CAN SOMEONE PLEASE ANSWER THIS PAGE ILL GIVE YOU ALL MY POINTS

CAN SOMEONE PLEASE ANSWER THIS PAGE ILL GIVE YOU ALL MY POINTS

Answers

Answer 1

Answer: the equation for the reaction is NH4Cl (s) --> NH3 (g) + HCl (g)

equation for heat reaction:

ΔH25° = (ΔH25° NH3 + ΔH25° HCl) - ΔH25° NH4Cl)

question 2:

the 1st and 3rd reactions are better ontained through  refrence sources and the 2nd and 4th are the easiest and safest to measure in the laboratory. The 1st and rd reaction contains noxious gases this is because there is a (g) in both of the reactions. And the 2nd and 4th does NOT contain noxious gases so i assume its the safest to measure out in the lab  


Related Questions

would Nitrogen Dioxide be ionic or covalent

Answers

Explanation:

The nitrogen dioxide is a covalent compound where one nitrogen is the central atom which is bonded to two oxygen atoms, where one oxygen atom is bonded by a single bond and other oxygen atom by a double bond.

Answer: colavent

Explanation:

what are two consents in this experiment
The number of cricket chirps
The temperature of each container
The kind of containers used
The number of crickets in each container

Answers

Answer:

the number of crickets in each container

Explanation:

to participate in the experiment you will have to know the crickets in the container

iron filings react with sulphuric acid to produce hydrogen and iron(II) sulphate

Answers

Answer:

is this true and false? then its true

Explanation:

Answer:

Fe(s) + H2SO4 (aq) ---> FeSO4 (s) + H2 (g)

Explanation:

Do cycloalkanes easily take part in addition reactions?

Answers

Answer:

The reactions of the cycloalkanes are generally just the same as the alkanes, with the exception of the very small ones - particularly cyclopropane. ... In the absence of UV light, cyclopropane can undergo addition reactions in which the ring is broken

PLZ HELP ME WITH MY WORK​

Answers

Answer:

neutrons should be added with the protons


How many moles are there in 2.3 x 1024 atoms of
sulfur?

Answers

Explanation:

The steps given in the question are incorrect.

Step 1 should be convert atoms to moles (n). Step 2 should be convert moles (n) to mass (m).

Step 1

Use dimensional analysis to convert the number of atoms to moles.

1 mole atoms = 6.022 × 10²³ atoms

n(Ag) = 2.3 × 10²⁴ Ag atoms × (1 mol Ag/6.022 × 10²³ Ag atoms) = 3.8193 mol Ag

Step 2

Convert the moles of Ag to mass.

mass (m) = moles (n) × molar mass (M)

n(Ag) = 3.8193 mol Ag

M(Ag) = atomic weight on the periodic table in g/mol = 107.868 g Ag/mol Ag

m(Ag) = 3.8193 mol × 107.868 g/mol = 412 g Ag = 410 g Ag rounded to two significant figures

The mass of 2.3 × 10²⁴ Ag atoms is approximately 410 g.

Answer:

[tex]\boxed {\boxed {\sf 3.8 \ moles \ of \ sulfur}}[/tex]

Explanation:

We are asked to convert a number of atoms to moles.

We can convert atoms to moles using Avogadro's Number, which is 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this problem, the particles are atoms of sulfur. There are 6.022 ×10²³ atoms of sulfur in 1 mole of sulfur.

We use dimensional analysis to convert atoms to moles. This involves setting up ratios. Use Avogadro's Number and the underlined information to make a ratio.

[tex]\frac {6.022 \times 10^{23} \ atoms \ S}{1 \ mol \ S}[/tex]

We are converting 2.3 ×10²⁴ atoms of sulfur to moles, so we multiply by this value.

[tex]2.3 \times 10^{24} \ atoms \ S *\frac {6.022 \times 10^{23} \ atoms \ S}{1 \ mol \ S}[/tex]

Flip the ratio. It is equivalent, but it allows the units of atoms of sulfur to cancel.

