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solong [7]
3 years ago
15

Help me pleaseeeeee​

Chemistry
1 answer:
katrin [286]3 years ago
5 0

Answer:

Arthropod (3)

Annelids (2)

Cnidarians (1)

Echinoderms (4)

Explanations:

I hope all this helps if u don't understand it let me know.

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According to the following reaction, how many grams of calcium sulfate will be formed upon the complete reaction of 30.1 grams o
gtnhenbr [62]

Answer:

55.32 g of CaSO₄.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

H₂SO₄ + Ca(OH)₂ —> CaSO₄ + 2H₂O

Next, we shall determine the mass of Ca(OH)₂ that reacted and the mass of CaSO₄ produced from the balanced equation. This can be obtained as follow:

Molar mass of Ca(OH)₂ = 40 + 2(16 + 1)

= 40 + 2(17)

= 40 + 34

= 74 g/mol

Mass of Ca(OH)₂ from the balanced equation = 1 × 74 = 74 g

Molar mass of CaSO₄ = 40 + 32 + (16×4)

= 40 + 32 + 64

= 136 g/mol

Mass of CaSO₄ from the balanced equation = 1 × 136 = 136 g

SUMMARY:

From the balanced equation above,

74 g of Ca(OH)₂ reacted to produce 136 g of CaSO₄.

Finally, we shall determine the mass of CaSO₄ produced by the reaction of 30.1 g of Ca(OH)₂. This can be obtained as follow:

From the balanced equation above,

74 g of Ca(OH)₂ reacted to produce 136 g of CaSO₄.

Therefore, 30.1 g of Ca(OH)₂ will react to produce = (30.1 × 136)/74 = 55.32 g of CaSO₄.

Thus, 55.32 g of CaSO₄ were obtained from the reaction.

7 0
3 years ago
Repetition of decorative styles or lines?
pshichka [43]

Answer:

D

Explanation:

5 0
3 years ago
Consider the chemical equation in equilibrium.
djverab [1.8K]

Answer:

The forward reaction will be favored.

Explanation:

The reaction is:

2H_{2}(g)+2O_{2}(g)--->2H_{2}O(g)

As per equation (equilibrium equation), there are two moles of gaseous molecules on product side and three moles of reactant side.

a) If we increase pressure, the volume will decrease.

b) Due to decrease in volume, the moles per unit volume will increase.

c) In order to attain equilibrium again, the system will shift in the direction where it can nullify this effect [Le Chatelier's principle]

d) This can be done, if system moves in the direction where number of moles of gaseous molecules are less, which is product side.

e) Thus forward reaction will be favored.

4 0
3 years ago
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Check out this long-form version of the periodic table. It shows where the two rows of
MatroZZZ [7]

Answer:

The long form version is too wide to easily fit on a computer screen or sheet of paper

Explanation:

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1. Publishing work in journals
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