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Paul [167]
2 years ago
7

Which of the following is not a type of energy

Chemistry
2 answers:
Usimov [2.4K]2 years ago
8 0
C. Heat answer correct that
kirill115 [55]2 years ago
3 0
C is the correct answer
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Find the molar mass of potassium dichromate, K2Cr2O7
prisoha [69]
The molar mass of K is 39, Cr is 52, and O is 16. The rough calculation of these numbers are 294. 
6 0
3 years ago
2Fe + 6HCl -> 2FeCl3 + 3H2 If 7.0 moles of HCl is added to enough iron that the HCl is completely used up, how many
DENIUS [597]

Answer: 3.5 moles of hydrogen gas will be produced.

Explanation:

The balanced chemical equation is:

2Fe+6HCl\rightarrow 2FeCl_3+3H_2

As HCl gets completely used up, HCl is the limiting reagent.

According to stoichiometry :

6 moles of HCl produces =  3 moles of H_2

Thus 7.0 moles of  HCl produces=\frac{3}{6}\times 7.0=3.5moles  of H_2

 Thus 3.5 moles of hydrogen gas will be produced.

3 0
2 years ago
Graduated cylinder is filled to 41.5mL with water, and a price of granite is placed in the cylinder displacing the level to 47.6
Y_Kistochka [10]

Answer:

6.1 cm³

Explanation:

To solve this problem we first need to keep in mind <em>Archimedes' principle</em>:

  • The volume of water (or any fluid) displaced by a submerged object is equal to the object's volume.

With that in mind we <u>calculate the volume of the granite piece in mililiters</u>:

  • Volume displaced = 47.6 mL - 41.5 mL = 6.1 mL
  • Volume of the granite piece = 6.1 mL

Given that one cubic centimeter is equal to one mililiter, the volume of the granite piece in cm³ is 6.1 cm³.

8 0
3 years ago
What is the volume of 8.80 g of CH4 gas at STP?
Ann [662]

Answer:

12.32 L.

Explanation:

The following data were obtained from the question:

Mass of CH4 = 8.80 g

Volume of CH4 =?

Next, we shall determine the number of mole in 8.80 g of CH4. This can be obtained as follow:

Mass of CH4 = 8.80 g

Molar mass of CH4 = 12 + (1×4) = 12 + 4 = 16 g/mol

Mole of CH4 =?

Mole = mass/Molar mass

Mole of CH4 = 8.80 / 16

Mole of CH4 = 0.55 mole.

Finally, we shall determine the volume of the gas at stp as illustrated below:

1 mole of a gas occupies 22.4 L at stp.

Therefore, 0.55 mole of CH4 will occupy = 0.55 × 22.4 = 12.32 L.

Thus, 8.80 g of CH4 occupies 12.32 L at STP.

6 0
3 years ago
Out of magnesium and Calcium which element is more reactive give reason​
SIZIF [17.4K]

Answer:

Calcium is more reactive.

Explanation:

It is higher in the reactivity series, and contains more energy levels.

5 0
3 years ago
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