[tex]2.3 \times 10^{24} \ atoms \ S *\frac {1 \ mol \ S}{6.022 \times 10^{23} \ atoms \ S}[/tex]

[tex]2.3 \times 10^{24} *\frac {1 \ mol \ S}{6.022 \times 10^{23} }[/tex]

[tex]\frac {2.3 \times 10^{24} }{6.022 \times 10^{23} } \ mol \ S[/tex]

[tex]3.819329127 \ mol \ S[/tex]

The original measurement of atoms (2.3 ×10²⁴) has 2 significant figures, so our answer must have the same. For the number we calculated that is the tenths place. The 1 in the hundredths place to the right (3.819329127) tells us to leave the 8 in the tenths place (3.819329127).

[tex]3.8 \ mol \ S[/tex]

2.3 ×10²⁴ atoms of sulfur is equal to approximately 3.8 moles of sulfur.

A piece of unknown metal with mass 68.6 g is heated to an initial temperature of 100 °C and dropped into 8.4 g of water (with an initial temperature of 20 °C) in a calorimeter. The final temperature of the system is 52.1°C. The specific heat of water is 4.184 J/g*⁰C. What is the specific heat of the metal?
0.171
0.343
1.717
3.433

Answers

Answer:

1.717

Explanation:

As the mass of the nucleus increases, what happens to the ratio of neutrons to protons in stable isotopes? A. The neutron:proton ratio decreases. B. The neutron:proton ratio increases. C. The neutron:proton ratio remains 1:1. D. The neutron:proton ratio remains 1.5:1.

Answers

Propeen is nute 18?.9

Which of the following results in a decrease in the entropy?
Heating ice
Increasing mass
Cooling a liquid
Dissolving salt in water

Answers

Answer:

cooling a liquid

Explanation:

Temperature is lowered and the energy of molecules, and therefore number of available configuration , is lowered

The thermal energy present in the system for the product formation is entropy. Cooling a liquid can decrease the entropy of the thermodynamic system. Thus, option C is correct.

What is entropy?

Entropy is the energy and the heat present in the reactant of the thermodynamic system that is associated with the randomness and disorder of the particle matter in the reaction system.

Entropy is dependent on factors like dissolution, temperature, randomness, kinetic energy, etc. The entropy increases with an increase in the dissolution and tempearture.

The process of cooling liquid lowers the temperature which in turn decreases the kinetic energy and randomness of the molecules and at last, the entropy decreases.

Therefore, the cooling of the liquid decreases the entropy.

Learn more about entropy here:

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For the reaction 2HNO3 + Mg(OH)2 + Mg(NO3)2 + 2H20, how many
grams of magnesium nitrate are produced from 3.54 mol of nitric
acid, HNO3?
O a. 220
O b. 263
O c. 1050
O d. 175

Answers

Answer:

B

Explanation:

What does the reducing agent do in a redox reaction? (A.P.E.X)

Answers

Answer:

The reducing agent donates electron to the oxidizing agent and gets oxidized itself

Explanation:

In an oxidation-reduction reaction, also known as REDOX reaction, one of the reactants is called OXIDIZING AGENT while the other is called REDUCING AGENT. The reducing agent is called so because it reduces another substance in the reaction.

It reduces another atom/ion by donating electrons to that atom, hence, getting oxidized itself in the process. For example, in the following reaction:

H2 + F2 → 2HF

Fluorine is getting oxidized from -2 to 0 by donating electrons to H and reducing it from +2 to 0.

Answer:

Reduces another atom

Explanation:

:)

Làm thế nào để tắt mỗi chất ra khỏi hỗn hợp gồm bột nhôm bột sắt và bột gỗ?

Answers

Answer:

Dùng nam chân hút đc bột sắt ra khỏi hỗn hợp

Bột gỗ và bột nhôm thì bột gỗ tan trong nước còn bột nhôm thì không

Explanation:

Nice !

A small gap in skit in railway track why​

Answers

Answer:

To reduce the bending of the railway

Explanation:

During summer(heat) metals tend to expand in size. The skits/gaps are present in the railway so that the metal could expand without causing bending of the railway track.

Can Some One Please Help Me

Answers

Answer:

12 g

Explanation:

From the question given above, the following data were:

Number of atoms = 6.02×10²³ atoms

Mass of ₆C¹² =?

