Law of Conservation of Mass

The image shows an example of what basic chemistry concept?

• Chemical Equation

• Nonsense

• Physical Equation

• Creation of New Matter

Answer explanation

The image likely illustrates a chemical equation, which represents a chemical reaction using symbols and formulas to show the reactants and products involved. This is a fundamental concept in chemistry.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

In the image shown, what are the REACTANTS?

• CO₂

  (Carbon Dioxide)

• H₂O

  (Water)

• C₆H₁₂O₆

  (Glucose)

• O₂

  (Oxygen)

Answer explanation

The reactants in the process of photosynthesis are carbon dioxide (CO₂) and water (H₂O). These substances are used by plants to produce glucose and oxygen, making CO₂ and H₂O the correct reactants.

Tags

NGSS.MS-LS1-6

In the image shown, what are the PRODUCTS?

• CO₂

  (Carbon Dioxide)

• H₂O

  (Water)

• C₆H₁₂O₆

  (Glucose)

• O₂

  (Oxygen)

Answer explanation

The products of photosynthesis are glucose (C₆H₁₂O₆) and oxygen (O₂). Carbon dioxide (CO₂) and water (H₂O) are the reactants, while glucose and oxygen are the end products formed during the process.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What do the subscripts (little numbers) tell you?

• How many atoms of each element there is

• How many molecules there are

• Atomic Mass

• Atomic Number

Answer explanation

Subscripts indicate the number of atoms of each element in a chemical formula. For example, in H2O, the '2' means there are two hydrogen atoms. This is why the correct answer is 'How many atoms of each element there is'.

Tags

NGSS.MS-PS1-1

What do the coefficients (BIG numbers) tell you?

• How many atoms of each element there is

• How many molecules there are

• Atomic Mass

• Atomic Number

Answer explanation

The coefficients in a chemical equation indicate how many molecules of each substance are involved in the reaction. Therefore, they tell you how many molecules there are, making this the correct choice.

In a chemical equation, the ARROW will always point to what?

• Products

• Reactants

• Up

• Down

Answer explanation

In a chemical equation, the arrow indicates the direction of the reaction. It always points to the products, which are the substances formed as a result of the reaction, distinguishing them from the reactants.

Tags

NGSS.MS-PS1-5

Click on all of the reactants (pay attention to the arrow).

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Click on all of the products (pay attention to the arrow).

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

NGSS.MS-LS1-6

What does the number ₃ represent in 4NH₃?

• Subscript

• Superscript

• Coefficient

Answer explanation

In the formula 4NH₃, the number 3 is a subscript, indicating that there are three hydrogen atoms bonded to one nitrogen atom in each ammonia molecule. Therefore, the correct answer is 'Subscript'.

Tags

NGSS.MS-PS1-1

What does the number 4 represent in 4NH₃?

• Subscript

• Superscript

• Coefficient

Answer explanation

In the formula 4NH₃, the number 4 is a coefficient indicating that there are four molecules of ammonia (NH₃). It shows the quantity of the compound rather than the number of atoms, which would be represented by subscripts.

Tags

NGSS.MS-PS1-1