can I please get help with it ​

answer:

a^2+b^2= (a+b)² -2ab

Answer:

b. a firework exploding

Explanation:

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%

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:

valence electrons

Explanation:

valence electrons

Answer:

The blue color of the sky is caused by the scattering of sunlight off the molecules of the atmosphere.

Explanation:

Answer:

sun shine

Explanation:

Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time

Answer:

How much heat energy required to convert following?

How much heat energy, in kilojoules, is required to convert 47.0 g of ice at -18.0 C to water at 25.0 C ?

Specific Heat of Ice - 2.09 j/g * c

This is how I did it and the answer is wrong...Please check and correct me

Q = m * Cice * Change in Temp

Q = (47.0 g)(2.09 J/g*c)(43) = 4222.6 J * 0.001 kj / j = 4.22 kj

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.

Answer:

both plant and animal cells must break down food molecules to get energy from them

Answer:

The picteure isnt lodeing

Explanation:

mark brainly

Answer:

NaH one atom of sodium react with one hydrogen to form sodium hydride

Explanation:

Answer:

A

Explanation:

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:

The answer is nucleic acid

Answer:

(DNA) is a molecule that encodes an organism's genetic blueprint

Explanation:

Deoxyribo Is the D

nucleic Is the N

acid Is the A

{DNA}

Hope that helps :)

Answer: 1, magnesium & mg

2, two energy shells

Explanation:

Answer:

The principle of cross-cutting relationships states that a fault or intrusion is younger than the rocks that it cuts through. ... So the fault must be the youngest formation that is seen. The intrusion (D) cuts through the three sedimentary rock layers, so it must be younger than those layers

Explanation:

Answer:

They are eukaryotic, which means they have a nucleus. Most have mitochondria

Answer:

Temperatures decrease with increasing height as the ozone layer is left behind and the air thins out with increasing altitude. The lowest portion of the low-pressure mesosphere is heated by the warm air of the upper stratosphere. This heat radiates upward, getting less intense as altitude increases.

Explanation:

Brainliest please?

Answer:

false

Explanation:

Craters on the Moon are caused by asteroids and meteorites colliding with the lunar surface. The Moon's surface is covered with thousands of craters. ... It also has very little geologic activity (like volcanoes) or weathering (from wind or rain) so craters remain intact from billions of years.

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 24 × 1200

We have the final answer as

Hope this helps you

Answer:

The volume in milliliters is 250mL

Explanation:

The volume of a rectangle is obtained using the equation:

Volume = Length * Width * Height

In the problem, we can take length as 5cm, width as 5cm and height as 10cm. Thus, volume of the rectangular box is:

Volume = 5cm * 5cm * 10cm

Volume = 250cm³

1mL = 1cm³.

That means the volume in milliliters is 250mL

Answer: The formula for boron phosphite  is  BP

Explanation:

The answer would be BP

Hope this helped!

Explanation:

Parents pass characteristics such as hair color, nose shape, and skin color to their offspring. Not all of the parents' characteristics will appear in the offspring, but the characteristics that are more likely to appear can be predicted.

I'm just trying to answer questions. T^T

Answer:

physical

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

Answer:

im not sure man

Explanation: