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Leviafan [203]
4 years ago
9

Why does filling a balloon with baking soda, getting a cup and put vinegar it in, and mix them together, represent a closed syst

em
Chemistry
1 answer:
AleksAgata [21]4 years ago
7 0
Because there is a balloon to stop everything from coming out
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1. Which of the following statements is true about seeds?
juin [17]

Answer:

1 ans:  d. all seeds has young plant, stored food and a seed coat.

2 ans: d. the right pollen is placed on their stigmas

3 ans: a. pollen grain falls on a pistil

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4 0
3 years ago
8.45 cm - 3.55 cm = ?
lyudmila [28]

Answer:

4.9cm or 4.90cm

Explanation:

Use column method and align the numbers. Make sure you add the decimal point before you write the answer, otherwise the value would be wrong.

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3 years ago
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Convert the following measurements using dimensional analysis. Set up problem using factors. Cross out the units that cancel. YO
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Answer:

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Explanation:

4 0
3 years ago
2. What is a product?
zysi [14]

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"food products"

2.

a thing or person that is the result of an action or process.

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6 0
3 years ago
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You may recall that the products of the complete combustion of a
Vesna [10]

Answer: CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)

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Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

This is an example of combustion reaction in which hydrocarbon reacts with oxygen to form carbon dioxide and water. This is an exothermic reaction in which a large amount of heat is liberated, thus water also exists as vapors.

CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)

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3 years ago
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