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3 years ago

If 240.0 g NaOH reacts, how many grams of Cu(OH)2 should precipitate out in the reaction? Show work

Chemistry

1 answer:

algol [13]3 years ago

8 0

Answer:

292.7 g

Explanation:

Note: the reaction is missing but I looked it up on the web and found it.

Step 1: Write the balanced equation

CuSO₄(aq) + 2 NaOH(aq) → Cu(OH)₂(s) + Na₂SO₄(aq)

Step 2: Calculate the moles corresponding to 240.0 g of NaOH

The molar mass of NaOH is 40.00 g/mol.

240.0 g × 1 mol/40.00 g = 6.000 mol

Step 3: Calculate the moles of Cu(OH)₂ formed from 6.000 moles of NaOH

The molar ratio of NaOH to Cu(OH)₂ is 2:1. The moles of Cu(OH)₂ formed are 1/2 × 6.000 mol = 3.000 mol.

Step 4: Calculate the mass corresponding to 3.000 moles of Cu(OH)₂

The molar mass of Cu(OH)₂ is 97.56 g/mol.

3.000 mol × 97.56 g/mol = 292.7 g

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The reaction of sodium peroxide and water produces sodium hydroxide and oxygen gas. The following balanced chemical equation rep

a_sh-v [17]

Answer:

3.925 mol.

Explanation:

From the balanced equation:

2 Na₂O₂(s) + 2 H₂O(l) → 4 NaOH(s) + O₂(g) ,

It is clear that 2 moles of Na₂O₂ react with 2 moles of H₂O to produce 4 moles of NaOH and 1 mole of O₂ .

Using cross multiplication:

4 moles of NaOH produced with → 1 mole of O₂ .

15.7 moles of NaOH produced with → ??? mole of O₂ .

∴ The no. of moles of O₂ made = (1 mole)(15.7 mole)/(4 mole) = 3.925 mol.

8 0

4 years ago

Look at the image shown

klemol [59]

Answer:

b) Linear molecule with two domains

Explanation:

The image represents a linear molecule with two domains.

The compound shown here is carbon dioxide in which a central carbon atom is surrounded by two oxygen atoms.

This bond geometry is of the type AX₂
In this linear molecule the bond angle is a perfect 180°
The lone pairs are perfectly balanced out and will not cause distortion of the central carbon.

5 0

3 years ago

elect all statements that correctly describe the stability of eclipsed and staggered conformers. Multiple select question. Stagg

alisha [4.7K]

Staggered conformers are lower in energy than eclipsed conformers , Option A is the right answer.

<h3>What are Eclipsed and Staggered Confirmation ?</h3>

The arrangement of atoms in molecule such that the dihedral angle formed is 60 degree is called Staggered Conformation and the arrangement of atoms in which the dihedral angle is 0 degree is called Eclipsed Confirmation

Among the given statements

The statement that best describe the stability of Staggered Conformers and eclipsed conformers is Staggered conformers are lower in energy than eclipsed conformers .

To know more about Eclipsed and Staggered Confirmation

brainly.com/question/27852131

#SPJ1

4 0

2 years ago

Circle the correct one from given alternatives.

mash [69]

Answer:

24 is the correct anwer

this the anwer text this u no

3 0

2 years ago

Read 2 more answers

. How much energy is lost by a 30.0g sample of water that decreases in temperature from 56.7C to 25.0C?

lbvjy [14]

Answer:

Q = -3980.9 j

Explanation:

Given data:

Mass of sample = 30 g

Initial temperature = 56.7 °C

Final temperature = 25 °C

Specific heat of water = 4.186 j/g.°C

Amount of heat released = ?

Formula:

Q = m.c.ΔT

Q = heat released

m = mass of sample

c = specific heat of given sample

ΔT = change in temperature

Solution:

ΔT = T2 -T1

ΔT = 25 °C - 56.7 °C = - 31.7°C

Q = m.c.ΔT

Q = 30 g × 4.186 j/g.°C × - 31.7°C

Q = -3980.9 j

8 0

3 years ago