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
kompoz [17]
3 years ago
9

Which of these is a element: Salad, Sugar, Water, or Potassium

Chemistry
1 answer:
vovikov84 [41]3 years ago
3 0

Potassium is a chemical element

Symbol: K

Atomic number: 19

Atomic mass: 39.0983 u ± 0.0001 u

Electron configuration: [Ar] 4s1

Melting point: 146.3°F (63.5°C)

You might be interested in
If an organism reproduces quickly, its population can ________ faster.
Alexus [3.1K]
If an organism reproduces quickly, its population can evolve faster.
5 0
3 years ago
Read 2 more answers
Which of the following would have the best thermal insulation properties? A. A paper cup B. a plastic cup C. a thick mug D. a cu
Vadim26 [7]

<em>From the above options, the best </em><em>Thermal insulator </em><em>will be a </em><em>Plastic cup.</em>

Option (b);

<u>Explanation</u>

Thermal insulators resist to conduct energy or reduction of heat transfer when objects come across in contact with radiation or higher heat object. To conduct energy we need metal or those materials which contain free electrons in it to move from one metal to another.

Plastic doesn't have metallic character so it will resist the heat up to some threshold. Mostly this material is used in separating two current-conducting material. There are many other examples of thermal insulator such as Rubber, fabrics, paper, wood, wool.

6 0
3 years ago
Read 2 more answers
How many bananas are equal to 7.50 moles of bananas?​
Veseljchak [2.6K]

Answer:

4.52×10^24

Explanation:

N = n × Na

where; N = no. of bananas

n = no. of moles

Na = Avogadro's constant

Which is 6.02×10^23

N = 7.5 × 6.02×10^23

N =4.515×10^24

7 0
3 years ago
How many moles of water are produced when 5 moles of hydrogen gas react with 2 moles of oxygen gas?
Marysya12 [62]

4 moles of water are produced

Explanation:

  • 4 moles of water are produced when 5 moles of hydrogen is reacted with 2 moles of oxygen gas
  • The balanced equation given is when 2 moles of hydrogen reacts with 1 mole of oxygen and it forms 2 moles of water.
  • The equation we have to solve is the 5 moles of hydrogen is reacting with 2 moles of oxygen gas, we can write the equation as 5H_{2} +2O_{2} -->  4H_{2} O + H_{2}
  • This is the balanced equation when 5 moles of hydrogen reacts with 2 moles of oxygen. The balanced equation means the number of hydrogen atoms and oxygen atoms on both sides would be equal in number.
4 0
3 years ago
Why are enzymes important to cells? They help bring about chemical reactions. They provide structural support. They form the two
topjm [15]
They help bring about chemical reactions. This is because enzymes act as catalysts, lowering the activation energy required for a chemical reaction to initiate. It is in this way that they bring about chemical reactions.
4 0
3 years ago
Read 2 more answers
Other questions:
  • If .75 moles of ammonia is needed, how many grams of nitrogen will be consumed?
    15·1 answer
  • If an item takes up 1 mL of space and has a mass of 3 grams what is the density
    12·1 answer
  • Which system starts the process of breathing?<br> A. nervous<br> B. muscular<br> C. circulatory
    9·2 answers
  • What is the type of bonding in a molecule of sulfur dioxide?​
    11·1 answer
  • How many oxygen atoms are in one molecule of baking soda
    12·1 answer
  • Calculate the percent by mass of the solute in an aqueous solution of 27.2 g ethanol in 250 g of total solution.
    8·1 answer
  • Where do you find the protons and neutrons of an atom?
    12·1 answer
  • Balance the following equation representing the reaction: 
    14·2 answers
  • In an experiment, a scientist adds radioactive oxygen to different parts of the environment in which he grows his plants. Based
    15·1 answer
  • 8
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!