In fossil comparisons, it helps to know about similar:

Answer:

initially it will form precipitate and with excess of ammonia it will form soluble product.

Explanation:

The reaction of nickel with ammonia is:

With aqueous ammonia nickel precipitate out as green gelatinous Ni(OH)₂:

[light green][tex]Ni^{+2}(aq) + 2 OH^{-}(aq)--->2 Ni(OH)_{2}(s)[/tex] (green colored).

If we add further more of ammonia, it will dissolve to form blue solution as:

[tex]Ni(OH)_{2}(s) + 6NH_{3}(aq) <==> [Ni(NH_{3})_{6}]^{+2}(aq) + 2OH^{-}(aq)[/tex]

So initially it will form precipitate and with excess of ammonia it will form soluble product.

Answer:

The symbols on the right of the arrow in a chemical reaction is called the "products". The symbols to the left of the arrow is called the "reactants".

Final answer:

In a chemical reaction, the substances to the right of the arrow are known as the 'products.' They are the new compounds formed as a result of the reactants undergoing the chemical reaction.

Explanation:

In a chemical reaction, the substances that appear to the right of the arrow are called the products. These substances are the result of the reactants undergoing a chemical change during the reaction. For example, in the chemical equation:

Zn + S =ZnS

Zinc (Zn) and sulfur (S) are the reactants found on the left side of the arrow, and zinc sulfide (ZnS) is the product found on the right side. During the reaction, zinc and sulfur combine to form zinc sulfide. It is important to note that in reversible reactions, indicated by a double arrow, the terms 'reactant' and 'product' can change based on the direction of the reaction. Overall, the standard convention for writing chemical equations involves reactants on the left, an arrow indicating the direction, and products on the right.

Answer:

One single coordinate covalent bond and one double covalent bond between the oxygen atoms, not in the expected triangular but in 1 bond structure.

Explanation:

O³ is also called ozone, and has three atoms in each molecule which makes it an allotropic form of oxygen.

Compared to oxygen, ozone is much more chemically active.

⇒The structure of ozone has 3 oxygen atoms, but due to steric hindrance, they can't  form the expected triangular structure, with each O atom.

⇒Instead each Oxygen forms only 1 bond, with the remaining negative charge being spread throughout the molecule, with one single coordinate covalent bond and one double covalent bond.

⇒The two O-O that share the double covalent bond are nonpolar as there is no electronegativity between  atoms of the same element (they share the same number of electrons, so there is no difference).

⇒ However, the distribution of the electrons along the 3 oxygen atoms is uneven, because the central atom must share electrons with the two atoms at both sides. The outer atoms only share electrons with the central atom.

So we can say that the central atom is more deprived of electrons than the 2 other oxygen atoms.

In terms of geometry,the molecule is bent, which is the result of this sharing of electrons and thus results in a dipole force across the ozone molecule.  

Answer:

The answer to your question is Aluminum

Explanation:

We need to warm from 22°C to 85°C

a) 45 g of water                      

b) 200 g of aluminum             Cp = 0.905 J/cal°C

a) Water

Q = mCpΔT

Q = (45)(1)(85 - 22) = 45(63) = 2835 cal

b) Aluminum

Q = (200)(0.905)(85 - 22) = 114030 cal

Answer:

15.64m/s

Explanation:

This is a unit of speed which is the rate of change of distance with time

I am driving at 35mph: and I want to express as m/s

  mph means miles per hour

This suggests that I have to convert miles to m and hrs to secs:

for distance                    1.609km = 1mi

                                        1000m = 1km

for time:

                 1hr = 60minutes

                 1min = 60seconds

Using dimensional analysis:

      [tex]\frac{35miles}{1hour}[/tex] x  [tex]\frac{1.609km}{1miles}[/tex] x  [tex]\frac{1000m}{1km}[/tex] x  [tex]\frac{1hour}{60min}[/tex] x  [tex]\frac{1min}{60seconds}[/tex]

   = 15.64m/s

Answer:

The number of grams of CO that can react with 0.400 kg of [tex]Fe_2 O_3[/tex] is 210 g.

Explanation:

The balanced chemical equation is

[tex]$F e_{2} \boldsymbol{O}_{3}(s)+3 \boldsymbol{C} \boldsymbol{O}(\boldsymbol{g})>2 \boldsymbol{F e}(\boldsymbol{s})+3 \boldsymbol{C} \boldsymbol{O}_{2}(\boldsymbol{g})$[/tex]

[tex]$0.400 \mathrm{kg} \mathrm{Fe}_{2} \mathrm{O}_{3} \times \frac{1000 \mathrm{g} \mathrm{Fe}_{2} \mathrm{O}_{3}}{1 \mathrm{Kg} \mathrm{Fe}_{2} \mathrm{O}_{3}} \times \frac{1 \mathrm{mol} \mathrm{Fe}_{2} \mathrm{O}_{3}}{159.7 \mathrm{gFe}_{2} \mathrm{o}_{3}} \times \frac{3 \mathrm{molCO}}{1 \mathrm{molFe}_{2} \mathrm{o}_{3}} \times \frac{28 \mathrm{g} \mathrm{CO}}{1 \mathrm{mol} \mathrm{CO}}$[/tex]

=210g CO is the Answer

The number of grams of CO that can react with 0.400 kg of [tex]Fe_2 O_3[/tex] is 210 g.

The prone position in medical contexts involves a patient lying face-down and can aid in breathing and medical procedures, offering benefits like improved air intake for artificial respiration.

Prone position is when a person is lying face-down. In medical settings, patients might need to be in a prone position for reasons such as aiding in breathing or allowing for specific medical procedures.

One major advantage of the prone position is that it allows for better air intake into the lungs, which can be crucial in scenarios like artificial respiration.

Artificial respiration, such as in cases of drowning, can benefit from the prone position as it facilitates the removal of mucus and water from the airways.

Final answer:

A cylinder is a 3-dimensional geometric shape with two parallel circular bases and a curved surface. It has applications across disciplines, including biology and physics, where its volume calculation (V = A*h) is crucial, and its shape influences resistance in electric circuits and the properties of capacitors and sound.

Explanation:

The definition of a cylinder in mathematics refers to a 3-dimensional geometric shape with two parallel circular bases connected by a curved surface. This surface is perpendicular to the bases and extends the same distance from every point on one base to the corresponding point on the other base. Cylinders can be found in various applications, from everyday objects like pipes and cans to biological structures and fluid dynamics.

In biology, cylinders are significant structures for mobility in organisms. For example, stolons in plants and rhizomorphs in fungi have cylindrical shapes that allow them to spread and cover territory effectively. Similarly, in physics, the concept of a cylinder is used to understand resistance in electric circuits and fluid mechanics. The volume of a cylinder is calculated by multiplying its cross-sectional area A by its height (V = A*h), which is a crucial factor in determining its capacity or the amount of substance it can hold.

In addition, when discussing capacitors or sound in physics, a cylindrical shape is a fundamental part of the structure affecting their properties. These examples demonstrate the importance of understanding cylindrical geometry in both theoretical and practical applications.

Answer:

Mass states that mass is neither created nor destroyed in a chemical reaction or a physical transformation

Explanation:

Answer:

19. g/mL

Explanation:

77.0-50.0=27 mL

d=521g over 27mL or d=521g/27mL

=19.2962963 g/mL

turns into 19. g/mL

hoped this helped! (and that its right-_-)

Answer:

The answer to your question is: Cp = 0.14 J/g°C

Explanation:

Data

mass = 25 g

T1 = 25°C

T2 = 155°C

Q = 455 joules

Cp = ?

Formula

Q = mCpΔT

Clear Cp from the equation    Cp = Q /(mΔT)

Cp = 455 /((25(155-25))

Cp = 455 / (25(130))

Cp = 455 / 3250

Cp = 0.14 J/g°C

The specific heat capacity of the mercury is 0.14 J/gºC

To solve this question, we'll begin by calculating the change in the temperature of the mercury. This is illustrated below:

Initial temperature of water (T₁) = 25 °C

Final temperature of water (T₂) = 155 °C

ΔT = T₂ – T₁

ΔT = 155 – 25

Mass of mercury (M) = 25 g

Change in temperature of mercury (ΔT) = 130 °C

Heat absorbed (Q) = 455 J

455 = 25 × C × 130

455 = 3250 × C

Divide both side by 3250

[tex]C = \frac{455}{3250} \\\\[/tex]

Therefore, the specific heat capacity of the mercury is 0.14 J/gºC

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A car travels 66 kilometers in 3 hours 22 km/h is its speed. The speed of an object, also known as v in kinematics.

The speed of an object, also known as v in kinematics, is the size of the change in that object's position over a period of time or the size of the change in that object's position over a given period of time, making it a scalar quantity. The total amount of distance travelled by an object in a time interval is divided by the length of the interval to determine its average speed.

As the length of the time period approaches 0, the speed at that moment is the highest point of the average speed. Velocity and speed are not the same thing. The parameters of speed are time divided by distance. The metre every second (m/s), the SI measure of speed, is the most widely used unit measuring speed.

