Chemical Formulas Quiz

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Questions and Answers

What does a chemical formula provide information about?

  • Chemical names
  • Chemical structures
  • Chemical reactions
  • Proportions of atoms in a compound or molecule (correct)

Which of the following is not included in a chemical formula?

  • Parentheses
  • Chemical names (correct)
  • Superscripts
  • Plus (+) and minus (−) signs

What do empirical formulae indicate?

  • Chemical structures
  • Molecular formulae
  • Simple numbers of each type of atom in a molecule (correct)
  • Full chemical structural formulae

In a molecular formula, what kind of information is provided?

<p>Numerical proportions of atoms of each type (C)</p> Signup and view all the answers

What is the molecular formula for glucose?

<p>C6H12O6 (B)</p> Signup and view all the answers

What is the minimum number of non-zero coefficients required to form a meaningful linear equation?

<p>1 (A)</p> Signup and view all the answers

How many solutions does a linear equation with just one variable have?

<p>Exactly one (A)</p> Signup and view all the answers

What geometric shape do the solutions of a linear equation in two variables form in the Euclidean plane?

<p>Line (C)</p> Signup and view all the answers

What does a linear equation with two variables represent in terms of the Cartesian coordinates?

<p>Point in the Euclidean plane (C)</p> Signup and view all the answers

What are the coefficients in a linear equation often considered as?

<p>Parameters (B)</p> Signup and view all the answers

What is the format of the slope-intercept form?

<p>y = mx + b (where m = slope and b = y-intercept) (A)</p> Signup and view all the answers

What do we need to rearrange the equation to when converting it to slope-intercept form?

<p>Rearrange the equation so that y is on one side by itself (C)</p> Signup and view all the answers

What does the variable 'm' represent in the slope-intercept form?

<p>Slope (D)</p> Signup and view all the answers

Flashcards

Chemical Formula

Shows the proportions of atoms in a compound or molecule.

Empirical Formula

Indicates the simplest, whole-number ratio of each type of atom in a molecule.

Molecular Formula

Provides the actual number of atoms of each type in a molecule.

Molecular formula information

Numerical proportions of atoms of each type

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Linear Equation

A mathematical statement where the highest power of the variable is 1.

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Minimum non-zero coefficients

At least one coefficient must be non-zero to avoid a trivial equation.

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Solutions for single variable

Exactly one solution that satisfies the equation.

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Linear Equation Graph

Solutions form a straight line when graphed on a coordinate plane.

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Coefficients as Parameters

They determine the slope and position of the line.

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Slope-Intercept Form

y = mx + b, where 'm' is slope and 'b' is the y-intercept.

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Rearranging to Slope-Intercept Form

Isolate 'y' on one side of the equation to easily identify slope and y-intercept.

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Slope

The rate of change of the line or steepness.

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