PLEASE HELP!
Newton’s first law of motion was a giant leap forward in scientific thought during Newton’s time. Even today, the idea is sometimes difficult at first for people to understand.
Which statement is the best example of an object and motion that would make it hard for people to accept Newton’s first law?
A rolling ball eventually slows down and comes to a stop.
A wagon must be pushed before it begins to move.
The heavier the load in a cart, the harder the cart is to turn.
A box does not move when pushed equally from opposite sides.
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Ответ:
A rolling ball eventually slows down and comes to a stop
Ответ:
2.44*10²³ Br atoms.
Explanation:
To solve this problem we need to calculate the number of moles of CH₂Br₂ in 35.2 g.
Molar mass of CH₂Br₂ = 12 + 1*2 + 2*79.9 = 173.8 g·mol⁻¹35.2 g / 173.8 g·mol⁻¹ = 0.2025 mol CH₂Br₂
Now we use Avogadro's number to calculate the number of Br atoms in 0.2025 moles of CH₂Br₂, keeping in mind that there are 2 Br atoms for each CH₂Br₂ molecule:
0.2025 mol CH₂Br₂ *
2.44*10²³ Br atoms