State the number of protons in Ni^2+ Express your answer as an integer.   State the number of electrons in Ni^2+. Express your answer as an integer.

Q: A pure titanium cube has an edge length of 2.69 in . How many titanium atoms does it contain?…

A: Given- Density of titanium = 4.50 g /cm3 Edge length of pure titanium cube = 2.69 in To find- number…

Q: Express your answers to at least 5 significant figures. The mass of one mole of boron is 10.811 g.…

A:

Q: An unknown sugar is found to have a molecular weight of 180.18 amu. The sugar contains 40.O %…

A: Given data  Element composition (mass %) C 40 H 6.7 O 53.3 Molar mass of sugar = 180.18…

Q: Calculate the surface area in nm^2 of water contained in a watch glass with a diameter of 9.0cm. The…

A: Given,Diameter = 9.0 cm

Q: Jean Baptiste Dumas is credited with establishing values for the molecular weights of thirty…

A: Jean-Baptiste Dumas was a French chemist, who was known for his organic analysis and Synthesis.

Q: What is the number of Carbon atoms in this chemical formula?   C_{11}H_{24}

A: The chemical formula is used to represent a compound. The given chemical formula of the compound is…

Q: Table 1. Tabulated data from Figure 2. Rel. Abundance m/Z Proposed Identity ~1 45 100 44 ~11 28 ~2…

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Q: Identify all of the true statements, regarding elements, compounds, and pure substances.   a)Pure…

A: Elements consist of a single type of atoms. They cant be further divided into smaller structures and…

Q: A copper atom has a mass of 1.06 x 10 g and a penny has a mass of 2.5 g. Use this information to…

A: Mass of Cu atom = 1.06 × 10-22 g Mass of penny = 2.5 g 1) Mass of 1 mole of Cu atom =? 2) Number of…

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

A:

Q: 96. Plutonium-239 is used in nuclear bombs. Determine the number of protons and neutrons in…

A: The atomic number of an element represent the number of protons present in the nucleus of that atom.…

Q: How many hydrogen atoms are in each of the following:   Part A: C2H5OH Express your answer as an…

A: Atom is the smallest unit of a substance. Atoms combine to form a molecule which is a stable entity.…

Q: 59 100- 80- M(102) 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 m/z Relative Abundance

A: Mass spectra helps us to analyse different possible fragments in a given organic compound by various…

Q: Magnesium, Mg Strontium, Sr Barium, Ba E Radium, Ra :::: :::

A: We know that on going left to right atomic radii decrease and on going from top to bottom atomic…

Q: What is the percent by mass of oxygen in morphine, C17H19NO3? Group of answer choices 71.55 6.72…

A: The molecular formula of morphine is = C17H19NO3 The percent mass of oxygen in the morphine is =?

Q: A chemist in an imaginary universe, where electrons have a different charge than they do in our…

A: The idea is the number of electrons is a whole number.  So to find a charge that a “whole multiple”…

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

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

Q: 1. CACO3 23 BaF2 3. 4 H2PO4 4 Sr(OH)2 5.3 Al2(Cr207)3

A: Given :-  1.     CaCO3  2.     3 BaF2  3.      4 H2PO4  4.      Sr(OH)2  5.      3 Al2(Cr2O7)3  To…

Q: 3.72 (A) what is the atomic weight of the halogen X? Express your answer using two significant…

A: "Since there are multiple sub-parts in this question and it is not mentioned that which one has to…

Q: A sample of trifluoroacetic acid, C2HF3O2, contains 82.182.1 g of fluorine. Calculate the mass of…

A: Given, trifluoroacetic acid C2HF3O2, contains 82.182.1 g of fluorine Molar Mass of trifluoroacetic…

Q: Convert the following percentages to proportions: 74.9%, .2%, 5.1%.

A: To solve this problem we will calculate the proportion of given percentage .

Q: In many carbohydrates, the ratio of carbon atoms to hydrogen atoms to oxygen atoms is 1:2:1. If a…

A: Given: In a carbohydrate, the ratio of carbon atoms to hydrogen atoms to oxygen atoms is 1: 2: 1.

