Question 4
Which best describes a chemical reaction that follows the law of conservation of matter?
А
The reactants have the same mass as the products.
B
The reactants have the same density as the products.
С
The products conserve all physical properties of the reactants.
D
The products conserve all chemical properties of the reactants.

Answer:

since you have both the mass and density of the sample, the volume can be derived from both

volume of seawater = \(\frac{5.0}{1.025}\)

                                 = 4.88 ml (3 s.f.)

Answer:

94 g/mole

Explanation:

The following answer assumes M is molar mass (g/mole):

One mole of Cl is 35.45 grams.  Since 1 mole of MCl is 74.5 grams, one mole of M will be (74.5-35.45 = ) 39.05 grams/mole.  This just so happens to be the molar mass of potassium, K.  That would mean the compound could be KCl.

We learn from this that M has a single bond.  The oxide of M must take into account the fact that oxygen makes 2 bonds per atom.  That would mean that M ocxide would have the formula M2O.  There are two M's per O.  

M2O would have a molar mass of (2x39.05) + 16 = 94.1 g/mole

Answer:

Molecularity is the number of ions or molecules that take part in the rate determining step

Order of reaction is the number of molecules of reactant whose concentration changes during the chemical change

Answer:

it's volume also decrease

Carbon dioxide is a chemical compound made up of molecules that all have one carbon atom covalently double bonded to two oxygen.

Carbon dioxide is relaxed of one carbon atom covalently bonded to two oxygen atoms. It is a gas (at standard temperature and pressure) that is expired by animals and utilized by plants during photosynthesis. Carbon dioxide, CO2, is a chemical compound claim of two oxygen atoms and one carbon atom. Carbon dioxide is a one-carbon compound with the formula CO2 in which the carbon is nuts about to each oxygen atom by a double bond. A molecule of carbon dioxide (CO2) is made up of one carbon atom and two oxygen atoms. Carbon dioxide is the main greenhouse gas that helps to trap heat.

So we can conclude that Carbon dioxide is a molecule with the molecular formula CO2. The linear molecule comprises a carbon atom that is doubly bonded to two oxygen atoms.

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Based on the data provided, the total energy of the reaction is 1066 kJ and the reaction is endothermic

The total energy change of a reaction is the difference between the total bond energy of the reactants and the total bond energy of the products.

Bond energy of reactants = 2000 kJ

Bond energy products = 934 kJ

Total energy of reaction = (2000 - 934) kJ = 1066 kJ

The total energy of the reaction is 1066 kJ and the reaction is endothermic.

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Answer and Explanation:

The options aren't listed in your question, but here are some units that are regularly and normally used (in the classroom and in the outside world):

(The SI unit of distance and displacement is the meter. The SI unit of time is the second.)

Meters per Second (m/s)

kilometers per hour (km/hr)

kilometers per second (km/sec)

To find the average speed, you do distance divided by time.

To find the average velocity, you do the final position minus the initial position, divided by the final time minus the initial time.

#teamtrees #PAW (Plant And Water)

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If a drain cleaner solution is a strong electrolyte then drain cleaner is highly ionized. The correct option is C).

A strong electrolyte is a substance that completely dissociates into ions in a solution. This means that when a strong electrolyte such as a drain cleaner is dissolved in water, it forms a high concentration of ions in the solution. The high ion concentration makes the solution highly conductive of electricity.

In the case of a drain cleaner, the high concentration of ions allows it to react more effectively with clogs and blockages in drains. Therefore, option A and B can be ruled out as they do not accurately describe the behavior of a strong electrolyte.

Option D is also incorrect as a strong electrolyte is highly ionized, not slightly ionized. Option E is incorrect as one of the options must be true. This leaves us with option C, which correctly describes the behavior of a strong electrolyte. Therefore, the correct option is C.

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Answer:

How do the formulas differ for molecular and ionic compounds? The formula for a molecular compound represents the atoms that make up one molecule of a compound. The formula for an ionic compound represents one formula unit of the compound. ... Put two electron between atoms to form a chemical bond.

Explanation:

Answer:

C3H

Explanation:

Initially these primary suit particles have roughly the composition and each is actually made up of several thousand carbon Adams the empirical formula suggest cycle is highly unders and unsaturated made structural element

Answer:

C3H)n

Explanation:

Answer:

A

Explanation:

The book encountered friction which turned some of the energy into heat.

Answer:

the volume of 5.0 g CO2 is 2.6L

CO2 at tsp

Answer:

29

Explanation:

since protons are a constant and unique characteristic of an element it's considered as he atomic number of that element.

There are 0.017 mm volume  hydrogen are formed at 715 mm hg and 19.0 deg c if 12.8 g of al react

The relationship between an object's mass and volume seems to be straightforward. The object's mass rises directly proportionately to its volume.

The given reaction is:

2 Al + 6 HCl → 2 alcl3 + 3 h2

It can be seen that, 3 mol of hydrogen is formed during the reaction.

Number of moles of hydrogen = 3

Mass = 12.8 g

d = 715 mmHg

Volume of hydrogen can be calculated as:

Density = mass /volume

Volume = mass / density

Put the values of given data in above expression.

