Which of the following molecules is nonpolar?
Ο Α. CO2
Ο Β. SO,
Ο Ο Ο Ο
O C. CO
D. NO

Answer:

*result with sodium hydroxide: white ppt of Zn(OH)2

*excess sodium hydroxide: Precipitate dissolves to form a COLOURLESS solution

*Result with Aqueous ammonia: White ppt of Zn(OH)2

*excess aqueous ammonia: Precipitate dissolves to form a COLOURLESS solution

Answer:

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Answer:

presipitayion

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Answer:

Olfactory indicators

Explanation:

The substance whose odour changes in an acidic of basic medium are called olfactory indicators. In an olfactory indicator , smell varies depending on whether it is mixed with an acidic or basic solution.

Answer:

B

Explanation:

equilibrium happens when two things are in complete balance and thermal is in reference to heat so two things are in thermal equilibrium once they have the same temperature.

The option which indicates that two objects are in thermal equilibrium is the objects that have the same temperature. Thus, the correct option for this question is B.

Thermal equilibrium may be defined as a state of a system in which all the parts of the system occupy the same temperature. Two or more objects are in thermal equilibrium if there is no net flow of thermal energy or heat between them when they are considerably connected by a path permeable to heat.

The mechanism of thermal equilibrium occurs when a cup of hot coffee is put on the table and after a short period of time, the temperature of the coffee is the same as the surrounding temperature. So, this represents an example of thermal equilibrium.

Therefore, the correct option for this question is B.

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Answer:

magnesium chlorides are solids with high melting and boiling points because of the large amount of heat which is needed to break the strong ionic attractions.

Explanation:

These magnesium ions have more than one charge (2+). These highly charged ions will attract other ions more strongly than ions with one charge, therefore more energy will be needed to overcome the electrostatic forces of attraction and so the melting points will be higher.

Answer:

different from the number of their neutrons

Explanation:

They each have one single proton (Z = 1), but differ in the number of their neutrons. Hydrogen has no neutron, deuterium has one, and tritium has two neutrons. ... Their nuclear symbols are therefore 1H, 2H, and 3H. The atoms of these isotopes have one electron to balance the charge of the one proton.

Answer:

1.92402 kilohertz

Explanation:

hope this helps

Answer:

• From wave equation :

[tex]{ \rm{v = f \lambda}}[/tex]

[tex]{ \rm{3.0 \times {10}^{8} = (1.89 \times {10}^{18}) \times \lambda}} \\ \\ { \rm{ \lambda = \frac{3.0 \times {10}^{8} }{1.89 \times {10}^{18} } }} \\ \\ { \boxed{ \rm{ \: \lambda = 1.587 \times {10}^{ - 10} \: }}}[/tex]

As per the details given, 48.6 g are present in 0.885 moles of manganese. The correct option is A.

To determine the gram contained in a given number of moles, use the element's molar mass. Manganese (Mn) has a molar mass of roughly 54.94 g/mol.

To calculate the grammes in 0.885 moles of manganese, use the following formula:

moles of Mn × molar mass of Mn = mass of Mn in grams

On calculating it:

0.885 moles × 54.94 g/mol = 48.60 g

Therefore, the mass of manganese present in 0.885 moles of manganese is 48.60 grams.

Thus, the correct answer is A. 48.6g.

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Answer:

K.E =1/2 Mass×(velocity)2

Explanation:

1/2mass=K.E/Velocity 2

1/2mass=105/(10m/s)2

1/2mass=105/100m/s

1/2mass=21/20m/s

mass=21/20m/s ×2

mass=21/10

mass=2.1 Kilogram (put the value)

Answer:

C is the correct option.

Explanation:

When water reaches 100°C it starts evaporating and the molecules of water turns to vapor.

Answer:

I assume that you mix the 25 mL alcohol with 45 mL water.

The answer depends on a big IF : IF the volumes are additive. Very often volumes of liquids are not additive

Total volume = 70 mL

isopropyl alcohol %(v/v) = 25mL/ 70 mL * 100 % = 35.7% v/v

The answer should have only 2 significant digits: 36%v/v

Explanation:

Hope it helps

The percent by volume  of a solution formed by mixing 25 ml of isopropanol with 45 ml of water is 35.71% which is rounded off to 36%.

Percent volume is defined as the concentration of a particular solute which is measured in terms of volume present in a solution. The volume of the solution is present in the denominator which indicates the total volume of all components .

It is expressed as,

percent volume= volume of solute/volume of solution×100

It is used for solutions which are made by mixing two components . It is one of the ways of expressing concentrations of mixture with a dimensionless quantity.

Percent volume of the given solution is calculated by substituting the given values in the formula like, 25/70×100=35.71%

Thus, the percent by volume concentration of the solution is 35.71%≈36%.

