Answer:
R=0·083 J/mol·K
Explanation:
Ideal gas equation is
<h3>P×V = n×R×T</h3>
where,
P is the pressure of the gas
V is the volume of the gas
n is the number of moles of the gas
R is ideal gas constant
T is the temperature of the gas in Kelvin
In case of given problem
Temperature of the gas = 273+2·00=275·00K
P=259,392·00× atm
(259,392·00× )×8·8 = 1×R×275·00
∴R=0·0830 J/mol·K
But according to the rules of significant figures the value of R must be with least precision of all the values of the other parameters from which the value of R is calculated
Here the least precision is in the volume as it contains only 2 significant digits
∴ Value of R must contain 2 significant digits
∴ R=0·083 J/mol·K
Unfortunately, you failed to include the table 1 from which the molar heat capacity of aluminum could have been obtained. However, as a general rule, the heat needed to raise the temperature of a certain substance by certain degrees is calculated through the equation,
H = mcpdT
where H is heat, m is mass, cp is specific heat capacity, and dT is change in temperature. From a reliable source, cp for aluminum is equal to 0.215 cal/g°C. Substituting this to the equation,
H = (260.5 g)(0.215 cal/g°C)(125°C - 0)
H = 7000.94 cal
1.12 miles of MgCl2 will be produced from the 32.0 of Mg(OH)2
Answer:
i think its A
Explanation:
bc the nucleus is the very center of whatever the organism is.