What would you predict about a chemical that has a hydrogen ion concentration of 1 x 10 to the -12 power m? it will form salt and water when added to a base it contains no hydroxide ions it has high concentration of hydroxide ions it has a sour taste

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It has high concentration of hydroxide ions.

Explanation:-

Given hydrogen ion concentration [H+] = 1 x 10^-12 M

Using the formula

pH = - log [H+]

= - log [1 x 10^-12]

= 12

Since the pH is above 7 the chemical is a base.

A base has a high concentration of hydroxide ions.

the maximum mass of nh3 is nh3 in grams

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.