How Do density and atomic Mass change as atomic number increases

5.76 g of [tex]O_2[/tex] are consumed when [tex]C_6H_1_2[/tex] is burned to yield 5.3 grams of [tex]CO_2[/tex].

A mole is defined as 6.02214076 × [tex]10^{23}[/tex] of some chemical unit, be it atoms, molecules, ions, or others.

Calculating moles of [tex]CO_2[/tex]

Number of mole of [tex]CO_2[/tex] = [tex]\frac{\;Given \;mass}{\;Molar \;mass}[/tex]

[tex]\frac{\;Given \;mass}{\;Molar \;mass}[/tex] = [tex]\frac{5.3g}{44 g/mol}[/tex] = 0.12 mol

As is clear from the reaction stoichiometry, 9 moles of [tex]O_2[/tex]6 moles of [tex]CO_2[/tex].

Calculating the number of moles of [tex]CO_2[/tex]

[tex]\frac{0.12 X 9}{6}[/tex] = 0.18 mol

Mass of [tex]O_2[/tex] =5.76 g

Hence, 5.76 g of [tex]O_2[/tex] are consumed when [tex]C_6H_1_2[/tex] yield 5.3 grams of [tex]CO_2[/tex].

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[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

The Correct choice is A. H+ , F- and HF

Since HF is a weak acid, it behaves like an weak electrolyte in water. so, there is incomplete dissociation of HF in water. Therefore, there will be HF molecules present in the solution along with the ions ~

Answer:

yes

Explanation:

sedimentary rocks are erosion, weathering, dissolution, precipitation, and lithification

Sedimentary Rocks are layers of deposited dust,smaller rocks & particles. This means that yes Sedimentary rocks are formed from weathering,erosion & deposition.

I HOPE THIS HELPS <3 and good luck!

Answer:

The volume of the gas decreases.Explanation:

Answer:

As metals are giant lattice structures, the number of electrostatic forces to be broken is extremely large

Explanation:

This means that the melting point and boiling point of metals are more similar to those for ionic compounds than for covalent substances.

Answer:

0.72 grams

Explanation:

Balanced chemical equation for the given reaction is Ba(OH)₂(aq) + 2HNO₃(aq) → Ba(NO₃)₂(aq) + 2H₂O(l).

Balanced equations are those equation in which all entities are present in equal amount on the reactant side as well as on the product side of the chemical reaction.

Balanced chemical reaction will be represented as:

Ba(OH)₂(aq) + 2HNO₃(aq) → Ba(NO₃)₂(aq) + 2H₂O(l)

In the above reaction all entities are present in the equal amount on both side of the chemical reaction.

Hence balanced chemical equation is Ba(OH)₂(aq) + 2HNO₃(aq) → Ba(NO₃)₂(aq) + 2H₂O(l).

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Answer:

0.16 atm

Explanation:

Let's look at the formula PV=nRT. First of all, T should be in kelvin, so let's add 273. Now solve for P so we get P = nRT/V.

Now let's plug these in...

P = (0.034 mol)(0.08206 L atm mol^-1 K^-1)(298 K)/5.1 L

After solving and rounding to sig figs we get 0.16 atm

Answer:

70.1 mL

Explanation:

First let's look at the formula for magnesium nitrate, and get the molar mass, we should end up with Mg(NO3)2 for the formula and this should have a molar mass of 148.3 g/mol.

Lets get the number of moles of the magnesium by taking the number of grams over the molar mass, (21.94 g)/(148.3 g/mol). grams cancel and we're left with approximately 0.148 moles.

Now let's plug our numbers into the molarity formula, M = n/L, this should give us 2.11 mol/L = (0.148 mol)/L, now let's solve for L, divide both sides by 0.148 which will give us 14.26 L^-1 = 1/L now we take the inverse of both sides to get 0.07012 L = L.

Now we have the liters, but the question askes for milliliters, so let's multiply by 1000, and then after rounding to sig figs we will get 70.1 mL as our answer. (Note: I used the exact values instead of the approximations throughout this explanation, so if you calculate the answer by plugging in these values, it might be slightly off.)

The pH of the solution in which 4.85g of HCl is present is 1.3.

pH of the solution will be calculated by using the below equation:
pH = -log[H⁺]

Relation between the mass and moles of any substance will be represented as:

Moles of HCl = 4.85g / 36.4g/mol = 0.13 moles

Given volume = 2.5 L

Concentration in terms of molarity will be calculated as:
M = n/V

M = 0.13mol / 2.5L = 0.05 M

So, 0.05M HCl solution have the same amount of concentration of H⁺ ion. Now pH will be calculated as:

pH = -log(0.05) = 1.3

Hence required pH of the solution is 1.3.

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Answer:

.846 grams of H2

Explanation:

1) The statement "A fire burns down a house" best describes how energy can be harmful.  Option (A) is correct.

2) Among the four boxes, Box D has the highest mass of 700 grams. Option (D) is correct.

3) Among the given boxes, Box C is the one with a mass of 50 grams.

Option (B) is correct.

1) In this scenario, the energy in the form of heat from the fire is released uncontrollably, leading to the destruction of the house. Fire represents a potentially dangerous and destructive form of energy when it is not properly contained or controlled. It illustrates how energy, when harnessed inappropriately or unintentionally, can have harmful consequences, causing damage to property and posing a risk to human safety.

2) This means Box D is the heaviest compared to the other boxes labeled A, B, and C. The mass of each box is shown in the diagram, with Box A weighing 550 grams, Box B 5 grams, and Box C 50 grams. Box D, with 700 grams, has the most significant mass, making it the heaviest box in the set.

