Answer:
5.0 × 10²⁴ molecules
Explanation:
Step 1: Write the balanced double displacement reaction
2 NaOH + CuSO₄ ⇒ Na₂SO₄ + Cu(OH)₂
Step 2: Calculate the moles corresponding to 5.0 × 10²⁴ molecules of Na₂SO₄
We will use Avogadro's number: there are 6.02 × 10²³ molecules in 1 mole of molecules.
5.0 × 10²⁴ molecule × 1 mol/6.02 × 10²³ molecule = 8.3 mol
Step 3: Calculate the moles of CuSO₄ required to produce 8.3 moles of Na₂SO₄
The molar ratio of CuSO₄ to Na₂SO₄ is 1:1. The moles of CuSO₄ required are 1/1 × 8.3 mol = 8.3 mol.
Step 4: Calculate the molecules corresponding to 8.3 moles of CuSO₄
We will use Avogadro's number.
8.3 mol × 6.02 × 10²³ molecule/1 mol = 5.0 × 10²⁴ molecule
Phase change from gas to solid which is called condensation
Explanation:
If a substance loses heat in changing from water vapor, the process is called condensation. Water exists in the three states of matter which are solid, liquid and gas.
- When ice, the solid form of water gains heat, it melts to form liquid water and the phase change process is called melting.
- When the melt water is boiled, it changes to water vapor with the appropriate input of thermal energy and the change process is called boiling.
- In going back from gaseous water vapor to liquid, heat is removed in a process called condensation.
Learn more:
condensation:brainly.com/question/4794280
#learnwithBrainly
Answer:
2.35 × 10⁵ J
Explanation:
<em>Renatta Gass is out with her friends. Misfortune occurs and Renatta and her friends find themselves getting a workout. They apply a cumulative force of 1080 N to push the car 21,800 cm to the nearest fuel station. Determine the work done on the car.</em>
Step 1: Given data
- Force applied on the car (F): 1080 N
- Distance traveled by the car (d): 21,800 cm
Step 2: Convert "d" to meters
We will use the conversion factor 1 m = 100 cm.
21,800 cm × 1 m/100 cm = 218 m
Step 3: Calculate the work done (W)
We will use the following expression.
W = F × d
W = 1080 N × 218 m = 2.35 × 10⁵ J
I think the answer is B because Sound travels about 1,500 m/s underwater, and sound travels about 332 m/s in air. Sound underwater travels faster and longer in water. The particles are more tightly packed together, so sounds travel faster through water.
Answer:
Atomic radius Increases in groups from top to bottom and decrease in period from left to right.
Explanation: