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
Svet_ta [14]
2 years ago
14

Help me answer these science questions plz help plzzz questions 18,20,21

Chemistry
1 answer:
zepelin [54]2 years ago
8 0
Idk 18 but here is 20

conductor-a substance that readily conducts
insulator-a substance that does not readily allow the passage of heat or sound
ammeter-an instrument for measuring electric current in amperes.
voltmeter- an instrument for measuring electric potential in volts
current-a flow of electricity which results from the ordered directional movement of electrically charged particles.
potential difference-the difference of electrical potential between two points.
ohmic resistor- resistors that have a constant resistance
non-ohmic resistor- a resistor that's resistance increases as the current increase
power-the capacity or ability to direct or influence the behavior of others or the course of events.
You might be interested in
A star is mainly made of hydrogen gas, but most classes of stars include other elements such as helium, calcium, and other heavi
Xelga [282]
That would be true, since most other stats include helium, calcium, etc
6 0
2 years ago
Read 2 more answers
Compare 1 mole of H2, 1 mole of O2, and 1 mole of F2. (a) Which has the largest number of molecules? Explain why. (b) Which has
AURORKA [14]

<u>a) Answer: </u>

<em>Number of molecules in 1 mole</em>

<u>Explanation:</u>

a) Whether we take any of the substance among all three of the given substances they will have the same number of molecules in 1 mole of the substance is considered and the value for this will be 6.023 x 10^23

<u>b)  Answer: </u>

<em>In the given question </em><em>mass of the substance</em><em> which is </em><em>greatest</em><em> is asked for </em><em>one mole</em><em> and we also know that </em><em>mass of one mole is given by molar mass.  </em>

<u>Explanation:</u>

b) It is known that 31.98g/mol is the molar mass for oxygen which is greater than that of hydrogen while fluorine has a molar mass of 38.0 g/mol which on comparison shows that, it is the highest amongst all three.

3 0
3 years ago
Calculate the percent by mass of carbon in CO2 (carbon dioxide). Please show all work.
anygoal [31]
%C= 12/12 + 2·16=0,273=27,3%.
6 0
3 years ago
Which symbol represents a salt?<br><br> C2H2<br><br><br> NaCl<br><br><br> O2<br><br><br> C6H12O6
True [87]

Answer:

NaCl

Explanation:

represents table salt

3 0
3 years ago
Read 2 more answers
What's the difference between gold and other metals
Zanzabum
Well, gold is way different form other say for instance what if you get a really good ring not to expensive or cheap, but its in between those characteristics what if u get a gold ring to compare now one might tarnish or fade, but if you really look at it that gold one will not it really all dependents on what metals your talking about cause all metals aren't the same some fade and some don't . Also the oxygen level is weak for other metals, but gold it different it can still keeps its shine .

 - That's the best explanation i can give IF ITS NOT ENUH OR NOT RIGHT JUH COMMENT BELOWW↓↓ I WILL THINK OF SOMEThING ELSE THANKS! YOU HAVE A GREAT DAYY .
5 0
2 years ago
Other questions:
  • Heat is transferred from the heating element to the pot to the boiling water. What is the MOST likely method of heat transfer?
    12·2 answers
  • Why don't planets crash into the Sun from the pull of gravity?
    7·1 answer
  • A combustion analysis of 5.214 g of a compound yields 5.34 g co 2 ​ , 1.09 g h 2 ​ o, and 1.70 g n 2 ​ . if the molar mass of th
    15·2 answers
  • At 1 atm, how much energy is required to heat 39.0 g of h2o(s at –24.0 °c to h2o(g at 121.0 °c?
    13·1 answer
  • A solution is made by mixing equal masses of methanol, CH4O, and ethanol, C2H6O. Determine the mole fraction of each component t
    5·1 answer
  • In which molecule is hydrogen bonding most important?
    13·1 answer
  • 1.    Personality can be determined by genetics or environment<br>​
    11·2 answers
  • Given this balanced equation: CS2 + 3 O2 CO2 + 2 SO2
    13·1 answer
  • The reaction responsible for producing the heat that maintains the temperature of your body is
    14·1 answer
  • Whats the most common chemical element in the earths crust?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!