Look at the image pls

Answer:

Word equation carbon + oxygen → carbon dioxide

Chemical equation C + O2 → CO2

Answer:

it is cooler and dimmer remember this red stars are old stars near their death

Answer:

C.4

Explanation:

Explanation:

1.False

2.False

3.True

4.True

5.False

Explanation:

Second answer is the correct one.

Answer  b

Explanation:

Answer: B. Isotopes of the same element have the same number of neutrons and a different number of protons.

Explanation: Founders Educere answer.

Good luck my fellow summer school students, I love you all.

Please rate, thanks, & vote brainliest, I want a rank up already.

Answer:

bamboo is the biggest/tallest grass in the world

Answer:

Giant Bamboo

Explanation:

Giant bamboo, which can grow up to 151 feet tall, is the largest variety of grass.

Answer:

Sodium hydroxide us formed during the electrolysis of sodium chloride solution.

Explanation:

During electrolysis, hydrogen and chloride ions are removed from the solution, whereas sodium and hydroxide ions are left behind in solution.

Hope this helped

Answer:

Prophase I

Sorry if wrong I was rushing !!

Answer:

N₂

Explanation:

Sodium is a larger molecule with a much higher molecular weight. However, 20g of N₂ would be a smaller amount of molecules than 20g of sodium due to how there are multiple nitrogen molecules.

2/3 * given mass of N₂ = mass of N₃

N₃ (Azide ion) given mass = 20g

Na = 20g

Masses of chemicals are equal

Na = 22.990g/mol

20g/22.990g/mol = 0.8699mol of Na

N₃ = 20g

N₃ = N g/mol x 3

N = 14.007 g/mol

14.007 x 3 = 42.021 g/mol

N₃ = 42.021g/mol

20g/42.021g/mol = 0.4759 mol of N₃

Notice how there are fewer moles of the Azide ion than the Sodium.

0.4759 moles of NaN₃ is produced

combine molecular weights:

42.021 + 22.990 = 65.011 g/mol

multiply by amount of moles of the limiting reactant:

0.4759 mol *65.011 = 30.942 g

Also, here is the balanced equation:

3N₂ + 2Na = 2NaN₃

The results are the same as the balanced equation.

Answer:

Evaporation

Explanation:

Students are to mix the solvent to dilute completely,and get and evaporation dish,candle(heat),tripod stand...pour the solution in the evaporation dish and place it on tripod stand above the candle wait for some time the water will change into gas and to get the water they have to cover the evaporating and direct it to a different container to get the water and salt

Answer:

pH = 1.522

Explanation:

HCl + H20 -> Cl^(-) + H30^(+)

0.03M ____ ____

____ 0.03M 0.03M

[H30^(+)] = 0.03M

pH = - log([H30^(+)])

pH = - log( 0.03)

pH = 2 - log3

pH = 2- 0.47

pH = 1.522

The pH of the hydrogen chloride, HCl solution having a concentration of 0.03 M is 1.52

This is simply a measure of the acidity / alkalinity of a solution.

The pH measures the hydrogen ion concentration while the pOH measures the hydroxide ion concentration

Dissociation equation

HCl(aq) —> H⁺(aq) + Cl¯(aq)

From the balanced equation above,

1 mole of HCl contains 1 mole of H⁺.

Therefore,

0.03 M HCl will also contain 0.03 M H⁺

pH = –Log H⁺

pH = –Log 0.03

pH = 1.52

Learn more about pH:

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Answer: 15 L of [tex]N_2[/tex] gas will have same numer of molecules as 15L of [tex]CO_2[/tex] gas at the same temperature and pressure,

Explanation:

According to avogadro's law, equal moles of gases occupy equal volume at same conditions of temperature and pressure.

[tex]\text{Number of moles}=\frac{\text{Given volume}}{\text{Molar volume}}[/tex]

[tex]\text{Number of moles of} CO_2=\frac{15L}{22.4L/mol}=0.67mol[/tex]

[tex]1 mole of CO_2[/tex] contains=[tex]6.022\times 10^{23}[/tex]  molecules of [tex]CO_2[/tex]  

Thus 0.67 moles of [tex]CO_2[/tex] contains=[tex]\frac{6.022\times 10^{23}}{1}\times 0.67=4.03\times 10^{23}[/tex] molecules

Now molecules of [tex]N_2[/tex] = molecules of [tex]CO_2[/tex] = [tex]4.03\times 10^{23}[/tex]

[tex]6.023\times 10^{23}[/tex] molecules of [tex]N_2[/tex]  = 22.4 L

Now [tex]4.03\times 10^{23}[/tex]  molecules of [tex]N_2[/tex] = [tex]\frac{22.4}{6.023\times 10^{23}}\times 4.03\times 10^{23}=15L[/tex]

Answer:

flower hope this helps and have a nice day too!

