Answer:
The answer is C
Explanation:
She should make the parachutes smaller in order to decrease the drag forces on the car and bring it to a stop 400 meters after crossing the finish line.
The correct answer is false. Not only one type of balance is present in a laboratory. Most laboratory I've worked into owns two types of balance namely the analytical balance and the top-loading balance. The former is used for accurate mass readings and those needs smaller amounts of a substance while the latter is used for approximation and large amounts of substances.
Answer:
The correct answer is option B.
Explanation:
When we increase number of molecules of reactant frequency of the molecular collision increases due to which effective collision between reactant molecules to form a product also increases, With this overall rate of the reaction increases.
Where as:
When we increase the temperature of the reactant molecules increase in average kinetic energy of the molecules is observed.
When we increase the activation energy of the reaction rate of the reaction slows down,
Answer:
234 g
Explanation:
We know we will need a balanced equation with masses and molar masses, so let’s gather all the information in one place.
M_r: 22.99 58.44
2Na + Cl₂ ⟶ 2NaCl
Mass/g: 92.0
1. Calculate the <em>moles of Na
</em>
Moles Na = 92.0 × 1/22.99
Moles Na = 4.002 mol Na
===============
2. Calculate the <em>moles of NaCl
</em>
The molar ratio is 2 mol NaCl:2 mol Na.
Moles of NaCl = 4.002 × 2/2
Moles of NaCl = 4.002 mol NaCl
===============
3. Calculate the <em>mass of NaCl
</em>
Mass of NaCl = 4.002 × 58.44
Mass of NaCl = 234 g
I believe this is correct! :D
