Answer:
1.1178 g
Explanation:
The product of volume and density is mass:
(2.3 cm^3)(0.486 g/cm^3) = 1.1178 g
_____
It would be a very unusual piece of metal that would float higher in water than most kinds of wood. The given "metal" at (0.486) has less than 3/4 the density of birch (at 0.67), which is a pretty light wood.
The table below shows some information about four different elements.
Element
Classification
Density (g/cm³)
barium (Ba)
metal
3.6
beryllium (Be)
metal
1.8
chromium Cr)
metal
7.2
phosphorus P)
nonmetal
1.8
A cube of an unknown element has a shiny, silvery color. The side of the cube measures 2.0 cm and the cube has a mass of 14.56 g.
Based on the information in the table, which element makes up the cube?
barium
beryllium
chromium
phosphorus
Answer:
beryllium
Explanation:
how do cultures form?
Explanation:
Human cultures, as communities of individuals, form when boundaries begin to occur within such communities, and when, through both adaptive and neutral mechanisms, the traits of each community—from language to decoration to technology—begin to diverge.
Societies are formed of our social groupings at varied levels, from small towns, through countries, to broader cultural groupings such as a Western society. Within such societies people tend to form particular cultures, formed of the ideas, customs, and social behaviors that make one society distinct from another.
A 237g sample of molybdnum metal is heated to 100.1 0C and then dropped into an insulated cup containing 244 g of water at 10.0 0C. If the final temperature of the water and metal in the cup is 15.3 0C, then what is the specific heat of molybdenum?
Answer:
The specific heat of molybdenum is 0.254 joules per gram-Celsius.
Explanation:
We consider the system formed by the molybdenum metal and water as our system, a control mass inside an insulated cup, that is, a container that avoids any energy and mass interactions between system and surroundings.
From statement we notice that metal is cooled down whereas water is heated. According to the First Law of Thermodynamics, we know that:
[tex]Q_{metal} - Q_{water} = 0[/tex]
[tex]Q_{metal} = Q_{water}[/tex]
Where:
[tex]Q_{water}[/tex] - Heat received by water, measured in joules.
[tex]Q_{metal}[/tex] - Heat released by metal, measured in joules.
Now we expand this identity by definition of sensible heat:
[tex]m_{metal}\cdot c_{metal}\cdot (T_{m,o}-T) = m_{water}\cdot c_{water}\cdot (T-T_{w,o})[/tex]
The specific heat of the metal is cleared within equation above:
[tex]c_{metal} = \frac{m_{water}\cdot c_{water}\cdot (T-T_{w,o})}{m_{metal}\cdot (T_{m,o}-T)}[/tex]
If we know that [tex]m_{water} = 0.237\,kg[/tex], [tex]m_{metal} = 0.244\,kg[/tex], [tex]c_{water} = 4186\,\frac{J}{kg\cdot ^{\circ}C}[/tex], [tex]T_{w,o} = 10\,^{\circ}C[/tex], [tex]T_{m,o} = 100.10\,^{\circ}C[/tex] and [tex]T = 15.30\,^{\circ}C[/tex], the specific heat of molybdenum is:
[tex]c_{metal} = \frac{(0.237\,kg)\cdot \left(4186\,\frac{J}{kg\cdot ^{\circ}C} \right)\cdot (15.30\,^{\circ}C-10\,^{\circ}C)}{(0.244\,kg)\cdot (100.10\,^{\circ}C-15.30\,^{\circ}C)}[/tex]
[tex]c_{metal} = 254.119\,\frac{J}{kg\cdot ^{\circ}C}[/tex]
The specific heat of molybdenum is 0.254 joules per gram-Celsius.
GOLF BALL PROPERTIES 1. Gabriel uses these numbers to find the density of the golf balls. Water has a density of 1.0 g/cm3. Which ball will float? (D = m/V) Ball Mass (g) 22 18 Volume (cm) 20 20 a) Ball A b) Ball B c) Ballc d) Ball D 30 OA 20 20 33
Answer:
ball B
Explanation:
Ball B with a density of 0.9 g/cm³ will float in water.
Option B is the correct answer.
What is density?Density is mass per unit volume.
Its unit is given as g/cm³.
We have,
The density of Ball A.
= 22 g / 20 cm³
= 1.1 g/cm³
The density of Ball B.
