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polet [3.4K]
3 years ago
9

A change in color, such as rusting of metal, is a sign that

Chemistry
1 answer:
loris [4]3 years ago
5 0

Iron undergoes a chemical reaction called oxidation to form rust, or iron oxide. ... Copper forms a turquoise colored oxide and silver forms a black oxide. In both cases you know that a chemical reaction has taken place because of the color change.

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Determine the pH of a 0.188 M NH 3 solution at 25°C. The K b of NH 3 is 1.76 × 10 -5.
Archy [21]

Answer:

pH is 8.52

Explanation:

According to the working in the photo

5 0
3 years ago
Which of these solutes raises the boiling point of water the most?
Murljashka [212]

Answer:

D. ionic sodium phosphate (Na3PO4)

Explanation:

8 0
3 years ago
List the metals that form only one type of ionn (that is, metals whose charge is invariant from one compound to another).
Serjik [45]

List of the metals that form only one type of ion (that is, metals whose charge is invariant from one compound to another) is below,

Here , we have to list the metals that form only one type of ion (that is, metals whose charge is invariant from one compound to another) and have to identify the group numbers of these metals.

  • Hydrogen        H+
  • Lithium             Li+
  • Sodium            Na+
  • Potassium        K+
  • Rubidium         Rb+
  • Cesium            Cs+
  • Beryllium         Be2+
  • Magnesium  Mg2+
  • Calcium          Ca2+
  • Strontium  Sr2+
  • Barium          Ba2+
  • Aluminum  Al3+
  • Zinc                  Zn2+
  • Scandium  Sc3+
  • Silver          Ag+

Co is stable in both +2 and +3 oxidation state. So it can variable. Li only have +1 charge. So it is invariable from one compound to other.

To learn more about metals, here

brainly.com/question/18153051

#SPJ4

4 0
1 year ago
The picture shows a balloon containing air.
hram777 [196]

Answer:

The air particles are sped up and they are more spaced apart.

Explanation:

This is because when things are heated up the particles speed up and flow more freely causing them to be space apart.

5 0
3 years ago
Which composer made it a goal to create compositions that sounded truly american?.
MAVERICK [17]

Given what we know, we can confirm that the composer who made it a goal to create compositions that sounded truly American was Aaron Copland.

<h3>Who was Aaron Copland?</h3>

Aaron Copland was an American composer, among his other disciplines, best known for his jazz-styled music. He went on to win an Oscar award for film composing for the movie The Heiress (1949).

Therefore, we can confirm that the composer who made it a goal to create compositions that sounded truly American was Aaron Copland.

To learn more about music visit:

brainly.com/question/8051042?referrer=searchResults

7 0
3 years ago
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