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
s2008m [1.1K]
3 years ago
12

If you were making S’mores [using a chocolate bar, gram-crackers, and marshmallows] at a campfire, would this process be conside

red a chemical reaction?
Chemistry
1 answer:
OLga [1]3 years ago
3 0

Answer:

The process of making S'more by adding chocolate bar, gram-crackers, and marshmallows in layers is not a chemical reaction

Explanation:

In a chemical reaction, the substances involved in the reaction are known as the reactants and the substances produced have different physical and chemical properties than those of the reactants and they are known as the products.

The bonds that hold the atoms of the reactants are broken down and rearranged, creating entirely new substances as products. Therefore, energy must be added and/or evolved in any chemical reaction and all reactant atoms should be involved in the reaction.

The change in energy can be sensed as heat change such as increase or decrease in the temperature of the products

Since S'more does not involve any of the above changes that occur in a chemical reaction when the chocolate bar, gram-crackers, and marshmallows are put together, it is not a chemical change or a chemical reaction.

You might be interested in
Five students performed a Kjeldahl nitrogen analysis of a protein sample. The following weight % nitrogen values were determined
Sunny_sXe [5.5K]

Answer:

G_calculated = 1.756

The outlier should be rejected, as G_cal > G_tab (= 1.463) at 95 % confidence.

Explanation:

The Grubb's test is used for identifying an outlier in data, which is from the same population. For this, a statistical term, G, is calculated for the suspected outlier. If the calculated value is greater than the tabulated G value then the suspected value is rejected. This term is given as,

G_calculated = | suspect value - mean| / s

Here,  suspect value is 13.8, mean is to be taken of all the data (including suspected value). s is the standard deviation of the sample data.

s is calculated from the following formula:

s = (Σ(xi - x)²/(N-1))^1/2

Here, x is the mean, which is 15.24, xi is individual value and N is the total number of data (5).

From the above formula, s is found to be

Standard Deviation, s = 0.820

Now for G value,

G_calculated = | 13.8 - 15.24| / (0.820)

G_ calculated = 1.756

The tabulated G value at 95 % confidence and N -1 (5 - 1 = 4) degree of freedom is, 1.463.

As calculated G (1.756) is greater than the tabulated G (1.463), the value 13.8 is considered an outlier at 95 % confidence.  

3 0
3 years ago
Hurry up as fast as possible Ill mark you brainlist
Vika [28.1K]

It took 380,000 years for electrons to be trapped in orbits around nuclei, forming the first atoms.

These were mainly helium and hydrogen, which are still by far the most abundant elements in the universe. Present observations suggest that the first stars formed from clouds of gas around 150–200 million years after the Big Bang. Heavier atoms such as carbon, oxygen and iron, have since been continuously produced in the hearts of stars and catapulted throughout the universe in spectacular stellar explosions called supernovae.

6 0
3 years ago
Forests are the only carbon sinks on Earth. Please select the best answer from the choices provided T F
dmitriy555 [2]
False, as oceans can act as carbon sinks along with forests. 
4 0
3 years ago
Read 2 more answers
Explain how nature of cathode rays does not depend on nature gas?​
Ilia_Sergeevich [38]

Answer:

The characteristics of cathode rays do not depend upon the material of electrodes and the nature of the gas present in the cathode ray tube.

4 0
2 years ago
Help me with this question I’m kind of struggling
larisa86 [58]

All i know that we are HOOman

3 0
3 years ago
Read 2 more answers
Other questions:
  • Write a balanced equation for each of these chemical reactions potassium phosphate + calcium nitrate
    8·1 answer
  • The following ionization energies were found for an unknown element: -
    10·1 answer
  • What are the basic steps of the scientific method??
    10·1 answer
  • What is the mass of 6.02 × 10²³ hydrogen atoms​
    6·1 answer
  • Is carbon or chlorine more reactive? Why?
    5·1 answer
  • Heat flows fromsubstances
    13·2 answers
  • A 12.0 wt% solution of CaCl2 (110.98 g/mol) has a density of 1.107 g/mL.
    15·1 answer
  • You are working a crime scene and discover a weapon. How do you pick up the weapon so you do not disturb
    12·2 answers
  • Describe the properties of oobleck when it behaves like a solid and a liquid.
    14·1 answer
  • Why is xenon monatomic but bromine is diatomic
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!