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
xz_007 [3.2K]
3 years ago
12

PLEASE HELP I HAVE LIMITED TIME!!

Chemistry
1 answer:
n200080 [17]3 years ago
3 0

Answer:

Explanation:

Si tomamos en cuenta el peso molecular del agua, que es equivalente a:

1 Átomo de H₂O

O = 16 gr/mol

H = 1 gr/mol

H₂O = 18 gr/mol

Teóricamente sabemos que en 1 mol de H2O habrá 18 gr.

 

Para obtener los moles presentes en 1 mg de H₂O, (como 1 gr = 1000 mg), decimos:

1 mol H2O …………………………..  18000 mg

       X          ……………………………   1 mg

X = 1 / 18000 = 5,56 X 10⁻⁵ moles de H20

 

Y para obtener la cantidad de moléculas presentes, de acuerdo a los moles, multiplicamos por el número de Avogadro (6,023 X 10²³ moléculas /mol)

Moléculas de H₂O = 5,56x 10⁻⁵ mol x 6,023 x 10²³

Moléculas de H₂O = 3,34488 x10¹⁹ moléculas de H₂O

En el copo de nieve habrá 3,34488 x 10¹⁹ moléculas de H₂O.

Espero que te sirva =)

You might be interested in
How are physical and chemical changes similar?
mr Goodwill [35]
I believe the correct response is the first option.
7 0
3 years ago
Read 2 more answers
Assume that acid rain has lowered the ph of a particular lake to ph 5.0. what is the hydroxide ion concentration of this lake?
Ray Of Light [21]

That acid rain has lowered the ph of a particular lake to ph 5.0. the hydroxide ion concentration of this lake is

1 × 10^-9 mol of hydroxide ions per liter of lake water

 pH  +  pOH  =  14

 pOH  =  14  - 5

 pOH  =  9.00

 pOH  =  -log [OH⁻]

[OH⁻]  =  10^-pOH

[OH⁻]  = 10^{-9} mol

Therefore,

the hydroxide ion concentration of this lake is 1 × 10^-9 mol

To learn more about Concentration

brainly.com/question/10725862

#SPJ4

5 0
1 year ago
A double-replacement reaction takes place when aqueous Na,co, reacts with aqueous Sn(NO3), according to the following equation.
Vladimir [108]

Answer:

Sn(CO_3)_2 and NaNO_3.

Explanation:

Hello there!

In this case, according to the described chemical reaction between sodium carbonate and tin nitrate, we can write the undergoing chemical reaction:

2Na_2CO_3+Sn(NO_3)_4\rightarrow Sn(CO_3)_2+4NaNO_3

Thus, we notice that the products are strontium carbonate and sodium nitrate, whose formulas are Sn(CO_3)_2 and NaNO_3 respectively.

Best regards!

8 0
3 years ago
a compound with known empirical formula nh2 has a mass spectrum with a large peak at 32. what is the molecular formula of this s
Vikentia [17]

Answer:

it is 32.

Explanation:

I took the quiz and got 100

5 0
3 years ago
A 3.0-liter sample of an ideal gas is at a pressure of 2.5 atm at 15oC. (i) How many moles of gas are in the sample? (ii) If the
Rama09 [41]

Explanation:

here are the answers. Note that because the pressure is constant, you can use Gay Lussac's formula

6 0
3 years ago
Other questions:
  • A sample of gas has a volume of 4.4 liters when the pressure is 3.3atm. What is the volume when the pressure is reduced to 2.2at
    8·1 answer
  • Mass is measured against a standard using a
    11·1 answer
  • What is the highest electronegativity value in the periodic table?
    10·1 answer
  • The degree to which a liquid resists flowing is called _____.density viscosity conductivity malleability
    13·2 answers
  • What is the molarity of a solution that contains 87.75g of NaCI in 500.ml of solution
    12·1 answer
  • how does the structure of atoms (i.e. protons, neutron, and electrons) affect the electric charge of an object or substance.
    8·1 answer
  • How do you know if a chemical reaction has occurred?
    10·1 answer
  • Upvoting all answers !!
    12·2 answers
  • Conduction is a method of energy transfer within Earth’s systems. Describe an example of conduction, including where the energy
    7·1 answer
  • ii. If the pressure after landing was 1.0 atm, what was the volume of the passenger's collapsed water bottle? (Assume the bottle
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!