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3 years ago

What is the product of the first beta decay in this series?

Chemistry

1 answer:

Anarel [89]3 years ago

8 0

Answer:

Explanation:

In beta decay the nucleus loses a neutron and gains a proton. The mass therefore remains constant but the atomic number increases by one.

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Which element would be the most reactive with K? Br, Na, Ar, or O? And how do you know?

kykrilka [37]

Ar I did this I think i got it right on edunuty

5 0

3 years ago

Micronutrients can be classified based on the presence of ______ in their chemical structures. According to this classification

natali 33 [55]

Answer:

Carbon

Explanation:

Micronutrients include elements or groups needed by the body in order to survive. These elements or groups include vitamins and minerals. Micronutrients can be divided into four categories:

1. water-soluble vitamins

2. Fat-soluble vitamins

3. Macrominerals

4. Trace minerals

8 0

2 years ago

Read 2 more answers

Dan bikes 10 km west and then bikes another 5 km west. What is Dan's

777dan777 [17]

C

This is because 10+5=15
15/45=0.3

4 0

2 years ago

6. A 25.0-mL sample of potassium chloride solution was found to have a mass of 25.225 g.

Morgarella [4.7K]

Answer:

6. a. 5.53 (m/m) %; b. 0.7490M

7. 0.156M

Explanation:

6. In the solution of KCl, there are 1.396g of KCl in 25.225g of solution. As mass/mass percent is:

Mass solute / Mass solution * 100

The mass/mass percent of KCl is:

a. 1.396g KCl / 25.225g solution * 100

5.53 (m/m) %

b. Molarity is moles of solute per liters of solution:

Moles KCl -Molar mass: 74.55g/mol-:

1.396g KCl * (1mol / 74.55g) = 0.018726 moles KCl

Volume in liters: 25mL = 0.025L

Molarity:

0.018726 moles KCl / 0.025L = 0.7490M

7. 0.90% means 0.90g of NaCl in 100g of solution:

Moles NaCl -Molar mass: 58.44g/mol-:

0.90g NaCl * (1mol / 58.44g) = 0.0154 moles NaCl

Volume in Liters:

100g * (1mL / 1.01g) = 99mL = 0.099L

Molarity:

0.0154 moles NaCl / 0.099L =

0.156M

4 0

2 years ago

Which model demonstrates a correct pathway carbon takes in the carbon cycle?

weqwewe [10]

Answer:

C) atmosphere → plants → animals → soil

Explanation:

The third choice provides the correct path through which carbon is cycled in nature.

Carbon passes from the atmosphere to plants then to animals and finally to the soil.

Plants uses carbon dioxide from the atmosphere to manufacture their food.
The food is made up of giant carbon chains which also provides nourishment for animals.
When animals digest plant matter, they obtain energy for their process.
The waste is passed into the soil .

8 0

3 years ago