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2 years ago

Select three (3) types of waves that can be harmful to life.

Chemistry

2 answers:

pychu [463]2 years ago

7 0

Answer:

opt a f g is correct answer ok

zubka84 [21]2 years ago

7 0

Answer:

x-rays,gamma rays and ultraviolet rays are harmful to life.

Explanation:

hope this will hep you!

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Write down any two test for the CH2=CH2[ethene]

Assoli18 [71]

Answer:

a) Linear polymerization

b) cyclic polymerization

7 0

3 years ago

How many protons and neutrons does gallium have?

Phoenix [80]

31 protons 31 electrons and 39 nutrons

4 0

3 years ago

Naturally occurring element X exists in three isotopic forms: X-28 (27.979 amu, 92.21% abundance), X-29 (28.976 amu 4.70% abunda

bezimeni [28]

Answer: The average atomic mass of X is 28.09 amu

Explanation:

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$ .....(1)

For isotope 1:

Mass of isotope 1 = 27.979 amu

Percentage abundance of isotope 1 = 92.21 %

Fractional abundance of isotope 1 = 0.9212

For isotope 2:

Mass of isotope 2 = 28.976 amu

Percentage abundance of isotope 2 = 4.70 %

Fractional abundance of isotope 2 = 0.0470

For isotope 3:

Mass of isotope 3 = 29.974 amu

Percentage abundance of isotope 3 = 3.09 %

Fractional abundance of isotope 3 = 0.0309

Putting values in equation 1, we get:

$\text{Average atomic mass of X}=[(27.979\times 0.9212)+(28.976\times 0.0470)+(29.974\times 0.0309)]$

$\text{Average atomic mass of X}=28.09amu$

Hence, the average atomic mass of X is 28.09 amu

4 0

3 years ago

What is the mole-to-mole ratio between N2 and H2?

spin [16.1K]

Remember, look at the coefficients in the balanced equation! Here are three mole ratios:
1 mole N2 / 3 moles H2.
3 moles H2 / 2 moles NH3.

5 0

3 years ago

I need help on this one pliz

Artyom0805 [142]

The answer would be 16.04.

8 0

3 years ago