The answer is “C“ since the earth rotation makes it seem like the stars and sun is moving when in reality we are moving ฅ^•ﻌ•^ฅ
Answer:
radical-initiated
Explanation:
Radical-initiated polymerization is unpredictable and difficult to control. The reaction proceeds indiscriminately and produces shortened chains, loops, and branches that create holes in the polymer. This reduces its mass to volume ratio.
Urricanes<span> act as giant heat engines, so it is logical to assume that an </span>increase<span> in sea surface temperatures (SSTs) will make more intense </span>hurricanes<span>. Indeed, there is a general consensus among </span>hurricane<span> scientists that an </span>increase<span> in SSTs due to global warming, should, in theory, lead to more intense </span>hurricanes<span>.</span>As the storm gets stronger, it gets rounder and the eye begins to form. Really stronghurricanes<span> have very clear round eyes like the one in this picture. The most intense winds in a </span>hurricane are in the thunderstorms that form the eyewall. Tropical cyclones strengthen when all of the conditions are right for them.
Answer:
0.271 M NO₃⁻
Explanation:
To find the molarity of the nitrate ion (NO₃⁻), you need to (1) convert grams to moles (via molar mass), then (2) convert moles Al(NO₃)₃ to moles NO₃⁻, then (3) convert mL to L, and then (4) calculate the molarity. When (Al(NO₃)₃) dissolves in water, it dissociates into 3 nitrate ions. The final answer should have 3 sig figs.
(Steps 1 + 2)
Molar Mass (Al(NO₃)₃): 26.982 g/mol + 3(14.007 g/mol) + 9(15.998 g/mol)
Molar Mass (Al(NO₃)₃): 212.985 g/mol
1 Al(NO₃)₃ = 1 Al³⁺ and 3 NO₃⁻
6.25 g Al(NO₃)₃ 1 mole 3 moles NO₃⁻
------------------------- x ----------------- x ----------------------- = 0.0880 moles NO₃⁻
212.985 g 1 mole Al(NO₃)₃
(Steps 3 + 4)
325.0 mL / 1,000 = 0.3250 L
Molarity = moles / volume
Molarity = 0.0880 moles / 0.3250 L
Molarity = 0.271 M