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Adhesion is the attraction of molecules of one kind for molecules of a different kind... water is adhesive because the water molecules are attracted to the straw and therefore adhere to it. Thus, adhesive forces are important for sustaining life. This is because of these forces, water can flow up from the roots to the tops of plants to feed the plant, allowing it to move against gravity through plant cells. Another example of why its important that water is adhesive is the movement of water to the tops of trees and the drainage of tears from tear ducts in the corners of your eyes. Or how water droplets stick to the end of the pine needles. These are all examples of adhesion.

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Answer:

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Explanation:

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Answer:

Ammonia and Hydrogen Chloride.

Explanation:

Assuming this is what you're referring to, Ammonia (NH3) and Hydrogen Chloride(NCI3). The concentrated ammonia (NH3) is placed on a pad in one end of a tube and hydrochloric acid (NCI3) on a pad at the other. Shortly after the gases will begin diffusing far enough to meet, a ring of solid ammonium chloride (NH4Cl) will be formed.

Explanation:

Multiply the given moles times the molar mass of neon, 20.180 g/mol (periodic table).

Answer:

Multiply the supplied moles by 20.180 g/mol, the molar mass of neon (periodic table).

Explanation:

Answer:

The change in energy for a chemical reaction has to do with the potential energy of the electrons. The change in energy for a nuclear reaction has to do with the potential energy of the nucleus. The change in energy for a nuclear change is many orders of magnitude larger than for a chemical change.

The statement that describes both nuclear and chemical changes occur is "potential energy."

Nuclear reactions include a change in the nucleus of an atom, which usually results in the production of a different element. Chemical reactions, on the other hand, require just electron rearrangement and no changes in nuclei.

A nuclear reaction is any reaction that causes the nucleus of an atom to change. An atom's nucleus is made up of protons and neutrons. It seems to reason that a nuclear reaction alters the amount of protons and/or neutrons in an atom.

Chemical changes occur when bonds between molecules or atoms are broken and/or formed to form a new material. In this case, the new substances' qualities differ from the old, the particles differ, and the number of particles can alter.

The change in energy for a nuclear change is many orders of magnitude greater than the change in energy for a chemical change.

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Answer:

atoms have no overall charge. this is because they contain equal numbers of positive protons and negative electrons

Answer:

There are 4 Hydrogen atoms in the compound NH42CO3

Explanation:

The "H4" is used to represent the amount of Hydrogen atoms in the compound itself, which is 4.

Answer:

A. orqnges and bananas

B. Water and lemon juice

C. Air ( mixture of oxygen and nitrigen)

D. stones in water

E. smoke ( soot suspended in air)

F. coca cola ( Carbon dioxide dissolved in water)

Answer:

ako po because I'm pilipino

Explanation:

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Answer:

1.0001 M

Explanation:

Molarity = Mass/(Volume x molar mass)

Molarity = 98.0 g/(1.00 L x 97.994 g/mol)

Molarity = 1.0001 M

the molarity of 98.0 g of phosphoric acid, H3PO4 in 1.00 L of solution is 1.0001 M

Molarity can be defined as the number of moles of solute available in a definite concentration and amount of the solution, other wise called as moles per liters of a solution.

Molality of a solution can be defined as the number of moles per solute can be present in a kilogram of the solvent,  which is moles per kilogram of a solvent.

Though the terms Molarity and Molality are quite similar but the sharp difference between them as it creates a huge difference while using this two form of calculation  for various calculations.

Molarity = Mass/(Volume x molar mass)

Here, Molarity = 98.0 g/(1.00 L x 97.994 g/mol)

Molarity = 1.0001 M

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Answer:

[tex]\huge\boxed{\sf 2.27\ atm = 1,725\ mm\ of\ Hg}[/tex]

Explanation:

We know that:

1 atm = 760 mm of Hg (Standardly)

Multiply both sides by 2.27

2.27 atm = 760 * 2.27 mm of Hg

2.27 atm = 1,725 mm of Hg

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

Answer:

Emission of Light

Explanation:

Chemiluminescence is the emission of light as the result of a chemical reaction, and not a property of a specific compound.

Dont know if you were asking for this but hope it helps

Answer:

El sistema Dry-Fit funciona transportando la humedad a la superficie de la prenda, facilitando su evaporación. Comúnmente se utilizan materiales como el poliéster o microfibras de materiales sintéticos, ya que no absorben líquidos.

Explanation:

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Answer:

It emits energy since to move from a higher energy level to a lower energy level or ground state, it must lose energy.

Answer:

Explanation:

The biggest change in the body caused by regular exercise is to muscle tissue. ... At the cellular level, exercise triggers the release of substances that dilate the blood vessels in the muscle, letting in more oxygen, says Prof Bradford. These are short-term effects, but deeper changes come with regular exercise.

Exercising causes changes in our body because we're working our muscles so there's more going on with us compared to when we're just laying down. We need more oxygen to go to our muscles so we breathe harder and more rapidly. Our heart also beats faster because it needs to pump more blood to the muscles that are being worked.

Answer:

The answer is B(the path water takes from Earth to the clouds and back again)

Answer:

Metabolism is the set of life-sustaining chemical reactions in organisms. The three main purposes of metabolism are: the conversion of the energy in food to energy available to run cellular processes

Explanation: