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4 years ago

Molecules and atoms. which is more massive: an atom, a molecule, an isotope, or an ion?

1 answer:

5 0

(a) atom or molecule: From these choices, the more massive one will have to be the molecule. This is because a molecule is composed of two or more atoms making it weigh more.

(b) an isotope or ion: For these choices, the more massive element would be the isotope. This is because an isotope will have more neutron than compound while that of the ion will only have additional or lacking electron. An electron is very much lighter than neutrons.

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Determine the potential deaths resulting from the following exposure to chlorine:

jekas [21]

Answer:

For each scenario as following:

A. 3 Potential deaths by chlorine exposure

B. 1 Potential deaths by chlorine exposure

C. 3 Potential deaths by chlorine exposure

Explanation:

According to Freitag, 1941 Chlorine exposure can be lethal at the concentration of 34-51 ppm in a time of 1h-1.5h. The answers are based on his reference.

6 0

4 years ago

An element crystallizes in a face-centered cubic lattice. If the length of an edge of the unit cell is 0.408 nm, and the density

V125BC [204]

Answer:

Explanation:

For the density of a face-centered cubic:

$Density = \dfrac{4 \times M_w}{N_A \times a^3}$

where

$M_w$ = molar mass of the compound

$N_A=$ avogadro's constant

$a^3 =$ the volume of a unit cell

Given that:

Density $(\rho)$ = 19.30 g/cm³

a = 0.408 nm

a = $0.408 \times 10^{-9} \times 10^{2} \ cm$

a = $4.08 \times 10^ {-8} \ cm$

∴

$19.3 = \dfrac{4 \times M_w}{(6.023 \tmes 10^{23})\times (4.08 \times 10^{-8})^3}$

$M_w= \dfrac{19.3\times (6.023 \times 10^{23})\times (4.08 \times 10^{-8})^3}{4}$

$M_w=197.37 \ g/mol$

Thus, the molar mass of 197.37 g/mol element is Gold (Au).

4 0

3 years ago

1s2 2s2 2p6 3s2 3p6 is the electron configuration for

kvasek [131]

Answer: The electron configuration is for the element Argon

Explanation: 3p6 is all the way on the right side of the periodic table in the third row or period

3 0

4 years ago

Read 2 more answers

Why do health care professionals limit the number of radiation treatments that a person can be given

katovenus [111]

Radiation is s very powerful substance and can cause major health problems do the health care professionals limit the use to help not create sickness

6 0

4 years ago

Which of the following produces a physical change in the shape of an object?

bogdanovich [222]

Answer:Any change that occurs without altering the chemical composition of a substance is a physical change. Physical changes can include changing the color, shape, state of matter, or volume of a substance. It is crucial to remember that physical changes never alter the chemical makeup.

Explanation:

i hope that helps u try to figure it out a little bit sorry i couldn't find your answer i didn't have much to go off of

8 0

3 years ago