Answer:
(102 900 ÷ 12) + (170 × 1.27) = 8800
Step 1. Evaluate the expressions inside the parentheses (PEMDAS)
102 900 ÷ 12 = 8575
170 × 1.27 = 215.9
In multiplication and division problems, your answer can have no more significant figures than the number with the fewest significant figures.
Thus, the underlined digits are not significant, but we keep them in our calculator to avoid roundoff error.
Step 2. Do the addition (PEMDAS).
8575
+ 215.9
= 8790.9
Everything that you add to an insignificant digit gives an insignificant digit as an answer.
Thus, the underlined digits are not significant.
We must drop them and round up the answer to 8800.
Explanation:
Answer:
bromine will be replaced by fluorine.
Explanation:
lithium bromide LiBr2 is an ionic compoung splitting as Li2+ and Br-
therefore bromide ion is replaced by fluoride ion F-.
Answer:
An Arrhenius base is a compound that increases the OH − ion concentration in aqueous solution. The reaction between an Arrhenius acid and an Arrhenius base is called neutralization and results in the formation of water and a salt.
Explanation:Hope this helps :)
Degree celsius is not an official si unit of measure.
Answer : The correct option is, cobalt.
Explanation :
Magnet : It is defined as a type of material which produces the magnetic field. Or we can say that a material that has the property of attracting an iron piece and producing the magnetic field.
The elements iron, cobalt and nickel are usually used in the making of magnets.
Hence, the element used to make magnets is, Cobalt.
