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Artyom0805 [142]
2 years ago
7

Can anyone help giving 5 stars

Biology
2 answers:
anyanavicka [17]2 years ago
4 0
The answer is the function of living things are composed of cells
Alexxx [7]2 years ago
4 0

Answer:

I think that it's the 2nd option

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What is needed for work to be done?
Andrews [41]

Answer:

the third option

Explanation:

8 0
3 years ago
Read 2 more answers
How many grams are NaCl are required to prepare 200 mL of a 3.10 M solution?
rodikova [14]

The mass (in grams) of NaCl required to prepare the solution is 36.27 g

<h3>What is molarity?</h3>

Molarity is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

<h3>How to determine the mole of NaCl</h3>
  • Volume = 200 mL = 200 / 1000 = 0.2 L
  • Molarity = 3.1 M
  • Mole of NaCl =?

The mole of NaCl in the solution can be obtained as follow:

Molarity = mole / Volume

Cross multiply

Mole = Molarity x Volume

Mole of NaCl = 3.1 × 0.2

Mole of NaCl = 0.62 mole

<h3>How to determine the mass of NaCl </h3>

We can obtain the mass of NaCl needed to prepare the solution as follow:

  • Molar mass of NaCl = 58.5 g/mol
  • Mole of NaCl = 0.62 mole
  • Mass of NaCl = ?

Mole = mass / molar mass

Cross multiply

Mass = mole × molar mass

Mass of NaCl = 0.62 × 58.5

Mass of NaCl = 36.27 g

Learn more about molarity:

brainly.com/question/15370276

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6 0
2 years ago
True or False: Earthquakes, Volcanoes, mid ocean ridges, deep sea trenches all occur at the edge of the plates or boundaries
Svetradugi [14.3K]

Answer:

so i wanna say ... true?

Explanation:

Most of the Earth's geologic activity takes place at plate boundaries. At a divergent boundary, volcanic activity produces a mid ocean ridge and small earthquakes. At a convergent boundary with at least one oceanic plate, an ocean trench, a chain of volcanoes develops and many earthquakes occur.

3 0
3 years ago
Read 2 more answers
Give several advantages to passive solar heating uses and active solar system applications
Rina8888 [55]

Answer:A material designed to produce passive solar energy can achieve energy savings of 70%. In addition to this great advantage, we show you what are the main benefits that passive solar energy can bring us:

Reduced maintenance cost. Since it has no external equipment to harness the energy, the maintenance required will be practically nil.

It is 100% renewable energy. It does not emit polluting gases and helps to maintain the environment, in addition to being an inexhaustible source which is the sun and we can always have it.

Energy and economic savings.  

Reduction in the cost of electricity and gas bills.  

Compatible with solar panel installations. In fact, it is currently considered as a complementary technology.  

APPLICATIONS :Active solar energy is mainly used to obtain sanitary hot water, heating systems and to transform solar radiation into electrical energy.

Active solar technology is also used to produce air currents for ventilation or cooling and to store heat for later use. In any of these processes, the use of pumps and fans is required.

Other uses of active solar energy are:

Water purification.

Drying.

Evaporation.

Distillation.

Solar batteries.

Solar chargers.

Energy for street lighting, traffic signals and roads.

6 0
3 years ago
An object in motion will stay in motion until when A) until a balanced force acts on it B) until an unbalanced force acts on it
jenyasd209 [6]
Until a force in equilibrium acts on it
6 0
3 years ago
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