Answer:
A channel in an ancient Martian "riverbed" wasn't carved by liquid water but was built by molten lava, according to a new study of surface features on Mars. ... On Earth, lava tubes form during sustained volcanic eruptions, when lava flowing through previously solidified masses leaves behind empty channels in the rock
Explanation:
The lava, itself (when liquid) is very much above the boiling point of water, so it is not wet with liquid water, so it's a no in that sense,' he writes. ... Lava does contain a lot of water, especially prior to eruption (when it's called magma), but also as it flows across the ground,' he explained.
B. All atoms of silver have the same atomic number but different numbers of neutrons in the nucleus.
B. The nucleus of an atom contains protons and neutrons.
The molecular formula:
The molecular formula is N₂O₄.
<span>Avogadro's number
represents the number of units in one mole of any substance. This has the value
of 6.022 x 10^23 units / mole. This number can be used to convert the number of
atoms or molecules into number of moles.
</span><span>7.3x10^-3 g of CaSO4 ( 1 mol / 136.14 g ) = 5.36x10^6-5 moles
</span> 5.36x10^6-5 moles ( 6.022 x 10^23 formula units / mole ) = 3.23x10^19 formula units