= 18 g / 20 cm³
= 0.9 g/cm³
Now,
Since the density of water is 1.0 g/cm³,
The ball that will float is the one with a density of less than 1.0 g/cm³.
Therefore,
Ball B with a density of 0.9 g/cm³ will float in water.
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Use your periodic table to answer the following questions. Pay attention to the spelling of the element names and make sure to write the chemical symbols correctly. 1. What metal is found in the group 1 and period 4? __________________ 2. What metalloid is found in the group 16 and period 5? ______________ 3. What nonmetal is found in the group 17 and period 2? ______________ 4. In what group will you find copper? ____________________ 5. In what group will you find krypton? ____________________ 6. In what group will you find mercury? _______________________ 7. What is the symbol for chlorine? ___________________ 8. What is the symbol for lead? _____________________ 9. What is the symbol for tungsten? ______________________ 10. What is the symbol for antimony? _______________________ 11. What is the symbol for sodium? ______________________ 12. In what period will you find gold? __________________________ 13. In what period will you find silver? _________________________ 14. In what period will you find oxygen? _________________________ 15. In what groups will you find metalloids? ______ ______ _____ _____ 16. What element has the symbol H? _______________________ 17. What element has the symbol He? _______________________ 18. What element has the symbol Ca? ________________________ 19. What element has the symbol Co? ________________________ 20. What element has the symbol C?
Explanation:
1. K (Potassium)
2. Te (Tellurium)
3. F (Flourine)
4. group 11, period 4
5. group 18, period 4
6. group 12, period 6
7. Cl
8. Pb
9. W
10. Sb
11. Na
12. period 6, group 11
13. period 5, group 11
14. period 2, group 16
15. Groups 13–16 of the periodic table contain one or more metalloids
16. Hydrogen
17. Helium
18. Calcium
19. Cobalt
20. Carbon
1. K (Potassium)metal is found in the group 1 and period 4.
2. Te (Tellurium) metalloid is found in the group 16 and period 5.
3. F (Flourine)nonmetal is found in the group 17 and period 2.
4. Group 11, period 4 group will you find copper.
5. Group 18, period 4 group will you find krypton.
6. Group 12, period 6 group will you find mercury.
7. Cl is the symbol for chlorine.
8. Pb the symbol for lead.
9. W the symbol for tungsten.
10. Sb is the symbol for antimony.
11. Na is the symbol for sodium.
12. Period 6, group 11 period will you find gold.
13. Period 5, group 11 period will you find silver.
14. Period 2, group 16 of the periodic table contain one or more metalloids.
15. Groups 13–16 groups will you find metalloids.
16. Hydrogen element has the symbol H.
17. Helium element has the symbol He.
18. Calcium element has the symbol Ca.
19. Cobalt element has the symbol Co.
20. Carbon element has the symbol C.
What is mixture and compound?In chemistry mixture is a combination of two or more different chemical elements which are not chemically bond. A mixture is the physical combination of two or more elements in which their individual identities are retained and it also mixed by solutions, suspension and colloids.
In chemistry compound is combination of two or more different elements which are chemically bond. So compound is held by chemical bond. A compound can't be separate by physical separation and after the mixture you can't identified that it is compound or not.
Therefore, 1. K (Potassium)metal is found in the group 1 and period 4.
2. Te (Tellurium) metalloid is found in the group 16 and period 5.
3. F (Flourine)nonmetal is found in the group 17 and period 2.
4. Group 11, period 4 group will you find copper.
5. Group 18, period 4 group will you find krypton.
6. Group 12, period 6 group will you find mercury.
7. Cl is the symbol for chlorine.
8. Pb the symbol for lead.
9. W the symbol for tungsten.
10. Sb is the symbol for antimony.
11. Na is the symbol for sodium.
12. Period 6, group 11 period will you find gold.
13. Period 5, group 11 period will you find silver.
14. Period 2, group 16 of the periodic table contain one or more metalloids.
15. Groups 13–16 groups will you find metalloids.
16. Hydrogen element has the symbol H.
17. Helium element has the symbol He.
18. Calcium element has the symbol Ca.
19. Cobalt element has the symbol Co.
20. Carbon element has the symbol C.
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What is convention? (not politically)
Answer:
a way in which something is usually done, especially within a particular area or activity.
