What is the density of object A (give 2 sig figs)?

Answer:

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Explanation:

This is ur answer.....

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Metal reactivity decreases on moving from left to right in the modern periodic table due to the decrease in atomic size and inability to lose valence electrons.

Metals have the tendency to lose electrons and form cations. In the modern periodic table, consisting of 7 horizontal periods and 18 vertical  groups, when we move left to right across a period, the size of atoms decreases and the nuclear pull also increases due to which the elements cannot readily lose electrons and show metallic property.

Hence, on moving from left to right in a period, metallic character decreases and non-metallic character increases.

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Based on the provided information, the number of grams of carbon should you end with is 5g.

If you start with 5 grams of carbon on the reactant side, the grams of carbon you should end with 5g based on the law of conservation of mass. The law of conservation of mass, also known as principle of mass conservation postulate that for any system closed to all transfers of matter and energy, the system mass must remain constant over time, as the mass of system cannot change, so quantity can neither be added nor be removed. Hence, the law states that mass is neither created nor destroyed in a chemical reaction. Hence, the grams of reactants that one starts with, one will end with the same amount. Chemicals recombine to give a different compound in the product, the mass is still always conserved.

Note: The question is incomplete. The complete question probably is: If you start with 5 grams of carbon on the reactant side, how many grams of carbon should you end with?

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The given statement is false - outside city limits, the minimum distance for parking cars from a warning cross indicating a railroad crossing is 50 meters (165 feet).

Within 100 feet of a railroad crossing, bridge, tunnel, or other potentially dangerous location.

To ensure the safety of drivers on the road, the relevant authorities have made a number of rules regarding parking cars and other vehicles.

The authorities have made regulations regarding car parking close to railroad crossing signs in consideration of public safety and potential conditions relating to traffic accidents.

Because trains follow a different route and are a different mode of transportation, sometimes they must cross over the sides of the road.

The maximum length for parking a car outside the city limits has been set at 50 meters in order to prevent accidents that might happen as a result of track failure or other technical issues.

The same limit for parking a car inside the city's boundaries, however, has been set to at least 10 meters, or roughly 33 feet, due to space restrictions.

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Answer: Distance : The length of the space between two points.

Speed:The rate at which someone or something moves or operates or is able to move or operate.

Velocity: Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time.

Accerelation: Acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities. The orientation of an object's acceleration is given by the orientation of the net force acting on that object.

Explanation: Hope it helps!

The pH of a 0.100 M Ba(OH)2 solution is decreased to 6.51 when 15.0 mL of 0.125 M HCl is added. The titration curve of the reaction is a decreasing graph, with the pH decreasing as the volume of the HCl added increases.

Volume of HCl Added (mL) | pH

--------------------------|-----

0.0                   | 12.32

2.5                   | 10.98

5.0                   | 9.81

7.5                   | 8.79

10.0                  | 7.94

12.5                  | 7.18

15.0 (endpoint)       | 6.51

The pH of a 0.100 M Ba(OH)2 solution is decreased to 6.51 when 15.0 mL of 0.125 M HCl is added. The titration curve of the reaction is a decreasing graph, with the pH decreasing as the volume of the HCl added increases.

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Answer:

Explanation:

Answer:

Sulfure 3

Oxygen 5

Explanation:

The S stands for Sulfure. And the stands for Oxygen. If you meant the name then its Trisulfur Pentoxide

hopefully that's what you meant.

The solubility of a compound in water is determined by the type of chemical bonds present in the compound and the polarity of the molecule. Thus option B is the correct answer.

Compounds that are polar and have hydrogen bonding capability are more likely to be soluble in water.

In this case, Propanol (CH3CH2CH2OH) has a polar -OH group, which makes it able to form hydrogen bonds with water molecules, and therefore it would be more soluble in water than the other two compounds.

The other two compounds, CH3CH2OH (Ethanol) and CH3OCH2CH3 (Dimethyl ether), also have polar groups, but propanol has the most polar -OH group which is why it would be the most soluble in water.

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Answer:

Lustrous is NOT a property of metal

In comparison to non-polar hydrocarbon dielectrics like gasoline and diesel fuel, methanol is a polar substance like water and has a relatively high conductivity (conductivities less than 1 x 10⁴ pS/m).

Therefore, the self dissociation into ions for methanol and ethanol will be less strong than in water. But even in pure ethanol and methanol solutions, these ions will still exist and conduct electricity, albeit at very low conductivities.

Water's electrical conductivity is a measure of how well it can carry a current of electricity. The amount of electrical current that can be conducted in water increases with the concentration of dissolved charged chemicals, also referred to as salts.

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Answer:

Animals, plants, fungi, bacteria, protists, etc.

Explanation:

Biotic means they are alive.