From Avogadro's hypothesis,

1 mole of any substance contains 6.02×10²³ atoms. This implies that 1 mole of ₆C¹² also contains 6.02×10²³ atoms i.e

1 mole of ₆C¹² = 6.02×10²³ atoms

Recall

From the period,

1 mole of ₆C¹² = 12 g

Thus,

12 g of ₆C¹² = 6.02×10²³ atoms

Therefore, 12 g of ₆C¹² contains 6.02×10²³ atoms

A 240g hydrated sodium sulphide contains 162g of water of crystallisation. What is the correct molecular formula for this compound?
What is the answer and working

Answers

Answer:

Explanation:

First of all, 1 mol of Sodium Sulphide has molecular mass of

S = 32

Na2 = 2*23 = 46

The formula of NaS is actually Na2S. It's molecular mass = 78

How many grams of Na2S are present

Grams present = 240 - 162 = 78 which is exactly 1 mol.

The remainder is water.

The molecular mass of water = 2 + 16 = 18

162 grams of water = 162/18 = 9 mols of water.

So the correct formula is Na2S*9H20

Which of the following units are commonly used in chemistry? A Kelvin b ampere c fluid ounce d kilogram ​

Answers

Explanation:

your answer is Kelvin because it is the SI unit of temperature

to make 400 gram solution with a mass by a mass concentration of 6 % how much salt and water you need to mix​

Answers

Answer:

[tex]400 \div 6 \\ \\ [/tex]

why hydrogen and oxygen all around us dows not form water

Answers

Answer:together doesn't make water

Explanation:

together doesn't make water

what is bonding in chemistry

Answers

Explanation:

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds.

if you want please give me brainliest and sir

Answer:

Check Down

Explanation:

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bond.

Out of a box of 46 matches, 22 lit on the first strike. What percentage of the matches in the box did not light on the first strike?

Answers

Answer: 52.17%

Explanation:

Number of matches in the box = 46

Number of matches that lit on the first strike = 22

Number of matches that did not light on the first strike = 46 - 22 = 24

Therefore, the percentage of the matches in the box did not light on the first strike will be:

= (Number of matches that did not light on the first strike / Number of matches in the box) × 100

= 24/46 × 100

= 52.17%

Therefore, the percentage of the matches in the box that did not light on the first strike is 52.17%.

25.Which of the following reaction will not take place?

A. Zn+ FeSO4 → ZnSO4 + Fe
C. Fe + NiSO4 → FeSO4 + Ni

B. 2Al + 3MgSO4→ Al2(SO4)3 + 3Mg D.
Cu + 2AgNO3 → Cu(NO3)2 + 2Ag​

Answers

Answer:

B

Explanation:

because Mg is stronger than Al

What is the atomic number of the atom in the diagram above please ?

Answers

Answer:

5

Explanation:

The atomic number is the number of protons in an atom. Protons are the positively charged particles in the nucleus. The number of protons define the identity of an element. An element with 5 protons is Boron, no matter how many neutrons may be present.

The atomic number of the atom shown in the diagram is 5.

What is the atomic number?

The atomic number of an element refers to the number of protons in the nucleus of its atoms. It uniquely identifies an element and determines its chemical properties.

In the diagram, there are 5 proton numbers in the nucleus of the atom. In other words, this means that the atomic number of the atom is 5.

More on atomic numbers can be found here: https://brainly.com/question/14190064

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Which option explains why this amino acid can act
both an acid and a base?
(1 point)
It contains both an amino functional group and a carboxyl functional group. In a solution, the amino group can
increase acidity, while the carboxyl group can decrease acidity
It contains both an amino functional group and a methyl functional group. In a solution, the amino group can
increase acidity, while the methyl group can decrease acidity
It contains both an amino functional group and a carboxyl functional group. In a solution, the amino group can
decrease acidity, while the carboxyl group can increase acidity
It contains both an amino functional group and a methyl functional group. In a solution, the amino group can
decrease acidity, while the methyl group can increase acidity

Answers

The correct answer is: It contains both an amino functional group and a carboxyl functional group. In a solution, the amino group can

decrease acidity, while the carboxyl group can increase acidity.

