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Nimfa-mama [501]
3 years ago
8

Help asap please i’m really struggling

Chemistry
1 answer:
Nostrana [21]3 years ago
6 0

Answer:

1.95

Explanation:

you get the molar mass of the hydrogen then, n=m/Mr that is 3.90/2

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Four friends wrote down descriptions of snow and sleet.
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Answer:

Hi there! After reading each of these descriptions of snow and sleet, I believe that Brad's description is the most accurate and complete. Alanna seems to be describing snow and hail, Candace has not provided an accurate description of snow, and Jim's description is completely inaccurate. Brad provides the best description.

I hope this helps you! Take care and have a great day - Mani :)

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3 years ago
When the wedges are removed, the cars will move. Predict which direction they will move and when they will stop.
timofeeve [1]

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4 years ago
When a reaction occurs between atoms with ground state electron configuration 1s2 2s1 and 1s2 2s2 2p5 the predominant type of bo
fenix001 [56]

Answer: The bond formed between the elements will be ionic bond.

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Element 2: 1s^22s^22p^5

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For these elements, there will be a complete transfer of electron from Element 1 to Element 2. Hence, this will form a ionic bond.

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5 0
3 years ago
During an experiment vinegar was added to baking soda. The following observations were recorded.
harina [27]

Answer:

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4 0
3 years ago
The alchemical, medical, and technological traditions were precursors to chemistry. State a contribution that each made to the d
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Alchemy was a form of early chemistry that aimed to transmute base metals into gold and to create an elixir of longevity or eternal life.

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Major contributions to health care have been made possible by chemistry. The development of new drugs involves chemical analysis and synthesis to form new compounds.

Chemistry contributes to the preparation of materials for surgery (sutures, artificial skin, and sterile materials). The sutures used in many surgeries today do not have to be removed, because they simply dissolve in the body after a period of time. Replacement blood vessels for heart and other types of surgery are often made of chemicals that do not react with the tissues, so they will not be rejected by the body and this was made possible with the help of the chemistry.

Chemistry in technologies:

The Iron Age, saw the prevalence of iron increase as the major metal of choice for cutting tools and weapons. Iron was slower to evolve as a material because it required higher temperatures to work the metal. This shift saw a change in smelting practices, improved furnace technologies, and also the development of forging, as opposed to the casting techniques used in the Bronze Age.

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To know more about Alchemy, refer to this link:

brainly.com/question/5997100

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