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
Ulleksa [173]
3 years ago
7

When a chemical change occurs _____.

Chemistry
1 answer:
sergij07 [2.7K]3 years ago
7 0

Answer:

d

Explanation:

i think its d but im not sure.

You might be interested in
A ____usually requires calculations that are too complicated to do by<br>hand. ​
liraira [26]

Answer:

computer model

Explanation:

Computer models are cheaper to set up than alternative methods that could be used to predict what will happen in a system, ex. building a prototype. Other benefits include being able to: make alterations and quickly see the outcomes.

8 0
3 years ago
In a coffee-cup calorimeter, 100.0 g of H2O and 100.0 mL of 1M HCl are mixed. The HCl had an initial temperature of 44.6 C and t
Hatshy [7]

Answer:

Exothermic reaction for the HCl, endothermic reaction for the water

2803.28\ \text{J}

Explanation:

Heat was lost by HCl as its temperature lowered, so it was an exothermic reaction for the HCL.

Heat was gained by water as its temperature increased, so it was an endothermic reaction for the water.

m = Mass of water = 100 g

c = Specific heat of water = 4184\ \text{J/kg}^{\circ}\text{C}

\Delta T = Change in temperature of water = (31.3-24.6)^{\circ}\text{C}

Heat is given by

Q=mc\Delta T\\ =0.1\times 4184\times (31.3-24.6)\\ =2803.28\ \text{J}

Heat gained by water is 2803.28\ \text{J}.

5 0
2 years ago
In ionic compounds, ________ lose their valence electrons to form positively charged ________. nonmetals, anions metals, polyato
Keith_Richards [23]
Answer:
            <span>In ionic compounds, <u>Metals</u> lose their valence electrons to form positively charged Cations. 

Explanation:
                   Metals have the ability to loose elctrons readily. For example metals of Group IA and Group IIA readily looses electrons in order to obtain Noble Gas Configuration. On the other hand Non-metals tends to gain electrons and acquire negative charge. While Ions are made when an an element gain or loose electrons. After loosing electrons element get positive charge which is called as Cation while on gaining electron it gets negative charge called as Anion.</span>
6 0
3 years ago
Read 2 more answers
What compound name is As5O2
levacccp [35]

Answer:

Arsenic pentoxide

Explanation:

3 0
2 years ago
HELP! WILL MARK BRAINLIEST! ASAP!!
lilavasa [31]

Answer:

Mn is a Paramagnetic

Explanation:

8 0
3 years ago
Other questions:
  • Epinephrine (adrenaline) is 59.0% carbon, 7.1% hydrogen, 26.2% oxygen, and 7.7% nitrogen by mass. What is the empirical formula
    6·2 answers
  • What is the best example of electromagnetic energy in everyday life
    10·2 answers
  • Consider a hypothetical reaction in which a and b are reactants and c and d are products. if 25 grams of a completely reacts wit
    7·1 answer
  • Which of the following statements about the formation of a solution is true?
    5·1 answer
  • What is the order of a food chain
    6·2 answers
  • A substance is tested in a lab. It is found to maintain a unique shape and is a good conductor of electricity. If it is made up
    5·2 answers
  • How does understanding the structure of the atom help you see both unity and diversity in forms of matter?
    6·1 answer
  • take a bucket and fill it with water put a lot of different thing in it make separate list of the articles which sinks in the wa
    7·1 answer
  • Both the esophagus and the small intestine are involved in the digestion of food. The esophagus squeezes food into the stomach b
    14·1 answer
  • Use a reference source to identify five facts about a neutron star or a black hole. Don’t forget to cite your sources.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!