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]
2 years ago
7

Please Help me if you can!:) i appreciate anything.

Chemistry
1 answer:
enot [183]2 years ago
7 0

Explanation:

1

Number of nucleon =

Molarmassofnucleon

Massofatom

=

1.6726×10

−24

g/nucleon

3.32×10

−23

g

=19.8=20(approximately)

It is given that element comprises of 2 atoms

Hence,number of nucleon = 2×20=40

2

You have 4.70 mol H2O

There are two H atoms in 1 molecule H2O.

Therefore, there must be 2*4.70 = 9.40 mols H in 4.70 mols H2O.

How many mols O in 4.70 mols H2O? That's 4.70 mols, of course.

Said another way, you have 2 mols H for every 1 mol H2O and 1 mol O for every 1 mol H2O.

So for 50 mols H2O you have 100 mols H and 50 mol O.

You might be interested in
PLS HELP ASAP NO LINKS PLS
lisabon 2012 [21]

Answer:

Coal puts out more Co2 emissions than Oil or Gas and Nuclear energy plants don't put out any pollution.

Explanation:

Even though Coal is your answer it is actually a very clean form of generating energy. Not only is it very clean but it is the most effecient means. Solar and Wind power can't even come close to the production and turnover that Coal, Gas, and Oil can. Wind Turbines are so innefficent that they somtimes don't even pay off what it took to build them in thier lifetime of service. The production of Wind Turbines puts out more pollution than any of the Coal or Natural Gas Plants. Solar power is not very efficent either but it is on it's way. It is also very expensive.

3 0
2 years ago
Force acts on it.
BartSMP [9]

Answer:D.

Explanation:

4 0
3 years ago
Which statement is always true of the cathode in an electrochemical cell? Reduction occurs here. It is considered the "negative"
lara31 [8.8K]

Answer:

It Is Considered The "negative" Electrode

Explanation:

An electrochemical cell is an electrolytic cell that drives a non-spontaneous redox reaction through the application of electrical energy. This cell is used to decompose chemical compounds, in a process called electrolysis. An electrode at which reduction take place is called the cathode. In reduction, electrons travel toward the site of reduction such that the negative charge is on the cathode.

7 0
2 years ago
What is the average mass of an electron? A. 1 amu B. 1,837 amu C. 1/1,837
diamong [38]

Answer:

C. 1/1,837

Explanation:

3 0
3 years ago
a chemical reaction produced 2.50 moles of nitrogen gas. what volume in liters, does this gas sample occupy at STP? (show your w
Harrizon [31]

The volume of N₂ at STP=56 L

<h3>Further explanation</h3>

Given

2.5 moles of N₂

Required

The volume of the gas

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, the volume per mole of gas or the molar volume-Vm is 22.4 liters/mol.

So for 2.5 moles gas :

\tt 2.5\times 22.4=56~L

5 0
2 years ago
Other questions:
  • Convert 238 cm to the unit km. 0.00238 km 0.238 km 2.38 x 105 km 2.38 x 107 km
    14·1 answer
  • Which compounds yield hydrogen ions as the only positive ions in an aqueous solution?
    13·2 answers
  • What mass of CO2 can be produced from the decomposition of 4.8 moles of Fe2(CO3)3?
    15·1 answer
  • Elias serves a volleyball at a velocity of 16 m/s. The mass of the volleyball is 0.27 kg. What is the height of the volleyball a
    6·1 answer
  • At 0°c a bottle contains a 325 mL of water in its liquid state. What is the volume of the water after it freezes (at 0°C)?
    5·1 answer
  • 3. Which location is not a part of the Deep Space Network?
    12·1 answer
  • Describe a second degree burn ​
    12·1 answer
  • Think about a stalk of corn. You can see it has roots, a stalk, and leaves. You know it reproduces with pollen from the tassels
    15·1 answer
  • What is the definition of period?
    9·2 answers
  • Toluene contains a benzene ring with three double bonds in it,but still does not show any signs of undergoing a reaction with br
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!