A weather balloon filled with helium has a volume of 700 L at STP. To find the mass of helium which conversion factors would you use
A) 22.4 L/mol x 4 g/mol
B) 700 L / 4 g/mol
C) (22.4 L/mol / 700 L ) / (4 g/mol)
D) (700 L / 22.4 L/mol) (4 g/mol)

Answer:

B. shape of wings

Explanation:

Insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. Insects have segmented bodies, jointed legs, and external skeletons (exoskeletons).

Higher classification: Hexapoda

Answer:

Erosion

Explanation:

Answer:

750

Explanation:

Answer:

Please make it full I'm not seeing it

Answer:

Hexane will not have any dipole-dipole interactions because it is a non-polar molecule

Explanation:

Explanation:

This causes regions of both of these molecules that have partial negative charges and other regions wind up with partial positive charges. Hexane will not have any dipole-dipole interactions because it is a non-polar molecule. The intermolecular forces between hexane molecules will be dispersion forces.

Answer:

22.75 L CO2

Explanation:

Balance the Equation

C5H12  +  O2 ==>   CO2 + H2O        Balance the Carbons

C5H12  +  O2 ==>   5CO2 + H2O     Now balance the Hydrogens

C5H12  +  O2 ==>   5CO2 + 6H2O   Now count up the oxygens on the right.

5*O2 + 6O ==> 10 O + 6 O ===> 16 Oxygens.

You have 2 on the left. You have to multiply the oxygens by 8

C5H12  +  8O2 ==>   5CO2 + 6 H2O

The equation is now balanced.

Now find out how much oxygen is needed to burn 9.32 L of Pentane

1 Liter Pentane / 8 Liters Oxygen = 9.32 L Pentane / x     Cross multiply

x = 8 * 9.32

x = 74.56

Read this next sentence very carefully. You need 74.56 Liters of oxygen to burn all the pentane you have. There's not that much there. You only have 36.4 Liters of Oxygen. Some of the pentane won't get burned. Consequently there will be a shortage of CO2 as well.

Find out the number of Liters of Pentane that will be burned up.

1 / x =  8 / 36.4               Cross multiply

8x = 36.4                        Divide by 8

8x/8 = 36.4/8

x = 4.55 Liters of Pentane will be  used up.

Find the number of Liters of CO2

For every Liter of Pentane, 5 Liters of CO2 will be produced.

1/5 = 4.55/x                      Cross Multiply

x = 5 * 4.55

x = 22.75

Answer:

Stoichiometry relates moles of reactant to moles of product

Explanation:

Just took the quiz :)

Answer:

Stoichiometry relates moles of reactant to moles of product.

Explanation: :)

Answer:

Updrafts characterize a storm's early development, during which warm air rises to the level where condensation begins and precipitation starts to develop. In a mature storm, updrafts are present alongside downdrafts caused by cooling and by falling precipitation.

Hope it helps  

Have a great Day : P

Explanation:

Soap solution is called a mixture because you're combining a ratio of liquid soap and water to make a mixture.

Answer:

Demonstrate familiarity with the pH scale ... body (excluding things like stomach acid) measure around 7.2 and 7.6 on the pH scale (a 7 is neutral on the scale). ... The pH of a solution is a measure of its acidity or alkalinity (base). ... Using a pH meter, you find the pH of an unknown solution to be 8.0.

Explanation:

Answer:

7 is neutral, acids are 1-6, bases are 8-14. Pure water has a pH of 7, where as almost everything else is either an acid or a base.

Answer:

27J

Explanation:

Answer: 18 moles of oxygen will be used.

Explanation:

Combustion is a chemical reaction in which a hydrocarbon is oxidized in the presence of oxygen to give carbon dioxide and water.

The balanced chemical reaction for combustion of ethanol is:

[tex]C_2H_6O+3O_2\rightarrow 2CO_2+3H_2O[/tex]

According to stoichiometry :

1 mole of ethanol require  = 3 moles of [tex]O_2[/tex]

Thus 6 moles of ethanol will require=[tex]\frac{3}{1}\times 6=18moles[/tex]  of [tex]O_2[/tex]

Thus 18 moles of oxygen will be used.