Volume = 12.8 g  / 715 mm hg

Volume = 0.017 mm

Thus, volume of the hydrogen will be 0.017 mm

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Answer: A certain element exists as three different isotopes. 24.1% of all the isotopes have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu. What is the average atomic mass of this element?

Explanation: A certain element exists as three different isotopes. 24.1% of all the isotopes have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu. What is the average atomic mass of this element? 74.92 amu. Use your periodic table to determine which element this is. As. An element exists

The average atomic mass of the element is 74.93 amu

Let the 1st isotope be A

Let the 2nd isotope be B

Let the 3rd isotope be C

From the question given above, the following data were obtained:

Abundance of A (A%) = 24.1%

Mass of A = 75.23 amu

Abundance of B (B%) = 48.7%

Mass of B = 74.61 amu

Abundance of C (C%) = 27.2%

Mass of C = 75.23 amu

The average atomic mass of the element can be obtained as follow:

= [(75.23 × 24.1)/100] + [(74.61 × 48.7)/100] + [(75.23 × 27.2)/100]

= 18.13043 + 36.33507 + 20.46256

Thus, the average atomic mass of the element is 74.93 amu

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Answer:

C. X and Y are both positive

Explanation:

If we look at the graph, when it is a positive particle, it lines (arrows move away) in this we know both are positive, and since they are not combining into the others Electrical Field.

Answer:

All can be charactoristics of a living thing

Explanation:

Answer:

Grow

Need energy

respond to stimuli

are made of cells

Explanation:

correct on edge 2022 :)

Answer:

Polar easterlies are dry, cold prevailing winds that blow from the east. They emanate from the polar highs, areas of high pressure around the North and South Poles. Polar easterlies flow to low-pressure areas in sub-polar regions. Westerlies. Westerlies are prevailing winds that blow from the west at midlatitudes.

Explanation:

I hope this helps

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

density = 5 g/cm³

volume = 20 cm³

We have

mass = 5 × 20 = 100

We have the final answer as

Hope this helps you

Answer:

A. can travel through empty space

Explanation:

it is said dat electro magnetic waves or radiation travels through the vacuum of space

Answer:

all of the above. Because, Y'know, electromagnetic radiation is like that.

Answer:

B, C and D

Explanation:

Answer:

first answer

Explanation:

atomic number of bromine is 35

\(1{s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{6} 3 {d}^{10} 4 {s}^{2} 4 {p}^{5} \)

Answer:

1s22s22p63s23p64s23d104p5

Explanation:

;)

Answer: Option (A) is the correct answer.

Explanation:

An atom who has seven valence electrons in its ground state will have the following electronic configuration in its sub shells as 2, 7.

Thus, there will be in total 9 electrons and it is known that fluorine has atomic number 9.

Whereas sodium has 2, 8, 1 electrons in its sub-shell.

Calcium has 2, 8, 8, 2 electrons in its sub-shell and oxygen has 2, 6 electrons in its sub-shell.

Thus, we can conclude that out of the given options, fluorine is the element whose atom in the ground state has seven valence electrons.

Answer:

True!

Explanation:

A spectrum is simply a chart or a graph that shows the intensity of light being emitted over a range of energies. Have you ever seen a spectrum before? Probably. Nature makes beautiful ones we call rainbows. Sunlight sent through raindrops is spread out to display its various colors (the different colors are just the way our eyes perceive radiation with slightly different energies).

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5.75 liters of 3% hydrogen peroxide solution are included by the company in the container.

A measurement used to determine a number's value out of 100 is the percentage.

Due to that,

Hydrogen peroxide solutions in various containers have concentrations of 35% and 3%.

Since the corporation wants an 8-liter container with a 12% hydrogen peroxide concentration.

Use the allegation and combination properties,

35 3 12

9 : 23

Total quantity equals 23x + 9x = 32x.

Since the business requests 8 liters,

Consequently, 32x = 8 x = 1/4.

The concentration of 3% hydrogen peroxide will be equal to = 23x = 23/4 = 5.75.

5.75 liters of 3% hydrogen peroxide solution are needed.

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Answer:

D.

Explanation:

Emerging infectious disease

Answer:

d

Explanation:

emerging infectious disease

The unidentified compound's empirical formula is C9.45H5.13O1 (rounded to the nearest whole number). The simplest whole number ratio of the atoms in a compound is the empirical formula.

We must ascertain the relative proportions of each element in the combination in order to get the empirical formula. the volume of CO2 generated: 13.4 g of CO2 are created per mass of C. mass of H = (mass of H2O created) (2 mol H2O / 1 mol H2) (1 g/mol) = 5.49 g 2 / 18.015 g/mol = 0.610 g. the compound's overall bulk 5.90 g, 13.4 g, 0.610 g, and 1.89 g are the mass of O, total mass, mass of C, and mass of H, respectively. figuring out the empirical formula Create moles out of the masses: 13.4 g divided by 12.011 g/mol yields 1.117 mol of carbon. 0.606 mol is equal to 0.610 g/1.008 g/mol, or moles of H. Omoles are calculated as 1.89 g / 15.999 g/mol, or 0.118 mol. the most basic ratio of entire numbers: moles of C, moles of H, and moles of O are equal to 1.117, 0.606, and 0.118 mol/moles, respectively. The abbreviation is: C9.45H5.13O1. Hence, C9.45H5.13O1 is the empirical formula for the unidentified molecule.

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