That statement is false
There are other methods that people can for the speech other than memorizing it. Here are two methods that you can use :
- Preparing a text so you can conduct the speech by reading it.
- Preparing a couple of pointers in your hand to help you remember the important topics of the speech.
Answer:
Digital x-rays require less time, reduce radiation, and are cheaper.
:)
Answer:
Jennifer just received the results of her SAT exam.
Her SAT Mathematics score of 600 is in the 78th percentile.
It means there is 78% of test-takers has score equal or less than hers (or 22% of test-takers has score greater than hers)
Hope this helps!
:)
Answer:
d. All of these
Explanation:
A timeline can be defined as a graphical representation of a series of important events in order in which they have occurred i.e in a chronological or sequential order. Thus, a timeline shows the order of events from top to bottom or left to right, starting with the earliest and moving forward to the most recent (latest).
Generally, a timeline is typically considered to be a cause and effect graphic organizer due to the fact that it illustrates events in a chronological or sequential order, their place in history, and how these events are interrelated or led to another.
This ultimately implies that, timelines show;
a. The order of events.
b. An event’s place in history.
c. Why an event may have taken place.
<em>For example, a timeline can be used to show the order in which the various battles fought during the American Revolutionary War occurred. </em>
Answer:
B. CH₅N
Explanation:
The combustion reaction of a compound CₐHₓNₙ with O₂ is:
CₐHₓNₙ + O₂ → a CO₂ + X/2 H₂O + n NO₂
Where 1 mole of CₐHₓNₙ with an excess of O₂ produce a moles of CO₂, X/2 moles of H₂O and n moles of NO₂
Thus, you need to convert the mass of CO₂ and H₂O to moles to find the C:H ratio and determine a possible empirical formula thus:
Moles CO₂ (Molar mass 44g/mol):
44g ₓ (1mol / 44g) = 1 mole CO₂ = 1 mole C
Mole of H₂O (Molar mass 18g/mol):
45g ₓ (1 mol / 18g) = 2.5 moles H₂O = 5 moles H
Thus, in the compound you have 5 moles of H per mole of C, and a possible empirical formula is:
B. CH₅N
The only structure that meet this C:H ratio
