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
lilavasa [31]
3 years ago
14

Potassium

Chemistry
1 answer:
ad-work [718]3 years ago
4 0

Answer:

  • We observe that hydrogen burns at mouth of beaker with blue flame and pop sound is heard. It is a chemical change.
You might be interested in
During a workout, you set the treadmill to a pace of 55.0m/min. How many minutes will you walk if you cover a distance of 7500ft
Licemer1 [7]
55 m=180.446 ft.
7500/180.446= approx. 41.56 minutes 
8 0
3 years ago
According to the following reaction, how many moles of oxygen gas are necessary to form 0.408 moles carbon dioxide?
Neporo4naja [7]

Answer:

2 molecules of oxygen are necessary

3 0
2 years ago
Why are metals good conductors of electric current
castortr0y [4]
An electric current can be carried through a metal by the free flow of the shared electrons. 
6 0
3 years ago
Read 2 more answers
A gas that has a volume of 28 liters, a temperature of 42°C, and an unknown pressure has its volume increased to 49 liters and i
Sedaia [141]

Answer:

7.35atm

Explanation:

Data obtained from the question include:

V1 = 28L

T1 = 42°C = 42 + 273 = 315K

P1 =?

V2 = 49L

T2 = 27°C = 27 + 273 = 300K

P2 = 4atm

Using P1V1/T1 = P2V2/T2, the original pressure can be obtained as follows:

P1V1/T1 = P2V2/T2

P1 x 28/315 = 4 x 49/300

Cross multiply to express in linear form

P1 x 28 x 300 = 315 x 4 x 49

Divide both side by 28 x 300

P1 = (315 x 4 x 49) /(28 x 300)

P1 = 7.35atm

Therefore, the original pressure is 7.35atm

8 0
3 years ago
Read 2 more answers
What is the molecular formula of a substance whose molar mass is 166.8 grams and its empirical formula is C2H4N2?
Tanzania [10]

Answer:

C4H2O6

Explanation:

8 0
3 years ago
Other questions:
  • How does a catalyst affect the activation energy of a chemical reaction?
    7·1 answer
  • What are the examples of all the non metals in the first twenty element​
    12·1 answer
  • How many electrons in an atom can share the quantum numbers n=2, l=1 and ml=1?
    7·2 answers
  • Choose an organism that you are familiar with, and explain how the three parts of the cell theory relate to the organism
    13·2 answers
  • Concept 1.2 Energy for Launch
    6·1 answer
  • HURRY
    14·1 answer
  • How many grams of hydrogen chloride can be produced from 1g of hydrogen and 55g of chlorine? What is the limiting reactant?
    13·1 answer
  • Explain why seeing a gas doesn not always indicate that there was a chemical change. ​
    7·1 answer
  • What type of clothing would you need to wear if you could visit the mesosphere
    10·1 answer
  • If the conjugate base of a molecule has a pkb of 1.4, what would you expect the molecule to be?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!