which is not a correct ion?
li2+
cl-
Al3
O2-

Answer:

Sr(OH)₂ will be the limiting reagent.

Explanation:

First of all, you should know the following balanced chemical equation:

2 H₂CO₃ + 2 Sr(OH)₂ → 4 H₂O + Sr₂(CO₃)₂

The balanced equation is based on the Law of Conservation of Mass, which says that matter cannot be created or destroyed. Therefore, the number of each type of atom on each side of a chemical equation must be the same.      

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

To determine the limiting reagent, it is possible to use the reaction stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction). By stoichiometry the following amounts in moles react:

Now, you know the following masses of the elements:

So the molar mass of strontium hydroxide is:

Sr(OH)₂= 87.62 g/mole + 2*(16 g/mole + 1 g/mole)= 121.62 g/mole

You apply the following rule of three, if 121.62 grams of hydroxide are present in 1 mole, 12.5 grams in how many moles are they?

[tex]moles of strontium hydroxide=\frac{12.5 grams*1 mole}{121.62 grams}[/tex]

moles of hydroxide= 0.103 moles

On the other hand, you have 150 ml of 3.5 M carbonic acid. Since molarity is the concentration of a solution expressed in the number of moles dissolved per liter of solution, you can apply the following rule of three: if in 1 L there are 3.5 moles of carbonic acid, in 0.150 L (being 1 L = 1000 mL, 0.150 L = 150 mL) how many moles of acid are there?

[tex]molesofcarbonicacid=\frac{0.150 L*3.5 moles}{1 L}[/tex]

moles of carbonic acid= 0.525 moles

Finally, to calculate the limiting reagent, you can use a simple rule of three as follows: if by stoichiometry 2 mole of strontium hydroxide reacts with , how much moles of carbonic acid will be needed if 0.103 moles of strontium hydroxide react?

[tex]molesofcarbonicacid=\frac{0.103 moles of strontium hydroxide*2 moles of carbonic acid}{2 moles of strontium hydroxide}[/tex]

moles of carbonic acid= 0.103 moles

But 0.525 moles are available. Since more moles are available than you need to react with 0.103 moles of strontium hydroxide, Sr(OH)₂ will be the limiting reagent.

Answer:

A. The atomic number

the anwer is B.The atomic mass because atoms may be similar atomic mass ,number of electron,proton,and neutron by the presence of isotope but no two atoms have the same atomic number

Answer:

D) Cyanidin indicator

Explanation:

Cyanidin indicator has to be used in order to get an emerald green color at a pH of 9.

Indicators are substances that change colour when they are added to acidic or alkaline solutions.

In nature, cyanidin is a reddish-purple (magenta) pigment. It is the major pigment in berries [4] and other red-coloured vegetables such as red sweet potato and purple corn. It appears as a blue-reddish or purple pigment in the plant.

Cyanidin indicator has to be used in order to get an emerald green colour at a pH of 9.

Learn more about indicators here:

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Answer: 44g

Explanation: The formular for finding Moles is ;

Moles =  Mass / Molar Mass or Formular Mass.

Base on this question; Moles = 10, Mass = 440g, and Formular Mass = ?

Making 'Formular Mass', subject of the formular; we thus have;

Formular mass = Mass / Moles = 440/ 10 = 44g

Answer:

gold

Explanation:

Answer:

Explanation:

a) This is to show that particles are in constant motion (and that matter is made of particles) with kinetic energy which enables particles of one matter to intermix with particles of another matter. this is known as diffusion. For example, the fragrance of a burning incense stick could be felt even at the farther end of the room because particles from the incense stick rise and intermix with the particles of air. T hey diffuse and spread all over the room.

b) Brownian motion is a constant zig-zag motion particles undergo. This can be noticed in a colloidal solution. particles of a colloidal solution remain active as they are charged with the same charge (all the particles of a certain solution carry the same charge). This causes each of them to repel from each other thus putting them into constant motion (kinetic energy). Thus, this too shows that particles are in constant motion (and that matter is made of particles).    

Answer:

Combined with Hydrogen

Explanation:

Answer:

The container will have a pressure of 8 atm when the temperature is 50 degrees Celsius

Explanation:

To calculate this temperature, we need a gas law that relates temperature and pressure.

This is the Gay Lussac’s law and we know from it that temperature and pressure are directly related

Thus;

P1/T1 = P2/T2

From the question;

P1 = 4 atm

T1 = 25 degrees celsius

P2 = 8 atm

T2 = ?

Substituting these values, we have;

4/25 = 8/T2

4T2 = 8 * 25

4T2 = 200

T2 = 200/4

T2 = 50 degrees Celsius

Answer:

Left.

Explanation:

A+B      -->      AB

reactants      product

Answer:

0.816

Explanation:

1 mole of NaCN is

Na = 23

C  =  12

N =   14

Total = 49 grams / mole (just add 23 + 12 + 14)

moles when only 10 grams of NaCN are used.

moles = grams/molar mass

grams = 10

molar mass = 49

moles = 10  /  49

moles = 0.204 moles

Volume in Liters

250 mL = 250mL/1000 mL / Liter = 0.25 Liters

Molarity

M = m/V

M = 0.204/0.25 = 0.816

Answer:

people as: it Is less expensive. easy to carry

Answer:

H₂O + Na → NaOH + H₂

Explanation:

Firstly, a skeleton equation does not reflect the relative amount of reactants and products. A skeleton reaction only identifies the reactant and product by their chemical formula but it does not quantify them. A skeleton chemical equation is simply described as an unbalanced equation.

