Hydrogen peroxide (H2O2) is a mild antiseptic used to prevent infection in minor cuts and scrapes. The density of H2O2 is 1.45 g/mL. The cylinder container that the hydrogen peroxide is stored in has a radius of 8.5 cm and a height of 22 cm. If the container is full, calculate the number of oxygen atoms in the container. (Vcylinder = πr2h)

Q: Should the elemental symbol for lead be written as Pb or PB? What confusion could arise if the wrong…

A: Elemental symbol for lead is Pb and it should be Pb .

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A: To find: The name of the given elements represented by the chemical symbol

Q: carbon atom has a radius of 77 picometers. Calculate the volume of a carbon atom in cubic meters ().

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Q: 2.77 Identify the following as elements or compounds: NH3, N2, Sg, NO, CO, CO,, H2, SO2.

A: Matter is any substance that occupies space and volume. Matter is classified into pure substances…

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A: It is Acidic buffer,  So, pH range for buffer solution  pH = pKa +/- 1 pKa = 2.82

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A: Calculate the number of moles as follows, Number of moles =2.41×10246.022×1023=0.4×10=4 moles Now,…

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A: To find: The fact that the C atom can form compounds like CH4, C2H5O, H2C=CH2, HC≡CH, etc.,…

Q: An atom of rhodium (Rh) has a diameter of about  2.7×10−8cm2.7×10−8cm   If the atom is assumed to…

A: The diameter of the rhodium atom is = 2.7×10-8 cm The volume of rhodium atom in m3 is =?

Q: 2. Elizabeth has two separate samples of the same substance. One sample is in the liquid state, and…

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Q: 1. What is the mass of 1.53x1024 atoms of helium? grams 2. How many helium atoms are there in 46.4…

A: Number of moles is the ratio of given mass of the substance to the molecular mass of the substance.

Q: Gold (Au) has a density of 19.32 g-cm-3. If a spherical gold nanoparticle has a diameter of 50 nm…

A: Density of Gold nanoparticle is 19.32 g/cm3 and its volume is 7*104 nm3.

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A: Given: Five elements, (a) Potassium (b) Iodine (c) Magnesium (d) Argon (e) Sulfur

Q: Na,CO3(aq) + CaCl2(aq) → 2 NaCI(aq) + CaCO3(s)

A:

Q: The element silicon has a melting point of 1,410°C and a boiling point of 2,355°C. It is a weak…

A: Since in the question it is given that it reacts with O2 i.e oxygen in air and form SiO2 i.e silicon…

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A: Since No of mole of epsom salt (MgSO4.xH2O) will be equal to no of mole of MgSO4. On solving we…

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Q: gas. D. Matter with a defined shape and defined volume. E. The formation of new substances by…

A: We have to match the right answer

Q: Identify the elements in each chemical formula, and give the number of atoms of each element. a.…

A: a. NaCN (sodium cyanide) Elements : Na , C and N. Number of C atoms = 1 Number of Na atoms = 1…

Q: Part F The compound iron chloride can exist with either iron(II) ions or iron(IIl) ions. Conduct…

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Q: 1s²2s 2p*3s' Express your answer as a chemical symbol.

A: Part A Excited electronic configuration is 1s2 2s2 2p4 3s1 1 electron from 2p transferred into 3s…

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A: Mass of forsterite (Mg2SiO4) = 80.0 g  Number of magnesium atoms = ?

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Q: Following the above question, for 1.50 L of mercury, what is the mass in kg? O 2.03 x 10° kg O 2.03…

A: Given details, The volume of mercury = 1.50 L = 1500 cm3 The density of mercury = 13.534 g/cm3…

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A: Calculation of the mass of 1 atom of aluminium in picograms:

Q: One mole of silicon (6 x 1023 atoms) has a mass of 28 grams, as shown in the periodic table on the…

A: Given :- Mass of 6 × 1023 atoms = 28g  Density = 2.4g/cm3

Q: What is the symbol of the element in Group 4A(14) and Period 2?

A: Given,  Group number of the element = 4A that is 14  And  Period number of the element = 2  What is…

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A: Physical property of element sulfur can be tasteless, solid and pale yellow color with insolubility…

Q: How many grams of Mg2+ are present in 3.80 grams of magnesium oxide?

A: The chemical formula of magnesium oxide is MgO.

Q: About two centuries ago, Benjamin Franklin showed that 1teaspoon of oil would cover about 0.5 acre…

A: The volume of the oil (V) = Area (A) x Thickness (T) T = V/A    1 km = 0.6214 mi, so 1 km2 = (0.6214…

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Q: 104.3 MHz in energy

A: We know that , energy of a photon is related to Plank's constant as,…