Which of the following units could be used for the average speed of an object? A. kilometers per hour (km/hr) B. miles per hour
1 answer:
Answer : The correct option is, (D) all of these
Explanation:
Average speed : It is defined as the ratio total distance to total time. It is a scalar quantity that means it is defined by the magnitude only.
Formula used :
The common units of average speed are miles per hour (mph), kilometers per hour (kph), meters per second (m/s), or feet per second (ft/s).
The S.I unit of average speed is meter/second (m/s).
Hence, all of the units could be used for the average speed of an object.
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In the reaction between 1 molecule of bromine and 2 molecules of potassium chloride, there are six atoms in the products.
Let's consider the balanced equation for the reaction between 1 molecule of bromine and 2 molecules of potassium chloride. This is a single replacement reaction.
Br₂ + 2 KCl ⇒ 2 KBr + Cl₂
We obtain as products, 2 molecules of potassium bromide and 1 molecule of chlorine.
- 1 molecule of KBr has 2 atoms, so 2 molecules contribute with 4 atoms.
- 1 molecule of Cl₂ has 2 atoms.
- The 4 atoms from KBr and the 2 atoms from Cl₂ make a total of 6 atoms.
In the reaction between 1 molecule of bromine and 2 molecules of potassium chloride, there are six atoms in the products.
Learn more: brainly.com/question/21850455
