1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mkey [24]
3 years ago
10

It's Peggy Sue's birthday and she's about to blow out the candles on her cake. Brother Roger stops the party when he shouts: "Lo

ok at that! Chemical and physical changes taking places on your birthday cake!"
How would you respond to Roger?
A) Roger is incorrect. The melting wax is a physical change but there is no chemical change taking place.
B) Roger is correct. Lighting the match is a chemical change and burning the candles is a physical change.
C) Roger is correct. The melting wax is a physical change and the burning candle wick is a chemical change.
D) Roger is incorrect. Only a chemical change is taking place as evidenced by the light and heat of the burning candles.
Chemistry
2 answers:
Mandarinka [93]3 years ago
6 0

The correct answer is C). I really hope this helps yall. Plz mark me as Brainliest. :D

Charra [1.4K]3 years ago
3 0
This example is an controversial matter because melting an candle is considered as both physical change and chemical change because no new substances were made by melting an candle. The final answer is C.
You might be interested in
Changes to the global climate could include _______.
frosja888 [35]

1. Answer is d. all of the above.

Climate can be defined as the data collection of weather conditions of a long period of time in a certain area. The weather conditions that affect to the climate are temperature, precipitation, atmospheric pressure, wind and so on. Any changes in weather can change the global climate.

2. Answer is c. ozone.

Trees release oxygen and water vapor into the atmosphere but not ozone. The oxygen gas is released by trees as the by-product of photosynthesis. This is the natural way of production of oxygen gas. Water vapor can be released due to the transpiration of trees.

6 0
3 years ago
Read 2 more answers
__ CaSO4 + ____AIP --> ____Ca3P2 + ____AI2(SO4)3
4vir4ik [10]

Answer:

4.89 mol

Explanation:

Step 1: Write the balanced equation

This is a double displacement reaction.

3 CaSO₄ + 2 AIP ⇒ Ca₃P₂ + AI₂(SO₄)₃

Step 2: Establish the appropriate molar ratio

According to the balanced equation, the molar ratio of CaSO₄ to AlP is 3:2.

Step 3: Calculate the moles of AlP needed to react with 7.33 moles of CaSO₄

We will use the previously established molar ratio.

7.33 mol CaSO₄ × 2 mol AlP/3 mol CaSO₄ = 4.89 mol AlP

3 0
3 years ago
Please I need help with Chemistry ! Questions in attachment, I'LL GIVE THE BRAINLEST AND POINTS ! I need it soon !!
ludmilkaskok [199]

Answer:

1)

A) Bromine

B) Lithium

C) Calcium

D) Sodium

E) Actinium

2)

Carbon: 60

Magnesium 24 times

bromine is 14 times

3)

24 times

8/3 times

4)

Hydrogen

Helium

5)

Explanation:

7 0
2 years ago
14.Sorbitol is used in sugar free gums as a sweetener. After analysis, a sample of
evablogger [386]
<h3>Answer:</h3>

C6H12O6

Explanation:

To find empirical formular you write out the element

Carbon Hydrogen Oxygen

3.96 769 5.28

then u althrough divide by their atomic numbers

3.96÷ 12 769÷1 5.28÷16

=0.33 =769 =0.33

also divide althrough by the lowest number

the lowest number is 0.33 so we use it to divide

0.33÷0.33. 769÷0.33. 0.33÷0.33

= 1 = 2 = 1

empirical formular= CH2O

To find the Molecular formular

Molecular number = molar mass

(CH2O)n = 182

(12+1×2+16)n = 182

30n = 182

n = 6

therefore the Molecular formular is C6H12O6

3 0
2 years ago
What is the concentration of a solution with 2.00 moles of solute in 4.00 l of solution?
jarptica [38.1K]

Explanation:

Molarity is defined as the the number of moles present in a solution divided by volume in liters.

Mathematically,    Molarity = \frac{/text{no. of moles}}{volume in liter}

As it is given that number of moles present into the solution are 2.00 moles and volume is 4 liter. Therefore, calculate the molarity of solution as follows.

                Molarity = \frac{/text{no. of moles}}{volume in liter}

                          = \frac{2.00 moles}{4.00 L}

                          = 0.5 M

Thus, we can conclude that the concentration of given solution is 0.5 M.

6 0
3 years ago
Other questions:
  • Why are most organic compounds nonconducting and insoluble in water?
    10·2 answers
  • What are the units of molar mass?<br> O A. Lig<br> O B. g/mol<br> O c. g/L<br> O D. mol/g
    14·2 answers
  • Does pressure decrease when a gas is removed
    12·1 answer
  • a sample of gold is heated from 12 degrees to 28 degrees celsius and absorbs 460 joules of energy. What is the mass of gold?
    11·1 answer
  • The matter in this series of images is going through a change. Draw a conclusion about the type of change shown. Is it a physica
    8·1 answer
  • What would be the effect of each of the following sources of error on the molarity of H2SO4 determined in this experiment? State
    6·1 answer
  • What are the half-reactions for a galvanic cell with aluminum and gold electrodes?
    14·1 answer
  • Is Elisa getting the right amount of sleep??
    5·1 answer
  • Study the animal and plant cell above. Select the features that you find in BOTH types of cells
    5·1 answer
  • 3. Mothballs in a clothes closet gradually disappear over time. What happens to this<br> material?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!