How do you know if an element is a metal or nonmetal from looking at the periodic table

PLEASE HELP I WILL MARK YOU BRAINLIEST !!If you react 4.25 moles of FeCl2, how many moles of Cl2 did you also react?

Ksju [112]

Lol yeah that’s what I’m doing I just want you know I got a lot of you guys to go and you don’t get

7 0

3 years ago

Which information does the atomic mass of an element provide? The number of protons and neutrons in an atom B. the number of iso

Semmy [17]

The atomic mass of an element provides A. the number of protons and neutrons in an atom.

7 0

3 years ago

Microwave ovens emit microwave energy with a wavelength of 12.8 cm. What is the energy of exactly one photon of this microwave r

levacccp [35]

We are asked for the energy emitted by a photon using the wavelength given. In this case, we use the planck relation that correlates energy and wavelength using Planck's constant and speed of light as constant of proportionality. The formula is E = hc / w where h is equal to 6.626 x10-34 Js and c is equal to 3 x10 8 m/s. E then is equal to 1.55 x10-24 J

3 0

3 years ago

Read 2 more answers

Carbonic acid, H2CO3, has two acidic hydrogens. A solution containing an unknown concentration of carbonic acid is titrated with

stepan [7]

Answer:

1) Net ionic equation :

$2H^+(aq)+2OH^-(aq)\rightarrow 2H_2O(l)$

2) 0.765 M is the molarity of the carbonic acid solution.

Explanation:

1) In aqueous carbonic acid , carbonate ions and hydrogen ion is present.:

$H_2CO_3(aq)\rightarrow 2H^+(aq)+CO_3^{2-}(aq)$ ..[1]

In aqueous potassium hydroxide , potassium ions and hydroxide ion is present.:

$KOH(aq)\rightarrow K^+(aq)+OH^{-}(aq)$ ..[2]

In aqueous potassium carbonate , potassium ions and carbonate ion is present.:

$K_2CO_3(aq)\rightarrow 2K^+(aq)+CO_3^{2-}(aq)$ ..[3]

$H_2CO_3(aq)+2KOH(aq)\rightarrow K_2CO_3(aq)+2H_2O(l)$

From one:[1] ,[2] and [3]:

$2H^+(aq)+CO_3^{2-}(aq)+2K^+(aq)+2OH^{-}(aq)\rightarrow 2K^+(aq)+CO_3^{2-}(aq)+H_2O(l)$

Cancelling common ions on both sides to get net ionic equation :

$2H^+(aq)+2OH^-(aq)\rightarrow 2H_2O(l)$

2)

To calculate the concentration of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is $H_2CO_3$

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is KOH.

We are given:

$n_1=2\\M_1=?\\V_1=50.0 mL\\n_2=1\\M_2=3.840 M\\V_2=20.0 mL$

Putting values in above equation, we get:

$M_1=\frac{1\times 3.840 M\times 20.0 mL}{2\times 50.2 mL}=0.765 M$

0.765 M is the molarity of the carbonic acid solution.

6 0

3 years ago

13. why do sodium and chloride ions in the extracellular fluid and potassium ions in the intracellular fluid behave as though th

Whitepunk [10]

NaCl is the primary nonpenetrating solute of the ECF. Its ions carry a charge, making it difficult for them to freely pass through the phospholipid bilayer of the cell membrane. While some Na+ does leak into cells, Na+-K+-ATPases pump Na+ out at roughly the same rate, making this solute functionally impermeable

Osmolarity is a measure of the concentration of osmotically active particles in a solution. It is sometimes called a “colligative” property of the solution by chemists because it depends on the number of particles in the volume of the solution rather than the identity of the particles.

One mole of any substance has Avogadro’s number (6.02 × 1023) of particles.

Molarity (M) of a solution is an expression of concentration, with one mole of solute per liter of solution.

the molarity of a solution is not always the same as the solution’s osmolarity. This is because some solutes, such as ionic compounds like NaCl, dissociate into separate particles (e.g., Na+ and Cl−) when dissolved in water.

The formula for osmolarity is:

osmolarity = molarity * dissociation factor

The dissociation factor for an ideal solution of NaCl is 2, given that the compound is made up of 2 ions.

Solutes that enter a cell by any means are said to be “penetrating” solutes. Solutes that do not enter the cell are said to be “nonpenetrating” solutes.

NaCl is the primary nonpenetrating solute of the ECF. Its ions carry a charge, making it difficult for them to freely pass through the phospholipid bilayer of the cell membrane. While some Na+ does leak into cells, Na+-K+-ATPases pump Na+ out at roughly the same rate, making this solute functionally impermeable.

For more information on osmosis click on the link below:

brainly.com/question/11534932

#SPJ4

4 0

2 years ago