Explanation:
Find volume of an object with the mass of 7.9g in the density of 2.28g/ ml
Answer:
The answer is
3.46 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} [/tex]
From the question
mass = 7.9 g
density = 2.28 g/mL
The volume is
[tex]volume = \frac{7.9}{2.28} \\ = 3.46491228[/tex]
We have the final answer as
3.46 mLHope this helps you
The element gold has a consistent melting point and color regardless of the physical changes that it goes through. This identifies gold as what type of substance?
Group of answer choices
A mixture
A physical property
A pure substance
A compound
Answer:
C
Explanation:
The element gold has a consistent melting point and color regardless of the physical changes. This identifies gold as a pure substance. The correct option is C.
What are pure substances?Pure substances are those that are made up of only one type of atom, and nothing is mixed in these substances. They are only one type of particle. They have fixed mass and structure.
Gold is an element that has an atomic number of 79. It is a bright yellow colored and shiny metal. It is used to make an ornament, which is made by mixing other metal to it.
Elements and compounds are subclasses of pure substances. A material that solely contains one type or class of atom is said to be an element. Gold is a pure substance, it is made by one type of atom which is Aurum (Au).
Thus, the correct potion is C. A pure substance.
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Most of the energy used in the United States comes from
Answer:
Energy in the United States comes mostly from fossil fuels: in 2010, data showed that 25% of the nation's energy originates from petroleum, 22% from coal, and 22% from natural gas.
Explanation:
It is really self explanitory
Earth's gravitational potential energy: GPE = mgh = Gravity (9.81m/s2) Mass (kg) x Height (m) Kinetic energy: KE = mu? How do the mass and height of an object affect the gravitational potential energy? O A. Mass and height have the same effect on gravitational potential energy. O B. Mass has a greater effect than height on gravitational potential energy O C. Height has almost 10 times the effect on gravitational potential energy that mass has. D. Height has a greater effect than mass on gravitational potential energy.
Answer:
A
Explanation:
Earth's garvitational energy is directly proportinal to the mass and hight of a body. Thus mass and height have the same effect on gravitational potential energy.
What is gravitational potential energy ?Gravitational potential energy is the energy stored in a massive body relative to its position in gravitational field.
The gravitational potential energy of a massive body can be determined relative to the position of another body affected by gravity. As per the equation for gravitational potential energy i.e., Mgh, both height and mass of a body has equal influence on its gravity.
If and object falls from a large height it experience higher gravity. Similarly more massive body is largely affected by gravity.
Therefore, both mass and height have the same effect on gravitational potential energy
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For each image, select the state of matter represented.
Answer:
need image
Explanation:
The images most likely associated with this question are honey, salt, and oxygen. Honey is a liquid, salt is a solid, and oxygen is a gas.
(The pictures below are associated with this question.)
George washes dishes with a new scented dish soap. After washing the dishes, he thinks they
are cleaner using the new scented soap. What can he do to be sure that the new scented
dish soap cleans his dishes better than the old dish soap?
Hint: You will want to set up an experiment, think about all the variables.
1 point-answer attempted
2 points – set up experiment
2 points – correctly identified variables
Answer:
Please find the set up of the experiment below
Independent variable: DISH SOAP
dependent variable: Cleanliness of the dishes
Explanation:
In order for George to be sure that the new scented dish soap cleans his dishes better than the old dish soap, he will set up an experiment using the scientific method.
The scientific method has the following steps:
1) Ask a question: Every scientific experiment starts with a question. I'm this case, George will ask the question that: Does the new scented dish soap clean dishes better than the old dish soap?
2) Formulate a hypothesis: A hypothesis is a testable explanation to an asked question or observed problem. A hypothesis in this case will be: IF the new scented dish soap is used, THEN dishes will be cleaner.
3) Test hypothesis: A hypothesis is tested by conducting an experiment. In this experiment, George will compare the effect of the old dish soap to that of the new scented soap. He will wash a group of plates with the old dish soap and wash another group with the new scented soap. He will then compare how clean the groups of dishes are.
In this experiment, the INDEPENDENT VARIABLE, which is the variable George manipulates is the DISH SOAP while the DEPENDENT VARIABLE, which is the variable George measures is the CLEANLINESS OF THE DISHES.
The control group is the group of dishes washed with the old dish soap while the experimental group is the group of dishes washed with the new scented dish soap.