Speed = distance/time

Speed = 66 km / 3 h

Speed = 22 km/h

Therefore, 22 km/h is the speed.

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Answer:

1.654 g/cm3

Explanation:

density can be define as mess per unite volume of any object.

Formula

D=m/v

Given data:

Mass= 77 g

Volume= 46.55 cm3

Now we will put the values in formula:

D=77 g/ 46.55 cm3= 1.654 g/cm3

So the density of object is 1.654 g/cm3.

Answer:

378k

Explanation:

Answer:

c) volume

Explanation:

mL is a unit of volume

Answer:

Carbon dioxide is produced, and as a gas, it was not captured to measure its mass.

Explanation:

Answer:

Carbon dioxide is produced, and as a gas, it was not captured to measure its mass.

Explanation:

Answer:

Biotic components, or biotic factors, can be described as any living component that affects another organism or shapes the ecosystem. This includes both animals that consume other organisms within their ecosystem, and the organism that is being consumed

Explanation:

also you spelt it wrong

Answer:

30 The atomic number is the number of protons

Explanation:

Answer:

An uncharged  zinc atom have 30 protons.

Explanation:

Each chemical element is characterized by the number of protons in its nucleus, which is called the atomic number Z. But in the nucleus of each element it is also possible to find neutrons, the number of which can vary. The atomic mass (A) is obtained by adding the number of protons and neutrons of a given nucleus.

In this case, an atom of the element zinc has an atomic number of 30 and a mass number of 65. So, you can know that Z=30 and A=65.  Then, the number of protons is 30.  And knowing that the number of protons plus the number of neutrons is 65, it is possible to say that the number of neutrons is 35.

Finally, an uncharged  zinc atom have 30 protons.

Answer:

122.04g

Explanation:

Cs is Caesium

Mass of Sn, tin = 109g.

Solution

we must first find the number of moles of the Sn from the given mass:

       number of moles = [tex]\frac{mass}{molar mass}[/tex]

molar mass of Sn = 118.7g/mol

      number of moles =  [tex]\frac{109}{118.7}[/tex] = 0.918moles

Now since the number of moles of the Sn is the sameas that of Cs, we can find the mass of Cs that will equal that.

Mass of Cs = number of moles x molar mass of Cs = 0.918 x 132.9 = 122.04g

To find the mass of cesium with the same number of moles as a 109-gram sample of tin, we calculate the moles of tin and then use the molar mass of cesium to find that it would be approximately 125.766 grams.

The student's question is asking for the mass of cesium (Cs) in grams when it contains the same number of moles as a 109-gram sample of tin (Sn). To find the answer, we first calculate the number of moles in the 109-gram sample of tin using the molar mass of tin (118.7 g/mol), which gives us approximately 0.918 moles.

Since we are looking for the same amount of moles in cesium, and knowing that one mole of cesium has a mass of 137 grams according to the given information, the mass of cesium would be approximately 125.766 grams (0.918 moles × 137 g/mol = 125.766 g).

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Answer:

One can of cola contain 0.16 kcal of carbohydrates.

Explanation:

Given data:

mass of cola can = 40 g

kilocalories of carbohydrates = ?

Solution:

we know that there are 4 cal of carbohydrates per gram.

40 g × 4 cal/g = 160 cal

Now we will convert calories into kilocalories. There are 1000 calories in one kilocalories so,

160/1000 = 0.16 kcal

so, one can of cola contain 0.16 kcal of carbohydrates.

Final answer:

To calculate the kilocalories in a can of cola with 40 grams of carbohydrate, multiply the amount of carbohydrate by 4 kilocalories per gram. This results in 160 kilocalories.

Explanation:

The number of kilocalories in one can of cola can be calculated knowing that carbohydrates provide 4 kilocalories of energy per gram. Given that the cola has 40 grams of carbohydrate and no fat or protein, we can simply multiply the amount of carbohydrate by the energy it provides.

So, 40 grams of carbohydrate * 4 kilocalories/gram = 160 kilocalories.

This means that one can of cola, with its 40 grams of carbohydrates and no contribution from fat or protein to its energy content, provides a total of 160 kilocalories of energy.

Answer: Option (A) is the correct answer.

Explanation:

It is known that kinetic energy is the energy obtained by an object due to its motion.

And, when we increase the temperature of a substance then there will occur an increase in the kinetic energy of its molecules.

Also,      K.E = [tex]\frac{3}{2}kT[/tex]

So, kinetic energy is directly proportional to the temperature. As a result, on increasing the temperature more number of collisions will take place between the molecules.

Therefore, we can conclude that amount of kinetic energy in the substance’s particles changes its states of matter.

A substance changes its state of matter primarily due to changes in the amount of kinetic energy in its particles, often induced by temperature changes.

A change in a substance's state of matter is primarily due to the change in the amount of kinetic energy in the substance's particles, which is often triggered by changes in temperature (Option A). Kinetic energy is the energy a particle possesses due to its motion. An increase in kinetic energy (which could be due to an increase in temperature) typically causes the substance to go from a solid to a liquid (melting) or a liquid to a gas (evaporation). Conversely, a decrease in kinetic energy (for example during cooling) can cause a substance to go from a gas to a liquid (condensation) or a liquid to a solid (freezing).

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Answer: A. a battery is an example of a voltaic cell

Choice A is the correct option in this question.

Explanation:

When the Silver Nitrate and copper are put in a container then redox reactions takes place which is the reason behind production of charge in a voltaic cell.

In case of battery also the same reaction takes place but it in a greater magnitude Hence a battery can be said to be a combination of several voltaic cells or we can also say that a battery is a bigger voltaic cell that produces current in a much larger magnitude than a simple cell.

Answer:

a battery

Explanation:

Plato

Glucose falls under aldoses group of monosaccharides which are one of the carbohydrates.

Explanation:

Generally, a molecule formed by combination of carbon, hydrogen and oxygen are termed as carbohydrates. The smallest of the saccharides are mono and disaccharides. The saccharides can contain an aldehyde or a ketone group in their structural formula.

The molecular formula of glucose is C6H12O6. It falls under monosaccharide as the molecular formula of monosaccharides are (CH2nO)n where the n will be 3,5 or 6. So the molecular formula of glucose exactly matches with the molecular formula of monosaccharide family.  

Also, it is known that glucose contains an aldehyde so it can be termed as aldose for being a carbohydrate in monosaccharide family containing aldehyde group.

Answer:

Glucose is nothing but a type of carbohydrate molecule which is also called as monosaccharides.

Explanation:

They are the smallest unit or simplest part of Carbohydrates which accumulates and join together to make bigger molecules of carbohydrates, Since these are made up of carbon, hydrogen, and oxygen.

These three elements mix together in given parts to make this smallest part of Carbohydrates or sugar. The Other bigger carbohydrates that are formed with these three elements are disaccharides or sucrose.

Answer:

Chemicals can affect our lives positively and negatively.

Explanation:

Positively: can help cleaning be easier, can keep bugs from eating plants, etc.

Negative: They can burn you if it is dangerous and your skin is exposed, can be hazardous to your health.

Answer:

Explanation:

Chemicals can affect lives positively and negatively.

Positively: The chemicals are the source of food for building up body and maintaing energy in it.

The chemicals can be in the form of insecticide or pesticide which kill pests, and disease causing insects.

Negatively: The chemicals are in the form of posionous gases like carbon dioxide, sulphur dioxide and others can be responsible for respiratory problems and even death.

Answer:

The correct option is OA.

C2H4O2 + NaHCO3 - NaC2H302 + H2O + CO2

Explanation:

To solve this you have to check the number of elements in both sides of the equation.

Answer:

Choice A: [tex]\rm 1\; C_2H_4 O_2 + 1\;NaHCO_3 \to 1\;NaC_2H_3O_2 + 1\;H_2O + 1\;CO_2[/tex].

Explanation:

Indeed it is possible to balance this equation by the conservation of atoms in a chemical reaction. However, knowing what's actually going on in this process will likely make this problem easier to solve.

Vinegar contains acetic acid [tex]\rm C_2H_4 O_2[/tex]. Acetic acid is a monoprotic acid. In other words, each [tex]\rm C_2H_4 O_2[/tex] can dissociate to produce up to one hydrogen ion [tex]\rm H^{+}[/tex]. That is:

[tex]\rm C_2H_4 O_2 \rightleftharpoons {C_2H_3 O_2}^{-} + H^{+}[/tex].

Baking soda is a common name for sodium bicarbonate [tex]\rm NaHCO_3[/tex]. Each formula unit of [tex]\rm NaHCO_3[/tex] contains one bicarbonate ion: [tex]\rm {HCO_3}^{-}[/tex]. Each bicarbonate ion will consume one hydrogen ion to produce water and carbon dioxide:

[tex]\rm {HCO_3}^{-} + H^{+} \to H_2O + CO_2[/tex].

