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
amid [387]
3 years ago
10

Which type of change creates a new substance, physical or chemical?

Chemistry
2 answers:
Fynjy0 [20]3 years ago
7 0
A chemical change creates a new substance. A physical change doesn't alter a substance while a chemical change does.

Hope this helps!
elena-14-01-66 [18.8K]3 years ago
4 0
A chemical change does
You might be interested in
A 52.0-mL volume of 0.35 M CH3COOH (Ka=1.8×10−5) is titrated with 0.40 M NaOH. Calculate the pH after the addition of 23.0 mL of
Georgia [21]

NaOH reacts with CH3COOH in 1:1 molar ratio to produce CH3COONa 

NaOH + CH3COOH → CH3COONa + H2O 

Mol CH3COOH in 52.0mL of 0.35M solution = 52.0/1000*0.35 = 0.0182 mol CH3COOH 

Mol NaOH in 19.0mL of 0.40M solution = 19.0/1000*0.40 = 0.0076 mol NaOH 

These will react to produce 0.0076 mol CH3COONa and there will be 0.0182 - 0.0076 = 0.0106 mol CH3COOH remaining in solution unreacted . Total volume of solution = 52.0+19.0 = 71mL or 0.071L 

Molarity of CH3COOH = 0.0106/0.071 = 0.1493M 

CH3COONa = 0.0076 / 0.071 = 0.1070M 

pKa acetic acid = - log Ka = -log 1.8*10^-5 = 4.74. 

pH using Henderson - Hasselbalch equation: 

pH = pKa + log ([salt]/[acid]) 

pH = 4.74 + log ( 0.1070/0.1493) 

pH = 4.74 + log 0.717 

pH = 4.74 + (-0.14) 

pH = 4.60.

7 0
3 years ago
Help please i’ll give extra points
joja [24]

Answer:

okay no problem

I will give

7 0
3 years ago
What is solar radiation?
mafiozo [28]

Explanation:

Solar energy is the radiant energy emmitted from the Sun. It is the electromagnetic energy

8 0
3 years ago
What is the mass of aluminum oxide (101.96 g/mol) produced from 1.74 g of manganese(iv) oxide (86.94 g/mol)?
NemiM [27]

the mass of aluminum oxide (101.96 g/mol) produced from 1.74 g of manganese(iv) oxide (86.94 g/mol) is 1.36g

The reaction is 3 MnO2 + 4 Al ------ 2Al2o3+ Mn

3 mole of manganese oxide give 2 moles of aluminum oxide so by the reaction n( MnO2)/3 =n(al203)2

the formula is n= mass/M so, now substituting values

m (Al2O3)= m(MnO2) X 2 X M (Al2O3) / M(MnO2 X3

so, by substituting values, 2 X101.96 X1.74g / 3 X 86.94 =1.36g

so mass of aluminum oxide obtained = 1.36g

To learn more about Mass:

brainly.com/question/19694949

#SPJ4

3 0
2 years ago
Liquid helium boils at –268.93 °C. What is the boiling point of helium on the Kelvin temperature scale?
BARSIC [14]

In order to change celcius to kelvin always add 73 to it leaving you with -195.93

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which would cause a hazard when working with chemicals in laboratory?
    5·1 answer
  • Calculate the density of each object
    8·1 answer
  • PLEASE HELP! 15 POINTS!!!!!
    14·1 answer
  • Which of the following choices represents a balanced chemical equation? A. Ca3(PO4)2 + 6SiO2 → P4O10 + 3CaSiO3 B. 2Ca3(PO4)2 + 6
    10·1 answer
  • Students were given four unknown substances and asked to observe their
    11·1 answer
  • How does the chemistry of life relate to cellular respiration
    6·1 answer
  • If you start with 30.0 grams of sodium fluoride, how many grams of magnesium fluoride will be produced?
    15·1 answer
  • It is more logical to believe that the complex life sustaining processes of the sun-Earth system were created because they Choos
    13·1 answer
  • Which of the following correctly compares glass A and glass B?
    5·2 answers
  • (b)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!