The control variables of this experiment can be the same type of plates, same color of plates, same type of food eaten with the dishes etc.
4. Conclusion: Concluding in an experiment involves accepting or rejecting the hypothesis depending on the outcome of the experiment. If the outcome aligns with the hypothetical statement, the hypothesis will be accepted but if otherwise, it will be rejected.
PLEASE ANSWER. True or false: An inference explains an observation.
Answer:
true
Explanation:
Answer:
True
Explanation:
Observation is objective while inference is subjective.
Which of the following compounds has the most deshielded protons?A) CH3ClB) CH3IC) CH3BrD) CH4
Given :
Some compounds :
[tex]A)\ CH_3Cl\ B)\ CH_3I\ C)\ CH_3Br\ D)\ CH_4[/tex] .
To Find :
Which of the following compounds has the most deshielded protons .
Solution :
Deshielded means nucleus whose chemical shift has been increased due to removal of electron density, magnetic induction, or other effects .
In simple words deshielding means the ability to shift protons .
Now , among Cl , I , Br and H . Cl is the most electron negative .
Therefore , deshielding will be more in [tex]CH_3Cl[/tex] .
Hence , this is the required solution .
The compound with the presence of most deshielded protons has been [tex]\rm \bold{CH_3Cl}[/tex]. Thus, option A is correct.
Diesheilded protons have been explained as the shift in the protons of the central atom with the bonding to a more electronegative element.
The electronegative element has been possessing the negative charge and is attracted to the positive charge.There has been a shift in the protons in the sample that has been resulted in the de-shielded protons.
In the given compounds, the anions bonded to the methyl groups are Cl, C, Br, and H. Among the following, the most electronegative atom has been chlorine.
Thus, the molecule of [tex]\rm \bold{CH_3Cl}[/tex] has been consisted of the most de-shielded protons. Thus, option A is correct.
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Hot coffee with sugar (completely dissolved) is classified as?
How much fluid from the 1:5 dilution has to be transferred to the second microcentrifuge tube containing 900 L buffer to prepare a 1:50 dilution? a. 200 ML b. 100 ML c. 10 ML d. 50 ML
Answer: i think it's d 50 ML
Explanation:
100 mililiters of the 1 : 5 dilution must be transferred to the second microcentrifuge tube containing 900 mililiters buffer to prepare a 1 : 50 dilution. (Correct answer: B)
Reminder - The question has a typing mistake, correct form is presented below:
"How much fluid from the 1 : 5 dilution has to be transferred to the second microcentifuge tube containing 900 mL buffer to prepare a 1 : 50 dilution?"
We can estimate the quantity of the 1 : 5 dilution by means of the Principle of Mass Conservation and definition of Concentration, which are represented by the following expression:
[tex]c_{1}\cdot V_{1} = c_{2} \cdot V_{2}[/tex] (1)
Where:
[tex]c_{1}[/tex] - Initial concentration, in units solute to unit solution.[tex]c_{2}[/tex] - Final concentration, in units solute to unit solution.[tex]V_{1}[/tex] - Initial volume of solution, in mililiters.[tex]V_{2}[/tex] - Final volume of solution, in mililiters.If we know that [tex]c_{1} = \frac{1}{5}[/tex], [tex]V_{1} = x[/tex], [tex]c_{2} = \frac{1}{50}[/tex] and [tex]V_{2} = x + 900[/tex], then the amount to be transferred to the buffer is:
[tex]\frac{1}{5} \cdot x = \frac{1}{50}\cdot (x+900)[/tex]
[tex]10\cdot x = x + 900[/tex]
[tex]9\cdot x = 900[/tex]
[tex]x = 100[/tex]
100 mililiters of the 1 : 5 dilution must be transferred to the second microcentrifuge tube containing 900 mililiters buffer to prepare a 1 : 50 dilution. (Correct answer: B)
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For the following reaction, 8.00 grams of silicon tetrafluoride are allowed to react with 7.40 grams of water. silicon tetrafluoride (s) + water (l) hydrofluoric acid (aq) + silicon dioxide (s) What is the maximum amount of hydrofluoric acid that can be formed? grams What is the FORMULA for the limiting reagent? H2O What amount of the excess reagent remains after the reaction is complete? grams
Answer:
For the following reaction, 8.00 grams of silicon tetrafluoride are allowed to react with 7.40 grams of water. silicon tetrafluoride (s) + water (l) hydrofluoric acid (aq) + silicon dioxide (s) What is the maximum amount of hydrofluoric acid that can be formed? grams What is the FORMULA for the limiting reagent? H2O What amount of the excess reagent remains after the reaction is complete? grams
The pKa of a weak acid can be determined from its titration curve.a. Trueb. False
Answer:
a. True
Explanation:
Yes, the titration curve can determine or can reveal the pKa value of a weak acid.
