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Answer:

Una onda es una perturbación que se propaga en el espacio, transportando energía pero no materia.

Explanation:

Answer:

i hope this helps

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Answer:

2.53%

Explanation:

mass percent = (mass of solute/mass of solution)×100%

mass percent = [6.5 g/(6.5 + 250) g]×100% = 2.53%

Answer:

[tex]r_{He}=169.7m/s[/tex]

Explanation:

Hello there!

In this case, since this problem can be understood via the Graham's law, which states that states that the rate of diffusion or of effusion of a gas is inversely proportional to the square root of its molecular weight, which can be extrapolated to the rate, we have:

[tex]\frac{r_{O_2}}{r_{He}} =\sqrt{\frac{M_{He}}{M_{O_2}} }[/tex]

Thus, since the molar mass of helium is 4.0 g/mol and that of oxygen is 16.0 g/mol, we solve for the average velocity of helium as shown below:

[tex]r_{He}=r_{O_2}\sqrt{\frac{M_{He}}{M_{O_2}} }\\\\r_{He}=480m/s\sqrt{\frac{4.0g/mol}{32.0g/mol} }\\\\r_{He}=169.7m/s[/tex]

Regards!

Answer:

b

Explanation:

Gucci ghhvhjhsgjjn hvh

Answer:

B

Explanation:

Q.1-

Given,

mass - 10grams

volume - 24 cm³

density = mass/volume

density = 10/24

density = 0.416 g/cm³

Q.2-

Given,

mass - 700grams

volume - 1100cm³

density = mass/volume

density = 700/1100

density = 0.6363 g/cm³

Answer:

How do the water molecules closest to the burner compare to the water molecules closest to the surface of the liquid? ... They are closer together and moving slower than those at the surface. They are more spread out and moving faster than those at the surface. The diagram shows the sun's interior.

Explanation:

Answer:

it's c if u don't want to read all that

Explanation:

Answer: D

Explanation:

2.3x10-11

Answer:

D. 2.3 x 10^-11

Explanation:

Look at the image below

Answer:

NH3(aq) and HCl(aq) are the reactants, while NH4Cl(aq) is the product.

Explanation:

The hydrogen atom from the HCl molecule joins the other three in NH3 creating a four hydrogen molecule,  NH4Cl.

Answer:

                                        N2 + 3H2 → 2NH3

Explanation:

Answer:

Striped should be the answer

Answer: +7

Explanation: Sum of all the oxidation numbers in a polyatomic ion is equal to the charge on the ion. Thus, the total charge on the polyatomic anion is −1. Thus, the oxidation number of Mn in MnO−4 is +7.

Answer:

32

Explanation:

Answer:

Protein

Explanation:

Which builds muscles

Answer:

50mL of the 0.1M acid are needed to neutralize the solution

Explanation:

To solve this question we have to calculate the moles of OH- present in the basic solution. Based on the reaction:

2OH- + H2CO3 → 2H2O + CO3²⁻

we can find the moles of carbonic acid (And its volume) required for the complete neutralization as follows:

Moles OH-:

pH = -log [H+]

10^-pH = [H+]

[H+] = 1x10⁻⁸M

As:

[OH-] = Kw / [H+]

[OH-] = 1x10⁻¹⁴ / 1x10⁻⁸

[OH⁻] = 1x10⁻⁶M

The moles in 10000L are:

10000L * (1x10⁻⁶moles OH- / L) = 0.01 moles OH-

Moles H₂CO₃ required:

0.01 moles OH- * (1mol H₂CO₃ / 2mol OH⁻) = 0.005 moles H₂CO₃

Volume:

0.005 moles H₂CO₃ * (1L / 0.1moles) = 0.05L =

Answer:

T= -99 °C.

Explanation:

Hello there!

In this case, according to the given description of the problem, it is possible for us to analyze this problem via the ideal gas equation:

[tex]PV=nRT[/tex]

However, we first calculate the moles in 3.00 grams of nitrogen gas (28.01 g/mol):

[tex]n=3.00g*\frac{1mol}{28.01g}=0.107mol[/tex]

Next, we solve for the temperature as shown below:

[tex]T=\frac{PV}{Rn}[/tex]

Next, we convert the given pressure and volume to atm and L to obtain:

[tex]T=\frac{(206.58atm/101.325)*750.0L/1000}{0.08206\frac{atm*L}{mol*K}*0.107mol}\\\\T=174.15K-273.15\\\\T=-99\°C[/tex]

Regards!

Answer:

D

Explanation:

Before it can be used in a reactor for electricity generation, however, it must undergo a series of processes to produce a useable fuel. For most of the world's reactors, the next step in making the fuel is to convert the uranium oxide into a gas, uranium hexafluoride (UF6), which enables it to be enriched.

Unstable U-235 must be enriched with 5% U-238 to stabilize it.​ Hence, option D is correct.

Radioactivity is the phenomenon of the spontaneous disintegration of unstable atomic nuclei into atomic nuclei to form more energetically stable atomic nuclei.

Before uranium can be used in a reactor for electricity generation, however, it must undergo a series of processes to produce a useable fuel.

