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inessss [21]
3 years ago
11

A scientist is observing onion cells and human cheek cells under a microscope.

Chemistry
1 answer:
yKpoI14uk [10]3 years ago
7 0

Answer:

The onion cells have a cell wall and the cheek cells do not.

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1. Calculate the number of moles of carbon dioxide formed when 40.0 moles of oxygen is consumed in the burning of propane. Note
Andrews [41]

Answer:

1. D (24.0 moles CO2)

2. A (.239 moles H2)

Explanation:

1. First Balance the equation

1 C3H8 + 5 O2 ---> 3 CO2 + 4 H2O

Then set up a stoiciometric equation so that the moles of O2 cancel out

40mol O2 x \frac{3 mole CO2}{5 mole O2} = 24.0 moles CO2

2. Set up a stoichiometric equation

10 grams Fe x \frac{1 mole Fe}{55.85 grams Fe} x \frac{4 mole H2}{3 mole Fe} = 0.239 moles H2

6 0
3 years ago
Does a human body use neon???
Anastaziya [24]
 <span>No uses regarding the human body; it's a noble gas and does not react with anything.</span>
3 0
3 years ago
Which quantity can vary among atoms of the same element?
Wewaii [24]
There is this thing called isotopes
it means that atoms of the same element can have a different number of neutrons.
if there is a change in the no. of neutrons, there will definitely be a change in the mass number.

so the answer is A) mass number
7 0
3 years ago
2H2O + 2Na ? 2NaOH + H2 Which of these is a reactant in this chemical reaction?
marin [14]
<h2>Answer:</h2>

Water (H2O) and Sodium (Na) are reactants.

<h2>Explanation:</h2>

2H2O+2Na......2NaOH+H2

In the above reaction the water (H2O) and sodium (Na) are reactants and sodium hydroxide (NaOH) and hydrogen are products.

And this is the single displacement reaction.

8 0
3 years ago
The equation below represents chemical reaction that occurs in living cells. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy How many atoms
KengaRu [80]

Answer:

36

Explanation:

There are 6 Carbon atoms, 12 Hydrogen atoms, and 18 Oxygen atoms.

4 0
3 years ago
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