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3 years ago

Which condition applies when water boils at 100oC

Chemistry

1 answer:

VLD [36.1K]3 years ago

5 0

An ambient pressure of 1 atm

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Compared to an atom of C-12, an atom of C-14 has

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Explanation:

Carbon-12 atoms have stable nuclei because of the 1:1 ratio of protons and neutrons.

Carbon-14 atoms have nuclei which are unstable. C-14 atoms will undergo alpha decay and produce atoms of N-14. Carbon-14 dating can be used to determine the age of artifacts which are not more than 50,000 years old.

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3 years ago

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2 years ago

What processes contribute water to surface water sources?(science)

GrogVix [38]

Of the many processes involved in the water cycle, the most important are evaporation, transpiration, condensation, precipitation, and runoff. Although the total amount of water within the cycle remains essentially constant, its distribution among the various processes is continually changing.

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2 years ago

Arrange the following elements in order of decreasing electronegativity:

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Answer:

Be,Mg,Ca,Sr,Ba.Ra[down the group electronegativity is decreasing]

Explanation:

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3 years ago

1.505 times 10^23 Na atoms

dybincka [34]

5.75g

Explanation:

Given parameters:

Number of atoms = 1.505 x 10²³atoms

let us find the number of moles and mass of this atom.

Solution:

The mole is convenient unit for reporting measurements in chemistry. It allows us to make mathematical calculations:

one mole of substance contains 6.02 x 10²³atoms

Number of moles of Na given = $\frac{1.505 x 10^{23} }{6.02 x 10^{23} }$ = 0.25moles

Mass of Na atom given = number of moles x molar mass

Molar mass of Na= 23g/mole

Mass of Na = 0.25 x 23 = 5.75g

learn more:

Number of moles brainly.com/question/1841136

#learnwithBrainly

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3 years ago