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suter [353]
2 years ago
5

During an experiment a thermometer was placed in a beaker containing hydrogen peroxide. The following observations were recorded

when yeast granules were added to hydrogen peroxide. Observation 1: Fizzing and bubbling took place. Observation 2: The temperature began to rise. Based on the observation, justify the type of change (physical or chemical) that took place.
Chemistry
2 answers:
patriot [66]2 years ago
4 0

Answer:

Chemical

Explanation:

The form is changing, you cannot get those bubbles back.

Rudiy272 years ago
3 0

Answer:

Chemical

Explanation:

The change was chemical, because it can no longer be returned to the original form. You cannot get back the bubbles or fizz from the air.

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one side of a cube measures 0.53 cm. the mass of the cube is 0.92 g. what is the density of the cube
ziro4ka [17]

Answer:

6.17 g/cm³

Explanation:

Data given:

one side of cube = 0.53 cm

mass of the cube is 0.92 g

density of the cube = ?

Solution:

First we will calculate for volume the cube

As we know all the sides or edges of a cube are equal so volume equation will be

So,

    V = length x width x height

    V = e³

as on side = 0.53 cm

then

     V = (0.53 cm)³

     V = 0.149 cm³

Now we will calculate density of cube

To calculate density, formula will be used

             d = m/v . . . . . (1)

where

d = density

m = mass

v = volume

put values in above formula 1

                   d = 0.92 g / 0.149 cm³

                   d = 6.17 g/cm³

so. the density of cube = 6.17 g/cm³

7 0
3 years ago
What does a<br> map<br> scale measure?
d1i1m1o1n [39]

Answer:

Map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground.

Explanation:

For example, on a 1:100000 scale map, 1cm on the map equals 1km on the ground.

7 0
2 years ago
What type of salt will affect temperature most?
vodka [1.7K]

Answer:

Sodium chloride

Explanation:

7 0
3 years ago
The chemical formula for artificial c7h5NO3s. Match the elements with the numbers found in one molecule of artificial sweeteners
mrs_skeptik [129]
If one were to match the ratio of atoms of the elements found in this molecular formula of artificial sweetener it would be :

Carbon - 7 atoms
Hydrogen - 5 atoms
Nitrogen - 1 atom
Oxygen - 3 atoms.
3 0
3 years ago
Read 2 more answers
Calculate the pH of a solution with a [H 3 O + ]=5.6x10 -9 M.
Gre4nikov [31]

Answer:

8.3

Explanation:

pH is the measure of the H+ or H30 (they r the same thing) ions in a solution. it is equal to -log[H+]. [H+]=  Molar concentration of H+ ions.

6 0
3 years ago
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