For most of the world's reactors, the next step in making the fuel is to convert the uranium oxide into a gas, uranium hexafluoride (UF6), which enables it to be enriched.

Hence, option D is correct.

Learn more about radioactive here:

https://brainly.com/question/1770619

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Answer:

Unlike alpha and beta particles, which have both energy and mass, gamma rays are pure energy. Gamma rays are similar to visible light, but have much higher energy. Gamma rays are often emitted along with alpha or beta particles during radioactive decay.

-Radiation basics.

Explanation:

Answer:

Unlike alpha and beta particles, which have both energy and mass, gamma rays are pure energy. Gamma rays are similar to visable light, but have much higher energy. Gamma rays are often emitted along with alpha or beta particles during radioactive decay.

Explanation:

Answer:

D

Explanation:

You balance an equation so that all the elements have the same number of atoms on each side of the equation.

arts Per Thousand ... Click advance year 10 times. ... Which organism was most hurt by increased storms, and why do you think this is so? ... On the Coral Reef tab I see less fish and on the Data tab I see Staghorn Coral has majorly decreased. ... B. How does this change the populations of the two species that eat algae, ...

Answer:

increase: yellow tail snapper

decrease: grouper, parrotfish, angelfish

Explanation:

Answer:

50.9 g of Ag

Explanation:

Reaction is:

Cu (s) + 2AgNO₃(aq)  →  2Ag (s) + Cu(NO₃)₂ (aq)

1 mol of Cu react to 2 moles of silver nitrate in order to produce 2 moles of solid silver and 1 mol of copper (II) nitrate.

We assume, the silver nitrate in excess.

We determine moles of copper → 15 g . 1mol / 63.55 g = 0.236 moles

Ratio is 1:2. 1 mol of copper produce 2 moles of silver

0.236 moles of Cu will produce (0.236 . 2) / 1 = 0.472 moles of Ag

We deterine mass of silver:

0.472 mol . 107.87 g /mol = 50.9 g

Answer:

98.07848

Explanation:

I assume you are converting between grams H2SO4 and mole. You can view more details on each measurement unit: molecular weight of H2SO4 or mol This compound is also known as Sulfuric Acid. The SI base unit for amount of substance is the mole.

Answer:

8moles

Explanation:

n=m/GFM

n=784/98.02

n=7.998

n=8moles

Answer: The volume of stock solution of calcium chloride required is 10 mL.

Explanation:

A solution consists of solute and solvent. A solute is defined as the component that is present in a smaller proportion while the solvent is defined as the component that is present in a larger proportion.

To calculate the amount of solute needed, the formula used is:

[tex]C_1V_1=C_2V_2[/tex]             ....(1)

where,

[tex]C_1\text{ and }V_1[/tex] are the concentration and volume of stock solution of calcium chloride

[tex]C_2\text{ and }V_2[/tex] are the concentration and volume of diluted solution of calcium chloride

Given values:

[tex]C_1=15.0M\\C_2=0.300M\\V_2=500mL[/tex]

Plugging values in equation 1:

[tex]15.0\times V_2=0.300\times 500\\\\V_2=10mL[/tex]

Hence, the volume of stock solution of calcium chloride required is 10 mL.

Answer: Covalent bonding occurs when electrons are shared between atoms. The correct option is A.

Explanation:

When atoms form a bond by sharing one or more pairs of electrons the bond is referred to as a COVALENT BOND. This is so because CV there is a natural drive for atoms to attain the electronic configuration of Group 0 which has a completely filled outermost shell of eight electrons. The covalent bond usually occurs among non- metals. Example of covalent bonding is seen in the formation of chlorine and carbondioxide molecules. Chloride atom which contains seven electrons in its outermost shell shares an electron with another chloride atom to attain a filled outermost shell leading to the formation of a chlorine molecule.

The characteristics of a covalent compound includes:

--> they contain only molecules. There are no ions, hence they do not conduct electricity.

--> they dissolve in organic solvents. They are insoluble in water.

--> they have low melting and boiling points.

Answer:

The correct approach is "-2.67 kJ/mole". A further solution is described below.

Explanation:

The given values are:

No. of moles,

= 5.60 mol

Substance releases,

ΔH = 14.9 kJ

Now,

The ΔH in terms of kJ/mol will be:

= [tex]\frac{\Delta H}{5.60}[/tex]

On putting the given values of ΔH, we get

= [tex]\frac{-14.9}{5.60}[/tex]

= [tex]-2.67 \ kJ/mole[/tex]

Answer:

43.7 g

Explanation:

unit mass of NaCl = (23 + 35.5) u = 58.5 u

58.5 is the mass of one unit formula of NaCl (since NaCl is not a molecular compound)

1 u = 1.661×10^-24 g

if 1 unit formula of NaCl has 58.5 u, then 4.5×10²³ units of NaCl will have:

58.5 u × (1.661×10^-24 g/1 u) × 4.5×10²³ = 43.7 g

Answer:

Explanation:

i have already given the answer earlier. you could click this link:

https://brainly.com/question/23568294