I do need immediate answers, this is taking a bit of time for me to figure out a shiny silver spoon became dull and black over time. What most likely happened to the spoon?

A. The metal mixture began to separate

B. The metal reacted with air to form a new substance

C. Dirt collected on the shiny metal

D. The metal dissolved into a black tarnish

Chemical because water + metal = rust. ... Chemical because carbon dioxide gas was produced - bubbles. You take out your best silver spoons and notice they are very dull and have some black spots. Chemical because the color change is tarnish.

Explanation:

:)

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer