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Natalka [10]
3 years ago
13

Help me with this please!!! Smart ones help me 18 points

Chemistry
2 answers:
Temka [501]3 years ago
7 0
1/2 is the odds of picking a quarter.  Since there are 3 quarters and 3 dimes, add them together and you get 6.  3/6 is equal to 1/2.
Helen [10]3 years ago
4 0
Hey! The answer would be 1/2.
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Calculate the mass of water produced when 2.06 g of butane reacts with excess oxygen.
dem82 [27]
2C4H10 + 13O2 = 8CO2 + 10H2O

1. (2.06g C4H10)/(58.12 g/mol C4H10) = 0.035mol C4H10

2. (0.035molC4H10)(10 mol H2O/2mol C4H10) = 0.177mol H2O

3. (0.177mol H2O)(18.01g/mol H2O) = 3.19g H2O
8 0
3 years ago
A solid, pure substance containing just carbon and hydrogen is found to contain 35.8g of carbon and 3.72 g of hydrogen. how many
Igoryamba

Answer:

            4.36 g of Carbon

Solution:

Step 1: Calculate the %age of Carbon in given Solid as;

                        Mass of Carbon  =  35.8 g

                        Mass of Hydrogen  =  3.72

                        Total Mass  =  35.8 g + 3.72  =  39.52 g

                        %age of Carbon  =  (35.8 g ÷ 39.52 g) × 100

                        %age of carbon  =  90.58 %

Step 2: Calculate grams of Carbon in 4.82 g of given solid as;

                        Mass of Carbon  =  4.82 g × (90.58 ÷ 100)

                        Mass of Carbon  =  4.36 g

3 0
3 years ago
Hello, Flashligh explain where the energy comes from and how it is affecting change or putting an object in motion
dangina [55]

Answer:

Our energy supply comes mainly from fossil fuels, with nuclear power and renewable sources rounding out the mix.

The energy associated with an object's motion is called kinetic energy. Kinetic energy is the energy of motion. All moving objects have kinetic energy

Explanation:

7 0
3 years ago
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How many moles of nitroglycerin were in the container originally?
Gemiola [76]

Answer:

4.75

Explanation:

I hope this helped!

7 0
2 years ago
A student mixed two chemicals to allow them to
Westkost [7]

Answer:

B .it is an exothermic reaction

Explanation:

i need brainleyest

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2 years ago
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