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Deffense [45]
2 years ago
15

The diagram shows a plant cell.

Chemistry
2 answers:
Serga [27]2 years ago
7 0

Answer:

B. structure 2

Explanation:

It represents nucleus which is the brain of the cell

adelina 88 [10]2 years ago
3 0
B. structure 2
Explanation: the nucleus is like the head of the cell so it controls everything that goes on in there
You might be interested in
Suppose 0.708g of copper(II) acetate is dissolved in 50.mL of a 46.0mM aqueous solution of sodium chromate.
lisabon 2012 [21]

Answer:

The final molarity of acetate anion in the solution is 0.0046 moles

Explanation:

The balanced equation is

Cu(C₂H₃O₂)₂ + Na₂CrO₄ = CuCrO₄ + 2Na(C₂H₃O₂)

Therefore one mole of Cu(C₂H₃O₂)₂ react with one mole of Na₂CrO₄ to form one mole of CuCrO₄ and two moles of Na(C₂H₃O₂)

Mass of copper (II) acetate present = 0.708 g

Volume of aqueous sodium present = 50 mL

Molarity of sodium chromate = 46.0 mM

Therefore

Number of moles of sodium chromate present = (50 mL/1000)×46/1000 = 0.0023 M

Number of moles of copper (II) acetate present = 181.63 g/mol

number of moles of copper (II) acetate present = (0.708 g/181.63 g/mol) =0.0039 moles

Therefore 0.0039 moles of Cu(C₂H₃O₂)₂ × (2 moles of Na(C₂H₃O₂))/1 Cu(C₂H₃O₂)₂) = 0.00779 moles of Na(C₂H₃O₂)

also 0.0023 moles of Na₂CrO₄ × (2 moles of Na(C₂H₃O₂))/1 Na₂CrO₄) = 0.0046 moles of Na(C₂H₃O₂)

Therefore the Na₂CrO₄ is the limiting reactant and 0.0046 moles of Na(C₂H₃O₂) or acetate anion is formed

7 0
3 years ago
Why do all polar/polar and non polar/non polar mixtures dissolve when mixed together
sweet-ann [11.9K]

Answer:

\huge\blue{answer}

Because water is polar and oil is nonpolar, their molecules are not attracted to each other. ... Because water molecules are polar, they interact with the sodium and chloride ions. In general, polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes.

Explanation:

hope i helps u

6 0
3 years ago
In Part A, you found the number of moles of product (1.80 mol P2O5 ) formed from the given amount of phosphorus and excess oxyge
n200080 [17]

Answer:

1.40 moles.

Explanation:

The balanced chemical equation for the reaction of Phosphorus and Oxygen is as follows -

4P + 5O_2 = 2P_2O_5

In Part A, the oxygen was taken in excess. So Phosphorus will be the limiting reagent.

Since, 2 moles of P_2O_5 is formed by 4 moles of P

So, for 1.8 moles of  P_2O_5 amount of required moles of P = \frac{4}{2} \times 1.80 = 3.60

In Part B, the phosphorus was taken in excess so oxygen will be the limiting reagent.

Since, 2 moles of P_2O_5 is formed by 5 moles of oxygen

So, for 1.40 moles of P_2O_5 moles of O_2 required = \frac{5}{2} \times 1.40 = 3.50

Thus as of now we have 3.60 moles of P_2O_5 and 3.50 moles of O_2.

As in the reaction of formation of P_2O_5, oxygen is the limiting reagent.

So the moles of P_2O_5 formed by the 3.50 moles of oxygen will be

P_2O_5 = \frac{2}{5} \times 3.50 = 1.40 moles.

5 0
3 years ago
A 4o kg skier starts at the top of a 12 meter high slope at the bottom she is traveling 10 m/s how much energy does she lose to
allsm [11]
I think the answer is b because that is true 
5 0
4 years ago
An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 2.0 ml. The height of the w
GuDViN [60]

Answer:

The density of the stone whose mass is 25 g and its volume is 5 mL is 5 g/mL.

We have a graduated cylinder holding a volume of water equal to 2 mL. After a stone is added, the height of the water rose to 7 mL. The volume of the stone is equal to the difference in the levels of water.

The stone has a volume of 5 mL and a mass of 25 g. Its density, that is the ratio of the mass to the volume, is:

The density of the stone whose mass is 25 g and its volume is 5 mL is 5 g/mL.The density of the stone is 5 g/cm³.

Mass = 25 g

Volume = 7 mL – 2 mL = 5 mL = 5 cm³

Density = mass/volume = 25 g/5 cm³ = 5 g/cm³

Explanation:

8 0
3 years ago
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