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
Schach [20]
3 years ago
11

Are the activities exothermic or endothermic?​

Chemistry
1 answer:
Alexandra [31]3 years ago
6 0

Answer:

The first 5 are exothermic reaction because heat is in product means heat is evolved or given out.

And last no reaction shows that heat is required so last reaction is endothermic reaction.

Explanation:

And heat is evolved in exothermic reaction and heat is absorbed in endo thermic reaction

You might be interested in
The following equation lnN - N₀ = -kt Of time t is plotted on x-axis and lnN is plotted on y-axis, what are the slopes and y-int
stepladder [879]

Answer:

-k slope

The term No is the y intercept(does not mean NO) y-intercept

Explanation:

For a straight line graph, the normal equation could be written as

y = mx + c

Where m is the slope and c is the y intercept.

Writing the equation is the form of y = mx + c gives the following;

lnN = -kt + No

As obtained from the question, t is plotted in the x-axis, while lnN is the plot on the y-axis.

Now, we are asked to obtain the slope and the y-intercept. It can be seen that the slope is the coefficient of the term x in this case t. Hence, our slope is -k.

The y-intercept is the other term which in this case is No

6 0
3 years ago
Convert each of the following measures in length 1.1cm to meters​
trasher [3.6K]

Answer:

what measures

Explanation:

7 0
3 years ago
Read 2 more answers
As a result of the transfer of an electron from a less electronegative atom to a more electronegative atom,
Viktor [21]

<u>Answer:</u> The correct answer is Option d.

<u>Explanation:</u>

Electronegativity is defined as the tendency of an element to attract the shared pair of electron towards itself in a compound.

When electron is transferred from less electronegative atom to more electronegative atom.

The atom which is more electronegative gains electron and undergoes reduction reaction.

Reduction reaction is defined as the reaction in which an atom gains electrons. The oxidation number of the atom gets reduced during this reaction.

X^{n+}+ne^-\rightarrow X

During the transfer of electrons, energy is released when an electron looses is potential energy during the transfer.

Hence, the correct answer is Option d.

4 0
3 years ago
When calculating the average atomic mass, which of the following are needed for each isotope? Select all that apply.
Alexeev081 [22]

Answer:

number of protons, mass and atomic number

Explanation:

7 0
3 years ago
Please help me. ? :)
BaLLatris [955]

Answers and explanation:

To answer these questions you use a periodic table.

A is In because it has 49 protons and In is element number 49.

B is 27 because Co is element number 27.

C is 73 because Ta is element number 73.

D is 49 because the number of electrons in an atoms is always equal to the number of protons.

E is 56 because the atomic number of Ba is 56.

F is 54 because 56 - 54 = 2. The charge is equal to the number of protons minus the number of electrons.

G is 66. The number of neutrons is equal to the atomic mass minus the number of protons. 115 - 49 = 66.

H is 108 because 181 - 73 = 108.

I is 32. The atomic mass of an element is equal to the amount of protons plus the amount of neutrons. So 16 + 16 = 32.

3 0
4 years ago
Other questions:
  • ..
    13·2 answers
  • How many grams of lithium are in 6.02*10^21 atoms
    5·1 answer
  • 4.True or false. P(E) + P(Ec) = 1.
    9·1 answer
  • The atoms or molecules in solids have no motion. true or false
    10·1 answer
  • Affinity chromatography is used to purify a protein of interest by capturing it on Select one:
    7·1 answer
  • How many moles of water are required to produce 2.15 mol oxygen gas in this reaction
    9·1 answer
  • Pt2 science......<br><br> Select correct answer ♡!
    11·1 answer
  • An unknown metal with a mass of 585.6 grams, changes temperature from 46.5°C to 84.5°C when it absorbs 795J of energy. Find spec
    6·1 answer
  • The initial volume of a gas at a pressure of 3 atm is 5.2 L. What will the volume be if the pressure is increased to 15 atm?
    7·1 answer
  • If you aint stephanie dont anwer​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!