Answer: Physical change
Explanation: Quite simple as the starfish opening a clam would mean the starfish is physically changing the clams look.
Answer:
The model cannot show how light bends.
Explanation:
Answer:
24.9 L Ar
General Formulas and Concepts:
<u>Atomic Structure</u>
- Reading a Periodic Table
- Moles
- STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K
<u>Aqueous Solutions</u>
<u>Stoichiometry</u>
- Using Dimensional Analysis
Explanation:
<u>Step 1: Define</u>
[Given] 40.0 g Ar
[Solve] L Ar
<u>Step 2: Identify Conversions</u>
[PT] Molar Mass of Ar - 39.95 g/mol
[STP] 22.4 L = 1 mol
<u>Step 3: Convert</u>
- [DA] Set up:

- [DA] Divide/Multiply [Cancel out units]:

<u>Step 4: Check</u>
<em>Follow sig fig rules and round. We are given 3 sig figs.</em>
24.9235 L Ar ≈ 24.9 L Ar
Answer: it should be c or b
Explanation:
(P1V1=nRT1)/(P2V2=nRT2)
Constant temperature → (P1V1)/(P2V2)
688 mm Hg → 0.905 atm
994 mm Hg → 1.30789 atm
500.2 mL → 0.5002 L
(P1V1)/(P2V2)
(0.905)V1/(1.30789)(0.5002)
V1 = 0.72288 L → 722.88 mL