Which of these equations is balanced? a. H2SO4 + 2Al → Al2(SO4)3 + H2 b. 2KCl + Pb(NO3)2 → 2KNO3 + PbCl2

Answers

Answer 1
The answer is B, you just check if it is the same on the left and right side

A:
Left side - Right side
2xH - 2xH
1xS - 3xS
4xO - 12xO
2xAl - 2xAl

Therefore A is not correct

B:
Left side - right side
2xK - 2xK
1xCl - 1xCl
1xPb - 1xPb
2xN - 2xN
6xO - 6xO

B is therefore correct as both sides add up
Answer 2
a is not, left side has too little SO4
v is correct, it is balanced, just make sure the elements of each side are the same

Related Questions

Does hot water tend to rise or sink?

Answers

Hot Water tends to rise, just like warm air.

a chemical formula shows the kind and number of Atoms that form a what? compound, mixture, solution, or suspension

Answers

A chemical formula shows the kind and number of Atoms that form a compound

A chemical formula shows the kind and number of atoms that form a compound.

What is compound?

Any substance made up of similar molecules with atoms from two or more different chemical elements is referred to as a chemical compound.

Atoms from more than 100 different chemical elements, both in their pure forms and when mixed to form chemical compounds, make up all matter in the universe.

Atoms combine to form a compound. For example hydrogen when combine with oxygen it form a water.

A compound is a completely chemically pure entity that is created from two or more separate chemical ingredients. They are kept together by chemical bonding and have an established atom composition.

Therefore, A chemical formula shows the kind and number of atoms that form a compound.

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Which statement best describes the organelles in a cell?

A.

All organelles are involved directly with communication between cells.
B.

Organelles must work together and their activities must be coordinated.
C.

Organelles function only when there is a disruption in homeostasis.
D.

Each organelle must function independently of the others in order to maintain homeostasis.

Answers

B.

Organelles must work together and their activities must be coordinated.
Final answer:

The best description of organelles in a cell is that they must work together and have coordinated activities. Each organelle has a unique role that contributes to the cell's overall function, much like organs in a body.

Explanation:

The question asks which statement best describes the organelles in a cell. The correct answer is B. Organelles must work together and their activities must be coordinated. This is because in a cell, each organelle has a specific function, and they all contribute to the overall health and functionality of the cell, much like the organs in our body. The nucleus acts as the control center, containing DNA and orchestrating the activities of the cell. Cytosol provides the medium for biochemical reactions. The cytoskeleton supports the structure and scaffolds the organelles. Cells communicate with each other and their environment to respond to stimuli and maintain homeostasis. This coordination and communication are essential for the survival and operation of both single-celled and multicellular organisms.

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What type of elements are most likely to form more than one type of ion

Answers

Metals are the type of elements that are most likely to form more than one type of ion, for instance iron can form the ion of Fe^2+ or Fe^3+.

Answer: Naming Compounds and Writing Formulas

1. The elements most likely to form more than one type of ion are the____ Transition Metals

2. The name iron (ll) indicates that a compound contains___ Iron ions with a 2+ charge

3. Alkali metals, alkaline earth metals, and aluminum all form ions with positive charges equal to___ The group number

4. In the name carbon dioxide, the prefix of the second word indicates that molecule of carbon dioxide contains___Two oxygen atoms

Explanation:

FeO+HNO3➡
Chemistry reaction

Answers

Iron(II) oxide react with nitric acid to produce iron(III) nitrate, nitrogen dioxide and water. Chemical reaction. Balancing chemical equations.

Final answer:

The reactions listed are examples of redox reactions involving iron and various reagents, demonstrating the oxidation and reduction processes in iron chemistry when FeO reacts with HNO3 and other similar compounds.

Explanation:

The provided information suggests a variety of chemical reactions involving iron compounds reacting with different reagents. For instance, when FeO reacts with HNO3, a typical reaction might involve the iron(II) oxide (FeO) being oxidized to iron(III) nitrate, while nitric acid acts as the oxidizing agent and gets reduced in the process. Other reactions listed include the transformation of iron in different oxidation states, the reaction of iron compounds with bases and acids, and the decomposition of iron salts under heat.

These reactions represent a class of redox reactions, where transfer of electrons occurs, indicating changes in the oxidation states of the involved species. Examples given such as Fe being heated in air (oxidation), and the interaction of Fe(NO3)2 with HNO3 in the presence of air show the complexity and variety of iron chemistry.

which type of seismic wave produces the most severe ground movement?

