What is the mass of (5.00x10) number of calcium atom? Report your answer to 3 significant figures and include the unit in your answer

Q: Calculate the temperature at which two gases with different molecular weights both have an average…

A: gas1: 32g/ mol Average speed = (8RT/pi*M)1/2 Average speed =415 m/s R = gas constant = 8.314 J/K*mol…

Q: The ratio of reactivity of tertiary:secondary:primary hydrogen atoms in a bromination reaction at…

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Q: Instructions: Compute for the following problems stated below. Express your final answer into 4…

A: Molecular weight is calculated by adding the atomic masses of all the atoms present in the molecule.…

Q: How many moles are there in 368.6 g of N*a_{2}*S*O_{4} * 3 Answer to 2 decimal places and give the…

A: Given ,  mass = 368.6 g molar mass of Na2SO4 = 142 g/mol

Q: Identify the point(s) on the following diagram where the addition of heat will cause the temperature…

A: As seen from the graph there are 10 points where the changes occur .  Now , At point A, as the heat…

Q: What are all the possible resonance structures (contributors) for the compound below? Please draw…

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Q: Nitrogen forms a surprising number of compounds with oxygen. A number of these, often given the…

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Q: A- In a heat engine, the upper and lower temperatures are 200 and 40 °C, respectively. The…

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Q: 10.3 For a linear molecule of polyethylene of molar mass 119,980 g mol-¹, calculate: (a) the contour…

A: Given data ;                       Molar mass of polyethylene (M) = 119,980 g mol-1      Now,…

Q: 6 Consider this reaction, which occurs in the atmosphere and contributes to photochemical smog:…

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Q: Benzoic acid, C7H6O2, occurs naturally in many berries. Suppose you burn 1.500 g of the compound in…

A: Given: mass of benzene = 1.500 g mass of water = 775 g heat capacity of calorimeter = 893 J/K…

Q: An aqueous solution of 7.700 g of catalase, an enzyme found in the liver, has a volume of 1.00 Lat…

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Q: a. Calculate the amount of energy involved when 300. mL of 2.00 M NaOH is mixed with 400. mL of 1.00…

A: 2 NaOH (aq) + H2SO4 (aq)→Na2SO4 (aq) + 2 H2O (l) ΔHrxno = [ΔHfo (products) -  ΔHfo (reactants)] heat…

Q: Consider a buffer that has a free amino group (X-NH2 ) with a pKa of 8.5. If the buffer is present…

A: Henderson equation is  pOH = pKb + log [salt][base] X-NH2 is base form and X-NH3+ is acid form which…

Q: The longest wavelength of light that causes electrons to be ejected from the surface of a copper…

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Q: Step 1: Find the Central Atom Central atom is: S Look your line bond structure on page 1. :0 - 5=0…

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Q: Given the standard enthalpy changes for the following two reactions: (1) 2Pb(s) + O2(g) → 2PbO(s)…

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Q: There are three main regions of the periodic table. Choose one element from each of these regions…

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Q: Decide whether each pair of elements in the table below will form an ionic compound. If they will,…

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Q: In a winter country, a winemaker is waiting for her grapes to freeze in order to make a special…

A: Given: Grapes are 30% glucose by mass.  So, mass of glucose is 30.0 g

Q: By E₁ = Aby E Step 1: Find the Central Atom Central atom is: с Look your line bond structure on page…

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Q: The decomposition reaction given below: 2 NOCl(g)  2 NO(g) + 1 Cl2(g) is carried out in a closed…

A: The decomposition reaction of NOCl is 2 NOCl(g)------------>  2 NO(g) + 1 Cl2(g)  The partial…

Q: Indicate whether the following double bond is in E or Z configuration and which is the highest…

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Q: A certain liquid X has a normal boiling point of 105.50 °C and a boiling point elevation constant…

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Q: What is the sum of coefficients from the following reaction (both products and reactants)? X.5H2O +…

A: Coefficients are the numbers which are  used to balance  a chemical equations. It always placed in…

Q: Description of atom Evidence supporting model or explained by the model Picture of atom J.J.…

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Q: Which of the molecules, C02, NH3, and BCl3 will be polar?

