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slamgirl [31]
3 years ago
15

Which word equation shows hydrogen reacting with oxygen to form water?

Chemistry
1 answer:
Karo-lina-s [1.5K]3 years ago
3 0
2H₂ + O₂ = 2H₂O
_______________________
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What is the current produced when a 12-Volt battery encounters a resistance of 20 Ohms?
Verdich [7]

Answer:

Explanation:

V = IR

I = V/R

I = (12V)/(20Ω)

I = 0.6 A

4 0
3 years ago
The concentrated sulfuric acid we use in the laboratory is 98.0% sulfuric acid by weight. Calculate the molality and molarity of
timama [110]

Answer : The molarity and molality of the solution is, 18.29 mole/L and 499.59 mole/Kg respectively.

Solution : Given,

Density of solution = 1.83g/cm^3=1.83g/ml

Molar mass of sulfuric acid (solute) = 98.079 g/mole

98.0 % sulfuric acid by mass means that 98.0 gram of sulfuric acid is present in 100 g of solution.

Mass of sulfuric acid (solute) = 98.0 g

Mass of solution = 100 g

Mass of solvent = Mass of solution - Mass of solute = 100 - 98.0 = 2 g

First we have to calculate the volume of solution.

\text{Volume of solution}=\frac{\text{Mass of solution}}{\text{Density of solution}}=\frac{100g}{1.83g/ml}=54.64ml

Now we have to calculate the molarity of solution.

Molarity=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{volume of solution}}=\frac{98.0g\times 1000}{98.079g/mole\times 54.64ml}=18.29mole/L

Now we have to calculate the molality of the solution.

Molality=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Mass of solvent}}=\frac{98.0g\times 1000}{98.079g/mole\times 2g}=499.59mole/Kg

Therefore, the molarity and molality of the solution is, 18.29 mole/L and 499.59 mole/Kg respectively.

7 0
3 years ago
Calculate the molarity of a kcl solution prepared by dissolving 0.898 moles of kcl in 250. ml of water
prohojiy [21]
  the molarity  of KCl  solution prepared by dissolving 0.898 mole of KCl in 250 ml water  is calculated using the below  formula

 molarity= moles/volume in liters

moles= 0.898 moles
volume in liters= 250/1000 =0.25 liters

molarity is therefore= 0.898/0.25= 3.592 M
3 0
3 years ago
Which of the following elements may occur in the greatest number of different oxidation states?
Alex73 [517]
A C that is carbon that occur in greatest number of different oxidation zones

7 0
3 years ago
The measurement of how fast an object moves over a certain amount of time.
Oksanka [162]
Its usually never the obvious one.. so cross speed out & put A. Velocity.

3 0
3 years ago
Read 2 more answers
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