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
svp [43]
3 years ago
6

Please help! Asap! :)

Chemistry
2 answers:
timama [110]3 years ago
4 0

The first one is true.

The second one is false.

Crazy boy [7]3 years ago
4 0
5. true (Energy cannot be created nor destroyed)
6. false (Potential energy does NOT increase over time)
You might be interested in
What is the velocity of a electron whose wavelength is 100 pm?
Anni [7]

Answer:

v = 7.3 × 10⁶ m/s

Explanation:

Given data:

Velocity of electron = ?

Wavelength = 100 pm

Solution:

Formula:

λ = h/mv

λ = wavelength

h = planck's constant

m = mass

v = velocity

Now we will put the values in formula.

100 ×10⁻¹² m = 6.63 × 10⁻³⁴ j.s / 9.109 × 10⁻³¹ kg ×  v

v = 6.63 × 10⁻³⁴ kg.m²/s /  9.109 × 10⁻³¹ kg ×100 ×10⁻¹² m

v = 6.63 × 10⁻³⁴ m/s /910.9 × 10⁻⁴³

v = 0.0073  × 10⁹ m/s

v = 7.3 × 10⁶ m/s

5 0
3 years ago
Use mathematics to prove that the 5.50 grams of salicylic acid (C7H6O3) used in this experiment is equal to 0.04 mol.
g100num [7]

Answer:

Please find the answer to the question below

Explanation:

In chemistry, the following mathematical formula is used to calculate the number of moles contained by a substance:

mole = mass of substance (g)/molar mass of substance (g/mol)

Molar mass of salicylic acid (C7H6O3) = 12(7) + 1(6) + 16(3)

= 84 + 6 + 48

= 138g/mol

Mass = 5.50grams

mole = 5.5/138

mole = 0.039

Approximately, the number of moles of 5.5grams of salicylic acid is 0.04moles. This is in accordance with the mole value (0.04) given in this question.

7 0
3 years ago
Please answer ASAP!!
Alenkasestr [34]

Answer:

C.0.28 V  

Explanation:

Using the standard cell potential we can find the standard cell potential for a voltaic cell as follows:

The most positive potential is the potential that will be more easily reduced. The other reaction will be the oxidized one. That means for the reactions:

Cu²⁺ + 2e⁻ → Cu E° = 0.52V

Ag⁺ + 1e⁻ → Ag E° = 0.80V

As the Cu will be oxidized:

Cu → Cu²⁺ + 2e⁻

The cell potential is:

E°Cell = E°cathode(reduced) - E°cathode(oxidized)

E°cell = 0.80V - (0.52V)

E°cell = 1.32V

Right answer is:

<h3>C.0.28 V </h3>

<h3 />

4 0
2 years ago
What is the difference between alkali metals and halogens?
Airida [17]
<h3>→soft and reactive metals. </h3>

Explanation:

<h3>Alkali metals are soft and reactive metals. They react vigorously with water and become more reactive. And other hand halogens are reactive non metals. ... Halogens can be solid, liquid, gaseous at room temperature and the melting point increase when they get bigger.</h3>

<h2>#CAREYINGTOLEARN❤️</h2>
4 0
2 years ago
Read 2 more answers
On a warm sunny day, a deer is searching something to drink. The deer is most likely responding to which kind of stimulus?
quester [9]

Answer:

External stimulus of thirst

4 0
3 years ago
Read 2 more answers
Other questions:
  • After taking a shower, you notice that small droplets of water cover the mirror. Explain how this happens. Be sure to describe w
    5·1 answer
  • How might cell division help multicellular organisms maintain and repair cells
    6·1 answer
  • How many moles of ethyl alcohol, C2H6O, are in a 16.0 g sample
    10·1 answer
  • What is the state of the substance at room temperature (20°c)
    10·1 answer
  • Which of the following metalsts diamagnetic?
    15·1 answer
  • Which of the following choices is an example of a nonvascular plant?
    9·1 answer
  • Do you really get 7 years of bad luck if you crack a mirror :(
    8·1 answer
  • Explain what keeps the electrons confined in the space surrounding the nucleus
    14·1 answer
  • How many unpaired electron are there is Co2+ ion
    14·1 answer
  • Animals communicate for various reasons, but one main reason is for reproduction. In what ways do animals communicate with other
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!