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
hoa [83]
3 years ago
9

What happens during a chemical reaction?

Chemistry
2 answers:
Svetradugi [14.3K]3 years ago
5 0

Answer: Option (a) is the correct answer.

Explanation:

A chemical reaction is defined as the reaction in which exchange of electrons take place between reactant molecules due to which bonds between reactant molecules are broken down.

This leads to the formation of new compounds known as products which occur due to formation of bonds.

For example, HCl + NaOH \rightarrow NaCl + H_{2}O

Here, bonds between HCl and NaOH are broken down and formation of NaCl and H_{2}O occur due to new bond formation.

Thus, we can conclude that during a chemical reaction the 'reactants' bonds break, and bonds of the products form.

frozen [14]3 years ago
3 0

Answer: The reactants’ bonds break, and bonds of the products form.

Explanation:

When a chemical reaction takes place, the bonds are broken and new bonds are formed to make new molecules. Like when 2 water molecules are broken down to form hydrogen and oxygen.

You might be interested in
Which is a characteristic of mixtures?
pshichka [43]

Answer:

A major characteristic of mixtures is that the materials do not chemically combine

Explanation:

Mixtures can be divided into those that are evenly distributed (homogeneous) and those that aren't (heterogeneous)

8 0
3 years ago
Read 2 more answers
A. Gallium is produced by the electrolysis of a solution obtained by dissolving gallium oxide in concentrated NaOH(aq). Calculat
liraira [26]

Answer:

A)Mass of  gallium plated out is 0.3440 grams

B) For 0.67 hours current of 5.79 A must to be applied to plate out 8.70 g of tin.

Explanation:

To calculate the total charge, we use the equation:

C=I\times t

where,

C = Charge

I = Current in time t (seconds)

To calculate the moles of electrons, we use the equation:

\text{Moles of electrons}=\frac{C}{F}

where,

F = Faraday's constant = 96500

A) The equation for the deposition of Ga(s) from Ga(III) solution follows:

Ga^{3+}(aq.)+3e^-\rightarrow Ga(s)

I = 0.790 A, t = 30.0 min = 1800 seconds

C=I\times t

C=0.790 A\times 1800 s=1422 C

Moles of electron transferred:

=\frac{1422 C}{96500 F}=0.01474 mol

Now, to calculate the moles of gallium, we use the equation:

\text{Moles of Gallium}=\frac{\text{Moles of electrons}}{n}

n = number of electrons transferred = 3

\text{Moles of Gallium}=\frac{0.01474 mol}{3}=0.004913 mol

Mass of 0.004913 moles of gallium = 0.004913 mol × 70 g/mol=0.3440 g

B) The equation for the deposition of Sn(s) from Sn(II) solution follows:

Sn^{2+}(aq.)+2e^-\rightarrow Sn(s)

Moles of tin = \frac{8.70 g}{119 g/mol}=0.07311 mol

n = number of electrons transferred = 2

\text{Moles of tin}=\frac{\text{Moles of electrons}}{n}

Moles of electron =  n\times \text{Moles of tin}

=2\times 0.07311 mol=0.14622 mol

Charge transferred during time t :

\text{Moles of electrons}=\frac{C}{F}

C=96500 F\times 0.14622 mol=14,110.23 C

Current applied for t time = I = 5.79 A

t=\frac{C}{I}=\frac{14,110.23 C}{5.79 A}=2,437 s=0.67 hrs

For 0.67 hours current of 5.79 A must to be applied to plate out 8.70 g of tin.

5 0
4 years ago
The atomic number of an isotope of Bromine-80 is __________.
antoniya [11.8K]

Answer:

35

Explanation:

The number of protons in bromine-80 is 35, it is the same with the atomic number.

3 0
3 years ago
A solution that dissloves completely is called a?
snow_tiger [21]

soluble substances dissolves in solvents

3 0
3 years ago
Read 2 more answers
What is the mass of a piece of iron if its density is 1.98 g/mL and its volume is 2.45 mL?
viktelen [127]

Answer:

4.858 g

Explanation:

Start with the formula

density = \frac{mass}{volume}

density = 1.98 g/mL

volume = 2.45 mL

mass = ??

rearrange the formula to solve for mass

(density) x (volume) = mass

Add in the substitutes and solve for mass

1.98 g/mL x 2.45 mL = 4.858 g

3 0
3 years ago
Other questions:
  • During an experiment, a student adds 0.339 g of calcium metal to 100.0 mL of 2.05 M HCl. The student observes a temperature incr
    12·1 answer
  • In the disproportionation reaction CI2 + H2Omc021-1.jpgHCIO + HCI, what describes the oxidation states of the substance Cl?
    5·1 answer
  • The phase change h2(g) → h2(s) is called ________, and the enthalpy change, δh, for this phase change has a ________ sign.
    8·1 answer
  • Indicate the number of unpaired electrons for following: [noble gas]ns2np5
    9·1 answer
  • How do I balance chemical equations ?<br>​
    9·1 answer
  • Consider again the solution made by diluting 10.0 mL of the 0.50 M NaCl by adding distilled water until 100 mL of solution are p
    10·2 answers
  • How can the loss of one species potentially destroy a habitat?
    8·2 answers
  • The atomic masses of 79Br35 (50.69 percent) and 81Br35 (49.31 percent) are 78.9183361 and 80.916289 amu, respectively. Calculate
    15·1 answer
  • Which of the following is not a chemical change?
    7·1 answer
  • When an ionic compound dissolves in water, the individual ions first leave the crystal lattice and then each ion becomes surroun
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!