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Black_prince [1.1K]
2 years ago
14

Determine the formula weight of caffeine, C₈H₁₀N₄O₂. Provide an answer to two decimal places.

Chemistry
2 answers:
arlik [135]2 years ago
5 0

Let's find

\\ \tt\hookrightarrow C_8H_10N_4O_2

  • We need accurate mass

\\ \tt\hookrightarrow 8(12.011)+10(1.007)+4(14.006)+2(16.0)

\\ \tt\hookrightarrow 96.088+10.07+56.024+32.0

\\ \tt\hookrightarrow 196.182g/mol

\\ \tt\hookrightarrow 196.18g/mol\:or 196.18u

Rashid [163]2 years ago
5 0

Answer:

IPO you have to be a Goodgood of you

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You multiply the number by 1000 when you convert a measurement from kilometres to metres.

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1 <em>kilo</em>metre means 1 metre <em>×1000</em>.

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2 years ago
Which compound in each pair is more soluble in water?(b) Calcium phosphate or magnesium phosphate
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<u>larger is the value of </u>Ksp<u> the higher will the solubility of solid in water.</u>

What is called compound?

  • In chemistry, a compound is a substance made up of two or more different chemical elements combined in a fixed ratio.
  • When the elements come together, they react with each other and form chemical bonds that are difficult to break.
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The equation for the dissociation of a solid MX in water is given below

MX(s) ⇄ Mⁿ⁺(aq) + Xⁿ⁻ (aq)

Assume s be the solubility of MX in pure water, then the equilibrium concentrations of ions are

[ Mⁿ⁺] = s

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The expression for the solubility product constant (Ksp) is as follows

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That is, larger is the value of Ksp the higher will the solubility of solid in water.

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6 0
1 year ago
Identify the variables in the investigation: An investigation was done with an electromagnetic system made from a battery and wi
kondaur [170]

Answer:

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Dependent: number of paper clips

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A dependent variable is defined as a variable which is affected when the independent variable is changed by the researcher or the experimenter. It depends greatly upon the independent variable.

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In the context,

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