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DochEvi [55]
3 years ago
7

What is starchelement compound or mixture

Chemistry
1 answer:
adelina 88 [10]3 years ago
7 0
Starch is a compound.
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Calculate the mass in grams of each of the following using dimensional analysis:
Mashutka [201]

The mass in grams of each of the following using dimensional analysis is:

  • 6.02 x 10²³ atoms of Mg = 12g of Mg
  • 3.01 x 10²³ formula units of CaCl2 = 55.5g of CaCl2
  • 12.4 x 10¹⁵ molecules of formaldehyde (CH2O) = 0.000000618g of formaldehyde

<h3>How to calculate mass?</h3>

The mass of a substance can be calculated in different ways depending on whether molecules or moles are given.

First, we need to convert atoms/formula units/molecules to moles as follows:

  • 6.02 × 10²³ ÷ 6.02 × 10²³ = 1 mole of Mg
  • 3.01 x 10²³ ÷ 6.02 × 10²³ = 0.5 moles of CaCl2
  • 12.4 x 10¹⁵ ÷ 6.02 × 10²³ = 2.06 × 10-⁸ moles of formaldehyde

Next, we convert each mole value to mass as follows:

  • 1 mole of Mg = 1 × 12 = 12g of Mg
  • 0.5 moles of CaCl2 = 0.5 × 111 = 55.5g of CaCl2
  • 2.06 × 10-⁸ moles of CH2O = 0.000000618g of formaldehyde

Learn more about mass at: brainly.com/question/19694949

#SPJ1

3 0
2 years ago
a population of cacti in the Sonoran desert all need to get water what type of dispersion will they most likely show A. they wil
Yuri [45]

Answer:

Your answer is A. They will show even dispersion to get water.

Explanation:

3 0
4 years ago
Read 2 more answers
Which is a resource that the National Park Service manages?
pantera1 [17]

Answer:

to preserve the integrity of the wildlife refuge, ecosystems and the endangered species.

Explanation:

A national park service manages

4 0
3 years ago
Is the following compound symmetrical going across?
Nataliya [291]

Answer:

Yes

Explanation:

A molecule has a center of symmetry when, for any atom in the molecule, an identical atom exists diametrically opposite this center an equal distance from it(Wikipedia).

A center of symmetry is said to exist in a molecule when reflection of all parts of the molecule through the center of symmetry produces an indistinguishable configuration(Housecroeft and Sharpe,2012)

Obviously, the Cl2 molecule has a center of symmetry, hence it is symmetrical. Reflection of the molecules through its center of symmetry produces an indistinguishable configuration.

7 0
3 years ago
A sample of sulfurous acid (H2SO3) has a mass of 1.31 g.
lakkis [162]

Answer:

a) 2 (H+) ions

b) 1 (SO3²-) ions

c) 1.36 × 10^-22 grams.

Explanation:

According to this question, sulfurous acid has a chemical formula; H2SO3. It is made up of hydrogen and sulfite ion. Hydrogen ion (H+) is the cation while sulfite ion (SO32-) is the anion.

Based on the chemical formula, there are 2 moles of hydrogen ions that reacts with 1 mole of sulfite ion as follows:

2H+ + SO3²- → H2SO3

Hence;

- there are 2 hydrogen ions (2H+) present in H2SO3.

- there is 1 sulfite ion (SO3²-) present in H2SO3.

c) The mass of one formula unit of H2SO3 is calculated thus:

= 1.008 (2) + 32.065 + 15.999(3)

= 2.016 + 32.065 + 47.997

= 82.08 a.m.u

Since, 1 gram is = 6.02 x 10^23 a.m.u

82.08 a.m.u = 82.08/6.02 × 10^-23

= 13.6 × 10^-23

= 1.36 × 10^-22 grams.

6 0
3 years ago
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