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Lady_Fox [76]
2 years ago
13

What is the purpose of the source? Is the article current? (The main purpose of the source could be documenting scientific resea

rch, reporting news, providing entertainment, or marketing products. A current article is one that was published in the recent past.)
Chemistry
1 answer:
Mariana [72]2 years ago
7 0
As a debate kid, the purpose of the source is to provide evidence on a point. You are proving that your point matters by giving a piece of evidence that supports what you’re trying to say. Without evidence your claim isn’t impactful.
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exis [7]
2.5 moles of silver is 269.6705 grams
4 0
2 years ago
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How well did tossing the pennies simulate half lives?
SSSSS [86.1K]
Its a 50% chance that approx 1/2 of the pennies will land on tails. The next toss will result the same. and so on and so on. showing how a reaction would slowly eliminate 1/2 of the remaining lives per reaction, until nothing is left. I think it is a good stimulation.
5 0
3 years ago
Match the following numbers with the correct number of significant digits they possess. Answers may repeat. (4 points)
mezya [45]

(B. 3) 172 All nonzero digits are significant.

(A. 4) 450.0 x 10^3 Trailing zeroes after the decimal point are significant.

(A. 4) 3427 All nonzero digits are significant.

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(C. 5) 2205.2 Zeroes between nonzero digits are significant.

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8 0
3 years ago
What are the columns on the periodic table called?
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Families are another names for the columns
8 0
2 years ago
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Balance the following reaction: AL2O3 + HCI ⇒ ALCI3 + H2O
Anastaziya [24]
To balance the following chemical equation, make a tally or a count of each of the atoms on both sides of the reaction, and make sure that those atoms are equal on both the reactant and product side.

AL2O3 + HCl => ALCl3 + H2O

Left side. Right side
AL = 2. AL = 1
O = 3 Cl = 3
H = 1. H = 2
Cl = 1. O = 1

First balance the metal atoms, aluminum, then hydrogen and then oxygen.

Balanced equation :
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Left side. Right side
AL = 2 AL = 2
O = 3 Cl = 6
H = 6 H = 6
Cl = 6 O = 3.

4 0
3 years ago
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