + (-117.4 kJ) = -171.79 KJ
The texture of an igneous rock is determined by it grain size
This is because no matter how hard you try to shake or combine the oil and vinegar<span> together, they eventually </span>separate<span>. This happens because </span>vinegar<span> and </span>oil<span> are made of very different types of molecules that are attracted to their own kind.</span>