It involved knots in strings called quipu. The quipu was not a calculator, rather it was a storage device. Remember that the Incas had no written records and so the quipu played a major role in the administration of the Inca empire since it allowed numerical information to be kept.
HBr (aq) is an Arrhenius acid.
The equation is <span>HBr(aq) -> H+ + Br-</span><span> </span>
Answer:
<h2>0.58 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula
![Density = \frac{mass}{volume}](https://tex.z-dn.net/?f=Density%20%3D%20%20%5Cfrac%7Bmass%7D%7Bvolume%7D%20)
From the question
volume = 15 mL
mass of object = 8.7 g
We have
![Density = \frac{8.7}{15}](https://tex.z-dn.net/?f=Density%20%3D%20%20%5Cfrac%7B8.7%7D%7B15%7D%20)
We have the final answer as
<h3>0.58 g/mL</h3>
Hope this helps you
Water: pH7
Lemon juice:pH2
Milk: pH6.5
Vinegar: pH2.4
Washing up liquid: pH5-6
:)
I think the answer is e? That's if o is -2 if not it will be a