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3 years ago

Complete the sentence: Cellular respiration occurs ________________.

Chemistry

2 answers:

choli [55]3 years ago

6 0

Answer:

in plant and animal cells

Zielflug [23.3K]3 years ago

3 0

Answer:

In plant and animal cells

Explanation:

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Calculate the molecular formula of a compound with the empirical formula C5H11 and a molar mass of 142.32 grams/mole

MA_775_DIABLO [31]

Relative formula mass C₅H₁₁ = 71

Now divide the molar mass by the RFM = 142.32 / 71 = 2

Now C₍₅ₓ₂₎H₍₁₁ₓ₂) = C₁₀H₂₂

Hope that helps

6 0

3 years ago

Suppose you have a mixture of copper sulfate (CuSO4) and azulene (C10H8, you may wish to know the structure of azulene). Both co

iVinArrow [24]

Answer:

Aqueous layer (1 M HCI)

Explanation:

First of us I want to remind you of the cliché in chemistry that like dissolves like. In solvent extraction, a mixture is dissolved in a system consisting of two immiscible solvents. One layer is organic while the other layer is aqueous.

Polar substances partition in the aqueous layer while nonpolar substances partition in the organic layer.

Since Copper sulfate is ionic, we will find it in the aqueous layer according to the old chemistry cliche.

3 0

3 years ago

The surface tension of water is 7.28 ✕ 10−2 J/m2 at 20°C. Predict whether the surface tension of heptane would be higher or lowe

stira [4]

Answer:

Lower

Explanation:

Surface tension occurs because molecules at the surface do not have molecules above them, so they cohere more strongly to their neighbours.

The stronger cohesive forces make it more difficult to move an object through the surface than when it is beneath the surface.

The attractive forces in water are strong because of hydrogen bonding.

A hexane molecule is nonpolar, so the only attractions are the weak London dispersion forces.

The cohesive forces at the surface are much lower than those in water, so the surface tension of hexane is lower than that of water at the sane temperature.

3 0

3 years ago

Can someone show me a step by step with the answer?

Georgia [21]

Answer:

6 mols HCl

Explanation:

(I'm an AP chemistry student but not perfect at this stuff)

you can use the Molarity=Moles/L equation here:

(6M)=(moles HCl)/(1L)

divide by 1 on both sides to isolate the moles of HCl

this gets you 6 moles HCl.

Again I'm just a student so my answer might be wrong, but this question should just require the M=mols/L equation :).

8 0

3 years ago

1.Why mixture of stone pebbles and water is considered a suspension? Write few properties of the suspension. How suspension diff

sergey [27]

Explanation:

1.A mixture of stone, pebbles, and water is an example of a suspension. Because the particle size is more than 1000nm.

Properties of suspensions:

Suspension is a heterogeneous mixture. The constituents of the mixture are clearly visible.

The particle size will be more than 1000nm. If the suspension is left undisturbed then the particles will settle down.

Properties of Colloids:

Whereas in colloidal solutions, the particle size is in between 1nm-1000nm.

The particles will never settle down in colloid.

They show the Tyndall effect.

2.The solubility of salt at 20^oC is 30. That means the maximum amount of salt that is present in 100 g of water is 30 g.

If the temperature of a saturated solution is increased then, its solubility increases or decreases based on the nature of the solute.

For example if we take sodium chloride salt ,then its solubility is not effected by the change in temperature.

For cerium sulphate salt if temperature increases, then its solubility in water decreases.

For sugar (sucrose) its solubility increases with increase in temperature.

8 0

3 years ago