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
Alex_Xolod [135]
4 years ago
12

Why does chromium have a 3 charge? why is chromium (vi) oxide [cro3} not chromium 3 oxide?

Chemistry
1 answer:
Citrus2011 [14]4 years ago
6 0
Chromium (VI) has a 6+ charge (we can tell that from the number 6 after it) and you should know that Oxygen has a 2- charge (because it needs 2 more electrons to get a full outer shell).

To work out the formula we need to balance the positive and negative charges.

So we have 6+ and 2-...
We need to make 6- so therefore we times the amount of Oxygen by 3.

This makes the formula CrO3.

Hope this is helpful, message me if you have any questions :)
You might be interested in
What will happen if the density of an object is less than the density of water?
Lelechka [254]

Answer:

The object  will float on the surface of water if its density is less than the equal volume of water.

Explanation:

Density:

It is define as mass per unit volume.

d=m/v

it is mostly measure in g/mL

it is represented by ρ (rho)

The density of water is one gram per cubic centimeter. If the object is less denser than water it will float. If the density of object is greater than the density of water it will sink.

Other examples:

some rocks are more denser then water so they will sink in it.

density of oil is less than vinegar, so it will float on the surface of vinegar

4 0
3 years ago
Does the shape of molecule matter?​
Lelechka [254]
Yes because it helps determine the properties the molecule has.
6 0
3 years ago
Une con una línea el isótopo del hidrógeno con sus características respectivas.
Ira Lisetskai [31]

Answer:

I will help? But I don't understand.

7 0
3 years ago
A chemist investigates the
nevsk [136]

Answer:

1, 2 & 3

Explanation:

. A chemist investigates the boiling point, melting point, and flammability

of a compound called acetone, a component of nail polish remover.

Which of these properties are physical properties and which are

chemical properties?

Physical ( boiling point and melting point ).

Chemical ( flammability )

6 0
3 years ago
372 mL is the volume of Aluminum, density is 2.70 g/mL what is the mass in grams
podryga [215]

Answer:

930 g

Explanation:

D = m/V     Multiply both sides by V

m = VD

<em>Data: </em>

V = 372 cm³

D = 2.70 g/cm³

<em>Calculation: </em>

m = 372 × 2.50

m = 930 g

The mass of Al is 930 g.

7 0
3 years ago
Other questions:
  • As pressure decreases, density: does what increases,decreases, or stays the same
    6·2 answers
  • A change in odor can also be a clue that a chemical change has occurred. Describe at least one situation in which you might be l
    7·1 answer
  • A double-replacement reaction takes place when aqueous k2so4 reacts with aqueous pb(no3)2. you would expect the products of this
    9·2 answers
  • Calculate the time,speed is 100 m/s and distance is 2000 meter.​
    6·1 answer
  • Choose the words that make each statement true.
    10·1 answer
  • Glucose is broken down in different ways, both in the presence and in the absence of oxygen.
    6·2 answers
  • The electrons in an atoms outermost orbitals, the electrons, are represented in a(n) , which consists of the elements symbol, re
    8·1 answer
  • Explain concisely what is responsible for the variation of atomic radii in group 3A,4A,5A,6A
    8·2 answers
  • What happens when you drop a feather and hammer on the moon and why
    7·1 answer
  • Hi! This is a science question...
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!