Answers

The most destructive type of seismic waves is the surface wave. It travels more slowly than the s-waves, but they can be much larger in amplitude.

energy from the sun travels to the earth through
A. convection
B. carbon dioxide
C. radiation
D. infared radiation

Answers

Answer:

D. Infrared Radiation

I hope this helps.

List the five characteristics a substance must have to be a mineral. Explain why coal and a glass marble are not minerals.


(This is chemistry right?)

Answers

- Naturally occurring
- Inorganic
- Solid
- Definite chemical composition
- Ordered internal structure
A mineral has to be naturally occurring. Coal is not a mineral because it is carbon-based and comes from fossilized plants. Glass is non-crystalline solid.
Final answer:

A mineral must be naturally occurring, inorganic, solid, have a definite chemical composition, and an ordered internal structure. Coal and glass marbles are not minerals because coal comes from organic matter and glass marbles lack crystal structure and are not naturally occurring.

Explanation:

A substance must have five distinct characteristics to be considered a mineral. These characteristics include 1) being naturally occurring, 2) being inorganic, 3) being solid, 4) having a definite chemical composition, and 5) having an ordered internal structure. Coal is not considered a mineral because it comes from organic matter (plant remains). Glass marbles are not minerals because they do not have a crystal structure, and they are man-made, not naturally occurring.

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If a urine sample has a pH of 4.60, calculate the concentrations of H3O+ and OH- in the sample

Answers

A. pH = 6.0 = - log [H3O+]
taking anti log both sides we have
10^-6 = [H3O+] (Answer)
[OH^-] = Kw/[H3O+]
= 1x 10^-14/10^-6
= 10^-8 (Answer)
B and C try yourself

pH = 6.0 = - log [H3O+] taking anti log both sides we have 10^-6 = [H3O+]  [OH^-] = Kw/[H3O+] = 1x 10^-14/10^-6 = 10^-8.

What is pH?

pH is a numerical indicator of how acidic or basic aqueous or other liquid solutions are. The phrase, which is frequently used in chemistry, biology, and agronomy, converts the hydrogen ion concentration, which typically ranges between 1 and 1014 gram-equivalents per liter, into numbers between 0 and 14.

The hydrogen ion concentration in pure water, which has a pH of 7, is 107 gram-equivalents per liter, making it neutral (neither acidic nor alkaline). A solution with a pH below 7 is referred to as acidic, and one with a pH over 7 is referred to as basic, or alkaline.

The first employed the measurement to describe the hydrogen ion concentration of an aqueous solution, expressed in equivalents per liter.

Therefore, pH = 6.0 = - log [H3O+] taking anti log both sides we have 10^-6 = [H3O+]  [OH^-] = Kw/[H3O+] = 1x 10^-14/10^-6 = 10^-8.

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Electrons move in what is called an atoms electron _______. Plz help me

Answers

Electrons move in what is called an electron cloud. Each atom has its own electron cloud associated with it. This region simply represents an area or likelihood within that an electron of corresponding energy can be found within.

What can you infer about the volume of an object imagined with a greater mass?

Answers

We tend to think the greater the mass, the greater the volume but that is not true.  What weighs more a pound of lead or a pound of feathers?  Obviously they are the same however there would be a lot more feathers than lead.  Mass and volume are not really related.

the practice of plowing fields along the curves of a slope is called?

Answers

Contour plowing is the practice of plowing fields along the curves of a slope.

Answer:

Contour Plowing

Explanation:

Each of the compounds that you tests contained chlorine, which is a poisonous gas. Why was this test safe to perform (it was, or your lungs would have turned to mush) without a gas mask?

Answers

Chlorine Gas by itself is dangerous

Many compounds we use often contain chlorine, but we are still alive. When chlorine is part of a compound, such as table salt (NaCl) it remains fairly unreactive. It becomes dangerous when it's in the form Cl2. This is chlorine gas and it is quite reactive.

Which of the following substances has

a higher melting point than water?

A salt

B sugar

C flour

D all of the above

Answers

D.  all of the above, although I do find it hard to believe something like flour would have a melting point, I looked up my answer to double check. 

Answer:

D all of the above

Explanation:

Melting point represents the exact temperature at which the solid state changes to the liquid of a given substance. Water is one of the most commonly used elements to exemplify the melting point principle. For this solid state (ice) to take the form of liquid water, it must be exposed to a temperature of at least 0 °C. Thus, the melting point of water is equal to 0 °C.

The salt has a melting point of 801 ° C, the melting point of sugar is 185 ° C and the melting point of flour is 264 ° C. From this we can see that all these products have a higher melting point than water.

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