Titration is a scientific method to estimate the dissolved substance concentration, known as the titrand, in a known volume when it reacts with another chemical substance of known volume as well as concentration. The other substance is known as Titrant.
When a weak acid like acetic acid is titrated to a very strong base such as NaOH, the titration curve is obtained and the pH value is noted. But the titration curve of any weak acid shows a characteristic shape. At the end of titration, the acetic acid will convert into acetate ions.
pKa is the negative logarithm of the Ka of the acid. pKa is the pH of the acid where the concentration of the weak acid as well as the conjugate base is in equimolar concentration.
Given the following Kb values, which cation is the strongest acid?
Base Kb
NH3 1.8 x 10-5
C2H5NH2 5.6 x 10-4
C5H5N 1.7 x 10-9
C8H10N4O2 5.3 x 10-14
(NH2)2CO 1.5 x 10-14
A. NH4+.
B. C2H5NH3+.
C. C5H6N+.
D. [C8H11N4O2]+.
E. [NH2NH3CO]+.
Answer:
The correct option is E
Explanation:
Generally the a base with the highest [tex]K_b[/tex] is the strongest base and from the data given
[tex]C_2H_5NH_2[/tex] has the highest value of [tex]K_b[/tex] so [tex]C_2H_5NH_2[/tex] is the strongest base while [tex](NH_2)_2CO[/tex] has the lowest value of [tex]K_b[/tex] so [tex](NH_2)_2CO[/tex] is the weakest base
Generally the conjugate acid of a weak base is always a strong acid
So
For [tex](NH_2)_2CO[/tex] which the weakest base it conjugate acid which is [tex][NH_2NH_3CO]^+[/tex] will be the strongest acid
oxygen.
5. What role do chloroplasts and chlorophyll play in a plant cell?
Answer each part below.
A. Which organism labeled in this food web provides energy, either directly or indirectly, to all of the other organisms? Explain why this is your answer.
B. Explain why the amount of food available to the slug population might increase if the aphid population decreased.
Answer:
A- producers provide energy to all of the other organisms. they directly supply energy to primary consumers (animals who eat plants). They indirectly supply energy to other consumers by feeding the animals that they eat. The energy gets transferred from the producers to the primary consumers, to the secondary consumers, and to the tertiary consumers.
B- aphids and slugs both eat producers. if the aphid population decreases, there will be less competition for the slugs to eat the their food.
Which complex ion can exhibit geometric isomerism? Assume that M is the metal ion, A and B are ligands, and the geometry is octahedral. a) [MA.12+ b) [MAB]2+ c) [MA4B2]2+ d) [MA3B312+
Answer:
[MA4B2]2+
Explanation:
Octahedral species are species that has a coordination number of of six. This means that six ligands are attached to the central metal atom/ion.
For any octahedral specie to exhibit geometrical or cis-trans isomerism, it must have the formula EX2Y4 as in [MA4B2]2+, hence the answer above.
What is the best way to make sure an experiment is precise?
The compound P4S3 is used in matches and reacts with oxygen through the chemical reaction shown below.
What mass of SO2 is produced from the combustion of 0.200 g P4S3?
P4S3 (s) + ------- O2 (g) ===> ------------ P4O10(s) + ----- SO2 (g)
Answer:
[tex]m_{SO_2}=0.175gSO_2[/tex]
Explanation:
Hello,
In this case, since the first step is to write the properly balanced chemical reaction:
[tex]P_4S_3 (s) + 8O_2 (g)\rightarrow P_4O_{10}(s) + 3SO_2 (g)[/tex]
We can see that given the 0.200 g of P4S3 (molar mass 220 g/mol) the mole ratio between it and SO2 (molar mass 64 g/mol) is 1:3, therefore, the produced mass of SO2 turns out:
[tex]m_{SO_2}=0.200gP_4S_3*\frac{1molP_4S_3}{220gP_4S_3} *\frac{3molSO_2}{1molP_4S_3} *\frac{64gSO_2}{1molSO_2} \\\\m_{SO_2}=0.175gSO_2[/tex]
Best regards.
