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BartSMP [9]
3 years ago
12

How many protons are found in an atom of platinum (pt)?

Chemistry
1 answer:
Natasha_Volkova [10]3 years ago
5 0
78 protons are found in platinum(pt).
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How can professionals increase their levels of stress as a result of personal work habits?
zmey [24]

Answer:

A

Explanation:

Developing work ethics won't lower your stress although it may make your conscience a little happier. Not B

Not C. Procrastinating just makes things harder. The mountain of things to do is not diminishing at all and your stress knows it.

Not D. Although D is the second best answer, setting goals is not really an action. It is a plan for how to work. But it is not work. Still having a goal is useful.

The answer is A. Just keep hitting what you have to do at a steady pace.

8 0
2 years ago
Describe the difference between a ball-and-stick model and a space-filling model of a compound.
Lisa [10]
A space-filling model shows the relative amount of space each atom takes up. In other words, a space-filling model can show relative sizes of atoms. However, unlike ball-and-stick or structural models, space-filling models do not show bond lengths clearly. Bonds are not really like sticks in a ball-and-stick model.
4 0
3 years ago
Predict which substance in each pair has the higher surface tension.
natta225 [31]

Answer:

(a) Between methanol (CH₃OH) and glycerol (C₃H₅(OH)₃), the substance with the higher surface tension is glycerol (C₃H₅(OH)₃)

(b) Between tetrabromomethane (CBr₄) and chloroform (CHCl₃), the substance with the higher surface tension is chloroform (CHCl₃)

Explanation:

The surface tension of these substances at 20 °C given in mN/m, is as follows:

The surface tension of Methanol is 22.70

The surface tension of Tetrabromomethane is 26.95

The surface tension of Glycerol is 64.00

The surface tension of Chloroform is 27.50

(a) Between methanol (CH₃OH) and glycerol (C₃H₅(OH)₃), the substance with the higher surface tension is glycerol (C₃H₅(OH)₃)

(b) Between tetrabromomethane (CBr₄) and chloroform (CHCl₃), the substance with the higher surface tension is chloroform (CHCl₃)

8 0
3 years ago
Which phrase best describes an exothermic chemical reaction? a does not absorb any energy b forms products with higher bond ener
-Dominant- [34]
<span>The correct answer is d. The reaction releases more energy than it absorbs. An example of an exothermic reaction is fire. Connecting the carbon atoms in wood with the oxygen in the air causes flames and gives of heat and light.</span>
8 0
3 years ago
1. Calculate the mass (g), of 4.5 atoms of oxygen.<br> I
konstantin123 [22]

Answer

thus, 4 moles of oxygen gas (O2) would have a mass of 128 g.

3 0
3 years ago
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