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
alexdok [17]
3 years ago
4

Please help i need this asap:(

Chemistry
1 answer:
Arte-miy333 [17]3 years ago
5 0
Depends on the charge of I think that’s chromium and i think that has a negative 1 charge so i’d say one but i’m not quite sure id look it up just in case
You might be interested in
The total volume of seawater is 1.5 x 10²¹ L. Seawater contains approximately 3.5% sodium chloride by mass. At that high of a co
garri49 [273]

Answer:

There are 5.408\times 10^{22} grams contained in all the seawater in the world.

Explanation:

At first let is determinate the total mass of seawater (m_{sw}), measured in grams, in the world by definition of density and considering that mass is distributed uniformly:

m_{sw} = \rho_{sw}\cdot V_{sw}

Where:

\rho_{sw} - Density of seawater, measured in grams per liters.

V_{sw} - Volume of seawater, measured in liters.

If V_{sw} = 1.5\times 10^{21}\,L and \rho_{sw} = 1030\,\frac{g}{L}, then:

m_{sw}=\left(1030\,\frac{g}{L} \right)\cdot (1.5\times 10^{21}\,L)

m_{sw} = 1.545\times 10^{24}\,g

The total mass of sodium chloride is determined by the following ratio:

r = \frac{m_{NaCl}}{m_{sw}}

m_{NaCl} = r\cdot m_{sw}

Given that m_{sw} = 1.545\times 10^{24}\,g and r = 0.035, the total mass of sodium chloride in all the seawater in the world is:

m_{NaCl} = 0.035\cdot (1.545\times 10^{24}\,g)

m_{NaCl} = 5.408\times 10^{22}\,g

There are 5.408\times 10^{22} grams contained in all the seawater in the world.

8 0
4 years ago
A. Only a small amount (less than 0.01%) of the enol form of diethyl malonate is present at equilibrium. Write a structural form
Karo-lina-s [1.5K]

Answer:

Please see attachment

Explanation:

Please see attachment

6 0
3 years ago
How can the existence of spectra help to prove that energy levels in atoms exist?
Liula [17]
The existence of spectra can help the existence of atoms by expanding and multiplying in the law of London Dispersion
6 0
3 years ago
A fuel cell designed to react grain alcohol with oxygen has the following net reaction:
sertanlavr [38]

Answer:

b. E = 2,28V

Explanation:

The maximum work is the same than ΔG. As ΔG could be written as:

ΔG = nFE <em>(1)</em>

Where n is moles of electrons transferred, F is faraday constant (96485 J/Vmol) and E is the voltage of the cell.

For the reaction:

CH₃OH(l) + ³/₂O₂(g) → CO₂(g) + 2H₂O(l)

The oxidation state of C in CH₃OH is -2 but in CO₂ is +4, that means transferred electrons are +4 - -2 = <em>6e⁻</em>

Replacing in (1):

1320x10³ J = 6mol e⁻×96485J/Vmol×E

<em>E = 2,28V</em>

<em></em>

I hope it helps!

8 0
4 years ago
A weather balloon was initially at a pressure of 0.950 atm, and its volume was 35.0 L. The pressure decreased to 0.750 atm, with
puteri [66]

Answer: The change in volume will be 9.30 L

Explanation:

To calculate the new pressure, we use the equation given by Boyle's law. This law states that pressure is directly proportional to the volume of the gas at constant temperature.

The equation given by this law is:

P_1V_1=P_2V_2

where,

P_1\text{ and }V_1 are initial pressure and volume.

P_2\text{ and }V_2 are final pressure and volume.

We are given:

P_1=0.950atm\\V_1=35.0L\\P_2=0.750atm\\V_2=?L

Putting values in above equation, we get:

0.950\times 35.0L=0.750\times V_2\\\\V_2=44.3L

The change in volume will be (44.3-35.0)L = 9.30 L

7 0
3 years ago
Other questions:
  • Why do liquids and gases take the shape of their containers while solids do not?
    12·2 answers
  • Calculate the amount of heat required to completely sublime 96.0 g of solid dry ice (co2) at its sublimation temperature. the he
    7·1 answer
  • In this reaction which substance behaves as the oxidizing agent pb
    8·1 answer
  • Explosive volcanic eruptions will hurl: hot cinders volcanic bombs lava pebbles large rocks all of the above
    9·2 answers
  • How many grams of Br are in 335g of CaBr2
    8·1 answer
  • Zn + 2HCl ---&gt; ZnCl2 + H2 1. Is the equation above balanced or unbalanced? How do you know? (Hint: How many atoms of each typ
    8·1 answer
  • 4. Find the pH at each of the following points in the titration of 25 mL of 0.3 M HF with 0.3 M NaOH. The Ka value is 6.6x10-4 a
    8·1 answer
  • Marvelous rides his bike with a constant speed of 6 miles per hour east. How long will he take to travel 21
    8·1 answer
  • 1. Given the specific heat of lead is 0.129 J/g.C and that it takes 93.4J of energy to
    15·1 answer
  • Marcus read that systems provide feedback, or the return of information. Feedback can either cause a change in the system or kee
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!