Which description below correctly describes the hydrogen bonding between water molecules?

Chemistry

1 answer:

MariettaO [177]3 years ago

5 0

Answer:

c.the slightly positive oxygen on one water molecules is attracted to a slightly negative hydrogen on another molecule of water

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When might a large volume of material have little mass

Natali5045456 [20]

A large volume of material will have a small amount of mass when the material in question is gaseous or porous, and therefore has a lot of space within it despite taking up a large amount of space overall.

4 0

3 years ago

For the following experiments, identify the independent variable and the dependent variable:

faust18 [17]

Answer:

A) IV: number of hours DV: score

Explanation:

Coz,

IV- is the variable that u change

DV- is the variable that u test or measure

In this case, we need to change the hours of studying to see how studying for different hours [1 hr, 2hr, etc (( Independant variable coz we're changing the no. of hours)) ] is going to affect the student's score, and in the end, we are measuring the score of each student [this is the dependant variable].

3 0

3 years ago

Metallic bonding occurs between atoms of<br> 1.)sulfur<br> 2.)copper<br> 3.)fluorine<br> 4.)carbon

adelina 88 [10]

Answer:

copper

Explanation:

metallic bonds occur among the metal atoms where iconic bonds join metal and nonmetals metallic bonding joins a bolt of metal atoms a sheet of aluminum foil and a copper wire are both place where you can see metallic bonding in action the Sea of electrons that is free to flow about the crystal of positive metal ions

3 0

2 years ago

Draw and label the structure of a sodium atom showing the distribution of electrons

Korolek [52]

Answer:

Please, find the drawing in the picture attached.

Explanation:

A simple model or drawing of the structure of an atom may be performed showing the electrons on the different energy levels (shells), plus the nucleons (protons and neutrons).

Then, you need the information on:

number of protons (atomic number)
electron configuration
number of neutrons

The first step is to find the atomic number of the atom. You find that information in the periodic table, where the elements are show with their chemical symbol.

The chemical symbol of sodium is Na. It is located in the group (colum) 1 and period (raw) 3. There you find that the atomic number is 11. Hence your drawing must show 11 protons.

Since the atom is neutral, the number of electrons is also 11. So, you must place the electrons in the following energy levels or shells:

Main energy level shell number of electrons

n = 1 K 2 (this is the maximum in this level)

n= 2 L 8 (this is the maximun in this level)

n= 3 M 1 (the maximum in this level is 18)

Now that you have the number of protons and the location of the electrons, you must determine the number of neutrons.

In the periodict table you will also find the atomic mass of the elements. The atomic mass of sodium is 22.990 amu. That means that most sodium atoms have mass number (number of protons plus neutrons) 23. Some isotopes will have less neutrons, but you can draw your model using the most typical isotope with 23 nucleons. This means, that the number of neutrons is 23 nucleons - 11 protons = 12 neutrons.