Mass of the water is 2.63 g.
<u>Explanation:</u>
Mass of the water, m = ? g
Temperature, ΔT = 15 °C
Heat absorbed, q = 165 J
Specific heat capacity, c = 4.18 J / g °C
q = m × c × ΔT
Now, we have to find the mass of the water by rewriting the above equation as,
m = 
Now Plugin the above values in the equation as,
m = 
= 2.63 g
So the mass of the water is found as 2.63 g.
Moles of O₂ = 3.92
<h3>Further explanation</h3>
Given
V=1 L
T=-118 °C + 273 = 155 K
P = 49.77 atm
Required
moles of O₂
Solution
the gas equation can be written
where
P = pressure, atm
V = volume, liter
n = number of moles
R = gas constant = 0.08206 L.atm / mol K
T = temperature, Kelvin
Input the value :
n= PV/RT
The correct unabbreviated electron configuration is as below
Vanadium - 1S2 2S2 2P6 3S2 3p6 3d3 4s2
Strontium - 1s2 2S2 2P6 3S2 3P6 3d10 4S2 4P6 4S2
Carbon =1S2 2S2 2P2
<u><em> Explanation</em></u>
vanadium is in atomic number 23 in the periodic table hence its electron configuration is 1s2 2s2 2p6 3s2 3p6 3d3 4s2
Strontium is in atomic number 38 in periodic table hence its electron configuration is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4s2
Carbon is in atomic number 6 in periodic table therefore its electron configuration is 1s2 2s2 2p2
The answer for 1/0.00032 in standard scientific notation is 3.125 * 10^3.
<u>Explanation</u>:
For conversion of the given number in scientific notation follow
a * 10^b
The steps to see how 3,125 written in scientific notation as follows.
Step 1
To find a, The number is moved right to one decimal place.
Original Number: 3,125
New Number: 3.125
Step 2
Now, to find b, Find the decimal count on the right side.
New Number: 3 .1 2 5
Decimal Count: 1 2 3
There are three places found.
Step 3
Now we can reconstruct the number into scientific notation.
The Scientific notation is: a x 10^b
a = 3.125
b = 3
Now writing the whole thing:
3.125 x 10^3
Step 4
Check your work:
10^3 = 1,000 x 3.125 = 3,125.
