What mass of methane gas (CH4) is required in order to follow the Law of
Conservation of Mass?

Answer:

A. light energy is used in photosynthesis and created by respiration

Answer:

Sulfur has the same amount, like all the other elements in group 16, has six valence electrons.

Explanation:

Answer:

give me the question and I can help you

Answer: food, chemical

Explanation:

Cellular respiration is a process in which the food or glucose reserve is oxidized so as to produce chemical form of energy in the form of ATP, that is used by the body's cell to perform metabolic activities within the cell. During this process the glucose in the presence of oxygen is converted into water and carbon dioxide and the chemical form of energy so produce is called adenosine triphosphate or ATP. Thus in the end chemical energy is produced.

Answer:

The population of predatory fishes will change.

The biodiversity of the ecosystem will decrease.

Explanation:

Answer:

The population of predatory fishes will change.

The biodiversity of the ecosystem will decrease.

Explanation:

Im on the edmentum mastery test.

Hiiii- Are you asking what the element of Hu is???

If so- it's Hundium.

...

If this was just a random keyboard spam of a question, then Huuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu to you too

Answer:

The pressure of the gas at 23 C is 179.92 kPa.

Explanation:

Gay-Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.

In short, when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases.

Gay-Lussac's law can be expressed mathematically as follows:

[tex]\frac{P}{T} =k[/tex]

Studying two states, one initial 1 and the other final 2, it is satisfied:

[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]

In this case:

Replacing:

[tex]\frac{310 kPa}{510 K} =\frac{P2}{296 K}[/tex]

Solving:

[tex]P2=296 K*\frac{310 kPa}{510 K}[/tex]

P2= 179.92 kPa

The pressure of the gas at 23 C is 179.92 kPa.

Answer:

I think it might be liquid

Answer: in a molecular molecules move just enough to stay close together but not to stick

Explanation:

Answer:

9.598 × 10⁻¹¹ m

0.09598 nm

9.598 × 10⁻⁹ cm

Explanation:

Step 1: Given data

Distance between oxygen and hydrogen in water (d): 95.98 pm

Step 2: Convert "d" to meters

We will use the conversion factor 1 m = 10¹² pm.

95.98 pm × 1 m/10¹² pm = 9.598 × 10⁻¹¹ m

Step 3: Convert "d" to nanometers

We will use the conversion factor 1 m = 10⁹ nm.

9.598 × 10⁻¹¹ m × 10⁹ nm/1 m = 0.09598 nm

Step 4: Convert "d" to centimeters

We will use the conversion factor 1 m = 100 cm.

9.598 × 10⁻¹¹ m × 100 cm/1 m = 9.598 × 10⁻⁹ cm

Answer:

When you exercise and your muscles work harder, your body uses more oxygen and produces more carbon dioxide.

Explanation:

Because your muscles are working harder when you exercise, your body requires more oxygen and produces more carbon dioxide.

Exercise is characterized as a physiological movement that maintains or enhances total physical wellness. People who exercise are less likely to get diseases and to maintain a healthy weight. Type 2 diabetes, heart disease, high blood pressure, and weight gain can all be warded off with regular exercise. Leaping, jogging, or lifting weights are examples of exercises that can support bone health.

The lungs both provide the body with oxygen, which gives you energy, and remove carbon dioxide from the system, which is a byproduct of energy production. The heart pumps oxygen-rich blood to the working muscles. Because your muscles are working harder when you exercise, your body requires more oxygen and produces more carbon dioxide.

Thus, because your muscles are working harder when you exercise, your body requires more oxygen and produces more carbon dioxide.

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Answer:

46.9 atm

Explanation:

Applying Van der waals equation

P = [nRT/(V-nb)]- (an²/V²)............... Equation 1

Where P = pressure, T = temperature, n = number of moles, V = volume, R = Universal constant, a and b = gas constant

Given: n = 20 moles, R = 0.08205 L.atm/mol.K, T = 273 K, V = 10.0 L, a = 0.0341 atm.L²/mol², b = 0.0237L/mol

Substitute these values into equation 1

P = [(20×0.08205×273)/(10-20×0.0237)]-(0.0341×20²/10²)

P = (447.993/9.526)-0.1364

P = 47.028-0.1364

P = 46.9 atm

Answer:

Yes it is hard. For some of us. I already gave up, but now hes coming back. Id say sometimes its useless to get his attention if he never even pays attention to you anyways. It sucks because its so hard to get then to notice you for once.

Explanation:

Answer:

Rabbbits are scared so if there is an increase in the snake population they would try and hide and run from it bur hawks also prey on rabbits but not every hawk so Im going with bthe snake answer .

