Which statement is TRUE? An atom of Carbon-14 contains 6 protons, 8 neutrons, 6 electrons in its nucleus. An atom of Bromine-79 contains 79 protons, 44 neutrons, 35 electrons. lons are formed by changing the number of protons in an atom's nucleus. 1602- has 10 electrons. The number of protons and neutrons is always the same in the neutral atom.

Q: Relative number of atoms The stable isotopes of iron are 54F., 56FE, 57Fe, and 58F.. The mass…

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Q: Element X reacts with chlorine to form a compound with the formula of X2Cl3. This compound contains…

A: Relative atomic mass: Cl = 35.5 g/mol

Q: 27. Upon decomposition, one sample of magnesium fluoride produced 1.65 kg of magnesium and 2.57 kg…

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Q: Writing the formulas for the resulting compounds   silicate  selenide  hydrogen sulfate  Iron (iii)…

A: To solve this problem we have to write the formula of the given compound .   We know that the…

Q: Figure 3. Diatomic molecules of the element chlorine, Cl2. This Figure 4. Molecules of the compound…

A: ⇒All atoms are made up of tiny particles ie,protons,neutrons and electrons⇒A n element is a pure…

Q: 2.74 An ionic compound forms when lithium (Z = 3) reacts with oxygen (Z = 8). If a sample of the…

A: Given data contains, Number of lithium ions is 8.4×1021 Li ions. Atomic number of Li is 3. Atomic…

Q: 1. The phenomenon of isotopy is due to the number of A. Neutrons B. Electrons C. Proteins D. Protons…

A: Isotopes are atoms of the same element that have the same number of protons but different number of…

Q: The two isotopes of potassium with significant abundance in nature are ³⁹K (isotopic mass 38.9637…

A: NOTE : The sum of abundance of the two isotopes should be 100 %. And since the abundance values do…

Q: In nature, gallium (Ga) is found as two isotopes. Calculate the atomic mass of this element. 69…

A: If an element exist in two isotopes then to calculate its atomic mass, multiply all the element…

Q: percent abundance

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Q: On planet X431A, the isotopes of carbon, C , have the following natural abundances: Abundance (%)…

A: #Q.1: Data given for planet X431A Given the atomic mass of 1st isotope, M1 = 12.000 amu Fractional…

Q: 69 2.47 Gallium has two naturally occurring isotopes, Ga (isotopic mass = 68.9256 amu, abundance…

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Q: The most common ions for silver, zinc, and scandium areAg+, Zn2+, and Sc3+. Locate the boxes in…

A: Location of ions has to be given.

Q: 1. Naturally occurring copper has two isotopes with relative atomic masses 62.9 3 and 64.928. if the…

A: The question is based on the concept of isotopic abundance. we have been given average atomic mass…

Q: 8- Bromine (Br) has two isotopes, with masses of 78.92 and 80.92 amu. The natural abundance of the…

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Q: 14. Which of the following has 58 neutrons, 45 protons, and 45 electrons? Mo (A: 103; Z: 45) Tu (A:…

A: The number of electrons in an atom is always equal to its atomic number . According to quantum…

Q: Fill in the gaps in the following table:

A: Atomic number (Z) is defined as number of protons present in an atom.  In a neutral atom number of…

Q: Consider a series of four technetium isotopes and ions. 98 Tc 43 99 99 Tc Tc 43 96 Tc 43 44 Which of…

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Q: . Calculate the molar mass of an element which has 12 protons from the following list of elements,…

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Q: A 6.55 g sample of calcium sulfide was decomposed into its constituent elements, producing 3.64 g of…

A: According to the law of constant composition, for any particular chemical compound, all samples of…

Q: 7. Name each of the following compounds: c. KMNO d. K,Cr,O, a. BaSO, b. NANO2

A: Some of the prefixes are used in naming the inorganic molecular compounds, they are listed below.…

Q: Assuming that these ions are ^{53}Fe^{2+}53Fe2+ , how many protons and neutrons are present in a…

A: The given chemical species is 53Fe2+.

