Answer:
2.02 × 10²³ atoms
Explanation:
Step 1: Calculate the moles corresponding to 37.8 g of cadmium
To convert mass to moles, we need a conversion factor: the molar mass. The molar mass of cadmium is 112.41 g/mol.
37.8 g × 1 mol/112.41 g = 0.336 mol
Step 2: Calculate the number of atoms in 0.336 moles of cadmium
To convert moles to atoms, we need a conversion factor: Avogadro's number. In 1 mole of atoms of cadmium, there are 6.02 × 10²³ atoms of cadmium.
0.336 mol × 6.02 × 10²³ atoms/1 mol = 2.02 × 10²³ atoms
Answer: D) Monitor the sea level over set period of time.
Since global warming causes land ice to melt, that water goes into the ocean to raise sea levels. This is an effect of global warming.
Choices A through C are things to measure if you want to measure causes of global warming, so we can rule those out.
Answer:
267.57 kPa
Explanation:
Ideal gas law:
PV = n RT R = 8.314462 L-kPa/K-mol
P (16.5) = 1.5 (8.314462)(354) P = 267.57 kPa
Assuming the balloon initially has volume of 0 when deflated, the total P(deltaV) = (1.00 atm)(550,000 ft^3) = 550,000 atm-ft^3. To convert into work units, we can first convert ft^3 to L:
(550,000 atm-ft^3)(1 m/3.28 ft)^3
= (15,586.2 atm-m^3)
Then we convert to L:
(15,586.2 atm-m^3)(1000 L/m^3)
= 15,586,200 atm-L
Then we convert to J:
(15,586,200 atm-L)(101.325 J / 1 atm-L)
= 1.579 x 10^9 J
I believe that the ice cube, being that it still has almost all of its properties, would still have a mass of 25 g after melting
