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Name ___________________ period _____
8th grade DO NOW
WEEK 5
8.5D Recognize that chemical formulas are used to identify substances and determine the number of atoms of each element in chemical formulas containing subscripts.
Use the chemical reaction below for each of the next questions.
Date ______________
The reaction above shows what happens when barium nitrate and sodium chloride are mixed. According to the chemical reaction, how many atoms of oxygen are found on the product side of the equation?
1. Underline the question.
2. Box the important vocabulary words.
3. Tell something else you know about this topic.
_________________________________________
_________________________________________
4. Answer the question in the space below.
Date _______________
In the reaction of barium nitrate and sodium chloride shown how many molecules of sodium chloride are found on the reactant side of the equation?
1. Underline the question.
2. Box the important vocabulary words.
3. Tell something else you know about this topic.
_________________________________________
_________________________________________
4. Answer the question in the space below.
Date ______________
When barium nitrate and sodium chloride are mixed together they produce barium chlorite and sodium nitrite. What is the total number of atoms in the chemical formula of barium chlorite (BaCl2)?
1. Underline the question.
2. Box the important vocabulary words.
3. Tell something else you know about this topic.
_________________________________________
_________________________________________
4. Answer the question in the space below.
Date _______________
Some chemical formulas contain subscripts. The subscripts tell us how many atoms of each element are found in the molecule. How many atoms are in each element of the chemical formula C8H9NO2?
1. Underline the question.
2. Box the important vocabulary words.
3. Tell something else you know about this topic.
_________________________________________
_________________________________________
4. Answer the question in the space below.
Date _____________
Many chemical formulas have coefficients in front of them. This tells us the number of molecules of that compound we have. If you have a coefficient in front of the formula you must multiply the number of atoms in the formula times the coefficient to get the total number of atoms. How many atoms are in each element of the chemical formula 2Fe2O3?
1. Underline the question.
2. Box the important vocabulary words.
3. Tell something else you know about this topic.
_________________________________________
_________________________________________
4. Answer the question in the space below
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