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
hodyreva [135]
3 years ago
6

The total number of each element is not changed during a chemical reaction

Chemistry
1 answer:
Paha777 [63]3 years ago
3 0

false all element when they are combined eachother thier valance number will change

the combination of oxygen and aluminum gives us Al2O3 see even the numbers are changing thank you if you have a comment you can write

You might be interested in
What the branch of a zoologist
MrRa [10]

The branch of biology that deals with animals and animal life, including the study of the structure, physiology, development, and classification of animals.  The animal life of a particular area or period: the zoology of Alaska; the zoology of the Pleistocene.

6 0
3 years ago
Read 2 more answers
Number 39! Please explain step by step!!!
ahrayia [7]

Answer:

The answer to your question is The honda civic hybrid weights 13181.8 N or 1318.2 kg

Explanation:

Data

Weight = 2900 lb

Weight = ? N

mass = ? kg

1 kg ------- 10 N

0.22lb ---- 1N

Use proportions to solve this problem

                        0.22 lb ------------------- 1 N

                        2900 lb -----------------  x

                         x = (2900 x 1) / 0.22

                         x = 2900 / 0.22

                        x = 13181.8 N

                          1 kg ----------------------- 10 N

                           x     ----------------------- 13181.8 N

                           x = (13181.8 x 1)/10

                           x = 1318.2 kg

                       

7 0
3 years ago
when you draw a bow across a violin string which kind of wave is created in the air surrounding the string
Lilit [14]

Answer:

When the string on a violin vibrates, waves move in both directions along the string, interfering with each other. These waves are standing waves.

Explanation:

What are Standing Waves?

The Standing Waves are waves generated due to the vibrational frequency that produces reflected waves capable of interfering with the incident waves. 

8 0
1 year ago
Why does perchloric acid cause macromolecules to precipitate?
asambeis [7]
Perchloric acid (HCO₄) is one of strongest inorganic acids. Perchloric acid  precipitation is used to removes most of the protein present in the sample and stabilize many of the small molecule analytes. It can use also to precipitation glycogen, ATP, glutathione, antioxidants.
Perchloric acid donates protons to macromolecules and lower their solubility in water. Also perchloric acid is strong oxidizing agent and change oxidation number of elements.
7 0
2 years ago
How many moles of HCl are present in 4.7 L of a 4.23 M HCl solution?
REY [17]

Hey There!

Volume = 4.7 L

Molarity = 4.23 M

Therefore:

n = M *V

n = 4.23 * 4.7

n = 19.881 moles of HCl

hope this helps!

6 0
3 years ago
Other questions:
  • Star A has a magnitude of 2. Star B has a magnitude of 5. What is the brightness ratio? A.6.3 : 1 B.15.8 : 1 C.5 : 2 D.2 : 5
    9·1 answer
  • Which descriptions apply to emitted radiation? Check all that apply. measurement in Ci/Bq measurement in conventional rad or the
    10·2 answers
  • What is the free energy change in kJ/mol for the process below at 43.9 °C when the concentration of A =0.88 M, B = 0.49 M and C
    13·1 answer
  • Draw the Lewis Structure for H2O.
    15·1 answer
  • Which of the following is a heterogeneous mixture
    8·1 answer
  • The ______,
    5·1 answer
  • Please help ill give brainly !
    11·2 answers
  • A car with a mass of 3,500lbs accelerates negatively from 35m/s to 8m/s in 8s. What is the
    14·1 answer
  • Explain why the sign of the slope of a regression line must be thesame as the sign of the correlation coeffi cient.
    5·2 answers
  • 17. Physical properties of a material include all but ________________.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!