can someone help me please.

Answer:

d. 671.6 nm

Explanation:

It is possible to solve the wavelength of a radiation from its frequency -or vice versa- using:

λ = c / f

Where λ is wavelength,

c is speed of light, a constant (2.998x10⁸m/s)

And f is frequency: 4.464x10¹⁴s⁻¹

Replacing:

λ = 2.998x10⁸m/s / 4.464x10¹⁴s⁻¹

λ = 6.716x10⁻⁷m

As 1m = 1x10⁹nm:

6.716x10⁻⁷m * (1x10⁹nm / 1m) = 671.6nm

Right answer is:

Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water. Solutions of HF are colourless, acidic and highly corrosive. It is used to make most fluorine-containing compounds; examples include the commonly used pharmaceutical antidepressant medication fluoxetine (Prozac) and the material PTFE (Teflon).

Answer:

A

Explanation:

Answer:

B. One element and one compound

Explanation:

O2 is a diatomic element: "are pure elements that form molecules consisting of two atoms bonded together"

*there are 7 types of diatomic elements

and...

C8H12O6 is a compound

Chemical Compound can be described as  "a chemical substance composed of many identical molecules composed of atoms from more than one element held together by chemical bonds"

Answer:

The same number of molecules, 6.0 × 10²³ molecules.

Explanation:

The amount of any given gas that can be stored in a container depends on the temperature, pressure and volume of the container. It does not depend on the nature (or identity) of the gas.

So if a 10-liter flask contains 6.0 × 10²³ molecules of hydrogen gas, it will contain the same amount of molecules of any other gas when temperature and pressure remain constant.

Answer:

3

Explanation:

I think so, let me know if its wrong.

Answer:

physical

Explanation: water can change from solid to liquid to a gas

Answer:

3 times ....

group 2

Explanation:

Answer:

Semiconductor

Explanation:

Semiconductors conduct electricity as the temperatures increase.

Hope this helped.

Answer:

true

Explanation:

i'm not so sure

use the formula p1v1= p2v2

for 1

300×300=500×x

x=180ml

Answer:

Explanation:

__________________________________________________________

Mean = 14.2 or 14

Median = 14

Mode = 16

Range = 6

__________________________________________________________

Here are all the numbers from least to greatest order: 11, 12, 13, 13, 14, 14, 16, 16, 16, 17.

__________________________________________________________

Hope this helps! <3

__________________________________________________________

Answer: 40.3 L

Explanation:

To calculate the moles :

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

[tex]\text{Moles of} Sb_2O_3=\frac{175g}{291.5g/mol}=0.600moles[/tex]

[tex]Sb_2O_3+3C\rightarrow 2Sb+3CO[/tex]  

According to stoichiometry :

1 moles of [tex]Sb_2O_3[/tex] produces = 3 moles of [tex]CO[/tex]

Thus 0.600 moles of [tex]Sb_2O_3[/tex] will produce=[tex]\frac{3}{1}\times 0.600=1.80moles[/tex]  of [tex]CO[/tex]

Volume of [tex]CO=moles\times {\text {Molar volume}}=1.80moles\times 22.4L/mol=40.3L[/tex]

Thus 40.3 L of CO is produced.

The substance is not produced during the electrolysis of concentrated aqueous sodium chloride is D) Sodium chloride​

while an electric current is handed via concentrated sodium chloride answer, hydrogen gasoline bureaucracy at the negative electrode, chlorine gas bureaucracy at the fantastic electrode, and an answer of sodium hydroxide also form.

(a) when a concentrated solution of sodium chloride (brine) is electrolyzed, it gets decomposed. this is a decomposition reaction. the products of this reaction are sodium hydroxide, chlorine, and hydrogen.

Learn more about Sodium Chloride at https://brainly.com/question/24878544

#SPJ2

Answer:

4 elements

C carbon

H hydrogen

Na sodium

O oxygen

Explanation:

Answer:1

Explanation:

Answer:

If u use math why It will give u the answer like 3x3=9

Explanation:

answer:

a^2+b^2= (a+b)² -2ab

Answer:

13.4 mol Ar

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

534 g Ar

Step 2: Identify Conversions

Molar Mass of Ar - 39.95 g/mol

Step 3: Convert

[tex]534 \ g \ Ar(\frac{1 \ mol \ Ar}{39.95 \ g \ Ar} )[/tex] = 13.3667 mol Ar

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

13.3667 mol Ar ≈ 13.4 mol Ar

Answer:

The number of moles in 452 grams of Argon is 13.31 moles.

Explanation:

Answer:

NaNO3

Explanation:

NO3^-1 has a charge of minus 1.

Na^+1 has a charge of +1

When they combine, the charges are not noted. You get NaNO3

Sodium Nitrate

Answer:

im not sure man

Explanation:

Answer: 1, magnesium & mg

2, two energy shells

Explanation:

Answer:

i believe its d

Explanation:

Answer:

I checked and I too think its D

Answer:

105%

Explanation:

El porcentaje de rendimiento se define como la masa obtenida del producto (En este caso, en términos de H2CO3), dividida en la masa teórica que debe ser producida.

La masa real se obtiene con las moles del otro producto que fueron producidas (Que son las mismas moles producidas de H2CO3)

Y la masa teórica se obtiene a partir de las moles de reactivo adicionadas:

Masa teórica:

2.36g NaHCO3 * (1mol / 84g) = 0.0281 moles de NaHCO3

0.0281 moles de NaHCO3 * (1mol H2CO3 / 2 moles NaHCO3) =

0.014 moles de H2CO3 son producidas. La masa es:

0.014 moles de H2CO3 * (62g / mol) = 0.871g es la masa teórica

Masa real:

1.57g Na2CO3 * (1mol / 106g) = 0.014 moles de Na2CO3

0.0148 moles de Na2CO3 * (1mol H2CO3 / 1 moles Na2CO3) =

0.0148 moles de H2CO3 son producidas. La masa es:

0.0148 moles de H2CO3 * (62g / mol) = 0.918g es la masa real producida

Así, el porcentaje de rendimiento es:

0.918g / 0.871g * 100 =

105%

Answer:

Adding enough thermal energy to a substance can cause a change of state to occur. The change of state from a solid to a liquid is called melting. When energy is added to an ice cube, the ice particles speed up as energy is absorbed. When the particles move fast enough, the solid ice melts and becomes liquid water

Answer:

c and d

Explanation: