In a 6.43E1 g sample of NaHCO, how many grams of sodium are present? Use two decimal places in atomic masses. Only give the numeric value of your answer. Don’t include the units.

Q: Providing the electron with energy enables it to be emitted from the surface of the metal with equal...

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Q: Predict the product and draw the reaction mechaniem of Me frolow ng conj. addition reactions: B.1. C...

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Q: Name the highlighted chemical group in each molecule. Lewis structure name of highlighted group :N=C...

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Q: Atomic theory

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Q: What are the products of the following decomposition? Ni(CIO3)2 + -->

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Q: GIVEN: - 500mg of ascorbic acid - 2L of distilled water - 7.5% m/v (this is the stock solution) ...

A: A numerical problem based on concentration terms that is to be accomplished.

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Q: 1.96 g H2 is allowed to react with 9.67 g N2, producing 1.98 g NH3. Part A What is the theoretical y...

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Q: Name trie ighlighted chemical group in each molecule. Lewis structure name of highlighted group H H ...

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Q: 0.10 mol weak acid HCNO is dissolved in 1.00 L H2O I. α CNO- II. α HCNO   a) I > II b) I = II ...

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Q: What would you expect to a substance melting to a liquid phase or subliming to a gas at 1 atm and ro...

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Q: Consider 4.40 LL of a gas at 365 mmHgmmHg and 20. ∘C∘C . If the container is compressed to 2.40 LL a...

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Q: Calculate the molarity of an acetic acid (FW 60,052) solution if 25 mL of this solution is neutraliz...

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Q: for benzene, c6h6, the freezing point constant, Kp is 5.12 K kg mol^-1 and its normal freezing point...

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Q: A penny has a mass of 2.50 g and the Moon has a mass of 7.35 × 104“ kg. Use this information to answ...

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Q: For a reaction of A + B → C with a rate equation of Rate = k[A][B], what is the rate order? Select o...

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Q: a- Accordingly, which one of the two students got th more accurate results ? b- Mention the technica...

A: Percentage of impurities in Na2CO3 = 20 % Percentage Purity of Na2CO3 = 80 %     Mass of Na2CO3 diss...

Q: Examine the following equation: C + 02 CO2 Is this a oxidation-reduction reaction? Provide an explan...

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Q: Fatty acids are stored in the body as triglicerides in adipose tissues. Consider the oxidation react...

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Q: MULTIPLE CHOICE. Read and understand the questions below. Choose the letter of your answer 1. Which ...

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Q: 5. Cadmium (Cd) is a heavy metal which has a leaching rate of about 0.0012 mg/L per year. Consider a...

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Q: AL+ KOH +H20- >KAL(OH)y + Hz 7.07 H, C204 2 H2Q- He C Oy Hz Cz Ou C204?+KAL (OH), K, AL(c Ou), z H20...

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Q: Aluminum hydroxide can be dissolved in hydrochloric acid to form aluminum chloride and water. Write ...

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Q: When octane is combusted with inadequate oxygen, carbon monoxide may form. If 100 g of octane is bur...

A: Given: Mass of octane = 100 g. And mass of oxygen = 200 g.  

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Q: reagents for other Rh antigens

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Q: 4.17 Phosgene is a highly toxic gas that has been used as a chem- ical weapon at times in the past. ...

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Q: IR spectra (KBr disc) LOD D 4800 3000 2000 1000 500 MAVENUNB ERI l

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Q: Calculate the mass of diphosphorus pentoxide (P,O,) that contains a million (1.0 × 10°) phosphorus a...

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Q: In a 1.196E2 g sample of iron(III) oxide, how many grams of iron are present

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Q: Ammonia (NH,) gas and oxygen (0,) gas react to form nitrogen (N,) gas and water (H,O) vapor. Suppose...

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Q: 9. What observations in the gold foil experiment made Rutherford conclude that atoms are mostly empt...

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Q: Triphenylmethanol LAB Q 3. Why is HCl added

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Q: Suggest some ways that the dipoles in London forces are different from the dipoles in dipole-dipole ...

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Q: H. Combustion Reactions are Redox Reactions C3H3(g) + 5 0,(g) → 3 CO,(g) + 4 H20(g)

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Q: Prepare 1500mL of 0.5N H2SO4 solution with specific gravity of 1.84g/mL and assay of 97%

A: Given Volume of solution = 1500ml  Normality = 0.5 N Specific gravity = 1.84 g/ ml % solution = 97

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A: Answer for the example is given below :

Q: Give four uses of Ethane and Pentane each.

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Q: 1. From the following data find the instantaneous rate at 6 minute. 5.0 Time 3 5.1 7.6 10.2 13.3 (mi...

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Q: of LDA A LA achivator 6 Tidy Aldal- Tischenks Cl mol) (2 mol>

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Q: OH Calculate the percentage purity of naproxen (FW 230.26) from the following data. 210.7 mg of napr...

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Q: 1. Ethane gas, C:H6, burns in air (i.e reacts with oxygen in air ) to form carbon dioxide and water:...

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Q: What’s is Bonding

A: Given,  Bonding 

Q: Draw the expanded structural formula of an organic compound with sixteen carbons using the following...

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Q: No. of No. of Atomic Isotopic A. Element Isotope mass (u) abundance (3 decimal places) protons neutr...

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Q: What is the moles to mole ratio of ag to cu in my lab?

A: Given: Reaction between Ag+ from AgNO3 and Cu metal.  

Q: Calculate the mass of diphosphorus pentoxide (P,0,) that contains a million (1.0 × 10°) phosphorus a...

A: One mole of substance contain   6.022×1023   atoms

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.