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
anygoal [31]
3 years ago
11

What is the most important thing you need to remember for physical change?

Chemistry
1 answer:
Verizon [17]3 years ago
5 0
The most important thing you need to know about physical change, is that a physical change does not change the identity, or chemical make up of an object or substance. For example, if you were to have an orange, and you painted it blue, it is still an orange, whereas if you burned the orange, it is no longer an orange. It would be soot/ash. 
You might be interested in
Which surface ocean current has the warmest water.
SOVA2 [1]
Which surface ocean current has the warmest water.
 The answer would be B
5 0
4 years ago
Read 2 more answers
Petrochemicals are used in some cosmetics. True or False
Hunter-Best [27]
True. Any cosmetic containing paraffin wax, benzene, mineral oil, PEG, DEA, MEA, the suffix ethyl- or propyl-, etc. About 95% of fragrances contain petrochemicals.
4 0
3 years ago
Valence electrons are the ONLY electrons that are involved in bonding.
ELEN [110]

Yes that is definitely true

7 0
4 years ago
Given: N2 + 3Cl2 → 2NCl3, ΔH = 464 kJ/mol Use the given bond energies and the periodic table to calculate the energy change in t
guapka [62]

The given chemical reaction is:

N_{2}+3Cl_{2}-->2NCl_{3}

ΔH^{0}_{reaction}=∑BE(reactants)-∑BE(products)

                 = {(941 kJ/mol) + (3 * 242 kJ/mol)} -[{2*(3*200 kJ/mol)}]

                     = 467 kJ/mol

Calculating the change in heat when 85.3 g chlorine reacts in the above reaction:

Moles of chlorine = 85.3 g Cl_{2}* \frac{1 mol Cl_{2}} {70.91 g Cl_{2}  }

                             = 1.20 mol Cl_{2}

Heat change when 1.20 mol chlorine reacts

                             = 1.20 mol * \frac{467kJ}{mol} =560.4 kJ

6 0
3 years ago
Some volatile organic compounds can be detected by hydrogeologists in the field or labs because of the ______ emitted from the g
Vadim26 [7]

Volatile organic compounds can be detected by hydrogeologists in the field or labs because of the odor of the vapors emitted from the groundwater and/or soil samples.

<h3>What are volatile substances?</h3>

Volatile substances are substances which can easily vaporize or change to gaseous state.

Volatile substances can either be solids or liquids but are mostly liquids.

Example of volatile substances include ether, petrol, chocolate.

The presence of volatile substances can be detected by the gases they release which may have characteristic odors.

Therefore, volatile organic compounds can be detected by hydrogeologists in the field or labs because of the odor of the vapors emitted from the groundwater and/or soil samples.

Learn more about volatile compounds at: brainly.com/question/25403770

7 0
2 years ago
Other questions:
  • What is the percentage concentration by mass of a solution that contains 0.098 kg of H2SO4 in 500.0 g of H2O?
    14·2 answers
  • How does the specific heat of water compare to the specific heat of concrete?
    5·1 answer
  • Why does water move into the ground to create groundwater? A. evaporation B. wind C. gravity D. friction
    11·1 answer
  • : Starting with 0.3500 mol CO(g) and 0.05500 mol COCl2(g) in a 3.050-L flask at 668 K, how many moles of Cl2(g) will be present
    14·1 answer
  • How does the equilibrium change with the removal of hydrogen (H2) gas from this equation? 2H2S ⇌ 2H2(g) + S2(g)
    10·2 answers
  • What is a common hazard of commercial fishing
    9·2 answers
  • Determine the mass of 2.94 x 10^34 molecules of decane
    7·1 answer
  • When layered into a single column, which water will sink to the bottom?
    10·1 answer
  • When the foil is negatively charged will all of the foil still be made up of aluminum atoms
    8·1 answer
  • What is the of 0.068 M of OH^ - ion?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!