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Answer:

5:4

Explanation:

The equation given is balanced. There are 5 O2's on the left (reactant side) and then 4 H2O's on the right (product side). Thus, it's a 5:4 ratio.

Answer:

Dilute sulfuric acid reacts with metals higher than hydrogen in the reactivity series to form sulfate salts and hydrogen gas. Note the metal reactions are different with concentrated sulfuric acid. Iron is cleaned free from rust prior to coating with tin to form tinplate and with zinc to form galvanized iron.

Answer:

Mitosis

Explanation:

Answer:

11.958129200057586 molecules

Explanation:

Answer:

C Evidence of Physical change

Explanation:

Because Solid forms is a physical change and so are all the other ones    

Answer:

i believe it would be 12

Explanation:

because 3*4 is 12

Answer:

Acceleration Of B IS greater

Explanation:

F= mass x accelerarion

Acceleration of ( A) =20÷5 =4

Acceleration of (B) =5

Answer:

1280.27 g

Explanation:

Pressure = 22 mmHg / 760 = 0.0289 atm (Converting to atm by dividing by 760)

Volume = 2.7 L

Temperature = 31 ∘C + 273 = 304 K

Mass = ?

Using the ideal gas equation;

PV = nRT

n = RT / PV = 0.0821 * 304 / ( 0.0289 * 2.7)

n = 319.86 mol

Mass = Number of moles * Molar mass

Mass = 319.86  * 4.002602

Mass = 1280.27 g

Answer:

There are seven periods in the modern periodic table.

Answer:

Seven periods

Explanation:

There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements.

Answer: [tex]Fe^{2+}(aq)+2e^-\rightarrow Fe(s)[/tex]

Explanation:

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

 Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

[tex]Mg(s)+Fe^{2+}(aq)\rightarrow Fe(s)+Mg^{2+}(aq)[/tex]

The oxidation half reaction is:

[tex]Mg(s)\rightarrow Mg^{2+}(aq)+2e^-[/tex]

The reduction half reaction is:

[tex]Fe^{2+}(aq)+2e^-\rightarrow Fe(s)[/tex]

Answer:

A

Explanation:

edge

Answer:

1. start line drawn in ink

2. start line below solvent level

Explanation:

1. the line would run up the paper. should have drawn with pencil.

2. the samples would dissolve into solvent and not run up the paper.

Answer:

Oranges

Explanation:

     Oranges have a lot of genetic diversity within them, since oranges were already well versed in growing in winter months, oranges have gentically modified themselves through natural selection into be able to prouduce in warmer climates. Oranges also have changes in genetics which gives them a lot of gentic diversity that effects their, size, taste, texture, acidity and ability to reproduce.

Answer:

3.88

Explanation:

Answer:

[tex]P_{CO_2}=25mmHg[/tex]

Explanation:

Hello there!

In this case, according to the Dalton's law, which explains that the total pressure of a gaseous system equals the sum of the partial pressures of the gases composing, for the gaseous mixture composed by oxygen, nitrogen and carbon dioxide it would be possible to write:

[tex]P_{tot}=P_{N_2}+P_{O_2}+P_{CO_2}[/tex]

Now, given the pressure of the system and those of oxygen and nitrogen, we calculate that of carbon dioxide as shown below:

[tex]P_{CO_2}=P_{tot}-P_{N_2}-P_{O_2}\\\\P_{CO_2}=250mmHg-50mmHg-175mmHg\\\\P_{CO_2}=25mmHg[/tex]

Best regards!

it's neutral

Explanation:

on the ph scale 7-8 is in the middle and everything after 8 is acidic and everything under 7 is basic. (you can look up a picture of a ph scale you will see what I mean)

This solution is neutral .

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Answer:

Oxygen will have the highest electronegativity

Answer:

Structural formula

Explanation:

This is because structural formula is use to show or indicate chemical bonds that are present between atoms of molecules. structural formula comprises of symbols that represent the atoms which are connected by short lines which indicate the presence chemical bonds which could be single line, double lines or even triple lines.

Answer:

50

Explanation:

Answer:

12

Explanation:

i feel like its 12 because moles are medium sized but are they adult moles or baby moles or growing moles

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 0.803moles of nitrogen gas  are there in  a 18 L tank of nitrogen gas at STP.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

number of moles of any ideal gas =given volume ÷Volume occupied by one mole of a ideal gas at STP

Volume occupied by one mole of a ideal gas at STP=22.4L

given volume of nitrogen gas= 18 L

substituting all the given values in the above equation we get,

number of moles of nitrogen gas =18 L ÷22.4L

number of moles of nitrogen gas =0.803moles

Therefore, 0.803moles of nitrogen gas  are there in  a 18 L tank of nitrogen gas at STP.

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Answer:h

Explanation:

G

KOH is a strong base, so [OH-] = 0.10 M = 1.0 x 10^-1 M

[H+][OH-] = Kw

Kw = 1.0 x 10^-14

[H+] = 1.0 x 10^-14 / 1.0 x 10^-1 = 1.0 x 10^-13 M

Answer:

3

Explanation:

Answer:

21

Explanation:

sffbhvvfcycuxcydghcdeGf you've ydhgc yfyff ygg TX church Uruguay t vitrified

The wave which is having higher frequency is associated with higher energy. In the given wave, the part B is labelling the lowest energy sound.

Sound waves are longitudinal mechanical waves passing through a medium. In a longitudinal wave the oscillation of particles is in a direction along the wave propagation.

A sound wave is composed of rarefactions and compressions. The area where, the particles have some separation with lower  pressure is called rarefactions.

The area of high pressure where, the oscillating particles are closely packed is called compression of the wave. As the frequency of the wave increases, its energy increases, Therefore, the less frequency part B represent lowest energy sound.

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Answer:

50 moles

Explanation:

took the quiz

Answer:

pH=5

Explanation:

-log(1 x 10-5)=5