MULTIPLE CHOICE
This equation represents an unbalanced chemical reaction:
Nal + Cl2 → NaCl + 12
When the equation is balanced, which coefficient should be placed before NaCl?

Answer:

Common uses of oxygen include production of steel, plastics and textiles, brazing, welding and cutting of steels and other metals, rocket propellant, oxygen therapy, and life support systems in aircraft, submarines, spaceflight and diving.

Explanation:

Oxygen is used to degrade hydrocarbon compounds, which are broken apart by heating them. This is used to create combustion that usually liberates water and carbon dioxide, but can also produce the hydrocarbons acetylene, propylene and ethylene. Oxygen is used in sewage-treatment and water-purification plants.

Answer:

Tetranitrogen Nanobromide

Answer:

1)Carbonated water is saturated with carbon, hence it gives off carbon through bubbles.

2)Adding sugar to water until it no longer dissolves creates a saturated solution.

3)Continuing to dissolve salt in water until it will no longer dissolve creates a saturated solution.

An unsaturated tea and sugar solution would be one into which you could add more sugar and have the sugar still dissolve

Answer:

See explanation

Explanation:

1. Decomposition= when one compound or substance is separated into 2 elements.

2. Single displacement: b is switched with c

3. double displacement: when 2 reactants form 2 different products

Answer:

kilograms

Explanation:

hope this helps, pls mark brainliest :D

Answer:kilogram

Explanation:

I got the smarts

Answer:

B 2

Explanation:

I checked it and it’s right hope this helps!!

Answer:

Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy (energy of motion) or potential energy (stored energy of position). A moving car possesses mechanical energy due to its motion (kinetic energy).

Explanation:

Answer:

= 1.615 moles

Explanation:

I did it on a test and got it right

Answer:it says how to make an atom stable like ion if the atom is metal then it will lose the atom to be full outer shell and if it is non metal it will gain.

second thing there is also covalent bond which share electron with other atomto be full outer shell

hope this help!!

Answer:

Explanation:

Kinetic energy is the energy in motion. Cooling if liquid would cause decreased temperature and hence slow down the oscillation of the particles.

Likewise, increased heat reduces the force of attraction between said particles, which allowed for their free movement. So the cooling would have opposite effect.

Finally, the space between the particles would remain the same as it was originally, as their force of attraction is increased in the cooling process, they would take the form they are held in.

I hope this was helpful and concise?

The final speed of the  green ball : 8.5 m/s

Given

mass of Croquet ball = 0.5 kg

v₁= 10 m/s

v₁'= 1.5 m/s

Required

the final speed

Solution

The law of conservation of momentum

m₁v₁ + m₂v₂ = m₁v₁ '+ m₂v₂' (1=red croquet ball, 2=green croquet ball)

v₂=0 (at rest)

Input the value :

[tex]\tt 0.5\times 10+0.5\times 0=0.5\times 1.5+0.5\times v_2'\\\\5=0.75+0.5v_2\\\\4.25=0.5v_2\rightarrow v_2=8.5~m/s[/tex]

Answer:

is there a picture.....????

Answer: 0.0009 moles of octane were used up.

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]

Given mass of octane = 0.1 g

Molar mass of octane = 11.23 g/mol  

Putting in the values we get:

[tex]\text{Moles of octane}=\frac{0.1g}{114.23g/mol}=0.0009moles[/tex]

Thus 0.0009 moles of octane were used up.

Answer: Metal atoms lose the electron/ electrons in their highest energy level and become positively charged ions.

Answer:

Cations

Explanation:

Cations (positively-charged ions) and anions (negatively-charged ions) are formed when a metal loses electrons, and a nonmetal gains those electrons. The electrostatic attraction between the positives and negatives brings the particles together and creates an ionic compound, such as sodium chloride.

Key Terms:

➡An anion can be defined as an atom or molecule that is negatively charged. ➡A cation can be defined as an atom or molecule that is positively charged. ➡They have an opposite electrical charge, therefore they get attracted to each other.

Answer:

Amount of ice

Explanation:

When we talk about independent variable, we mean that variable in an experiment that is manipulated and its effect on the dependent variable is measured.

In this case, the amount of ice in each water sample determines the temperature of each sample. Hence the amount of ice is the independent variable.

Answer:

ice cubes added

Explanation:

Answer:

I DONT GET IT IETHER

Explanation:

DONT GET IT

Answer:

The state of matter is solid

Explanation:

Answer:

8 valence electrons

Explanation:

Neon is a noble gas, and all noble gases have 8 valence electrons. The same goes for its group; all elements in the last group of the periodic table have a full valence shell--8 electrons.

Answer:

1.25 M

Explanation:

The molarity is found dividing the moles of solute by the litres of solution.

2.50 mol ÷ 2 L = 1.25 M

The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. Therefore, the molarity of  a solution prepared by dissolving 2.50mol of KCl into 2.00 L of solution is 1.25 M.

Molarity can be calculated by dividing number of moles of solute by volume of solution in liter. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.

Mathematically,

Molarity= number of moles of solute/volume of solution in liter

number of moles of solute KCl= 2.50 mol

volume of solution in litre = 2.00 L

substituting all the given values in the above equation, we get

Molarity= 2.50 mol ÷ 2 L

Molarity =  1.25 M

Therefore, the molarity of  a solution prepared by dissolving 2.50mol of KCl into 2.00 L of solution is  1.25 M.

Learn more about Molarity, here:

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Answer:

Different

Explanation:

Surely, the longitude lines and latitude lines where you are different from the longitude lines and latitude lines where your friend is. This is evident from the fact that sun's position in the sky is different at same time of the date. Your are the equator, then your friend must be above equator in northern hemisphere or below in southern hemisphere.

Answer:

A. The smallest unit of matter.

Explanation:

Atoms make up everything and are the smallest unit of all units.

Answer:

ΔG = 80,278.67 J/mol

Explanation:

Given:

∆H = - 103.85KJ/mol

∆S = - 269.74KJ/mol

T= 298 K

The Gibbs energy change (ΔG) is calculated as follows:

ΔG = ΔH - TΔS

ΔG = (-103.85KJ/mol)-298K(- 269.74KJ/mol)

ΔG = (-103.85KJ/mol) - (-80,382.52 J/mol)

ΔG = 80,278.67 J/mol

10

subtract the atomic mass from the atomic number

Answer:

mass = 37.8 g

Explanation:

mass = mol × molar mass

mol = 0.2

molar mass = Zn(NO3)2

Zn = 65

N = 14

O = 16

substitute the values into Zn(NO3)2

Zn(NO3)2

= 65+2[ 14+3(16) ]

= 65 + 2(62)

= 65 + 124

= 189 g/mol

mass

= mol × molar mass

= 0.2 mol × 189 g/mol

= 37.8 g

Answer:

In chemistry, a precipitate is an insoluble solid that emerges from a liquid solution. The emergence of the insoluble solid from solution is called precipitation. Often the precipitate emerges as a suspension. Precipitates can form when two soluble salts react in solution to form one or more insoluble products.

Explanation: Hope this helps! :>

Answer:

sodium bicarbonate, potassium bicarbonate and ammonium bicarbonate are the most commonly used bases.

Answer:

Last Quarter also called Third Quarter.

Explanation: