Ca(s)+2Hcl(aq) ------>CaCl2(s)+H2(g)
The answer is (c.) There is a dense, positively charged mass in the center of an atom
In 1899, Ernest Rutherford, a British physicist conducted a study of the absorption of radioactivity by thin sheets of metal foil. On this experiment, he concluded that all the positive charge and the mass of the atom is concentrated in a small fraction of the total volume of the atom which is called the Nucleus.
Answer:
The chemical element neon is classed as a noble gas and a nonmetal. It was discovered in 1898 by William Ramsay and Morris Travers.
Yes neon is a magnetic
-248.6 °C
Neon/Melting point
Answer:
Ridges
Explanation:
Ridges separate watersheds
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Answer:
The pressure inside the container is 6.7 atm
Explanation:
We have the ideal gas equation: P x V = n x R x T
whereas, P (pressure, atm), V (volume, L), n (mole, mol), R (ideal gas constant, 0.082), T (temperature, Kelvin)
Since the container is evacuated and then sealed, the volume of the body of gas is the volume of the container.
So we can calculate the pressure by
P = n x R x T / V
where as,
n = 41.1 g / 44 g/mol = 0.934 mol
Hence P = 0.934 x 0.082 x 298 / 3.4 L = 6.7 atm