Explanation:

Explanation:

—COOH and —NH₂

Carboxylic Acid and Amino group

-TheUnknownScientist

Answer: acttachec pic

The last carbon have the H on there, forgot to put it in :)

The Fischer projection of L-ketononose is:

  H

  |

CH₂OH-C=O-H

  |

  C

  |

  CH₂OH

Fischer projection is a two-dimensional representation of a three-dimensional molecule. In Fischer projection, the carbon atoms are drawn as vertical lines, and the hydrogen atoms and hydroxyl groups are drawn on the right-hand side or left-hand side of the carbon atoms. The carbonyl group is always drawn at the top of the Fischer projection.

The L-configuration is a type of configuration that is assigned to organic molecules based on the orientation of the hydroxyl group on the penultimate carbon atom. If the hydroxyl group is on the left-hand side of the Fischer projection, the molecule is assigned the L-configuration. If the hydroxyl group is on the right-hand side of the Fischer projection, the molecule is assigned the D-configuration.

In the Fischer projection of L-ketononose, the hydroxyl group on the penultimate carbon atom is on the left-hand side, so the molecule is assigned the L-configuration.

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Answer:

1) it takes 13 second

2) 2100 miles

3) 40 miles / hours

4) 730 meters

Answer:

Molarity of our solution= 0.46=0.5

Explanation:

When diluting a solution we can use the formula: 1 1 = 2 2

= M= Molarity of the solution

=V=volumes

On the left side, we'll put what we know/already have and on the right side of the formula we'll put down what we want to dilute it to.

Let's plug in what we already know.

(0.700M)(2L) = (M2)(3L)

Solve for M2 by dividing both sides by 3 so M2 will be by itself.

(0.700M)(2L)/(3L) = M2

M2= 0.46, we can round it up to 0.5

Answer:   B. Magnesium, strontium, radium, barium

Explanation:

Elements are distributed in groups and periods in a periodic table.

Elements that belong to same groups will show similar chemical properties because they have same number of valence electrons.

Magnesium (Mg) , Strontium (Sr) , Radium (Ra) and Barium (Ba) are elements which belong to Group 2. They have 12, 38, 88 and 56 electrons respectively and contain 2 valence electrons each and need one electron to complete their octet.

The chemical reactivity of elements is governed by the valence electrons present in the element and thus they are alike in physical and chemical properties.

Answer:

b

Explanation:

i think its b because theories are usually developed after many experiments/tests by different scientists. at least i think so lol i dont remember too much from biology

Answer:  

50 milliliters of acetone solution

Explanation:

If a solution is 40% by volume of acetone, then we have  40 mL of acetone in a 100 mL solution. So if we have 20 mL of acetone, we get: 100 mL solution 40 mL ( CH3) 2CO⋅

20mL (CH3) 2CO  =50mL solution

The volume percent of 40% indicates that 40 ml of acetone is present in 100 ml solution. Then, 20 ml acetone can be made into 50 ml solution.

Volume percentage is a common term used to express the concentration of a solution. Volume percentage of a solution is the ratio of the volume of the solute to the volume of the solvent multiplied by 100.

The volume percentage of the solution measures how much volume of the solute is present in 100 ml of the solution. Thus a 50% by volume solution is 50 ml solute in 100 ml solution.

Given that volume percentage of acetone = 40%.

that is 40 ml of acetone is present in 100 ml of the solution.

Therefore, the volume of the solution containing 20 ml of acetone is :

(20 × 100)/40 = 50 ml.

Therefore, 50 ml of  40% by volume o solution can be made by 20 ml of acetone.

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Answer:

The answer copper carbonate

Explanation:

A matchstick has a lot of chemical energy stored in it. When the match is struck, it burns and the chemical energy in it produces heat energy and light energy.

brainliest and follow and thanks

Answer:

B. Moderately active metal

Explanation:

Answer:

radioactive decay

Explanation:

Answer:

0.326 mol. is the answer.

Explanation:

No. of moles = Volume (L) / Volume at STP

N = 7.3 / 22.4

N = 0.326 moles

Answer:

ty

Explanation:

(ANS1)— P4 + 5O2 ---> 2P2O5

(ANS2)— C3H8 + 5O2---> 3CO2 + 4H20

(ANS3)— Ca2Si + 4Cl2 ---> 2CaCl2 + SiCl4

Answer:

(ANS1)— P4 + 5O2 ---> 2P2O5

(ANS2)— C3H8 + 5O2---> 3CO2 + 4H20

(ANS3)— Ca2Si + 4Cl2 ---> 2CaCl2 + SiCl4

Explanation:

Answer:

11 g

Explanation: