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Hatshy [7]
3 years ago
13

3. What does Letter X and Y represent?

Chemistry
1 answer:
Katarina [22]3 years ago
7 0
Y means families and are vertical (alkaline, alkaline earthmetals, halogens, transition metals, noble gases, etc)
x means periods andare horizontal (1,2,3,4,5)
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A 7.00-mL portion of 8.00 M stock solution is to be diluted to 0.800 M. What will be the final volume after dilution? Enter your
amm1812

Explanation:

The number of moles of solute present in liter of solution is defined as molarity.

Mathematically,         Molarity = \frac{\text{no. of moles}}{\text{Volume in liter}}

Also, when number of moles are equal in a solution then the formula will be as follows.

                     M_{1} \times V_{1} = M_{2} \times V_{2}

It is given that M_{1} is 8.00 M, V_{1} is 7.00 mL, and M_{2} is 0.80 M.

Hence, calculate the value of V_{2} using above formula as follows.

                    M_{1} \times V_{1} = M_{2} \times V_{2}

                 8.00 M \times 7.00 mL = 0.80 M \times V_{2}

                      V_{2} = \frac{56 M. mL}{0.80 M}

                                  = 70 ml

Thus, we can conclude that the volume after dilution is 70 ml.

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Bacteria that live around deep-sea hot-water vents obtain energy by oxidizing inorganic hydrogen sulfide belched out by the vent
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Answer:

<h2>chemoautotrophs</h2>

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Such types of bacteria that oxidize inorganic compounds to obtain energy and use carbon dioxide as a carbon source to synthesize their food are known as chemoautotrophs such as iron-oxidizing bacteria, cyanobacteria, sulfur-oxidizing bacteria and some other. Chemoautrophic mode of nutrition is a type of autotrophic nutrition in which organisms have the ability to synthesized their own food by using chemical energy in the place of solar energy. The organismS that use solar energy to synthesize their food are known as photoautotrophic organisms such as plants and some other organisms.

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Arrange the following molecules in order of increasing bond polarity (highest bond polarity at the bottom):
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NF3– 0.94– third
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NBr3—NCl3—NF3—CF4
Lowest. Highest
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A homogenous mixture that is mainly composed of water is referred to as a(n) __________ solution.
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Explanation:

.............

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bacteria is used by industries . Because some bacterias are very friendly

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