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Studentka2010 [4]
3 years ago
14

Choose the correct statement regarding the relative size of atoms:

Chemistry
1 answer:
Sonbull [250]3 years ago
6 0

Answer:

The atoms on left side are larger than the atoms on the right side of the periodic table because those on the right have more proton's.

Explanation:

As we travel along a period in a periodic table then the atomic radii decreases

This is because as we travel along a period we have that the atomic number of the atoms increases which means the the number of proton's increased

But the electron's add to the same outer shell throughout the period , which means the effective nuclear charge increases which pulls the outer electrons toward's the nucleus and the size decreases.

Therefore the atoms on left side are larger than the atoms on the right side of the periodic table because those on the right have more proton's.

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A solution was made by dissolving 5.10 mg of hemoglobin in water to give a final volume of 1.00 ml. the osmotic pressure of this
Assoli18 [71]

The molecular weight of hemoglobin can be calculated using osmotic pressure

Osmotic pressure is a colligative property and it depends on molarity as

πV = nRT

where

π = osmotic pressure

V = volume = 1mL = 0.001 L

n = moles

R = gas constant = 0.0821 L atm / mol K

T = temperature = 25°C = 25 + 273 K = 298 K

Putting values we will get value of moles

moles=\frac{\pi V}{RT}=\frac{0.00195X0.001}{0.0821X298}mol

we know that

moles=\frac{mass}{molarmass}

Therefore

molarmass=\frac{mass}{moles}=\frac{5.10X10^{-3}g}{7.97X10^{-8}}=6.399X10^{4}g

5 0
3 years ago
11.You and a friend find a rusty wire coat hanger near the
gtnhenbr [62]

Answer:

because he would've not known properly about it!

7 0
2 years ago
How many electrons are in the nucleus of an aluminum atom?
DaniilM [7]

Answer:

13

Explanation:

4 0
2 years ago
Read 2 more answers
What are the three types of Carbohydrates?
Doss [256]

The major classes are monosaccharides, oligosaccharides and polysaccharides.

The types are sugar, starch, and fibersugar.

Hope I helped!!

3 0
3 years ago
How many moles are in 4.67 x 10^26 atoms of Iron?
TiliK225 [7]

Answer:

<h2>775.75 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{4.67 \times  {10}^{26} }{6.02 \times  {10}^{23} }   \\  = 775.747508...

We have the final answer as

<h3>775.75 moles</h3>

Hope this helps you

4 0
3 years ago
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