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3 years ago

11

The range in size of most atomic radii is approximately _____.5 × 10−11 m to 2 × 10−10 m2 to 5 nm5 × 10−21 m to 2 × 10−20 m2 to

5 cm

1 answer:

Komok [63]3 years ago

4 0

A) 5*10-11 m to 2*10-10 m

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What is the wave speed if the wave length is 8 and the frequency is 20

PilotLPTM [1.2K]

Answer:

160m/s

Explanation:

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Q#5 Balance and list the coefficients from reactants to products.

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2 years ago

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____________ tautomers have a C=O and an additional C-H bond.

Roman55 [17]

Ch = sh = why and find the stuff

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3 years ago

The standard enthalpy of formation of BrCl(g) is 14.7 kJmol-1 . The standard enthalpies for the atomization of Br2(l) and Cl2(g)

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Explanation:

Equation of the reaction:

Br2(l) + Cl2(g) --> 2BrCl(g)

The enthalpy change for this reaction will be equal to twice the standard enthalpy change of formation for bromine monochloride, BrCl.

The standard enthalpy change of formation for a compound,

ΔH°f, is the change in enthalpy when one mole of that compound is formed from its constituent elements in their standard state at a pressure of 1 atm.

This means that the standard enthalpy change of formation will correspond to the change in enthalpy associated with this reaction

1/2Br2(g) + 1/2Cl2(g) → BrCl(g)

Here, ΔH°rxn = ΔH°f

This means that the enthalpy change for this reaction will be twice the value of ΔH°f = 2 moles BrCl

Using Hess' law,

ΔH°f = total energy of reactant - total energy of product

= (1/2 * (+112) + 1/2 * (+121)) - 14.7

= 101.8 kJ/mol

ΔH°rxn = 101.8 kJ/mol.

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3 years ago

Describe how lead sulfate can be prepared using silver hydroxide

Anastaziya [24]

Answer:

i would have to add and divide

Explanation:

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2 years ago