3) Since the question asks which box is "under" the box with a mass of 50 grams, we can refer to the diagram and see that Box C is positioned above Box D and Box B. Therefore, the only box that is under Box C is Box A. So, the answer is Box A, as it is positioned below Box C in the diagram.

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The complete question is:

1. Which statement best describes how energy can be harmful?

A A fire burns down a house.

B Electricity heats an oven.

C A lamp lights a house.

D An alarm clock wakes up a sleeping person.

2. The diagram below shows four boxes labeled A, B, C, and D. The mass of

each box is shown.

a) 550 grams

b) 5 grams

c) 50 grams

d) 700 grams

3. Which box is under the box with a mass of 50 grams?

a) box A

b) box B

c) box C

d) box D

From the calculations and the data provided in the question, the required temperature is 380 K.

The Clasius Clapeyron equation is used to obtain the vapor pressure of a substance at two different temperatures.

Hence;

lnP2/P1 = -ΔHvap/R(1/T2 - 1/T1)

ln(145/1) = -40.7 * 10^3/8.314(1/T2 - 1/273)

4.977 = -(4811)(1/T2 - 1/273)

4.977/-(4811) = (1/T2 - 1/273)

-0.00103 = 1/T2 - 1/273

-0.00103 +  1/273 =  1/T2

0.002633 =1/T2

T2 = 380 K

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Answer:

1. East on the box they are facing, West on the side from behind, North on the left side, South on the right side.

2. Because they all were facing towards the sun and the sun rise from east.

3. This one's answer is in the first answer.

4. The picture shows early morning because the shadow of the boys are in a flat position but if would have been late morning then it would not been covering that much area.

Answer:

youre gonna have to include the answers for me to help

Explanation:

Answer: 2

Explanation: Calcium has a +2 charge and PO4 has a -1 charge. When writing this expression, the charges are flipped; instead of Ca2(PO4), it's Ca(PO4)2.

Answer: Mass of substance / Mass of one mole.

Explanation:

Answer:

3 moles

Explanation:

The balanced chemical equation between Calcium Hydroxide and Hydrochloric acid is:

Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O

The ratio of HCl to H₂O is  2 : 2

So if 3 moles of hydrochloric acid is added, 3 moles of water will be formed:

[x is the no of moles of H₂O produced]

2 : 2

3 : x  

[Cross multiply]

2x = 2 × 3

2x = 6

x = [tex]\frac{6}{2}[/tex] = 3 moles

Answer:

reactants are hydrogyn and oxygen, the product is water

Explanation:

Reactants are what start the reaction, they are joined together making a reaction that can result in a mix of both or a really new product. The product is, as named, the product of the reactants reaction, it is the outcome. In this case, hydrogen and oxygen join together, making a reaction that ended up with water(the product).

ur wlcm :)

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1) Heat is transferred from the bath to the bottle. This will cause the temperature of the gas molecules to increase, and thus their kinetic energy will increase. As a result, the size of the balloon will increase.

2) The size of the balloon would decrease because since the temperature is decreasing, the particles have less kinetic energy, and thus are packed more closely together.

Answer:

7.5 kcal

Explanation:

1.0 cal /g-C   * 100 g * (100- 25 C) = 7500 cal = 7.5 kcal

The amount of heat energy necessary to raise the temperature of 100 g of water at room temperature (25°C) to the boiling point (100°C) is 7.5 kcal.

Given to us the mass of water, the specific heat of water, and the change in temperature, we need to calculate the amount of heat energy.

m = 100 g

c = 1.0 cal/g°C

ΔT = (100 °C - 25 °C) = 75 °C

To calculate the amount of heat energy required, we can use the formula:

Q = m × c× ΔT

Where:

Q = heat energy (in calories)

m = mass of water (in grams)

c = specific heat of water (in cal/g°C)

ΔT = change in temperature (in °C)

Substituting the values into the formula:

Q = 100 g × 1.0 cal/g°C × 75 °C

Q = 7500 cal

7500 cal = 7.5 kcal

Therefore, the amount of heat energy required to raise the temperature of 100 g of water from 25 °C to 100 °C is 7500 calories, which is equivalent to 7.5 kcal.

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Answer:

0.07

Explanation:

to find mole you divide mass by the relative atomic mass

Now you find the relative atomic of of moles pf he number sodium sulfide

then you thequation for finding moles to find mole of sodium

Answer:

The answer would be B, PC13

Explanation:

Answer:

B: PC13

Explanation:

The percent yield of methane is 85.5%.

The percent yield of a reaction is the ratio of the actual yield and the expected yield expressed as a percentage.

Equation of reaction is given below:

1 mole of methane produces 2 moles of water

16 g of methane produces 36 grams of water

52 g of methane will produce 117 g of water

Percent yield = 100/117 × 100% = 85.5%

Therefore, the percent yield of methane is 85.5%.

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Taking into account the reaction stoichiometry, 7 moles of water will be produced if 3.5 moles of sulfuric acid reacts.

In first place, the balanced reaction is:

H₂SO4 + 2 NH₂OH → 2 H₂O + (NH₄)₂SO₄

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The following rule of three can be applied: If by stoichiometry of the reaction 1 mole of sulfuric acid produces 2 moles of water, 3.5 moles of sulfuric acid produces how many moles of water?

[tex]moles of water=\frac{3.5 moles of sulfuric acidx2 moles of water}{1 mole of sulfuric acid}[/tex]

moles of water= 7 moles

Then, 7 moles of water will be produced if 3.5 moles of sulfuric acid reacts.

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Answer: i don't know what you mean by control  but if you mean what will happen is the balloon if he rubs it on his head and not his clothes electrons move from the atoms and molecules in his hair onto the balloon and since electrons have a negative charge the balloon will become negatively charged and his hair will become positively charged.

Answer: the ballon that was not rubbed with cloth

Explanation: