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alexgriva [62]
4 years ago
8

What is a harmful role of bacteria?

Chemistry
1 answer:
zzz [600]4 years ago
6 0

Answer:

sickness.

Explanation:

some bacterium cause sickness, kike a stomach bug.

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A gas exerts a pressure of 0.62 atm. Convert this to kPa and mmHg. Be sure to show your work.
IRINA_888 [86]

Answer:

The answer to your question is 0.62 atm = 62.82 kPa = 471.2 mmHg

Explanation:

Data

P = 0.62 atm

P = ? kPa

P = ? mmHg

Process

1.- Look for the conversion factor of atm to kPa and mmHg

 1 atm = 101.325 kPa

1 atm = 760 mmHg

2.- Do the conversions

                  1 atm ----------------- 101.325 kPa

                  0.62 atm ------------  x

                   x = (0,62 x 101.325) / 1

                  x = 62.82 kPa

                   1 atm ------------------ 760 mmHg

                   0.62 atm ------------  x

                   x = (0.62 x 760)/1

                   x = 471.2 mmHg                

4 0
4 years ago
Balance the following half-reaction: (acidic) VO2+(aq) → V3+(aq) Express your answer as a half-reaction. Identify all of the pha
ivolga24 [154]

Answer:

The balanced half reaction in an acidic medium is :

VO^{2+}(aq)+2H^+(aq)+e^-\rightarrow V^{3+}(aq)+H_2O(l)

Explanation:

VO^{2+}(aq)\rightarrow V^{3+}(aq)

While balancing the half-reaction in  an acidic medium, we will first balance oxygen atoms by adding water:

1) Adding 1 water molecule on product side to balance oxygen atoms.

VO^{2+}(aq)\rightarrow V^{3+}(aq)+H_2O(l)

Now balance hydrogen atom by adding H^+ ions.

2) Adding 2 hydrogen ions on reactant side to balance hydrogen atoms.

VO^{2+}(aq)+2H^+(aq)\rightarrow V^{3+}(aq)+H_2O(l)

Now balance the charge adding electrons on the side where positive charge is mor.

3) Adding 1 electrons on reactant side to balance charge of the overall reaction:

VO^{2+}(aq)+2H^+(aq)+e^-\rightarrow V^{3+}(aq)+H_2O(l)

The balanced half reaction in an acidic medium is :

VO^{2+}(aq)+2H^+(aq)+e^-\rightarrow V^{3+}(aq)+H_2O(l)

6 0
3 years ago
How can environmental science help you?​
alexandr402 [8]

Answer:

Organisms and humans depend on each other to get by. Environmental science is important because it enables you to understand how these relationships work.

For example, humans breathe out carbon dioxide, which plants need for photosynthesis. Plants, on the other hand, produce and release oxygen to the atmosphere, which humans need for respiration.

Animal droppings are sources of nutrients for plants and other microorganisms. Plants are sources of food for humans and animals. In short, organisms and humans depend on each other for survival.

Explanation:

5 0
3 years ago
According to the bohr model, what determines the shortest wavelength in a given series of wavelengths emitted by the atom?
algol13

According to the bohr model "The lower energy level into which the electron deflects from a higher energy level is designated by the quantum number nf" determines the shortest wavelength in a given series of wavelengths emitted by the atom.

By explaining that electrons move in fixed orbitals (shells) and not anywhere in between, Bohr theory amended the atomic structure model.

He also showed that each orbit (shell) has a fixed energy. Bohr refined Rutherford's model of the atom's nucleus to include electrons and their varying energy levels.

According to Rydberg formula

1/λ = R [1/ni² - 1/nf²]

λ = wavelength

R = Rydberg constant

ni & nf are integers or principal quantum numbers where nf > ni

So if we want wavelength(λ) to be shortest, then 1/nf should be zero.

In this way , it depends on nf and not on ni

That's why the lower energy level into which the electron deflects from a higher energy level is designated by the quantum number nf" determines the shortest wavelength in a given series of wavelengths emitted by the atom.

Learn more about Bohr's model here brainly.com/question/18002213

#SPJ4

4 0
2 years ago
What do all living things need to survive?
Vinil7 [7]

Answer:

air,water,and food.

Explanation:

Some animals need to obtain their energy from plants.

3 0
3 years ago
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