aleo 1. Which of the following statements in Dalton's atomic theory had to be modified in modern atomic theory? (a) Chemical compounds are formed by union of two or more atoms of different elements. (b) Atoms combine to form compounds in simple numerical ratios. (c) Elements are composed atoms that are indivisible. (d) Atoms of two elements may combine in different ratios to form more than one compound.

Q: Two elements, R and Q, combine to form two binary compounds. In the first compound, 14.0 g of R…

A: Given: First Compound = 14.0 g R + 3.00 g Q  Second Compound =  7.00 g R + 4.50 g Q = RQ

Q: K: Mn: Ge: Kr:

A:

Q: 1, According to the law of definite proportions, a, the mass ratio of the elements in a pure…

A: Hi there! Thank you for the question, but as per our guidelines we can solve only one question at a…

Q: Two samples of carbon tetrachloride are decomposed into their constituent elements. One sample…

A: Given: Two samples of carbon tetrachloride are decomposed. One sample produces 38.9 g of carbon and…

Q: A new element, greenriverium (Gr), has three naturally-occurring isotopes. Isotope 1 has a mass of…

A: The atomic mass is the average mass of all the isotopes. So that we calculate the average mass with…

Q: What does the law of conservation of matter mean in chemistry? O a. The total number of molecules of…

A: Law of conservation of matter

Q: Uranium-235 is used in nuclear fission. Determine the number of protons and the number of neutrons…

A: Atomic symbol of element gives information about the chemical symbol, atomic number and mass number…

Q: 2 of 2 Explain why the atomic mass of an atom is a decimal number and how that value was determined…

A: In periodic table generally atomic masses are in decimal form because we know that almost for every…

Q: 1. Models come in many forms including physical, 2-dimensional, conceptual, computer, and…

A: Given: Two dimensional models, conceptual, computer and mathematical models To find: scientist use…

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…

Q: The mass of a single vanadium atom is 8.46×10-23 grams. How many vanadium atoms would there be in a…

A: Density is the physical quantity that relates mass of a substance with its volume.Mathematically,…

Q: in chemistry class, a group of students dtermined the mass-t-charge ratio for an electron to be 5.64…

A: Given: mass to charge ratio = 5.64×1012 kg/C Charge of electron = 1.605×10-19 C   Note:There is typo…

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: 2.1. In the following drawing, the green spheres represent atoms of a certain element. The purple…

A: Hey there thankyou for the question.    By law of constant proportion all samples of a pure compound…

Q: What is the mass of a single fluorine molecule, F2?

A: The mass of a molecule is the mass of all the atoms present in the molecule in grams. In order to…

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: What does 1/5 have to do with this equation?     You take three compounds, each consisting of two…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Why was it necessary for separation techniques and methodsof chemical analysis to be developed…

A: Law of definite composition states that the composition of a particular compound is the same no…

Q: In a test of the Law of Multiple proportions, two different compounds composed of elements A and B…

A: For compound X B/A = 2.33/1.00 = 2.33   For compound Y B/A = 5.83/1.00 = 5.83   Divide these two…

Q: A 1.0-g sample of carbon dioxide (CO2) is fully decomposedinto its elements, yielding 0.273 g of…

A: Given information: Mass of carbon = 0.273 g Mass of oxygen = 0.727 g Mass of carbon of different…

Q: When carbon and oxygen react, two different compounds can form dependingon the conditions. Compound…

A: Given observation: When carbon and oxygen react, two compounds are formed. Compound A contains 1.333…

Q: 1. Which is true about the Law of Conservation of Mass? 3. What was one of the tests that Lavoisier…

A: 1. D. Atoms cannot be created or destroyed, only rearranged. The Law of Conservation of Mass implies…

Q: What would the mass be of Gold, if you had 6.02 x 10^24 atoms of

A: GOLD, molar mass of Au = 196.97 g/mol atoms of Au = 6.023 x 1023

Q: In a test of the Law of Multiple Proportions, two different compounds composed of elements X and Y…

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Q: compound M2O3 is 30.06% oxygen, where M is an unknow metal. The element represented by M is?

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Q: Bromine is used to prepare the pesticide methyl bromide andflame retardants for plastic electronic…

A:

Q: Iodine (I) and fluorine (F) form a series of binary compounds with the following…

A: (a)

Q: Compounds are composed two or more elements chemically combined while mixture are composed of…

A: A question based on introduction to chemistry that is to be accomplished.

Q: 4. A bottle of Gatorade has a volume of 516 mL. What is this volume in quarts(qt)? (1 qt = 0.946 L )…

A: 4), Given. 0.946 L=1 qt We can say that, 946 mL=1 qt 1 mL=1946qt So, 516 mL=1946×516qt…

Q: How many protons and electrons are there in a neutral atom of each of the following elements?

A: Number of protons in a neutral atom is equal to its atomic number. Number of electrons in a neutral…

Q: The ratio for an mass-to-charge electron is 5.64x10−12 kg/C. In another experiment, using Millikan's…

A: Millikan did an experiment to determine the mass to charge ratio for an electron which was known as…

Q: A hypothetical element has only 3 isotopes, with the following masses: Isotope 1:  44.98 u Isotope…

A: Isotopes are the elements which have same atomic number but exhibits different mass number. To…

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…

Q: The anticancer drug Platinol (Cisplatin), Pt(NH₃)₂Cl₂,reacts with the cancer cell’s DNA and…

A: The amount of a particular compound present in a solution is expressed by the various concentration…

Q: 2-75. A sample of rutile, an ore of titanium consist- ing principally of TiO,(s), was found to be…

A: The question is based on the concept of quantitative analysis. we have to calculate how much…

Q: 1) A 1.0-g sample of carbon dioxide ( CO2) is fully decomposed into its elements, yielding 0.273g of…

A: Since there are multiple questions, we answer only first question as per our policy, that is, no. 1.…

Q: Gallium Arsenide has a density of 5.32g/cm3 and the chemical formula GaAs. A GaAs piece has a volume…

A:

Q: If a row of approximately 5.0 x 107 atoms measured 1.0 cm, how long would a row of 6.02 × 1023 atoms…

A: Given is row of atoms, 1.0 cm = 5.0×107 atoms 6.02×1023 atoms = ?

Q: Question attached

A: The given data contains, mass of carbon C = 0.273 g mass of oxygen O =0.727 g

Q: Bromine (atomic mass 79.904 amu) consists of 2 different naturally occurring isotopes, Br-79 (atomic…

A: .Bromine consist of two isotopes 79Br and 81Br.     79Br⇒78.9193 amu.     81Br⇒80.9163 amu…

Q: 2. The creation of carbon monoxide is an effect. What is one cause? A. the regrouping of the atoms…

A: 2. Operating a stove. 3.  A harmless compound can become harmful when its elements are separated. 4.…