A: we have to select the polar molecule out of CO2, NH3, and BCl3

Q: Does a reaction occur when aqueous solutions of sodium carbonate and manganese(II) iodide are…

A: In this reaction, MnCO3 is produced which water insoluble due to low solubility product. Na+ and I-…

Q: Explain the difference between a pure chemistry and an applied chemistry.

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Q: Which of the following is a valid set for four quantum numbers? a. 4, 0, -1, +1/2 b. 2, 1, 0, -1/2…

A: •Here quantum number are given and we have to select valid set of numbers. •Quantum number are…

Q: The amino acid glycine has been used as a buffer for a number of biochemical experiments. Glycine…

A: Buffer solution: The solution that resists the change in pH is known as a buffer solution. The…

Q: Draw the organic product of the Lewis acid-base reaction shown below. Include all lone pairs and…

A: First of all, be familiar with the concepts of the Lewis acid and Lewis base.  Lewis Acid-  The…

Q: E17C.1(b) The equilibrium constant for the binding of a drug molecule to a protein was measured as…

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Q: Choose the correct reason why an electron in a d-orbital cannot make a transition into an s-orbital.…

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Q: QUESTION 3 35Cl (mass 34.9689 amu) and 37 C1 (mass 36.9659). The atomic weight of Cl in the…

A: Given, Naturally occurring chlorine contains 35Cl (mass 34.9689 amu) and  37Cl (mass 36.9659). The…

Q: When 224. mg of a certain molecular compound X are dissolved in 30. g of benzonitrile (CH-CN), the…

A: When 224 mg of compound dissolved in 30 g of benzonitrile, we need to calculate molar mass of that…

Q: (acidity) Inductive effect (acidity) Atom size (acidity) bonded to the hydrogen (when it was in the…

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Q: C. Formation of a solid 1. Potassium iodate and silver nitrate i a. Balance the reaction: 1 KIOS…

A: Here we are required to state the observation when potassium iodate and silver nitrate react.

Q: MASS SPECTRUM entify the following from the low resolution mass spectrum of the unknown compound:…

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Q: 4. For each acid-base reaction below Label the acid and base i. ii. iii. iv. V. Draw the arrows that…

A: Here we have to predict conjugate acid and conjugate base and direction of acid - base reaction  at…

Q: I need this question answered in 20 minutes please and thank you. I will write a long and wonderful…

A: Work function: It is defined as the minimum quantity of energy required to remove an electron  from…

Q: 9. Good Question. Arrange the following species in order of increasing electron density or oxygen…

A: Given following compounds  O2 , CaO , OF2 , CO2  We have to arrange them in order of increasing…

Q: H Gitt H H H I -N. N H

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Q: Part I: Line Bond Structures Instructions: After looking at the examples on page 2 and 3, complete…

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Q: Hydrogen peroxide, H_{2}*O_{2} is a colorless liquid. A concentrated solution of it is used as a…

A: Given -> Moles of H2O2 = 1.151 mole

Q: Write the empirical formula for at least four ionic compounds that could be formed from the…

A: Answer: Empirical formula is the formula of the compound in which all the atoms present in the…

Q: onsider the photo of a 1000 ml graduated cylinder shown below. What is the volume of the water in…

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Q: In the fermentation of sucrose to ethanol, Calculate how many milliliters of CO2 (at STP) would be…

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Q: F2 QUESTION 5 How many protons, neutrons, and electrons are there in the 34 A. 34 protons, 16…

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Q: A student properly sets up a column chromatography experiment. Although the mixture is soluble in…

A: Column Chromatography is used to separate a mixture of compounds into its pure components. The basis…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.