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umka21 [38]
3 years ago
9

An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% ab

undant. What is the average atomic mass? What element is it?
Chemistry
1 answer:
qwelly [4]3 years ago
5 0

Answer:

10.81, Boron

Explanation:

I love the explanation Khan Academy gives.

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Which salt is produced when NH4OH reacts with HNO3?<br> KNO2<br> NaNO3<br> NH4NO3<br> NH4NO2
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NH4NO3 is the answer

Explanation:

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What are even covalent chlorides? Question D
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The chlorine atom (or atoms) is covalently bonded by a shared pair of electrons to the other element.

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Filtering air to remove dust and pollen is it chemical or physical change
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Physical Change

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Because the filter is removeing the dust by having the air go though a thin material.

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3 years ago
Write the symbol for every chemical element that has an atomic number less than 13 and atomic mass greater than 19.3 u
emmainna [20.7K]

Answer:

The symbol of each element is, Ne, Na, Mg, and Al.

Explanation:

Below is the list of elements that has an atomic mass of less than 19.3 u.

The atomic mass of Neon is 20.1797 u and the atomic number is 10.

The atomic mass of Sodium is 22.989769 u and the atomic number is 11.

The atomic mass of Magnesium is 24.305 u and the atomic number is 12.

The atomic mass of Aluminium is 26.981539 u and the atomic number is 13.

Here, the symbol of each element is, Ne, Na, Mg, and Al.

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4 years ago
Conversion factors are useful in solving problems in which a given measurement must be expressed in
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Conversion factors are useful in solving problems in which a given measurement must be expressed in some other units of measure.


Conversion factors
are helpful in solving issues where one unit of measurement needs to be expressed in another. In general, a measurement's numerical value changes when it is multiplied by a conversion factor, while the quantity being measured's real size stays the same.
A conversion factor is a number that is used to multiply or divide one set of units into another. If a conversion is required, it must be done using the correct conversion factor to get an identical value. For instance, 12 inches equals one foot when converting between inches and feet.

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2 years ago
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