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vichka [17]
3 years ago
14

If a cylinder holds a volume of 100 cm3, and is 30 cm tall, which is the area of the bottom of the cylinder?

Chemistry
1 answer:
stira [4]3 years ago
4 0
3.33cm squared is the answer
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How many moles of calcium oxide are formed when 3 moles of calcium react with oxygen?
lions [1.4K]

Answer:

3 moles of calcium oxide are formed

Explanation:

Based on the reaction of Calcium Ca, with oxygen, O₂, to produce calcium oxide, CaO is:

2Ca + O₂ → 2CaO

<em>where 2 moles of calcium produce 2 moles of Calcium oxide.</em>

That means, if 3 moles of Ca react in presence of oxygen:

3 moles of calcium oxide are formed

6 0
3 years ago
Which of the following radiation sources provides the greatest radiation dose?
ch4aika [34]
The radiation source that provides the greatest radiation dose is one year of natural background radiation. 
6 0
3 years ago
A sample of an ionic compound containing iron and chlorine is analyzed and found to have a molar mass of 126.8 g/mol. what is th
julsineya [31]
Answer is: <span>the charge of the iron in this compound is +2.
Atomic mass of iron is 55,8 g/mol.
Atomic mass of chlorine is 35,5 g/mol.
If compound is FeCl, molar mass would be 55,8 </span>g/mol + 35,5 g/mol = 91,3 g/mo, that is not correct.
If compound is FeCl₂, malar mass of compound would be:
55,8 g/mol + 2·35,5 g/mol = 126,8 g/mol, that is correct.
Oxaidation number of chlorine is -1.
5 0
3 years ago
Read 2 more answers
18. Describe the relationship between kinetic energy and mass, and give an example of
lidiya [134]

Answer:

Kinetic energy is directly proportional to mass

Explanation:

Kinetic energy is directly proportional to the mass of an object and also directly proportional to the square of the velocity of that object:

E_k = \frac{1}{2} mv^2

Notice that if we keep velocity constant and only increase the mass of a object, the kinetic energy of that object would increase, as we've already emphasized the direct relationship between the kinetic energy term and the mass term.

Let's take a simple example: assume that object 1 and object 2 are both moving at the same velocity but object 1 has a much lower mass than object 2. According to the equation, object 1 has lower kinetic energy. This object can then transform all of its kinetic energy into some other form, say, heat the ground. The heat transferred will be significantly lower than by the object 2 moving at the same velocity but having a much greater mass.

5 0
4 years ago
How do people start alcohol consumption​
Debora [2.8K]

Answer:

Explanation:Due to the mental pressure,

                       Due to peer pressure,

                      Lack of love and affection from the family members.

                      Influence from the T.V advertisement.

                       

6 0
3 years ago
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