Answer:

I think its sun but I'm not sure

Answer:

In fact, a full scuba tank will gain about 5-6 psi for every degree of temperature increase. This is one reason that full tanks should not be left in a hot trunk of a car. A tank filled to 3000 psi could easily reach 3500 psi if the temperature of it increased substantially.

Answer:

My best guess would be pressure

Explanation:

I say pressure because it just makes more sense

Answer:

In science, sound is defined as the transfer of energy from a vibrating object in waves that travel through matter. Most people commonly use the term sound to mean what they hear when sound waves enter their ears. The tree above generated sound waves when it fell to the ground, so it made sound according to the scientific definition

Explanation:

sound waves

Answer:

NaOH

Explanation:

Sodium hydroxide is the base in the acid-base reaction as all other acids and sodium chloride is salt and water is neutral.

According to the Arrhenius concept, base is defined as a substance which yields hydroxyl ions on dissociation.These ions react with the hydrogen ions of acids to produce salt in an acid-base reaction.

Bases have a pH higher than seven as they yield hydroxyl ions on dissociation.They are soapy in touch and have a bitter taste.According to the Lowry-Bronsted concept, base is defined as a substance which accepts protons .Base react violently with acids to produce salts .Aqueous solutions of bases can be used to conduct electricity .They can also be used as indicators in acid-base titrations.

They are used in the manufacture of soaps,paper, bleaching powder.Calcium hydroxide ,a base is used to clean sulfur dioxide gas while magnesium hydroxide can be used as an antacid to cure acidity.

Learn more about base,here:

https://brainly.com/question/12445440

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Answer:

imcomplete dominance

Explanation:

because it is

Answer:

layer 1 is the same age as layer C

layer 3 is the same age as layer D

Answer:

d = 0.53 g/mL

Explanation:

Given that,

Mass of an unknown metal = 40 g

The volume of the metal = 75 mL

We need to find the density of the metal. We know that,

Density = mass/ volume

[tex]d=\dfrac{40\ g}{75\ mL}\\\\d=0.53\ g/mL[/tex]

So, the density of the metal is 0.53 g/mL.

Answer:

try A

Explanation:

Answer:

B. Water moving pieces of rock from one place to another is an example of chemical weathering!

hope it helps

please mark as the brainliest!

Answer:

it should be B (i did this wrk before)

Explanation:

Answer:

The iron present in the solution is reduced because of the presence of SCN⁻ ions in solution

Explanation:

The clue in this problem is the color of the solution:

A solution of Fe³⁻ is yellow but when the Fe³⁺ is reduced by an oxidant to Fe²⁺ the solution change to orange color.

The SCN⁻ ion is a reducing agent than, in presence of a substance that can be reducted as Fe³⁺ ion will promote the reaction. That means the best explanation is:

Answer:

Answer:

189.6 mL

Explanation:

As per Boyles law when a gas is kept at a constant temperature and mass in a closed container, the volume and pressure vary inversely.

P1V1= P2V2

Here, P1 = 0.79 atm, V1 = 240 ml, P2= 1 atm

therefore, substituting values in above equation we get

0.79×240 = 1×V2

⇒V2 = 189.6 ml

therefore,  its volume at STP (1 atm and 0 oC) = 189.6 ml

Answer:

6.6 g

Explanation:

La ecuación de la reacción es;

MnO2 + 4 HCl -------> MnCl2 + Cl2 + 2H2O

Número de moles de HCl que reaccionan = 7.5g / 36.5 g / mol = 0.21 moles

Dado que;

4 moles de HCl producen 1 mol de MnCl2

0,21 moles de HCl producen 0,21 * 1/4 = 0,0525 moles de MnCl2.

Masa de MnCl2 = 125,844 g / mol * 0,0525 moles = 6.6 g