What is the oxidation number of O in P2O5 What is the oxidation number of K in K2CrO4 What is the oxidation number of S in Al2(SO4)3

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Q: Find the acidity when 5. is added NaOH ml of Calculate the pH value when titrated between 25 ml of…

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Q: How many MILLILITERS of lactic acid and GRAMS of sodium lactate must be added to 1L of water to…

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Q: Define and explain the following terms in relation to ionic compounds: lattice enthalpy, enthalpy of…

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Q: C) Flames play an essential role in atomic absorption spectroscopy. Briefly, but informatively,…

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Q: Calculate the pH value when titrated between 25 ml of weak acid HA concentration of 0.3 (104 x 6.6…

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Q: 7. Identify the polyatomic cation:

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Q: Alex’s mass before getting the tattoo was 61.5 kg.  The tattoo contains 5.20x1023 molecules of iron…

A: Given, Alex’s mass before the tattoo = 61.5 kg  tattoo contains 5.20x1023 molecules of Fe3O4

Q: Question 29 Which of the following atoms has the greatest electron affinity Ga

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Q: How long would it take to deposit 50.0 mg Cu at the cathode of an electrolysis cell containing 6.0 M…

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Q: SiH2F2 geometry and molecular model

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Q: The molecular weight of NaOH  is 40. How many grams of NaOH pellets are needed to make 250 mL of…

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Q: 3. The oxidation number of Cr in (KCr₂O7-1) is: A. 4 B. 3 C. 6 D. 5

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Q: Consider the combustion of 1.0 mol propane gas (C3H8) in excess oxygen in open atmosphere at 25 °C.…

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Q: 27. Which type of reaction is represented by the equation below? Note: n and n are very large…

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Q: a) Name the following chemical compounds that are all salts. Remember to use the 'Stock system'…

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Q: Draw the hydrogen bonds between A and T that hold the double helix together. Show both molecules and…

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Q: QUESTION 1 1. Chemical bonding in chemistry may be explained by INTRA- and INTER- molecular bonding,…

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Q: 2. Complete the balanced equation for the following reaction. Write the total ionic and net-ionic…

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Q: Chemistry What types of sugar do the Australian soft drink “Solo” have? I couldn't find it…

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Q: 17. When metallic lithium is a reactant in a synthesis reaction with oxygen gas to form an ionic…

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Q: (MW = 44 g/mole) was collected on absorbent and found to weigh 0.1673-g. Calculate the percentage of…

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Q: 1. It takes 38 ml of 0.75 M NaOH solution to completely neutralize 155 ml of a sulfuric acid…

A: Dear student ,   since you have posted multiple questions we will allow to solve only first question…

Q: 7. Draw Fischer projections of two meso diastereomers of the following stereoisomer. CH3 CI CI H H…

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Q: 6. 7. How many moles of hydronium ions are present in 56 mL of a 0.58 M H₂SO4 solution? (10²) 7. 8.…

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Q: 4. Consider the first-order decomposition reaction of N₂O5 as shown below: N₂O5 2NO2+ - 0₂ 2 At…

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Q: ОН О-С-ОН O=C-C 0=C-0 ОН Br NO₂ H2C-CH3 ОН IV V Ш I 11 . Rank the following acids by acid strength,…

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Q: 2= H₂C= CH CH 3 3. 4 5. OH •GH CH 3 CH ₂ CH ₂ Br + LiAIH ₁ 2 CH3 + Brz H + H1/₂ CrO 4 + +1+/+1₂₂=0…

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Q: 6. Draw four alternative, reasonable resonance structures to represent the anion show below. Also,…

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Q: How can you tell the difference between flaky and puff pastry?

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Q: Ca(NO3)2 (aq) + 2 KIO3(aq) → Ca(IO3)2 (s) + 2 KNO3(aq) Calcium nitrate Potassium Iodate 1.00 0,200…

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Q: Explain the role of sodium bicarbonate during the workup step in the Ester Lab.

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Q: 1. A student carried out an experiment using an egg shell that contains Calcium Carbonate. A 0.500…

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Q: The last step in the synthesis of divinyl ether (used as an anesthetic under the name Vinethene)…

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Q: 3. Consider the range indicated, find the normalization constant of each of the ollowing…

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Group 15 elements

The elements of group 15 are phosphorus, nitrogen, bismuth antimony, and arsenic. The most abundant element which is present in the air is nitrogen and the percentage of nitrogen present in the air is 78%. In the free state, the elemental nitrogen is present as diatomic gas (N2). In the organic matter obtained from plants and animals, phosphorus is the dominant element present. In nucleic acids, phosphate groups are present. Phosphates are also found in teeth and bones. The other elements arsenic, bismuth, and antimony are found as sulfides. Arsenopyrite, bismuth glance, and stibnite are examples of sulfides of arsenic, bismuth, and antimony respectively.