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1 year ago

Which of the following is not a nanoscale object?

Chemistry

2 answers:

Mekhanik [1.2K]1 year ago

7 0

Answer:

The correct answer will be option-A muscle cell.

Explanation:

Nanoscales are the structures less than 100 nm in length which is considered a billionth of a meter scale. The nanoscales lead to the formation of a new field of study called nanotechnology which finds its use in all perspectives of science.

In the given question, the nanoscale objects are enzymes (3-7) nm) length, the water molecule (0.275 nm), and xenon atom. Since the muscle cell length is usually measured in mm(1-40 mm)

Thus, option-A is the correct answer.

KiRa [710]1 year ago

6 0

If I am correct I would believe that it would be a muscle cell.

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f 23.6 mL of 0.200 M NaOH is required to neutralize 10.00 mL of a H3PO4 solution , what is the concentration of the phosphoric a

Eduardwww [97]

Answer:

Explanation:

H3PO4(aq) + 3NaOH(aq) → Na3PO4(aq) + 3H2O(l)

mole of NaOH = 23.6 * 10 ⁻³L * 0.2M

= 0.00472mole

let x be the no of mole of H3PO4 required of 0.00472mole of NaOH

3 mole of NaOH required ------- 1 mole of H3PO4

0.00472mole of NaOH ----------x

cross multiply

3x = 0.0472

x = 0.00157mole

[H3PO4] = mole of H3PO4 / Vol. of H3PO4

= 0.00157mole / (10*10⁻³l)

= 0.157M

<h3>The concentration of unknown phosphoric acid is 0.157M</h3>

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1 year ago

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Consider the elements in the periodic table. The stair-step line between the pink squares and the yellow squares separates the _

Maru [420]

I believe the correct answer from the choices listed above is option B. The stair-step line between the pink squares and the yellow squares separates the metals <span>from the nonmetals. Hope this answers the question. Have a nice day.</span>

4 0

2 years ago

Read 2 more answers

Samantha is using a lever to lift a rock. To life the rock most easily, where should she apply force to the lever

Inessa [10]

Answer:

On the opposite side of the rock.

Explanation:

6 0

2 years ago

A titration is performed to determine the amount of sulfuric acid, H2SO4, in a 6.5 mL sample taken from car battery. About 50 mL

Orlov [11]

Answer: The molar concentration of sulfuric acid in the original sample is 1.943 M

Explanation:

To calculate the molarity of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is $H_2SO_4$

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is NaOH.

We are given:

$n_1=2\\M_1=?\\V_1=56.5mL\\n_2=1\\M_2=0.5824M\\V_2=43.37mL$

Putting values in above equation, we get:

$2\times M_1\times 56.5=1\times 0.5824\times 43.37$

$M_1=0.2235$

Now to calculate the molarity of original solution:

$M_1\times 6.5=0.2235\times 56.5$

$M_1=1.943$

Thus the molar concentration of sulfuric acid in the original sample is 1.943 M

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2 years ago

aleksA sailor on a trans-Pacific solo voyage notices one day that if he puts of fresh water into a plastic cup weighing , the cu

finlep [7]

Answer:

40 g

See explaination

Explanation:

Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces.

Check attachment for the detailed step by step solution of the given problem.

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1 year ago