3 years ago

Electromagnetic waves that are harmful to living things are

Chemistry

1 answer:

Westkost [7]3 years ago

5 0

B. both high energy and low energy waves

You might be interested in

In which region is the substance in both the solid phase and the liquid phase? 1 2 3 4

elena-14-01-66 [18.8K]

It’s 3 because iv done this before

4 0

3 years ago

Place the following in order of increasing molar entropy at 298 K.

Genrish500 [490]

Answer:

SO < CO2 < C3H8

Explanation:

Entropy refers to the degree of disorderliness of a system. The standard molar entropy of a substance refers to the entropy of 1 mole of the substance vunder standard conditions.

The molar entropy depends on the number of microstates in the system which in turn depends on the number of atoms in the molecule.

C3H8 has 11 atoms and hence the highest number of microstates followed by CO2 having three atoms and least of all SO having only two atoms.

3 0

3 years ago

The radius of a vanadium atom is 130 pm. How many vanadium atoms would have to be laid side by side to span a distance of 1.30 m

monitta

Answer:

5 000 000 (5 million atoms)

Explanation:

Let us assume that a vanadium atom has a spherical shape.

diameter of a sphere = 2 x radius of the sphere

Thus,

Radius of a vanadium atom = 130 pm

= 130 x $10^{-12}$ m

The diameter of a vanadium atom = 2 x radius

= 2 x 130 x $10^{-12}$

= 260 x $10^{-12}$ m

Given a distance of 1.30 mm = 1.30 x $10^{-3}$ m,

The number of vanadium atoms required to span the distance = $\frac{1.3*10^{-3} }{260*10^{-12} }$

= 5000000

Therefore, the number of vanadium atom that would span a distance of 1.30 mm is 5 million.

3 0

3 years ago

which of the following represents a compound? a. cl2 b. n2 c. co2 d. h2 user: which of the following represents an element? a.co

babunello [35]

C. CO2 is the compound (carbon dioxide) while N2 is the element (nitrogen)

6 0

3 years ago

Which of these is an ionic compound? NO2 LiCl SO3 CO

Pavlova-9 [17]

It is "LICI" I believe. I could be wrong please let me know if I am wrong.

4 0

3 years ago

Read 2 more answers