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alexandr1967 [171]
3 years ago
12

The ionic charge of an element in Group 6A is 2–. -True -False

Chemistry
1 answer:
natita [175]3 years ago
4 0

True. These ions are of a 2- charge. Oxygen is an example. It will form a 2- charge if ionize.  

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Name two "Storage Polysaccharides" and two "Structural Polysaccharides"
Vsevolod [243]

Answer:

Examples of storage polysaccharides - <u>starch and glycogen</u> and structural polysaccharides - <u>cellulose and chitin</u>

Explanation:

Polysaccharides are the complex carbohydrate polymers, composed of monosaccharide units that are joined together by glycosidic bond.

In other words, polysaccharides are the carbohydrate molecules that give monosaccharides or oligosaccharides on hydrolysis.

The examples of storage polysaccharides are starch and glycogen. The examples of structural polysaccharides are cellulose and chitin.

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3 years ago
Help Please I'll mark Brainiest!
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3 years ago
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The importance of reproduction??
Arte-miy333 [17]
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Ten kilograms of R-134a fill a 1.595-m3 weighted piston-cylinder device at a temperature of −26.4°C. The container is now heated
Tju [1.3M]

Explanation:

The given data is as follows.

    Mass of refrigerant, m = 10 kg

  Volume of the refrigerant, V = 1.595 m^{3}

Formula for specific volume of the refrigerant is as follows.

        v = \frac{V}{m}

           = 0.1595 m^{3}/kg

So, at -26.4^{o}C specific volume will be within v_{f} and v_{g} and pressure is constant.

The fluid will be in super-heated state at temperature 100^{o}C and at T = -26.4^{o}C pressure 1 bar = 0.1 MPa.

According to super-heated tables, the specific volume is v = 0.30138 m^{3}/kg.

Hence, the final volume will be calculated as follows.

               V_{f} = v \times m

                         = 0.30138 m^{3}/kg \times 10 kg

                         = 3.0138 m^{3}

Thus, we can conclude that final volume of the R-134a is 3.0138 m^{3}.

7 0
3 years ago
Molecular weight of the NH3​
wel

Answer:

NH₃ = 17.03 g/mol

Explanation:

Molecular weight is calculated by adding the atomic mases of all the atoms present in a molecule.

Like in case ammonia three hydrogen atoms and one nitrogen atom are present.

1 H = 1.01 g/mol

1 N = 14 g/mol

NH₃ = 14 + (1.01×3)

NH₃ = 17.03 g/mol

5 0
3 years ago
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