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10-6 moles/dm3 concentration of H+ ions means pH=6, a weak acidic solution.

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What is the volume of mars the planet?

163180000000 cubic km (1.63 x 1011 km3). About 15% the volume of Earth.


The distance between the earth and the sun is about 1.5 x 1011 m Express this with an SI prefix and in kilometers?

1.5 x 1011 meters = 1.5 x 108 kilometers


How many gold atoms are there in a sphere that is 13 in diameter?

I will use the volume of a sphere formula and the density of gold to find this answer. The radius of gold is 144 picometers. 13 inches (2.54 centimeters/1 in)(1 meter/100 centimeters)(1012 picometers/1 meter) = 3.30 X 1011 picometers --------------------------------/2 = 1.65 X 1011 picometers in radius of this sphere =================================So, that means that the radius of the gold would be as to the sphere..., 1.65 X 1011 picometers/144 picometers = 1.15 X 109 picometers of gold radius here =======================================================( final answer )


How many times can Venus fit into earth?

Venus is only very slightly smaller than the Earth. The Earth is 10.83×1011 km3 compared to Venus' 9.38×1011 km3. To find out how times Venus goes into Earth you just divide the volume of the Earth by the volume of Venus. Like this: 10.83×1011/9.38×1011 =~ 1.15 times. That's between one and one seventh and one and one sixth.


How many number of stars?

Just in our galaxy - the Milky Way - there are several hundred billion stars. In the visible Universe, there are hundreds of billions of galaxies. It is not currently known how far the Universe extends, beyond the visible limits. A rough estimate, then, would be that there are 1011 x 1011 = 1022 stars (a one with 22 zeroes, that is), just in the visible Universe - the part that our instruments can reach in theory.