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3 years ago

What occurs when materials drop out of wind or water?

Chemistry

1 answer:

pantera1 [17]3 years ago

7 0

Erosion weathering decomposition one of those

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How is an exothermic reaction identified on a potential energy diagram?

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3 years ago

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Give the nuclear symbol for the isotope of gallium, ga, that contains 40 neutrons per atom. Replace the question marks with the

Cerrena [4.2K]

The nuclear symbol of an element have three parts namely:

the symbol of an element
mass number of the element
atomic number of the element

The general representation is as:

$_{Z}^{A}X$

where X is the chemical symbol of the element, A is mass number of the element that is total number of neutrons and protons in the nucleus of an atom, and Z is atomic number of the element that is number of protons in the atom.

Element = Gallium, $Ga$ (given)

Number of neutrons = 40 (given)

Let the nuclear symbol be $_{?}^{?}Ga$ . So, we need to determine the values of "?" in the symbol.

Atomic number of Gallium, $Ga$ = 31

Since, atomic number = Number of protons.

So, number of protons of Gallium, $Ga$ = 31

Mass number = number of protons + number of neutrons

Substituting the values:

Mass number = $31+40 = 71$

So, the nuclear symbol is $_{31}^{71}Ga$ .

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3 years ago

The pressure of a 133 ml sample of gas at a constant temperature is decreased from 3.88 atm to 2.96 atm. What is the final volum

Zigmanuir [339]

This concerns Boyle's Law:
P1 * V1 = P2 * V2
V2 = (P1 * V1) / P2
V2 = (3.88 * 133) / 2.96
V2 = 174.3378378378 ml
V2 = 174.34 rounded

Source
http://www.1728.org/boyle.htm

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3 years ago