Can someone help me please!!

Can Someone Help Me Please!!

Answers

Answer 1

Answer:

1. AgNO₃ (aq) + NaCl (aq) ----> NaNO₃ (aq) + AgCl (s)

2. Li₂SO₄ (aq) + BaCl₂ (aq) ----> 2 LiCl (aq) + BaSO₄ (s)

3. 2 NaOH (aq) + MgCl₂ (aq) ----> 2 NaCl (aq) + Mg(OH)₂ (s)

Explanation:

The reaction involving the mixing of two soluble solutions to produce a precipitate is known as a precipitation reaction.

A precipitation reaction is double-replacement reaction (a reaction that exchanges the cations or the anions of two ionic compounds) in which one product is a solid precipitate.

Precipitation reactions at useful in the identification of various ions present in a solution. In order to predict the reactions that will produce a precipitate, solubility rules as given in the solubility table below can be used.

From the tables, the reactions that will produce a precipitate, as well as their balanced molecular equations are as follows:

1. AgNO₃ (aq) + NaCl (aq) ----> NaNO₃ (aq) + AgCl (s)

2. Li₂SO₄ (aq) + BaCl₂ (aq) ----> 2 LiCl (aq) + BaSO₄ (s)

3. 2 NaOH (aq) + MgCl₂ (aq) ----> 2 NaCl (aq) + Mg(OH)₂ (s)

Can Someone Help Me Please!!

Related Questions

If 0.1 M solution of CH3COOH of acetic acid will beis 0.01 % ionized in aqueous solution,the ionization constant

a. 10^-7 .
b. 10^-5 .
c. 10^-3 .
d. 10^-9

Answers

I think the answer is B

Answer:

its answer b

Explanation:

In this project, you will develop a model of a chemical reaction that either releases energy or absorbs energy. Whether a reaction releases or absorbs energy depends on the overall difference in the bond energies of the reactants and products. Your model should show the relationships between the parts of the system. These parts are the molecules and atoms that take part in the reaction. The model should also distinguish the reaction system from other systems.

Answers

Answer:

that ain't chemistry that's science

1. There are basic particles from which matter could
be made except
salt.
B
atom.
Cion.
D molecules.​

Answers

Answer: Hello, There! your Answer is Below

Option A Salt

Explanation:

Salt is A Chemical Used For Varites of Purposes, So It's not Part of Matter.

Atom being the Smallest Part of  Molecule And ion Are Charge  Which is  Part of Matter.

Hope this helps!!

Have a great day!!!

atoms that have a high electronegativity...

Answers

Helium, bromine, agron, neon,flourine

I take in oxgyen from the air and send it into your bloodstream. I also remove the carbon dioxide from your body. What system am I?
muscular system
respiratory system
digestive system
skeletal system please help

Answers

Respiratory system.

please help me please

Answers

Answer:

Two advantages are: Its cheap and it is a renewable energy source. Two disadvantages are it's not windy everyday and it will take up a lot of space for windmills.

Explanation:

Which of the following is NOT one of the three layers that terrestrial worlds have?

Core


Crust


Mantle


Seismic zone

Answers

It’s the Seismic zone

A tree can be a _________________________ for insects in a schoolyard.

Answers

Answer:

habitat/shelter

Explanation:

What is the name of the compound Cd(MnO4)2?
A
cadmium manganate
B.
cadmium manganite
C.
cadmium permanganate
O
D.
admium permanganite

Answers

C ) cadmium permanganate

IM GIVING 100 POINTS FOR WHOEVER ANSWERS THIS PLS HELP determine which heat transfers below are due to the process of conduction. I) You walk barefoot on the hot street and it burns your toes. II) When you get into a car with hot black leather seats in the middle of the summer and your skin starts to get burned when you touch the seats. III) A flame heats the air inside a hot air balloon and the balloon rises. IV) A boy sits to the side of a campfire. He is 10 feet away, but still feels warm. Question 1 options: I & II III & IV I, II, & IV II, III, IV

Answers

Answer:

I and II

Explanation:

In many cases, a negatively charged compound (ex Cl-) will interact with a positively charged metal (ex Fe2 ). Usually we would consider this type of interaction to be ionic, but in the case of metals we do not. What type of bond is being formed when a ligand interacts with a metal and how could you know that the bond you are forming is that type of bond

Answers

Answer:

See Explanation

Explanation:

An ionic bond occurs due to electrostatic attraction between a positively charged ion and a negatively charged ion.

A metal and a ligand are bound by a coordinate covalent bond or a dative bond. This bond occurs due to donation of electron pairs from ligands to available orbitals on metals.

The formation of coordinate bonds is evident when neutral molecules or negative ions with non bonding electrons donate same to empty metal orbitals. This is sometimes shown by an arrow pointing from the ligands to the metal center.

For instance; tetraammine copper II ion is formed when four ammonia molecules donate a lone pair each to available vacant orbitals of the copper metal center to form [Cu(NH3)4]^2+.

The limestone used in building the Egyptian pyramids was used because it is _____________
O soft and sticky
O easily melted
O hard and brittle

Answers

Answer:

hard and brittle

hope this helps you ☺️☺️

good night take care sweet dream

Easily melted


The answer is on here already but ya that’s the answer

Given the following skeleton equation, what are the coefficients for the chemicals in the reaction? __ FeSO4 + __ Al(OH)3 → __ Al2(SO4)3 + __ Fe(OH)2

Answers

3 FeSO4 + 2 Al(OH)3 -> 1 Al2(SO4)3 + 3 Fe(OH)2

Answer:

3 FeSO4 + 2 Al(OH)3 -> 1 Al2(SO4)3 + 3 Fe(OH)2

Explanation:

In exothermic reactions, the system
in energy.
energy, while the surroundings
*
absorbs, increase
absorbs, decrease
releases, increase
releases, decrease

Answers

Answer:

releases, increase

Explanation:

The total energy of products in an Exothermic reaction is less compare to

total energy of the reactants. As a result of these the enthalpy becomes negative, then there is release of heat to the surroundings, which increase the energy of the immediate surroundings inform of heat. Hence the system release energy while the surroundings energy increase.

2
A student put 25.0 cm of dilute hydrochloric acid into a conical flask.
The student added 2.5g of solid sodium carbonate and measured the change in temperature of
the mixture.
Which apparatus does the student need to use to obtain the most accurate results?
A balance, measuring cylinder, thermometer
B balance, pipette, stopwatch
C balance, pipette, thermometer
D
burette, pipette, thermometer

Answers

Answer:

A balance, measuring cylinder, thermometer

Explanation:

In this experiment, three things are really required and they are;

A balance Measuring cylinderThermometer

A balance is used to measure out the mass of 2.5g of solid sodium carbonate.

A measuring cylinder is used to measure out the 25.0 cm of dilute hydrochloric acid into a conical flask.

Lastly, a thermometer is used to monitor the change in temperature.

Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equation.

______ + Cacl2 → H2O

Answers

Answer: [tex]Ca(OH)_2+2HCl\rightarrow CaCl_2+2H_2O[/tex]

Explanation:

Neutralization is a chemical reaction where an acid reacts with a base to form salt and water.

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.

The balanced chemical equation will be:

[tex]Ca(OH)_2+2HCl\rightarrow CaCl_2+2H_2O[/tex]

Thus the reactants are calcium hydroxide [tex](Ca(OH)_2[/tex] and hydrochloric acid [tex](HCl)[/tex]

Convert 2.178×1010 g to each of the following units.

Answers

Answer:

2.178x10⁷kg, 2.178x10¹³mg, 2.178x10¹⁶μg, 2.178x10⁴ metric tons.

Explanation:

The units are kg, μg, mg and metric tons (1metric ton = 1000kg)

To solve this question we must convert, first, the grams to milligrams, and to kilograms. Then, the kilograms to metric tons and the milligrams to micrograms:

kg:

2.178x10¹⁰g * (1kg / 1000g) = 2.178x10⁷kg

mg:

2.178x10¹⁰g * (1000mg / 1g) = 2.178x10¹³mg

μg:

2.178x10¹³mg * (1000μg / 1mg) = 2.178x10¹⁶μg

metric tons:

2.178x10⁷kg * (1metric ton / 1000kg) = 2.178x10⁴ metric tons

Dissolving salt in water causes a CHEMICAL change. true or false

Answers

Answer:

False. It is a PHYSICAL change.

What is the phase label on HCl?


A. g

B. aq

C.

D. e

E. s

Answers

Answer:

B. aq if the reaction is inorganic (double or single displacement), neutralization, etc.

Explanation:

Hello there!

In this case, unfortunately we are not given the undergoing chemical reaction; however, in the most of the double displacement, neutralization, precipitation and in general, inorganic reactions, the hydrochloric acid must be B. aq as it must be dissolved in water as the reaction media. On the other hand, in some organic reactions, it can be either aqueous or gaseous, the latter, specially as a product. For that reason, you will need to make sure whether your reaction is organic or inorganic to correctly figure out the phase label.

Best regards!

