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AleksAgata [21]
3 years ago
10

PLs help mweee Ill mark brainliest

Chemistry
1 answer:
Arturiano [62]3 years ago
7 0

the 3rd one is the answer

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A line is perpendicular to<br> y = -3x – 9<br> What is the slope of this<br> perpendicular line?
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Answer:

a. 1/3

In the picture- D. 4

Explanation:

The product of the gradients of perpendicular lines =-1

m1m2=-1

Given an equation of a line in the form y=mx+c, m is the gradient of the line.

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For the question in the picture, y=-1/4x-9, m=-1/4

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3 years ago
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Difference between rapid combustion and spontaneous combustion.
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Rapid combustion is a form of combustion, otherwise known as a fire, in which large amounts of heat and light energy are released, which often results in a flame.Whereas spontaneous combustion is the ignition of organic matter (e.g. hay or coal) without apparent cause, typically through heat generated internally by rapid oxidation.

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1. Convert grams to moles.


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2. Convert millilitres to litres


V = 250.0 \text{mL} \times \frac{\text{1 L}}{\text{1000 mL}} = \text{0.2500 L}\\

3. Calculate the molar concentration (c)


c = \frac{\text{moles}}{\text{litres}} = \frac{\text{0.2875 mol}}{\text{0.2500 L}} = \textbf{1.55 mol/L}



3 0
3 years ago
Read 2 more answers
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