For this chemical equation to balance, the number of hydrogen ions that [tex]\rm C_2H_4 O_2[/tex] supplies shall be the same as the number of these ions that [tex]\rm NaHCO_3[/tex] consumes. Each unit of [tex]\rm C_2H_4 O_2[/tex] supplies one unit of hydrogen ions while each unit of [tex]\rm NaHCO_3[/tex] consumes one unit of hydrogen ions. Reacting the two at a one-to-one ratio will make sure that this reaction neither run short of hydrogen ions or produce more hydrogen ions than it need.

Hence the coefficient in front of [tex]\rm C_2H_4 O_2[/tex] and [tex]\rm NaHCO_3[/tex] shall be the same. Let their coefficients be one.

[tex]\rm 1\; C_2H_4 O_2 + 1\;NaHCO_3 \to ?\;NaC_2H_3O_2 + ?\;H_2O + ?\;CO_2[/tex].

Now, balance this equation with reference to the number of atoms:

[tex]\rm 1\; C_2H_4 O_2 + 1\;NaHCO_3 \to 1\;NaC_2H_3O_2 + 1\;H_2O + 1\;CO_2[/tex].

Answer:

Explanation:

D. 2 Fe's, 3 O's

An atom is the smallest indivisible particle of a substance. Most notations of elements in actual sense depicts the combining atoms.

In Fe₂O₃, the subscript gives the idea of the number of combining atoms and their combining ratios. Here, weh have 2 atoms of Fe and 3 atoms of Oxygen.

Activated carbon filters use chemical means to seperate impurities from air:

Chemical reactions occurs when compounds are formed. Activated carbon filters are made up of activated carbons in which impurities have been removed and the pores of the carbon structure have become widened. This leaves the carbon with much surface area for chemical reaction to occur between impurities and the carbon in form of chemical adsorption. One important thing to note is that, in chemical change, it is difficult to resolve the reactants after the product is formed. In physical change, simple seperation techniques are used to seperate the reactants out.

Characteristics of a solid is that they have a "definite mass, volume and shape." Also who's molecules are closely packed together barely moving. Any object could be a example of a solid as long as it has mass, volume, and shape.

Hope this helps.

Answer:

mass of CO2 = 88 g

Explanation:

It is stated in question that 18.7 g of oxygen remained unreacted which means that carbon is limiting reactant. Thus the amount of carbon dioxide produced depend upon the amount of carbon.

Given data:

mass of carbon = 24 g

total mass of oxygen 82.7 g

mass of unreacted oxygen = 18.7 g

mass of carbon dioxide = ?

Solution:

First of we will calculate the moles of carbon.

number of moles of carbon = mass of carbon / atomic weight

number of moles of carbon = 24 g/ 12 g/mol = 2 mol

Chemical equation:

C + O2 → CO2

now we compare the number of moles of carbon and carbon dioxide,

  C   :  CO2

  1    :    1

 2    :    2

Now we will calculate the mass of carbon dioxide from moles.

number of moles of CO2 = mass of CO2 / molar mass of CO2

2 mol × 44 g/mol = mass

mass of CO2 = 88 g

Answer:

The answer to your question is: Letter D.

Explanation:

To have a balanced reaction, the number of elements in the reactants, must be equal to the number of elements in the products.

So, count the number of elements in each side.

                                                __Al + __O2 → __Al2O3

                      reactants                elements         products

                            1                              Al                      2

                            2                             O2                     3

It's unbalanced

Write a coefficient 4 in Al       4 Al +   3O2 →   2Al2O3

                               3 in O2

                              2 in Al2O3

And count again the number of elements

                        reactants                elements         products

                              4                              Al                      4

                              6                             O2                     6

Now, the reaction is balanced

The balanced equation for the formation of aluminum oxide from aluminum and oxygen is 4Al + 3O2 → 2Al2O3, where the ratio of Al to O2 to Al2O3 is 4:3:2. The correct option that reflects these coefficients is (D).

The coefficients that would balance the chemical equation for the formation of aluminum oxide (Al2O3) from aluminum (Al) and oxygen (O2) are found by ensuring that the number of atoms of each element is the same on both sides of the equation. The balanced chemical equation will have the following form:

4Al + 3O2 → 2Al2O3

To balance the equation, we assign coefficients to make sure that the number of aluminum atoms and oxygen atoms are the same on both sides. After placing the coefficients, we confirm that for aluminum, 4 Al atoms on the reactants side balance with 4 Al atoms as part of the 2 units of Al2O3 on the products side. For oxygen, 3 O2 molecules on the reactants side provide 6 O atoms, which balance with the 6 O atoms in the 2 units of Al2O3 on the products side. Therefore, the correct option is (D).

Answer:

The energy of an electron in many–electron atom is determined by both principal quantum number (n) and azimuthal quantum number (l)