Q: 27. How many electrons does 207Pb+2 have? a. 80 b. 82 С. 84 d. 125 28. How many electrons does Ga+3…

A: The atomic number of an atom is the number of protons present in the atom. For a neutral atom, the…

Q: 1.The formula mass of the compound between gallium (III) and oxalate ions in g/mol is: Group of…

A: The formula mass of a compound is the total average atomic masses of each atom which is showed in…

Q: 1. Cobalt forms two sulfides: CoS and Co2S3. Predict the ratio of the two masses of sulfur that…

A: The sulphide of cobalt given are CoS and Co2S3. The oxides of lead are given are PbO and PbO2 The…

Q: 8- Bromine (Br) has two isotopes, with masses of 78.92 and 80.92 amu. The natural abundance of the…

A: bromine has two isotopes which are Br-79 and Br-81. Given, the mass of Br-79 isotope = 78.92 amu the…

Q: In Star Trek, a (fake) element that often plays a role in the plot is dilithium (Dt), which has…

A: Since the % abundance is not given exactly, it is a variable, thus answer will be given in terms of…

Q: chlorine has two different isotopes. one isotope has a mass of 35.00 amu and another has a mass of…

A: Average atomic mass of Chlorine depends on the relative abundance of the isotope present in the…

Q: The PHIVOLCS recently reported that Taal volcano emitted 15,500 tons of Sulfur Dioxide (SO2). How…

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Q: A 5.235.23 g sample of calcium sulfide was decomposed into its constituent elements, producing…

A: According to Law of Definite Proportions, compounds always occur in a certain fixed ratio. For…

Q: The smallest unit of charge is -1.6 x 10-19 C, which is the charge in coulombs of a single electron.…

A:

Q: 14. Given the information below, calculate the weighted average atomic mass (amu) of the element X.…

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Q: Calculate the mass, in kg, of each sample. I.) 1.68×1026 cadmium atoms. II.) 3.57×1027 nickel…

A: Here we need to calculate the mass of each sample as: I.) 1.68×1026 cadmium atoms. II.) 3.57×1027…

Q: 8- Bromine (Br) has two isotopes, with masses of 78.92 and 80.92 amu. The natural abundance of the…

A:

Q: 13) Fill in the blanks to complete Table 2. (A = mass number) (4 points)W.A3W2MA TROH2 %3D oidesup…

A: In a neutral atom, the Number of electrons= No. of protons Atomic number (Z)= number of protons (p)…

Q: 6. How many moles of protons are present in 3.30 x 1018 sodium atoms? A 2.19 × 1043 ) B) 5.48 x 10-6

A: Mole is a standard unit for measuring large quantities of very small entities such as molecules.…

Q: . What do you have to change in order to change the identity of an atom  2. find oxygen on the…

A: 1. Atom has its mass centered and named as Nucleus which is made up of neutrons and protons. If…

Q: Determine the mass percent of STRONTIUM in Sr(NO3)2.

A: The given compound is strontium nitrate, Sr(NO3)2. The mass percent of the strontium in the…

Q: Bromine has two isotopes, Br-79 and Br-81. Their abundances are 49% and 51%, respectively. Chlorine…

A:

Q: 5. Which of the following is a species with 12 protons and 10 electrons? a) Ne?* b) Ti2* c) Mg? d)…

A: Number of proton = atomic number Number of electrons =( atomic number) +- charges

Q: What is the reducing agent in this reaction: N2 + 3H2 --> 2NH3 * N2 Н2 NH3 2NH3 What is the BEST way…

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Q: The PHIVOLCS recently reported that Taal volcano emitted 15,500 tons of Sulfur Dioxide (SO2). How…

A: Here we have to find total number of sulfur atoms present in 15500 tons of SO2 gas . Here we have to…

Q: Which of these statements is not correct according to Dalton's atomic theory? O Elements combine in…

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: Two samples of sodium chloride with different masses were decomposed into their constituent…

A: Given: Mass of sodium in sample 1 = 2.91 g. And mass of chlorine in sample 1 = 4.48 g.

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.