0Bh will be the hexadecimal value of AL (Aluminium)after these instructions execute

#D9DAD9 is the hex code for aluminum. (217, 218, 217) are the corresponding RGB values, indicating that it is made up of 33% red, 33% green, and 33% blue. Printers employ the CMYK color coding, which are C:1 M:0 Y:1 K:15. Aluminum has a brightness value of 85%, a saturation value of 0%, and a hue value of 120° on the HSV/HSB scale.Hexadecimal is the most practical number system to work with when dealing with long strings of numbers due to its compactness, aligned correspondence of 4 bits to 1 symbol, and freedom from the need to perform multiplication and addition when switching between bases (compare switching from binary to decimal and back).

complete question:What will be the hexadecimal value of AL after these instructions execute?

mov al, 0CFh

and al, 2Bh

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Answer: Force disadvantage and distance advantage

Explanation: When mechanical advantage is less than one the force of the strength decreases because input force is greater than output force.

The distance increases ie the object is moving over a long distance.

Example when fishing with a long fishing rod the force applied to move the fish from the water is greater than the weight of the fish itself. The advantage of using the long fishing pole is that the distance over which the fish travels is greatly increased.

Hope this helps. It took me about half an hour before I could get this answer from my various searches. The idea might not be clear but this was what I was able to understand.

Answer:

1. 208

2. 82

3. Pb

Explanation:

²¹²₈₄Po —> ⁴₂He + ᴬZX

1. Determination of mass number A of the new atom.

212 = 4 + A

Collect like terms

212 – 4 = A

208 = A

A = 208

Thus, the mass number is 208

2. Determination of the atomic number Z of the new atom.

84 = 2 + Z

Collect like terms

84 – 2 = Z

82 = Z

Z = 82

Thus, the atomic number is 82.

3. Determination of the symbol of the new atom.

ᴬZX => ²⁰⁸₈₂X

The atomic number of the new atom is 82. Comparing the atomic number of the new atom to those in the periodic table, the new atom is lead with symbol Pb.

Thus,

²⁰⁸₈₂X => ²⁰⁸₈₂Pb

Therefore, the symbol of the new atom is Pb.

Answer:

12 to 14

Explanation:

drain cleaners contain sodium hydroxide or potassium hydroxide which are strong bases . The pH value of sodium hydroxide and potassium hydroxide is 14 and 12 respectively on the pH scale. So, most drain cleaners have a pH of from 12 to 14, regardless of how much L there are.

Answer:

Explanation:

A proton has a relative mass of 1. A neutron has a relative mass of 1. An electron has a relative mass of 1/1840. (accept 0)

An atom of phosphorus, which has a proton mass number of 31 has 15 protons, 15 electrons, and 16 neutrons.

Atom- The fundamental units of matter are atoms. They have a single nucleus, which is surrounded by a small number of protons and electrons.

Element- A species of atom known as an element is one that cannot decompose further. They only contain one kind of atom with the same quantity of protons.

Role of Neutron-

Neutron's charge is neutral. The element's mass is made up of protons and neutrons.

The neutrons' main function in an atom's nucleus is to contribute to the nuclear glue or binding energy that binds the nucleus itself together. Remember that protons and neutrons make up an atomic nucleus.

Positively charged protons don't get along with one another.

Neutrons are added to the structure to make up for the so-called mass deficit in order to counteract the protons' attractive forces.

In order to keep the nucleus together, the nucleons—the protons and neutrons in a nucleus—lose a little bit of mass that is transformed into binding energy.

Proton has  relative mass of 1 while   neutron has  relative mass of 1. While that of an electron has  relative mass of 1/1840.In phosphorous there are 15 electrons , protons and 16 neutrons.Atoms of same type combine to form element.Neutrons contribute to mass of atom hence change in number will make atom unstable.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

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Answer:

what?

Explanation:

what the hell?

In 2.20 liters of 1.50 molar sodium-chloride aqueous solution, there are 3.30 moles of chloride ions.

Molarity is the number of moles of solute per liter of solution.

We have 2.20 L of a 1.50 M solution.

2.20 L × 1.50 mol NaCl/L = 3.30 mol NaCl

The molar ratio of NaCl to Cl⁻ is 1:1.

3.30 mol NaCl × 1 mol Cl⁻/1 mol NaCl = 3.30 mol Cl⁻

In 2.20 liters of 1.50 molar sodium-chloride aqueous solution, there are 3.30 moles of chloride ions.

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According to stoichiometry and STP conditions ,1785.90 liters of hydrogen is produced.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

In the given reaction as per stoichiometry, 149.84 g of As produces 6 g hydrogen , thus, 39.3 g of As will produce 39.3×6/149.84=1.573 g.

As per STP conditions, V=1.573/2×8.314×273/1=1785.90 liters.

Thus, 1785.90 liters of hydrogen is produced.

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At T=3195.53 Kelvin, decomposition of PoCl3 becomes spontaneous.

In chemistry, spontaneous processes is one that occurs without addition of external energy. Spontaneous process can occur quickly or slowly, because spontaneity is not related to the kinetics or reaction rate.

Spontaneous reaction happens in given set of conditions without interruptions whereas the nonspontaneous reaction occurs with the help of external agents like heat or energy.

Given, ∆H=572KJ and ∆S=0.179J/K

According to thermodynamical concept;

As, T=∆H/∆S,

=572/0.179

= 3195.53 Kelvin

We know, change in Gibbs free energy (∆G)=0 ; which shows that reaction is in equilibrium.

Above this temperature the reaction becomes spontaneous and moves in  forward direction.

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The three elements that are highly reactive belongs to alkali metals i.e., s-block elements that are lithium, sodium and potassium.

The elements that belongs to s block elements are hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). The nature of alkali metals is soft and shiny in appearance. They have low melting point and are highly reactive in nature and usually tarnish when exposed to air. Sodium (Na) is the most reactive element since it's valence electrons are not tightly held together in the atom. The three elements that are highly reactive are Lithium (Li), Sodium (Na), and potassium (K). The elements toward the bottom left corner of the periodic table are the metals that are the most active in the sense of being the most reactive

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Answer:

C. the force from collisions of gas particles

During glycolysis, each G3P produces two ATP, for a total of four ATP per glucose molecule.

The metabolic mechanism that transforms glucose to pyruvate is known as glycolysis. This free energy is utilized to create the high-energy molecules adenosine triphosphate and reduced nicotinamide adenine dinucleotide. Glycolysis is a series of 10 enzyme-catalyzed processes. The initial stage in the breakdown of glucose to extract energy for cellular metabolism is glycolysis. Glycolysis is divided into two phases: energy-requiring and energy-releasing. Glycolysis is the process of breaking down glucose to create energy. It generates two pyruvate molecules, ATP, NADH, and water. The process occurs in a cell's cytoplasm and does not require oxygen. It can be found in aerobic and anaerobic organisms.

Here,

Each G3P produces two ATP during glycolysis, for a total of four ATP per glucose molecule.

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Option - a is correct answer, H₂SO₄ is a molecular compound that produces H⁺ ions when dissolved in water.

Molecule-shaped inorganic substances are known as molecular compounds. Examples include common compounds like water (H₂O) and carbon dioxide (CO₂). When compared to ionic compounds like sodium chloride, these compounds are very different (NaCl).

Molecules that have a formula that reflects the number of atoms actually bound together in the molecule make up a molecular compound. The bonds between the atoms are joined to form a distinct shape, which is determined by the bond lengths and angles.

Acid produces proton when there is water present.

H₂SO₄ + H₂O → H₃O⁺ + HSO₄⁻

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Answer:

B changing states of matter (solid to liquid)

Answer:

Cu

Copper is a chemical element with the symbol Cu and atomic number 29.

...

7.1Element Forms.

Explanation:

Answer:

Hey mate.....

Explanation:

This is ur answer.....

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Electron geometry is trigonal bipyramidal. Molecular geometry is T-shaped for iodine trifluoride, IF3.

Trifluoroiodine, often known as iodine trifluoride, has the chemical formula IF3. It is an unstable interhalogen chemical molecule. It has a yellow solid appearance and easily breaks down at temperatures higher than -28°C. Because of IF3's fragility, it is mostly unknown and undiscussed in the scientific community.In light of all of the aforementioned information, this article provides you with a basic introduction to IF3, covering topics such as how to draw its Lewis structure, molecular geometry, or shape of IF3, electron geometry, bond angle, hybridization, polar or non-polar nature, and/or any formal charges present on IF3 atoms.

Complete question:6. What are the electron and molecular geometries, respectively, for iodine trifluoride, IF3?

A. Electron geometry is trigonal bipyramidal.Molecular geometry is T-shaped.

B. Electron geometry is octahedral.Molecular geometry is T-shaped.

C. Electron geometry is trigonal bipyramidal.Molecular geometry is trigonal planar.

D. Electron geometry is trigonal planar.Molecular geometry is trigonal bipyramidal.

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Answer:

The electron geometry of IF3 is trigonal bipyramidal. But the molecular shape of IF3 is T-shaped. The bond angles formed between each atom are close to 90 degrees.

Explanation:

1 mole of any substance contains 6.023 × 10²³ particles. Therefore, 48.184 particles represents 8.0 moles.

The term mole is defined as the amount of substance in a system which include as many elementary entities as there are atoms present in it. It is denoted by the symbol “mol”. The word mole is coming from the Latin word moles, which means “a mass”.

The mole is also defined as it contain exactly 6.023 × 10²³ elementary entities present in it. 1 mole is exactly equal to the 6.023 × 10²³ elementary entities.

1 mole =  6.023 × 10²³

8 mole = 8 × 6.023 × 10²³

= 48.184 particles

Thus, 1 mole of any substance contains 6.023 × 10²³ particles. Therefore, 48.184 particles represents 8.0 moles.

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Answer:

2K + 2H2O ---> 2KOH + H2

Explanation:

Answer:

2k+2H2O ➡️2KOH + H2.....