What is the ratio of sodium ions to bromide ions in neutral sodium bromide?

Answers

Answer 1

Answer:

The reaction of sodium with bromide is sodium bromide. The balanced chemical equation is Na + Br → NaBr. In the reaction, only one mole of sodium is needed to react with one mole of bromine to produce one mole of sodium bromide.

Answer 2

Answer:

Answer:

A 1:1

Explanation:

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Which of the following statements holds true for a chemical change?A. In a chemical change, no new substance is formedB. In a chemical change, a substance changes its phaseC. In a chemical change, the molecular structure of a substance changesD. In a chemical change, one substance dissolves into another
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A chemical system that resists changes in pH and prevents large swings in the pH is called __________. a) A base b) An acid c) An anion d) A buffer

Why does an egg sink in fresh water but float in salt water??

Answers

If an object is less dense than the water around it, it will float. Because salt water is denser than freshwater, some things float more easily in the ocean—or extremely salty bodies of the water, such as the Dead Sea. You can make your own dense water by adding salt to tap water.

Consider the reaction: 2 H2O (g)-->2 H2 (g) + O2 (g). ΔH=483.6 Kj/mol. If 2 moles of H2O (g) are converted H2(g) and O2(g) against a pressure of 1 atm at 125 degrees Celcius what is ΔE of reaction?

Answers

Answer : The value of $\Delta E$ of the reaction is, 480.29 KJ.

Explanation :

Formula used :

$\Delta E=\Delta H-\Delta n_g* RT$

where,

$\Delta E$ = internal energy of the reaction = ?

$\Delta H$ = enthalpy of the reaction = 483.6 KJ/mole = 483600 J

$\Delta n_g$ = change in the moles of the reaction = Moles of product - Moles of reactant = 3 - 2 = 1 mole

R = gas constant = 8.314 J/mole.K

T = temperature = $125^oC=273+125=398K$

Now put all the given values in the above formula, we get:

$\Delta E=483600J-(1mole* 8.314J/mole.K* 398K)$

$\Delta E=480291.028J$

$\Delta E=480.29KJ$

Therefore, the value of $\Delta E$ of the reaction is, 480.29 KJ.

dE = dH - PdV

2 H2O(g) → 2 H2(g) + O2(g)

You can see that there are 2 moles of gas in the reactants and 3 moles of gas in the products.

1 moles of ideal gas occupies the same volume as 1 mole of any other ideal gas under the same conditions of temp and pressure.

Since it is done under constant temp and pressure that means the volume change will be equal to the volume of 1 mole of gas

2 moles reacts to form 3 moles

The gas equation is

PV = nRT
P = pressure
V = volume (unknown)
n = moles (1)
R = gas constant = 8.314 J K^-1 mol^-1
- the gas constant is different for different units of temp and pressure (see wikki link) in this case temp and pressure are constant, and we want to put the result in an equation that has Joules in it, so we select 8.314 JK^-1mol^-1)
T = temp in Kelvin (kelvin = deg C + 273.15
So T = 403.15 K

Now, you can see that PV is on one side of the equation, and we are looking to put PdV in our dE equation. So we can say

dE = dH -dnRT (because PV = nRT)

Also, since the gas constant is in the unit of Joules, we need to convert dH to Joules

dH = 483.6 kJ/mol = 483600 Joules/mol

dE = 483600 J/mol - (1.0 mol x 8.314 J mol^-1K-1 x 403.15 K)
dE = 483600 J/mol - 3351.77 J
dE = 480248.23 J/mol
dE = 480.2 kJ/mol

___wastes are solid, liquid, or gas wastes that are toxic, flammable, corrosive, reactive, or radioactive.a. solid
b. hazardous
c. domestic

Answers

Answer: Option (b) is the correct answer.

Explanation:

When a substance is used and thrown away which can lead to damage in the environment as it may [produce some toxic or hazardous gases is known as a hazardous waste.

These wastes can be solid, liquid or gaseous.

For example, batteries, kerosene, garden chemicals etc are all hazardous waste.

A domestic waste is a waste thrown by a household which may include paper, vegetable waste, cardboard, yard clippings etc.

Thus, we can conclude that hazardous wastes are solid, liquid, or gas wastes that are toxic, flammable, corrosive, reactive, or radioactive.

It's hazardous m8. :P

Matter is made up of very small particles called

Answers

Matter is made up of very small particles called Atom.

What is an Atom ?

An atom is the smallest unit of ordinary matter that forms a chemical element.

Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.

An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.

An atom is a particle of matter that uniquely defines a chemical element.

Therefore, Matter is made up of very small particles called Atom.

Learn more about atom here ;

brainly.com/question/1566330

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Matter is made up of very small particles called ''Atom'

An atom are the basic building blocks of ordinary matter. Atoms can join to form molecules, which in turn from most of the objects around you.

Atoms are composed of particles called protons, electrons, and neutrons.

Protons carry a positive electrical charge.
Electrons carry a negative electrical charge.
Neutrons carry no electrical charge at all.

Hope i helped! And i know you didn't ask for all that, but i put by the way. If you need anything else ask me.

You can measure length with the greatest precision using a tape measure marked in _____.A. meters
B. kilometers
C. millimeters
D. centimeters

Answers

Answer:

The answer is C

Explanation:

Precision generally means been accurate (and can be loosely interpreted to mean been exact). Length is averagely measured in meters. However, in order to get the actual length of a substance using a tape, millimeters give the most accurate length (of all the options) as it provides the length to the smallest details (of all the options provided). The illustration below shows the relationship between millimeters and the rest of the options.

while 1 kilometer = 1000 meters

1 meter = 100 centimeters

1 centimeter = 10 millimeters

From the relationship above, millimeters is clearly the most precise of all the options provided.

You can measure length wiht the greatest preciaion using a tape measure marked in milimeters.

Answer: C. milimeters.

Hich one of the following is radical?(1 Point)

a.NH4+

b. CuSO4

c. CH4

d. NH3

Answers

Answer:

NH4+

Explanation:

Radicals are molecules or atoms which contain unpaired electrons. the exponent +4 represents 4 electrons in the outer shell which are unpaired

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