The carboxyl functional group is acidic while the amine group is basic.

In an amino acid, there are two functional groups;

The amine groupThe carboxyl group

The carboxyl functional group is acidic because it contains a replaceable or  ionizable hydrogen ion. The amine group on the other hand is capable of accepting a proton hence it is basic.

Therefore, In a solution, the amine group can  decrease acidity, while the carboxyl group can increase acidity.

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3. Determine the pH value for calcium hydroxide, Ca(OH), with concentration of
0.05 mol dm3. [pH + pOH = 14).

Answers

Explanation:

Ca(OH) is a base

pOH = -Log[OH]

[OH] = 0.05

pOH = -Log(0.05)

pOH = 1.3

pH + pOH = 14

pH = 14 - pOH

pH = 14 - 2

pH = 12.7

Determine the type of alcohol corresponding to each given description or name. 3-ethyl-3-pentanol Choose... An alcohol with two other carbons attached to the carbon with the hydroxyl group Choose... An alcohol with three other carbons attached to the carbon with the hydroxyl group Choose... 1-pentanol Choose... 2-hexanol Choose... An alcohol with one other carbon attached to the carbon with the hydroxyl group Choose...

Answers

Answer:

An alcohol with three other carbons attached to the carbon with the hydroxyl group

An alcohol with two other carbons attached to the carbon with the hydroxyl group

Explanation:

If we look at 3-ethyl-3-pentanol, we will discover that the compound is a tertiary alcohol. That is, the carbon atom bearing the hydroxyl group is attached to three other carbon atoms as gown in image 1 attached.

For 2-hexanol, the carbon atom bearing the hydroxyl group is attached to two other carbon atoms hence the alcohol is a secondary alcohol. The compound is shown in image 2 attached.

Which statement best describes the destiny of an atoms nucleus?

Answers

Answer:

The answer would be: An atom’s nucleus occupies very little of the atom’s volume but contains most of its mass

Explanation:

The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom.

Almost all of the mass of an atom is located in the nucleus, with a very small contribution from the electron cloud.

Refer to https://en.wikipedia.org/wiki/Atomic_nucleus for further understanding

What is the density of ammonia (NH3) at 273 K and 1.00 atm?

A - 0.7601 g/L

B - 0.982 g/L

C - 1.23 g/L

D - 2.43 g/L

Answers

Answer:

0.7602 g/L

Explanation:

We'll begin by calculating the molar mass of NH₃. This can be obtained as follow:

Molar mass of NH₃ = 14.01 + (3×1.01)

= 14.01 + 3.03

= 17.04 g/mol

Finally, we shall determine the density of ammonia, NH₃. This can be obtained as follow:

Temperature (T) = 273 K

Pressure (P) = 1 atm

Molar mass of NH₃ (M) = 17.04 g/mol

Gas constant (R) = 0.0821 atm.L/Kmol

Density (D) =?

D = PM / RT

D = (1 × 17.04) / (0.0821 × 273)

D = 17.04 / 22.4133

D = 0.7602 g/L

Answer:

It is A

Explanation:

What amount of SeC16 is needed to produce 4.45 mol of chlorine gas in the
reaction Seclo +0 218) —SeO, +3Cl2te)?
2.85 mol
0.95 mol
5.70 mol
8.55 mol
1.49 mol

Answers

Answer:

1.48 moles of SeCl6 are needed

Explanation:

Based on the reaction:

SeCl6 + O2 → SeO2 + 3Cl2

1 mole of SeCl6 reacts producing 3 moles of Cl2.

To solve this question we need to use the conversion factor:

1mol SeCl6 = 3mol Cl2

As we want to produce 4.45 moles of Cl2, we need:

4.45 mol Cl2 * (1mol SeCl6 / 3mol Cl2) =

1.48 moles of SeCl6 are needed

Which is the best term to use when describing the energy of motion? chemical kinetic potential thermal

Answers

Answer:

Kinetic energy

Explanation:

Kinetic energy is the energy associated with an object's motion. It is mass and velocity dependent by a directly proportional relationship.

Potential energy is the energy associated with an object's position.

Thermal energy is the energy associated with heat addition or withdrawal.

Kinetic energy is the energy that a body possesses because of its movement, that is, it is the energy that arises when objects are in motion.

What is kinetic energy?

It is that energy that a body or system possesses due to its movement.

The amount of work done by all the forces acting on a body with a given mass, depends on the said mass and the speed of the body.

Therefore, we can conclude that kinetic energy is the energy produced by its movements that depends on its mass and speed.

Learn more about kinetic energy here: brainly.com/question/999862

PLZ HELP ME WITH MY WORK​

Answers

c. high density
pls mark me as the brainliest :)

Answer:High density

Explanation:

The metal doesn't remains gas at room tempreture, it doesn't have brittleness property and it is not poor conductor of electricity .But, it has high density .

Hope, it would be correct.

Other Questions
[tex]5.5=2\pi \sqrt{\frac{L}{9.8}[/tex] apakah tujuan kita mempelajari tentang Zaman air batu Parker & Stone, Inc., is looking at setting up a new manufacturing plant in South Park to produce garden tools. The company bought some land 5 years ago for $9,639,708 in anticipation of using it as a warehouse and distribution site, but the company has since decided to rent these facilities from a competitor instead. If the land were sold today, the company would net $3,650,288. An engineer was hired to study the land at a cost of $810,081, and her conclusion was that the land can support the new manufacturing facility. The company wants to build its new manufacturing plant on this land; the plant will cost $6,880,840 million to build, and the site requires $529,656 worth of grading before it is suitable for construction. What is the proper cash flow amount to use as the initial investment in fixed assets when evaluating this project? Find the sum of integers -72, 237, 84, 72, -184, -37 Elaboremos un texto para explicar por qu es importante la vigencia del derecho a la tierra y al territorio para los pueblos indgenas u originarios y para el pas en general, y propongamos algunas acciones a fin de promover este derecho. You are preparing to park your car and you notice that you are near a railroad crossing. You must not park Choose an answer: A. Within 35 feet of a railroad crossing.B. Within 40 feet of a railroad crossing.C. Within 50 feet of a railroad crossing. Helpppppp -4y=-20Graph each line that represents each linear equation A puddle of dark liquid under a car indicates a leak in the oil or transmission fluid. Another warning sign of car trouble is uneven wear on tire treads. If the outer edge of the tire tread wears out before the center, the tire is under-inflated. The most significant early warning signal, however, is less and less mileage per gallon. Lower fuel economy is caused by a variety of problems ranging from a clogged air filter to ignition or carburetor trouble. The sentence that best expresses the implied main idea is:_______.a. Several warning signs can indicate car problems.b. A puddle of dark liquid under a car is a sign that a car has an oil or transmission-fluid leak.c. The most significant warning signal of a car problem is getting lower mileage per gallon of gas.d. Various problems may cause a car's fuel economy to decrease. Let us go, through certain half-deserted streets, The muttering retreats Of restless nights in one-night cheap hotels And sawdust restaurants with oyster-shells: How is this excerpt an example of dramatic monologue How many grams of ammonia can be produced from reacting a 450 L sample of nitrogen gas at a temperature of 450 K and a pressure of 300 atm? please I need answer right now ppleasssseeD. -1/4+-2/3with explanation pleaseeee South World has a total debt of $10 million and an annual GDP of $5 million. It currently pays 4% interest on its debt every year. What percentage of annual GDP does interest on the debt represent Hey Help me out please, thanks! you could win the first price if complete the sentence using if clause PLEASE HELP!!!Which of the following trigonometric expressions is equivalent to the x-coordinate of the terminal point Test scores for a Statistics class have a mean of 78 with a standard deviation of 6. Suppose a student gets an 81 on that test. What is the z-score for that grade? There are five students standing in a line with their hats. Suddenly the wind picks up the hats and randomly assigns each hat to a student. What is the probability that no student will get his or her own hat Help help help !!!! A boat has a ladder that's ten feet long, and hangs off the side of the boat,with its last two feet submerged in water. If the ocean tide rises five feet,how much of the ladder will be underwater? please answer this