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
photoshop1234 [79]
3 years ago
8

What is the mass of H2O

Chemistry
1 answer:
Dovator [93]3 years ago
8 0

Answer:

The exact molecular mass is 18.01528 g/mol

Explanation:

Find this by adding the molecular masses of two hydrogen atoms and one oxygen atom.

You might be interested in
R-134a is contained in a frictionless piston-cylinder device. The initial temperaure of the mixture is 39.37 oC. Over an hour 40
Komok [63]

Solution :

Given :

Initial temperature of the refrigerant is :

$T_i=39.37 ^ \circ C$

   = ( 39.37 + 273 ) K

  = 312.3 K

Room which is maintained at constant temperature is :

$T_o=22 ^ \circ C$

    = (22+273) K

    = 295 K

The thermal energy transferred to the room is :

Q = 400 kJ

   = $400 \times 10^3 \ J$

Therefore, the total entropy generation during the thermal energy process is :

$\Delta S =\left[\frac{-Q}{T_i}+ \frac{+Q}{T_i}\right]$

Here, -Q = heat is leaving the system maintained at a temperature of $T_i$ K.

 +Q = heat is entering the system maintained at a temperature of $T_o$ K.    

Therefore, substituting the values :

$\Delta S =\left[\frac{-400\times 10^3}{312.3}+ \frac{400\times 10^3}{295}\right]$

      = [-1280.8197 + 1355.9322]

      = 75.1125 J/K

       = 0.0751125 kJ/K

      = 0.075 kJ/K

4 0
3 years ago
The total number of electron pairs in a nitrogen molecules.is:<br> a) 2<br> b) 3<br> c) 5<br> d) 7​
Mekhanik [1.2K]

7

nitrogen's atomic no. is 7 which is the amount of protons and the amount of protons is equal to the amount of electrons

3 0
3 years ago
What action leads to crystal formation in minerals?
babunello [35]
I believe the correct answer from the choices listed above is option D. The action that leads to crystal formation in minerals is that  atoms or molecules form repeating patterns. Minerals are known to have a crystalline structure in which they exhibit short range and long range patterns.
6 0
3 years ago
Read 2 more answers
A silver sphere has a mass of 5.492 g and a diameter of 10.0 mm. What is the density of silver metal in grams per cubic centimet
Blizzard [7]

Answer:

Explanat\rho=10.5\frac{g}{cm^3}ion:

Hello,

In this case, considering the given diameter which is related to a radius of 5.0 mm and the formula for the calculation of the volume of the sphere, its volume in cubic centimeters (5.00 mm = 0.5 cm) is then:

V=\frac{4}{3} \pi r^3=\frac{4}{3}*\pi*(0.5cm)^3\\\\V=0.524cm^3

In such a way, the density turns out:

\rho =\frac{m}{V} =\frac{5.492g}{0.048m^3} \\\\\rho=10.5\frac{g}{cm^3}

Best regards.

8 0
3 years ago
Earth is one of the planets in the ​
prisoha [69]

Answer:

moon obviously

Explanation:

........

6 0
3 years ago
Read 2 more answers
Other questions:
  • Describe how and when disinfectant agents are used
    12·1 answer
  • How does a hydrogen ion change into a hydrogen atom
    11·2 answers
  • What are the covalent bonds that form between atoms of different electronegativities called?
    15·2 answers
  • On the enzyme hexokinase, ATP reacts with glucose to produce glucose 6-phosphate and ADP five orders of magnitude faster than AT
    12·1 answer
  • A force of 30 N is applied to a screwdriver to pry the lid off of a can of paint. The screwdriver applies 75 N of force to the l
    11·1 answer
  • how many of the following elements have 2 unpaired electrons in the ground state? C, O, Ti, Si a) 1 b) 3 c) 4 d) 2
    15·2 answers
  • What type of reaction is Mg + Cl^2&gt;MgCl^2
    9·1 answer
  • How to remove acetone from a school chromebook
    15·2 answers
  • How many grams of barium sulfate, BaSO 4 , be precipitated when 2.25 moles of sodium sulfate , Na 2 SO 3 , reacts with an excess
    15·1 answer
  • Explain why Na, Mg, and Al are good conductors of electricity?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!