Explanation:

got a 100 percent on a test.

Answer:

flower

Explanation:

Answer:

[tex]6.8 molH_2O[/tex]

Explanation:

Hello there!

In this case, for this balanced chemical reaction about the combustion of methane, it is possible for us to inspect the 2:2 mole ratio of water to oxygen as given for their coefficients in the balanced chemical reaction.

In such a wat, given 6.8 moles of oxygen, we can easily obtain the produced moles of water by applying the aforementioned mole ratio as shown below:

[tex]6.8molO_2*\frac{2molH_2O}{2molO_2}\\\\6.8 molH_2O[/tex]

Best regards!

During meiosis 1, the parent cell with double the normal amount of chromosomes, splits into two diploid cells (have enough chromosomes to survive). During meiosis 2, the two diploid cells each split into two haploid cells (have half the amount of chromosomes to survive). Meiosis ends with four haploid cells.

Answer:

mncL2 is the water molecule

Answer:

a) Cell theory

Explanation:

Cell theory states that cells are the basic unit of life

Answer:

1. The pressure will be 32 atm, twice the initial pressure.

2. The pressure will be 1.83 atm, one third of the initial pressure.

Explanation:

Boyle's law is one of the gas laws that relates the volume and pressure of a certain quantity of gas kept at a constant temperature.

This law says that "The volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure." This means that if the pressure increases, the volume decreases, while if the pressure decreases, the volume increases.

Boyle's law is expressed mathematically as:

Pressure * Volume = constant

or P * V = k

Ahora es posible suponer que tienes un cierto volumen de gas V1 que se encuentra a una presión P1 al comienzo del experimento. Si varias el volumen de gas hasta un nuevo valor V2, entonces la presión cambiará a P2, y se cumplirá:

P1*V1=P2*V2

1. In this case:

So:

16 atm*V1= P2* [tex]\frac{V1}{2}[/tex]

Solving:

[tex]\frac{16 atm*V1*2}{V1}[/tex]=P2

16 atm*2= P2

32 atm= P2

The pressure will be 32 atm, twice the initial pressure.

2. Now

So:

5.5 atm*V1= P2* V1*3

Solving:

[tex]\frac{5.5 atm*V1}{3*V1}[/tex]=P2

[tex]\frac{5.5 atm}{3}[/tex]= P2

1.83 atm= P2

The pressure will be 1.83 atm, one third of the initial pressure.

Answer:

[H2] = [I2] = 0.64M; [HI] = 4.72M

Explanation:

Based on the reaction:

H2 + I2 ⇄ 2HI

The K is defined as:

k = 54.3 = [HI]² / [H2] [I2]

Where [] is molar concentration of each reactant at equilibrium

As the initial concentration of HI is 6mol/dm^3 = 6M the equilibrium concentration of each reactant is:

[H2] = X

[I2] = X

[HI] = 6 - 2X

Where X is reaction coordinate

Replacing:

54.3 = [6-2X]² / [X] [X]

54.3X² = 4X² - 24X + 36

0 = -50.3X² - 24X + 36

Solving for X:

X = -1.12. False solution, produce negative concentrations

X = 0.64M. Right solution

Replacing:

[H2] = 0.64M

[I2] = 0.64M

[HI] = 6 - 2*0.64M = 4.72M

Equilibrium concentrations are:

The true statement about the Moon is: A. The Moon is always moving around Earth in a circle.

A Moon can be defined as the natural satellite of planet Earth that shines due to the Sun's reflected light, as it revolves around the Earth from west to east in 29½ days.

Generally, there are four (4) primary Moon phases and these are:

In conclusion, the true statement about the Moon is that it is always moving around Earth in a circle.

Read more on the Earth here: brainly.com/question/1286910

Answer:

Answer:

supersaturated

Explanation:

Answer:

B

Explanation:

it will not be waterproof anymore

Answer: B.     3-bromo-5-ethyl-2-methyloctane

Explanation:

The correct name of the compound as we can see is 3-bromo-5-ethyl-2-methyloctane.

The IUPAC nomeclature shows the standard,,  approved pattern for naming organic compounds. As a matter of fact it is intended to enable pratitioners to write the name of a compound from structure.

The correct name of the compound as we can see is 3-bromo-5-ethyl-2-methyloctane.

Learn more about IUPAC nomeclature: https://brainly.com/question/14356798

Answer:

Oceans, Fossil fuels, atmosphere