The question asked for the correct skeleton reaction of water and sodium to produce sodium hydroxide and hydrogen.

Let us represent them with their chemical formula

Water → H₂O

Sodium → Na

Sodium hydroxide → NaOH

Hydrogen → H₂

The skeleton reaction will be  

H₂O + Na → NaOH + H₂

Answer:

The equation is an example of combination/synthesis.

Explanation:

A + B → AB

The definition of synthesis is the act of simpler compounds being combined together to make a more complex compound. Both A and B are being combined to each other to make AB. So, the given equation shows a synthesis reaction.

Answer:

The percentage yield is 80.36% (see calculations in attachment).

Explanation:

The theoretical  yield of the reaction is the amount of product that would result if all the  limiting reagent reacted. The theoretical yield is calculated using the balanced equation.

In practice, the actual yield, or the amount of  product actually obtained from a reaction, is almost always less than the theoretical  yield.

To determine how efficient this reaction is, we need to calculate the percent  yield, which describes the proportion of the actual yield to the theoretical yield. It is  calculated as follows:

[tex] %yield = actual yield ÷ theoretical yield × 100% [/tex]

First we need to make sure that the equation is properly balanced. In the question they provide the balanced equation.

Since water is in excess, we calculate the theoretical yield using PCl₃.

Answer:

1. by not avoiding air bubbles from being trapped in the burette or pipette when filling them

2. not cross-checking the burette if it's slanted or vertically clamped

3. forgetting to rinse the pipette or burette with the solution to be used

4. not considering to take readings from the bottom of the meniscus with the eye level

5. finally, adding more than three drops of indicators to the pipetted solution

Explanation:

1. because the air bubbles will be mistakenly considered as part of the amount of the solution taken instead of that actually used up, and a higher titre value would be obtained

2. because if it's slanted, the acid level will be titled to one side and wrong reading will be recorded

3. rinsing to avoid diluting the acid or base with water that wets the burette or pipette

4. to avoid error of parallax and helps you to obtain accurate readings

5. excess burette solution than would normally have been consumed would be used up to change the colour of the indicator

Titration has been defined as the neutralization reaction for the acid and base, resulting in the formation of salt and water. It has been used for the determination of strength of acid and base.

The general source of error in titration has been;

The titration error has generally being manual error, and can be easily corrected.

For more information about titration, refer to the link:

https://brainly.com/question/24704707

Answer:

b) 4m/s^2

Explanation:

F=ma

F=8N

m=2kg

a=?

a=F÷m

8/2=4

acceleration=4m/s²

Answer:

the answer to fill the blank is 5

Explanation:

i just did the lesson :)

Answer:

5

Explanation:

Answer: .5m

Explanation:

Answer: yes that is true

Explanation:

newtons first law does state that.

Answer:

1. An overall net force must be applied to an object before it can move.

2. Newton’s first law of motion is also known as the law of inertia.

3. Newton’s first law applies to an object whether it is moving or not.

Explanation:

Edge

Answer: The concentration of [tex]OH^-[/tex] ions in the solution is 0.0063 M

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pOH is calculated by taking negative logarithm of hydroxide ion concentration.

[tex]pOH=-\log [OH^-][/tex]

[tex]pH+pOH=14[/tex]

[tex]11.8+pOH=14[/tex]

[tex]pOH=2.2[/tex]

Putting in the values:

[tex]2.2=-\log[OH^-][/tex]

[tex][OH^-]=[/tex] 0.0063 M

Thus the concentration of [tex]OH^-[/tex] ions in the solution is 0.0063 M

Answer:

Characteristics outlined below

Explanation:

Anthropods, though they generally possess exoskeleton, segmented bodies and joint appendages, are divided into four (4) groups:

Answer:

Noble gases b/c its melts quicly that why enjoy

Answer: A. The Wright brothers figured out how to outfit the plane with wings that flapped, similar to birds' wings,

Explanation: A p e x

Answer:

A

Explanation:

A p e x

Answer:

Hey mate,

Here is your answer. Hope it helps you.

18 grams.

Explanation:

The mass of one mole of any atom/molecule is equal to its atomic molecular mass in grams.

The molecular formula of water is

H

2

O

The atomic mass of

H

= 1

The atomic mass of

O

= 16

In a sense, the formula means

H

+

H

+

O

So... 1 + 1 + 16 = 18

Therefore, the mass of one mole of water = 18 milliletres

Answer:One carbon atom forms a double bond with an oxygen atom and two single bonds with two hydrogen atoms

Explanation:

Answer:

58.33 g/mol

Explanation:

Answer:

Active Transport

Explanation:

As the name suggests, in active transport you need energy to move materials in and out. Similar to how if you want to be active you need energy, same goes with movements in our cells as well.

Answer:

1M

Explanation:

The molarity of a substance is defined as the number of moles of the substance divided by how many liters the solution is. NaOH has a molar mass of about 40 grams, meaning that 10 grams of it would be 0.25 moles. 0.25/0.25= a molarity of 1.

Hope this helps!

Answer:

Liquids, because they flow, can occupy whatever shape their container has, so they do not have a fixed shape. Because the particles in liquids are very close together (barely further apart than in solids) liquids do not easily compress, so their volume is fixed. hope that helps love!