All categories

2 years ago

whAt is an example of a chemical change is: Boiling water, Melting butter, Spreading cream cheese, Toasting bread?

Chemistry

2 answers:

I am Lyosha [343]2 years ago

6 0

Answer:

Toasting Bread

Explanation:

Toasting bread cannot be transformed

Delvig [45]2 years ago

4 0

Answer: Toasting Bread

Explanation:

You might be interested in

A 13.00 g sample of citric acid reacts with an excess of baking soda as shown in the equation. What is the theoretical yield of

julia-pushkina [17]

Chemical equation of the reaction between citric acid and baking soda:

$C_{6} H_{8} O_{7} +3NaHCO_{3} -\ \textgreater \ Na_{3} C_{6} H_{5} O_{7} +3 H_{2} O+3CO_{2}$

Ratios

Citric Acid Baking soda -> Sodium Citrate Water Carbon Dioxide
C6H8O7 CO2
1 mole 3moles

Molecular masses
Citric acid
6*12 + 8*1 + 7*16 = 192 g/mole
Carbon dioxide
12 + 2*16 = 44 g/mole

Proportion carbon dioxide / citric acid

3 * 44 g of carbon dioxide / 192 g of citric acid

132 g of carbon dioxide / 192 g of citric acid

13.00 g of citric acid * [132 g of carbon dioxide / 192 g of citric acid] = 8.94 g of carbon dioxide.

Answer: 8.94 grams.

3 0

3 years ago

Read 2 more answers

A teacher divides her class into four groups. She assigns

babunello [35]

Group C : 32.1°C , 31.9°C, 31.8°C makes the most precise measurements of the object's temperature.

Precision :The degree of similarity between study results of the experiment if they were performed today under comparable conditions.

If repeated measurements yield similar results, the measurement is considered precise (or repeated surveys).

It means how closely all the results are related .

Therefore, there should be less difference between the measurements of all the results.

In option (a) , there is a difference of 1° in all the results.

In option (b) , there is a difference of approximately 1.5° in all the results.

In option (c), there is only 0.2° difference in all the results.

In option (d) , there is a difference of 3° in all the results.

Therefore, All the option of group (c) are closely related.

Hence, Group (c) 32.1°C, 31.9°C, 31.8°C makes the most precise

measurements of the object's temperature.

Learn more about Precision & Accuracy here brainly.com/question/5792909

#SPJ1

7 0

1 year ago

What is the moisture content of hard gelatin capsule?

insens350 [35]

Answer:

The standard moisture content specification for hard gelatin capsules is between 13 % w/w and 16 % w/w.  This value can vary depending upon the conditions to which they are exposed: at low humidity's they will lose moisture and become brittle, and at high humidity's they will gain moisture and soften.

Explanation:

Hope this helps!

6 0

3 years ago

True or False? You can observe physical properties of matter without changing the identity of the substance

sdas [7]

True it is true a

true

8 0

2 years ago

Read 2 more answers

A 0.4647-g sample of a compound known to contain only carbon, hydrogen, and oxygen was burned in oxygen to yield 0.01962 mol of

Scilla [17]