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Leni [432]
3 years ago
7

What 2x+78 if x is 72

Chemistry
2 answers:
satela [25.4K]3 years ago
6 0

Answer:

222

Explanation:

because

2x + 78 = 222

2 (72) + 78

2 x 72 = 144

144 + 78 = 222

Where x is you multiply what x equals by the number on the left of it

Greeley [361]3 years ago
3 0
The answer is -3
2 multiplied by -3 equals -6
And -6+78=72
Hope this helps!
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Answer:

D

Explanation:

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If we look closely at option D, you will notice that sulphur and oxygen combined together to form sulphur dioxide. That is a typical example of chemical synthesis.

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5 0
3 years ago
What mass of CDP (403 g mol−1) is in 10 mL of the buffered solution at the beginning of Experiment 1? 6.4 × 10−4 g 6.4 × 10−3 g
eduard

Compete Question:

What mass of CDP (403 g mol−1) is in 10 mL of the buffered solution at the beginning of Experiment 1?

               Passage: "16 mmol of CDP in 1 L of buffer"

                                       

Answer:

6.4 × 10-2 g  

Explanation:

  Mass = Mole × Molar Mass

   we are given from the question that 16 mmol of CDP is in 1 L of buffer

    this mean that we have 16 × 10^-3 moles of CDP in 1 liter of buffer.

so the mass of CDP in one liter of buffer will be calculate as,

         mass of CDP = 16 × 10^-3 × 403g mol−1

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But because the question

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A gas has a volume of 45.0 mL and a pressure of .98 atm. If the pressure increased to 2.1 atm and the temperature remained the s
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According to Boyle's law, at constant temperature the pressure of a gas is inversely proportional to its volume.

Therefore, formula used to calculate the new volume is as follows.

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Substitute the values into above formula as follows.

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