Based on the periodic table, what do we now call the element mendeleev called eka-manganese?

Technetium

Explanation:

The Mendeleev element called eka-manganese is now called Technetium.

Technetium is a crystalline, silver and radioactive metal, very similar to platinum. It serves as a gamma ray source of beta particles. Most of the technetium produced on Earth is a byproduct of uranium-235 fission in nuclear reactors and is extracted from nuclear fuel rods. No isotope of technetium has a half-life of more than 4.2 million years, so its detection in 1952 helped reinforce the theory that stars can produce heavier elements.

the answer is a. co2, this would be colder than the : )

explanation:

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm