3 years ago

The melting point of table salt is 801 degrees celsius. is this a physical or chemical property?

1 answer:

5 0

It is a Physical property because like water it changes into a ice cube but it can be melted into water or be turned back into an ice cube.

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Gold has a molar mass of 197.0 g/mol. What is the concentration of gold in seawater in moles per liter?(please show work)

natka813 [3]

Answer:

Since you didnt get asked for a spefic weight of gold lets assume it was 5g

Explanation:

5g Au/197 =.02538 mols in 1 liter of sea water is

.02538/1L which gives you a Molarity of .012538 assuming 5g if they ask for a different number just replace 5 with any weight in grams

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3 years ago

Silicon has 2 isotopes, Silicon-28 with an abundance of 90% and Silicon-30 with an abundance of 10%. Find the AAM for Silicon.

JulsSmile [24]

Answer:

RAM

$RAM = (mass \: of \: ^{28} Si \: \times \%abundance) + (mass \: of \: ^{30} Si \: \times \%abundance) \\ RAM = (28 \times 90\%) + (30 \times 10\%) \\ RAM = 25.2 + 3 \\ RAM = 28.2$

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3 years ago

What does ''Isotope'' means? &from which language that drives from? answer to me then you will have 20 points help me then y

coldgirl [10]

Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number. All isotopes of a given element have the same number of protons but different numbers of neutrons in each atom.

The term isotope is formed from the Greek roots isos ("equal") and topos ("place"), meaning "the same place".

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4 years ago

At what distance from Earth are weather maps drawn?

-Dominant- [34]

Answer:

10^5 meters

Explanation:

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4 years ago

Which of the following molecules contains a polar covalent bond?

jek_recluse [69]

Answer:

ummm well you have to go to school I

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2 years ago