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
bearhunter [10]
2 years ago
5

How does lemon juice stop an apple from turning brown?

Chemistry
1 answer:
sergejj [24]2 years ago
3 0
Lemon juice prevents browning because it is full of ascorbic acid (Vitamin C) and it has a low pH level. The oxygen will react with the ascorbic acid before it reacts with polyphenol oxidase (the enzyme in the fruit).
You might be interested in
Ứng dụng điều chế của lưu huỳnh thành oxit axit ?
Juli2301 [7.4K]

that's your work bro do by your own

6 0
3 years ago
Fluorine gas reacts with zinc (II) chloride →
dezoksy [38]

Answer:

Zinc Chloride + Difluorine -----> Zinc Fluoride + Dichlorine

Explanation:

ZnCl2 + F2 → ZnF2 + Cl2

5 0
3 years ago
N2 + 3 H2 → 2 NH3
sweet [91]

Answer:

B

Explanation:

5 0
2 years ago
Which statement is FALSE? a. ΔHrxn is the heat of reaction. b. ΔErxn is a measure of heat. c. An exothermic reaction gives heat
Pavlova-9 [17]

Answer:

b. ΔE rxn is a measure of heat

Explanation:

a. ΔHrxn is the heat of reaction. <em>TRUE. </em>ΔHrxn or change in enthalpy of reaction is per definition the change in heat that is involved in a chemical reaction.

b. ΔErxn is a measure of heat. <em>FALSE. </em>Is the change in internal energy of a reaction

c. An exothermic reaction gives heat off heat to the surroundings. <em>TRUE</em>. An exothermic reaction is a chemical reaction that releases heat.

d. Endothermic has a positive ΔH. <em>TRUE. </em>When a process is exothermic ΔH<0 and when the process is endothermic ΔH>0

e. Enthalpy is the sum of a system's internal energy and the product of pressure and volume. <em>TRUE. </em>Under constant pressure and volume the formula is ΔH = ΔE + PV

I hope it helps!

3 0
3 years ago
Calcium carbide, CaC2, is manufactured by reducing lime with carbon at high temperature. (The carbide is used in turn to make ac
sweet-ann [11.9K]

The energy of the carbide released is 7262.5MJ.

<h3>What is the energy?</h3>

We know that the reaction between calcium  oxide and carbon occurs in accordance with the reaction; CaO(s)+3C(s)----- > CaC_{2} (s)+CO(g). The reaction is seen to produce 464.8kJ of energy per mole of carbide produced.

Number of moles of CaC_{2} produced = 1000 * 10^3 g/64 g/mol

= 15625 moles of calcium carbide

If 1 mole of CaC_{2} transfers  464.8 * 10^3 J

15625 moles of calcium carbide transfers 15625 moles  * 464.8 * 10^3 J/ 1 mol

= 7262.5MJ

Learn more about reaction enthalpy:brainly.com/question/1657608

#SPJ1

7 0
1 year ago
Other questions:
  • Which food is not a heterogeneous mixture?
    9·2 answers
  • What is the oxidation number for iodine in Mg(IO3)2 ?
    13·2 answers
  • List the following types of electromagnetic radiation in order of increasing wavelength.
    9·1 answer
  • An object has a velocity of 8m/s and a kinetic energy of 480 j what is the mass of the object
    6·1 answer
  • Hydrazine, N2H4, is a weak base and is used as fuel in the space shuttle.
    11·1 answer
  • What is the hydrogen ion concentration of 0.450M solution of acetic acid (HC2H3O2), if the ionization constant(Ka) is 2.19 x 10-
    7·1 answer
  • PLEASE HELP!!!
    11·1 answer
  • Match the element to its oxidation number.<br> Sulfur
    10·2 answers
  • ???????????????????????????????????????
    8·1 answer
  • The element that has a valence configuration of 5s2 is<br> Ba<br> Ca<br> Be<br> Sr<br> Mg
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!