3 years ago

How are the structure and properties of solids related

1 answer:

5 0

The general properties of solids reflect the orderly arrangement of their particles and the fixed locations of their particles.

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Which statement best reflects a change in weather

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Option A. is the best answer

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How does an increase in temperature affect a chemical reaction??

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An increase in the temperature will speed up the reaction by increasing the frequency and efficiency of the collisions of molecules.

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Determine the velocity of a 55-kg skier whose kinetic energy is 8900 J

goldfiish [28.3K]

Answer:

Kinetic energy = 1/2mv^2

8900 j =1/2*55*v^2

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2 years ago

. How many milliliters of 0.20 M HCl are needed to exactly neutralize 40. milliliters of 0.40 M KOH

Anuta_ua [19.1K]

Answer:

$V_{HCl}=80mL$

Explanation:

Hello,

In this case, for the given reactants we identify the following chemical reaction:

$KOH+HCl\rightarrow KCl+H_2O$

Thus, we evidence a 1:1 molar ratio between KOH and HCl, therefore, for the complete neutralization we have equal number of moles, that in terms of molarities and volumes become:

$n_{HCl}=n_{KOH}\\\\M_{HCl}V_{HCl}=M_{KOH}V_{KOH}$

Hence, we compute the volume of HCl as shown below:

$V_{HCl}=\frac{M_{KOH}V_{KOH}}{M_{HCl}} =\frac{0.40M*40mL}{0.20M} \\\\V_{HCl}=80mL$

Best regards.

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3 years ago

a graduated cylinder (approximate as a regular cylinder) has a radius of 1.045 cm and a height of 30.48 cm. what is the volume o

Luba_88 [7]

Answer: 103.5 cm^3

Explanation:

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3 years ago