2. Can the "facts” of science change over time? If so, how
Answer:
Yes
Explanation:
Some scientific facts are still under investigation of why it is true or not;i.e, science made us to believe that human evolution first started in the Sahara of East Africa which we don't know if it's true or not, but that's what the scientists said. And as of present days the new generations of scientists are still trying to testify if the facts are true, so it might change once their researches proved another facts differ from what we were taught.
K₂SO₄(aq) + SrI₂(aq) → 2KI(aq)+ SrSO₄(s) net ionic equation
Answer:
SO4 (aq) + Sr (aq) >> SrSO4 (s)
Explanation:
K+1 SO4-2 + Sr +2 I2- >> sK +1
(you dont separate and write down the ions for Sr SO4 because its a solid)
Cancel out the same ions from both sides and write down what your left with.
Are all molecules of a particular substance alike?
Answer:
Yes.
Explanation:
Yes, all molecules of a particular substance are similar or alike if the substance has similar shape and structure. Molecule is made up of two or more atoms having no charge on them and the atoms present in it make bonds with each other. For example, water is made of similar molecules i. e. two hydrogen atom and one oxygen atom bonded together with a covalent bond.
Element (20X) in the periodic table exist in:
It occurs in oxygen I think
A chef is testing out new iron cookware. He knows that iron has a specific heat of
445 J/kg°C. He heats a 2 kg iron skillet on stove for 5 minutes and finds that the
temperature of the iron skillet has increased by 250°C. What change in
temperature will the Chef observe when he heats his 4 kg iron skillet on the same
stove for the same amount of time?
A. An increase of 125°C
B. An increase of 250°C
C. An increase of 325°C
O D. An increase of 445°C
He knows that iron has a specific heat of 445 J/kg°C. He heats a 2 kg iron skillet on stove for 5 minutes and finds that the temperature of the iron skillet has increased by 250°C An increase of 250°C change in temperature will the Chef observe when he heats his 4 kg iron skillet on the same stove for the same amount of time.
What is specific heat ?Specific heat can be defined as the measurable amount of heat needed to increase the temperature of one gram of a substance by one degree Celsius of temperature.
The units of specific heat can be represented as calories or joules per gram per Celsius degree where as 1 calorie per gram per Celsius degree.
Specific heat capacity= Heat quantity/ mass × change in temperature.
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The density of lead, which has the FCC structure, is 11.36 . The atomic weight of lead is 207.19 . Use Avogadro's number: 6.02210. Calculatethe lattice parameter(Enter your answer to three significant figures.) = 2.75*10^21 the atomic radius of lead(Enter your answer to three significant figures.) =
Answer:
a
[tex]a_o = 4.95 *10^{-8} \ cm [/tex]
b
[tex]r = 1.7500 * 10^{-8} \ cm[/tex]
Explanation:
From the question we are told that
The density of lead is [tex]\rho_l = 11.36 \ g/cm^3[/tex]
The atomic weight is [tex]M_w = 207.19 \ g/mol[/tex]
The Avogadro's number is [tex]N_a = 6.022 * 10^{23} \ \frac{atom}{mol}[/tex]
Generally for FCC the number of atom is n = 4
Generally the volume of a unit FCC cell is mathematically represented
[tex]V = \frac{n * M_w }{N_a * \rho_l }[/tex]
[tex]V = \frac{4 * 207.19 }{ 6.022 * 10^{23} * 11.36 }[/tex]
[tex]V = 1.211 5 *10^{-22} \ cm^3[/tex]
Generally the lattice parameter is mathematically represented as
[tex]a_o = \sqrt[3]{V } [/tex]
[tex]a_o = \sqrt[3]{1.211 5 *10^{-22} } [/tex]
=> [tex]a_o = 4.95 *10^{-8} \ cm [/tex]
Generally the radius of the lead is mathematically represented as
[tex]r = \frac{a_o * \sqrt{2} }{4}[/tex]
=> [tex]r = \frac{4.95 *10^{-8} * \sqrt{2} }{4}[/tex]
=> [tex]r = 1.7500 * 10^{-8} \ cm[/tex]
