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
soldier1979 [14.2K]
3 years ago
9

select the equations that are correctly balanced. h2o 2o2? h2o2 fe2o3 3h2? 2fe 3h2o al 3br2? albr3 caco3? cao co2 can you clarif

y the equation symbols please.
Chemistry
1 answer:
natta225 [31]3 years ago
8 0
<span>The choices are as follows:
h2o + 2o2 = h2o2
 fe2o3 + 3h2 = 2fe + 3h2o
al + 3br2 = albr3
caco3 = </span><span>cao + co2

The correct answers would be the second and the last option. The equations that are correctly balanced are:

</span> fe2o3 + 3h2 = 2fe + 3h2o 
caco3 = cao + co2

To balance, it should be that the number of atoms of each element in the reactant and the product side is equal.
You might be interested in
This graph illustrates that, under conditions of constant pressure, as the temperature of liquid water increases, its volume ___
Lunna [17]
it varies.........................
8 0
3 years ago
A higher than normal high tide is called
alina1380 [7]
It is called a spring tide
8 0
3 years ago
the mass of a single potassium atom is 6.50×10-23 grams. How many potassium atoms would there be in 114 milligrams of potassium?
Nataly [62]

Answer:LOL

42

Explanation:

8 0
2 years ago
Iron fluoride (FeF2) dissociates according to the following equation:
melomori [17]

Answer:

S = 0.788 g/L

Explanation:

The solubility product (Kps) is an equilibrium solubization constant, which can be calculated by the equation:

Kps = \frac{[product]^x}{[reagent]^y}

Where x and y are the stoichiometric coefficients of the product and the reagent, respectively. Because of the aggregation form, the concentration of solids is always equal to 1 for use in this equation.

Analyzing the equation, we see that for 1 mol of Fe^{+2} is necessary 2 mols of F^-, so if we call "x" the molar concentration of Fe^2, for F^- we will have 2x, so:

Kps = [Fe^{+2}].[F^-]^2\\\\2.36x10^{-6} = x(2x)^2\\\\2.36x10^{-6} = 4x^3\\\\x^3 = 5.9x10^{-7}\\\\x = \sqrt[3]{5.9x10^{-7}} \\\\x = 8.4x10^{-3} mol/L

So, to calculate the solubility (S) of FeF2, which is in g/L, we multiply this concentration by the molar mass of FeF2, which is:

Fe = 55.8 g/mol

F = 19 g/mol

FeF2 = Fe + 2xF = 55.8 + 2x19 = 93.8 g/mol

So,

[tex]S = 8.4x10^{-3}x93.8

S = 0.788 g/L

4 0
3 years ago
Which answer is the best comparison of the physical sciences to the life sciences. A. Physical science is the study of energy an
Yanka [14]

Answer:

A. Physical science is the study of energy and inanimate matter. Life science is the study of living organisms.

Explanation:

Sciences can be grouped into physical science and life sciences. PHYSICAL SCIENCE is a branch of science that involves the study of energy and inanimate objects i.e lifeless. Physical science encompass the following: physics, chemistry, astronomy, geology etc.

On the other hand, LIFE SCIENCES, as the name implies, is the study of living organisms. It is also referred collectively to as BIOLOGICAL SCIENCES and it includes aspects such as biology, botany (plant), zoology (animal), microbiology (microbes), biochemistry etc.

4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the name of the chemical formula Ti3(PO4)2
    9·1 answer
  • Is the dissolving process for most salts endothermic or exothermic?
    6·1 answer
  • If the temperature of an object is 335 K, how would this be expressed on the Celsius scale?
    11·1 answer
  • PLEASE ASSIST MEEEEEEE!!!!!!!!! 40 POINTS
    13·1 answer
  • 10. What two effects can the wrong pH have on an enzyme?
    14·1 answer
  • Sacar los números cuánticos de cobalto (Co)Z=27
    15·1 answer
  • Finalmente responde:
    9·1 answer
  • Explain how the solubility of water is useful in maintaining various life processes.
    13·1 answer
  • cott and James work at a grocery store. After the grocery store closed, they were playing a game with a shopping cart and Scott’
    15·2 answers
  • What's the volume of 0.2 mol of hydrogen at STP.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!