What is the approximate mass of an oxygen molecule, O2, if the atomic mass of oxygen is 15.9994 u?

Q: Balance the following equation: 40 20 40 K K Ca+? 19

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Q: 15. This Foreverspin TM top os made of pure carbon, with an Atomic Mass of 12. This top weights 9…

A: Given 12g grams of carbon will contain 6.02*10^23 atoms. Rounded of nearest 10th means rounding the…

Q: 2. Consider radium, which has a half-life of 1620 years. How many atoms of radium will decay in 5 s…

A: We have a Radium sample of mass m=15 g=0.015 kg which has a molar mass of M=226 kg and half life of…

Q: 1/what is the main difference between hydrothermal and Solvothermal methods for synthesis of…

A: in this question  we discuss hydrothermal  and solvothermal synthesis.

Q: 1- How do molecular mechanics methods calculate the potential energies of molecules?

A: SOlution:

Q: Nanotechnology, the field of trying to build ultrasmall structures one atom at a time, has…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Question 3/ Calculate the density of the nuclear substance of the nucleus of the Carbon-12 atom, if…

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Q: example) which method is better. for synthesis of metal nanoparticles? кну? why we try to keep…

A: in this question  we disscus about  nano particles.

Q: 3. A 5 gm/100 ml solution of drug X is stored in a closed test tube at 25°C. If the rate of…

A: Given data The initial mass is mo = 5 gm The initial volume of the drug X is Vi = 100 mL The rate of…

Q: Q8/ If the mean number of atoms in a system is 4.4x1020 atoms, each atom has energy of -3.4eV, the…

A: Given:Numer of decay of this energy = 8Number of atoms = 4.4×1020 atomsSolution:We know that:Average…

Q: (application) You're comparing three different atoms. Atom A has 9 protons in the nucleus, Atom B…

A: Atom A has 9 protons in the nucleus Atom B has 10 protons in the nucleus  Atom C has 11 protons in…

Q: 2. How ma 19.6°C? C Freon = 0.660 3. How mu- specific h 4. Determin for 10.00 placed in heat of w

A: Given, Mass of metal,m1=45 g Initial temperature of metal,T1=98 °C Mass of water,m2=112.4 g Initial…

Q: 5. Which diode model represents the most accurate approximation?

A: SOlution: which diode model represent the accurate approximation.

Q: 1. Complete the following statement: The atomic mass unit (u) is defined so that 1 u is exactly…

A: Answer: (E) 1/12  of a Carbon-12 atom

Q: 1. Which two elements are most similar? a. Fe and Co c. Cu and Ag b. Li and F d. H and O O A O B

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Q: Q1/ In an atom the number of electrons in 3rd shell is equal to the number of electrons in the 2nd…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Suppose you want the nuclei in your fusion experiment to have average kinetic energies of 6.55 ×…

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Q: 1. The half-life of cobalt-60 is 5.3 years. If 4.0g of cobalt-60 are allowed to decay for 21.2…

A: Given Half life t12 = 5.3 years, Initial amount N0 = 4 gram 1(a)  now from formula         N =…

Q: The normal body temperature can range from 36.1 ᵒC to 37.2 ᵒC. Persons with emperature above the…

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Q: 2. (Principle) What does the H-value mean? How is it related to energy balance?

A: The H-Value means enthalpy value in thermodynamics.The Enthalpy value in thermodynamics is the sum…

Q: 4.) Suppose you know a material is p-type, and that the thermal equilibrium electron concentration…

A: Solution:-

Q: The atomic number of a given element is equivalent to?   Group of answer choices   A)the sum of the…

A: The atomic number of a given element is equivalent to

Q: 4. Find the atomic spacing in a crystal of rock salt (NaCl), whose cubic structure. The density of…

A: Density (ρ) = 2.16 x 103 kg /m3Avagadro number = 6.022 c 1023 /moltotal mass of NaClM =  Na++ Cl-…

Q: 1. How does quantum mechanics describe an atom? 2. Write the electron configurations for zirconium…

A: ANS (1)   Quantum theory describes matter as acting both as a particle and as a wave Electrons in…

Q: Question 15 The half-life of Unobtanium-118 is 3 days. How many days pass for 800 grams of this…

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Q: 1. Copper has an average atomic mass of 63.55 and has two naturally occurring isotopes, 63Cu and…

A: Taking the mass of the Cu65 be 'x' in the given composition. Now if we assume 100% of the total…

Q: 06- According to the below reaction , determine the Q-value of reaction and showing type of…

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Q: 4. How must nuclear waste that is considered high-level waste be stored? A.sealed away from living…

A: Generally nuclear waste is stored in the facility where it was produced

Q: 8. What is the difference in packing efficiency between the hcp structure and the ccp structure?

A: as per our guidelines we are supposed to answer only one question. Kindly repost other questions as…

Q: This is NOT graded.

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Q: 3. A mass of 135 g of a certain element is known to contain 30.1 × 1023 atoms. What is the element?

A: mass, m = 135 g  number of atoms, n = 30.1 x 1023

Q: 2. Can a 1kg mass balance 1000kg a mass? How?

A: Yes we can balance a 1000 kg mass by a 1kg mass by using torque balance method. How we can balance…

Q: A drug has a half-life of 6 hours. The drug is administered by I/V injection, and immediately after…

A: Half-life is the time required for a quantity to reduce to half of its initial value.…

Q: 6. Find at least 5 elements whose symbols do not match their names 7. What are the two letters not…

A: Elements A substance that cannot be broken down into simpler substances by chemical means. An…

Q: An old campfire is uncovered during an archaeological dig. Its charcoal is found to contain less…

A: The expression for the age from the radioactive decay law,

Q: Q6- According to the below reaction, determine the Q-value of reaction and showing type of reaction,…

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Q: 1. (i) What is active element? Give two examples of both active and passive elements. (ii) What is 1…

A: In engineering, passivity is considered to be the most influencing property. In general, electronic…

Q: Determine the number of protons, neutron, and electrons in each of the following species  35-Cl17

A: Given : Species 35-Cl17 Here, Mass number = 35  Atomic number = 17

Q: While researching for her class presentation, karen has read that natural occuring Gallium consists…

A: Given in question -  60% Ga (atomic mass=68.911)                                    40 % of…

Q: 4. Compare the following two masses and find the percetage difference between the two values: 2.43…

A: Given : m1 = 2.43 kg m2 = 2.27 kg

Q: 3. Calculate the number of atoms in 250 g of silver (Ag) if atomic mass of silver is 107.868 g/mol

A: Given: The weight of the silver is 250 g. The atomic mass of silver is 107.868 g/mol.

Q: What is the equation of state for 16 Kg of O2.

A: According to ideal gas equation, the product of pressure and volume is equal to the product of…

Q: 2. If the birth rate was 1.3%, how many individuals were born that year? O2,683,450 O 3,144,591…

A: Given  Population total in 2018 is = 241,891,650 To find Individuals born that year

Atomic Number

Elements are the building blocks of all the matter that exist in the universe. Every element is made up of atoms that have protons, electrons, and a nucleus. In order to know the difference between the elements, an atomic number is used. Every element has its own individual atomic number. The atomic number is a single most important characteristic of an atom.