Which of the following is a primary source for scientific information? O A. Doctoral theses OB. A handbook of scientific facts O C. Reviews of scientific studies D. Public opinion about a scientific issue​

Answers

D is the answer, Public op about a scientific issue

Why is a rotting apple a reaction in which energy is neither absorbed nor released?
A. The chemical energy in the reactants is almost equal to the chemical energy in the products.
B. The chemical energy in the reactants is much greater than the chemical energy in the products.
C. The chemical energy in the reactants is much less than the chemical energy in the products.
( don’t send links, I won’t click them)

Answers

I don’t know the answer but ik it is due to oxidation rooting apple is a reaction but it neither absorb or release energy

Which of the following is an ionization reaction?
a. H2SO4 (aq) + Ca(OH)2 (aq) → CaSO4 (s) + 2 H2O (l)
b. NH3 (aq) + H2O (l) ⇋ NH4+ (aq) + OH– (aq)
c. CH3COO– (aq) + H2O (l) ⇋ CH3COOH (aq) + OH– (aq)
d. None of these
e. H2O (l) + H2O (l) ⇋ H3O+ (aq) + OH– (aq

Answers

Answer:

d

Explanation:

Match each definition to the appropriate term.
Sum of the internal energy plus the product of the pressure and volume for a reaction
The extent of randomness in a system
The condition that a reaction takes place without outside help
Difference of the enthalpy (of a system) minus the product of the entropy and absolute temperature
Solution in which no more solute can be dissolved in the solvent

Answers

Answer:

Enthalpy, Entropy, Spontaneity, Gibbs free energy, saturated solution

Explanation:

Enthalpy is defined as the heat released or the heat absorbed during the process at a constant pressure which is equal to the Enthalpy shift. Enthalpy is also called as heat content and it is the sum total of internal energy and the product of the volume and pressure of a system.

Entropy is defined as the measure of randomness of a system or the disorder of the system.

Spontaneity is defined as the condition of being spontaneous. It is the condition where a reaction takes place without any help from outside.

Gibbs free energy is defined as the energy that is used to quantify the maximum work done in a thermodynamic system at constant temperature and pressure. It is the also known as the Gibbs energy or function.

Saturated solution is defined as the solution where the maximum amount of the dissolved solute is present in the solvent. In case of a saturated solution, the extra solute does not dissolve. In order words, it is a solution where no more solute can dissolved in solvent.

The sum of the internal energy plus the product of the pressure and volume for a reaction represents Enthalpy , Entropy is the extent of randomness in a system, Spontaneity is that condition that a reaction takes place without outside help, Gibb's free energy is the difference of the enthalpy (of a system) minus the product of the entropy and absolute temperature and Saturated solution in which no more solute can be dissolved in the solvent.

Which properties will define chemical reaction?

Thermodynamically chemical reactions will be define by considering the properties like entropy, enthalpy, free energy, internal energy, temperature and many more.

Enthalpy of the reaction tells about the total amount of heat released or absorbed during a chemical reaction, and it is calculated as sum of the internal energy plus the product of the pressure and volume for a reaction.Entropy of any reaction tells about the randomness and uncertainty present within the molecule or atoms.Spontaneity of any chemical reaction tells about the ease of completion of that reaction. Gibb's free energy is the total energy involved in that reaction and represented as difference of the enthalpy (of a system) minus the product of the entropy and absolute temperature.Saturated solutions are those solutions in which all solute get completely dissolved, no solute will remain undissolved.

Hence correct answers are Enthalpy , Entropy ,Spontaneity, Gibb's free energy and Saturated solutions.

To know more about saturated solutions, visit the below link:
https://brainly.com/question/4529762

Write a scientific explanation that answers the following question: Is matter conserved during a
chemical reaction in both closed and open systems?
Claim:
Evidence:
Reasoning:

Answers

Claim is : chemical reactions are smaller

Answer:

Matter is conserved during all chemical reactions because matter cannot be created or destroyed.

Explanation:

What is the name of the planet next to the label A?
Solar System
EARTH
SUN
A. Uranus
O ОО
B. Neptune
C. Jupiter
d
D. Saturn
Please help

Answers

Answer:

B. Neptune. Neptune is next to Uranus

A mixture of water and water vapor is present in a closed vessel at 20 degrees Celsius. the total pressure of the system is 755.0 mmHg. Partial pressure of water vapor at 20 degrees Celsius equals 17.5 mm Hg. What is the partial pressure of H2

Answers

Answer:

737.5 mmHg

Explanation:

Ptotal=PH2O+PH2

P is the pressure and since we have Ptotal and PH2O, we can solve for PH2

755=17.5+x

755-17.5=x

x=737.5

Why do we test for free chlorine in drinking water?

Answers

Answer:

The presence of free chlorine in drinking water is correlated with the absence of most disease-causing organisms, and thus is a measure of the potability of water

Calculate the pOH of this solution. pH = 1.90 pOH =

Answers

Answer:

12.1

Explanation:

Since the pH has been given, the pOH can be found by using the formula

pH + pOH = 14

pOH = 14 - pH

From the question we have

pOH = 14 - 1.9

We have the final answer as

12.1

Hope this helps you

Answer:

12.10

Explanation:

The change of energy from one form to another result in _____. Need help please

Answers

Answer:

The change of energy form one form to another result in chemical reaction!

Question 6
Simplify the following expression
-3 + 4(a - 3b + 2) - 514 - a + 3b)​

Answers

This expression simplified is 3a-9b-509
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