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3 years ago

Una muestra de 0,830 g de MgCl2 se disuelve en 350 g de agua. Si la densidad de la disolución es 1,09 g/mL

Chemistry

1 answer:

geniusboy [140]3 years ago

8 0

Answer:

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What is the mass of 6.78x1050 molecules of NaCl

ryzh [129]

Answer:

Explanation:

Molar mass of NaCl= 58.44 gm

So we got it that,

58.44 mass of NaCl contain = 6.023*10^23 molecules of Na Cl

x mass will contain = 6.78*10^50

by cross multiplication , we get

x= 58.44*(6.78*10^50)/ 6.023*10^23

x= 65.785 * 10^27 molecules

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3 years ago

What percentage of boys Chose walking

mafiozo [28]

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exis [7]

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3 years ago

Which physical property of the water changes when it reaches its melting point

KiRa [710]

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3 years ago

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An enzyme is discovered that catalyzes the chemical reaction SAD ↔ HAPPY A team of motivated researchers sets out to study the e

Pepsi [2]

Answer:

The $K_{m}$ of a substrate will be "10 μM".

Explanation:

The given values are:

$E_{t} = 20 \ nM$

$[Substract] = 40 \ \mu M$

$K_{cat}=600 \ s^{-1}$

Reaction velocity, $Vo=9.6 \ \mu M s^{-1}$

As we know,

⇒ $Vo=\frac{K_{cat}[E_{t}][S]}{K_{m}+[S]}$

On putting the estimated values, we get

⇒ $9.6=\frac{600\times 20\times 10^{-3}\times 40}{K_{m}+40}$

⇒ $K_{m}+40=\frac{600\times 20\times 10^{-3}\times 40}{9.6}$

⇒ $K_{m}+40=50$

On subtracting "40" from both sides, we get

⇒ $K_{m}+40-40=50-40$

⇒ $K_{m}=10 \ \mu M$

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3 years ago