Q: Given 24/14 Si, a) Find the number of protons, electrons and neutrons in the neutral atom. b) Find…

A: The answer is attached below-:

Q: Circle the best correct answer for the following multiple choice questions: 1) How many aluminum…

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Q: A chemist adds 85.0 mL of a 1.18 x 10 mM mercury(II) iodide (HgI,) solution to a reaction flask.…

A:

Q: Be sure to answer all parts. Enter your answers in scientific notation. Calculate the number of…

A: The compound given is Ca3(PO4)2. Mass of Ca3(PO4)2 given = 9.75 g Molar mass of Ca3(PO4)2 = Atomic…

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

A:

Q: How many neon atoms are contained in (6.89x10^2) grams of neon? Use at least two decimal places for…

A: Given -> Weight of neon = 6.89 × 102 gram

Q: 2 .What is the 2nd most prevalent element in soil (name, not symbol)?   3. What is the name of the…

A:

Q: Find the mass of 1 molecule of NaH  in gram. a. 12 b. 3.98 x10-23 c. 23.99 d. 3.98 x1023

A:

Q: State the number of protons in Ag^+. Express your answer as an integer.   State the number of…

A: Electronic configuration of Ag (47) = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s1 Number of protons…

Q: an unknown copper sample has a 37.2% Copper, what is the most likely identity of the sample?

A:

Q: The total number of atoms in a molecule of caffeine (C8H10N4O2) is:

A: Given :- molecular formula of caffeine = C8H10N4O2  To calculate :-  Total number of atoms in…

Q: A sample of chemical X is found to contain 5.0 grams of oxygen, 10.0 grams of carbon, and 20.0 grams…

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Q: Calculate the average atomic mass of carbon if 98.90% of the atoms are C-12 (12.000000 amu) and…

A: Here, we need to calculate the average atomic mass of the Carbon if 98.90% of the atoms are C-12…

Q: An atom of a particular element has a volume of 7.8 X 10-31 m3. What is this volume in cubic…

A: Find volume of atom in cubic nanometre

Q: which compound contains about 40% carbon by mass? A pure sample of an organic molecule has the…

A: Considered that the compound contains only 1 carbon atom then the molar mass of the compound must be…

Q: Taking logarithms and antilogarithms is necessary to solve many chemistry problems. For practice,…

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Q: The following data was collected. If it is known that compound 1 has the formula XY, Determine the…

A:

Q: Consider the following statements: 1. A molecule is the smallest particle of an element or compound.…

A: An element is the smallest particle of a molecule or compound  A molecule can exist independently

Q: MCQ 9: Two Greek words 'element' and 'measure' constitutes the word A. spectrometry B. stoichiometry…

A: In Greek language, word stoikhein means the element. And word metron means measure. That is why word…

Q: 2 Give the name of each of the following elements: a. Noble gas in Period 2 b. Halogen in Period 2,…

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Q: Sample Substance Observat N2O4 3 Fe 4 O2 LiF Sr Al 12

A: Which are excuse in monoatomic or diatomic in nature will called as elements So S,O2,Fe,Sr,Al are…

Q: State the number of protons in Se^2−. Express your answer as an integer.

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Q: Calculate the mass, in grams, of each of the following.   1.6×1023 gold atoms Express your answer…

A: Number of atoms of different elements are given and from that given data, we have to find the mass…

Q: A sample of methane, CH4, has a mass of 38.75g. Calculate the number of methane molecules in the…

A: Mole concept:  The number of molecules in one mole of the substance is equal to the Avogadro number…

Q: For calcium, carbonmonoxide and carbondioxide; 1. Calcium, carbonmonoxide 12 and carbondioxide are…

A: 1) calcium, carbon monoxide and carbon dioxide are composed of the same kind of molecules.

Q: Part A - Determining Density and Using Density to Determine Volume or Mass Platinum, Pt, is one of…

A:

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.