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Nesterboy [21]
3 years ago
13

The PC modem was invented in what year?​

Chemistry
1 answer:
Andrew [12]3 years ago
5 0

Answer:

1977

Explanation:

Getting connected: a history of modems. Then, in 1977, Dale Heatherington and Dennis Hayes created the world's first PC modem, the 80-103A.

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Solutions can be composed of:
Anika [276]

A solution may exist in any phase so your answer is D. any of the above

hope this helps :)

7 0
4 years ago
Gloria is writing the chemical formula for a compound using its chemical name. She has just identified the names of the elements
disa [49]
She will use the periodic table of elements to not only find out the chemical symbols of the elements written within the name, but also to check whether or not the elements are metals and or nonmetals, from this determine the ionic charges if needed for metals, and for metals that have more than one ionic charge, use a Roman numeral to represent the ionic charge that she would be using in writing the chemical formula of the compound.
5 0
4 years ago
Read 2 more answers
The image above shows sodium and chloride ions in solution. Which label in the diagram represents the chloride ion?
g100num [7]

Answer:

Label A

Explanation:

Hope this helps:)

5 0
3 years ago
A 0.35 g sample of Li(s) is placed in an Erlenmeyer flask containing 100 mL of water at 25°C. A balloon is placed over the mouth
Harrizon [31]

Answer:

C- Using a 0.35 g sample of Li(s) cut into smaller pieces will increase the rate of reaction

C- Equal quantities of gas will be produced with potassium K, used instead of Lithium, Li.

Explanation:

<u>First part</u>

When a metal is present in small pieces, the rate of the chemical reaction increases. This is due to small pieces provide more surface area for reaction than huge chunks of Li.

moles of reactant decreases product formation rate also decreases and temperature decreases rate also decreases so remaining option are wrong

<u>Second part </u>

2Li + 2H2O --------------> 2LiOH + H2

2K + 2H2O ---------------> 2KOH + H2  

Hence, both gives same quantity of gas

7 0
3 years ago
The naturally occurring isotopes of potassium are potassium-39, potassium-40, and potassium-41. Potassium-39 has an abundance of
LuckyWell [14K]

Answer:

39.099 amu

Explanation:

saw this on quizlet no cap sorry im 3 weeks late

8 0
3 years ago
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