assume that your experimental mass percentage of copper was 38.92%. compared to the theoretical mass percent of copper in copper(ii) sulfate pentahydrate, was the experimental mass percent higher, lower, the same as, or unable to be determined? lower higher same cannot be determined

Answer:

Some animals use echos for communication, Wolves listen to each others howls with echos to find each other if they ever get seperated.

Explanation:

Your welcom :)

Answer: 280 g

Explanation:

The only piece of information we can deduce from the number "9" about a Fluorine atom is its atomic number.

Fluorine is an element with the atomic symbol F and the number 9. It is found in group 17 (group VIIa), at the top of the halogen family, on the opposite side of Oxygen and Neon. The lightest, riskiest, and most reactive of all the halogens is fluorine, which is positioned above chlorine on the periodic table.

With an electronegativity of 3.98, the fluorine atom is the most electronegative element in the periodic table. Its electron configuration is [He] 2s²2p⁵, or 1s²2s²2p⁵. It is extremely challenging to isolate and will ferociously shred an electron off practically any other atom.

Seven valence electrons make up fluorine. It is particularly reactive and electronegative because it only requires one more electron to complete its second shell.

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Answer:

10.01461 kilojoules of thermal energy are absorbed when 98.5 g of water is heated from 24.5 ° C to 48.8 ° C

Explanation:

Sensible heat is the amount of heat that a body absorbs or releases without any changes in its physical state (phase change) causing a change in temperature.

The equation that allows to calculate heat exchanges in this case is:

Q = c * m * ΔT

where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT is the change in temperature.

In this case:

Replacing:

Q= 4.184 \(\frac{J}{g*C}\) *98.5 g* 24.3 °C

Solving:

Q=10,014.61 J

Since 1 J is equal to 0.001 kJ, then you can apply the following rule of three: if 1 J is equal to 0.001 kJ, then 10,014.61 J is equal to how many kJ?

\(kJ=\frac{10,014.71 J*0.001 kJ}{1 J}\)

kJ=10.01461 kJ

10.01461 kilojoules of thermal energy are absorbed when 98.5 g of water is heated from 24.5 ° C to 48.8 ° C

In the electrophilic aromatic substitution reaction between benzaldehyde and Br2 in the presence of FeBr3, the first step involves the generation of a carbocation intermediate. This carbocation is formed when the bromine molecule attacks the benzene ring, displacing a proton.

Since benzaldehyde is a meta-director, the carbocation intermediate will be stabilized through resonance. The resonance structures can be represented as follows:

Structure 1:

      Br

       |

Ph-C(+)-H

       |

Structure 2:

      Br

       |

Ph-C-H

  |    |

  +    Ph

Structure 3:

      Br

       |

Ph-C-H

  |    |

Ph    +

In these resonance structures, the positive charge of the carbocation is delocalized throughout the benzene ring. The presence of the electron-withdrawing aldehyde group (CHO) in benzaldehyde directs the incoming bromine atom to the meta position relative to the aldehyde group.

Please note that it's always recommended to consult reliable sources and appropriate references for accurate structural representations.

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Answer:

kylee is the best

Explanation:

Answer:

2.05

Explanation:

Answer:15 g KCl

Explanation: 2KClO3->2KCI+3O2

Answer:

Products have less potential energy than reactants.

Explanation:

Let's remember the concept of an exothermic reaction: a chemical reaction or physical change is exothermic if heat is released by the system into the surroundings. Because the surroundings are gaining heat from the system, the temperature of the surroundings increases.

Now, let's see how looks a potential energy diagram for an exothermic reaction:

This represents that the products have less potential energy than reactants.

The weight of 1.00 liter of mercury is 13600 grams or 13.6 kg.

Given,

The density of mercury is 13.6 g/ml.

Let us calculate the mass of 1.00 liter of mercury.

1 liter = 1000 ml

Therefore, the mass of 1000 ml of mercury = 13.6 * 1000 = 13600 grams or 13.6 kg

The weight of 1.00 liter of mercury is 13600 grams or 13.6 kg.

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Calcium is a exceptionally reactive steel that reacts violently in a much less way with water. When calcium reacts with water, it has a tendency to displace hydrogen from the water.

Along with this, it produces bubbles of hydrogen fueloline in addition to calcium hydroxide. Therefore, an appropriate choice to this query is (D) (iii) and (iv).This is a binary compound and it's far an ionic compound, that is polar ionic compounds which might be polar in nature need to be quite simply soluble in water, however this calcium sulfide is stated to be insoluble in water. So the motives for that is for an ionic compound, that is collar to be soluble.

The calcium carbonate will dissolve withinside the acid generating CO2 fueloline. It will now no longer dissolve in natural water.If CaS had been to dissolve, AH could be high-quality due to the fact the ion-dipole interactions are very vulnerable as compared to the ion-ion interactions being overcome.

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The element which X represents in the given graphic is Carbon

From the question, we are to determine the element in which X represents

Comparing the given graphic with the atomic notation shown in the attachment, X has a mass number of 12 and an atomic number of 6

The element which has a mass number of 12 and an atomic number of 6 is Carbon.

Hence, the element which X represents in the given graphic is Carbon.

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An increase in government spending primarily shifts aggregate demand to the right.

Government spending refers to the amount of money that a government allocates for various purposes such as infrastructure development, social welfare programs, defense, and public services. When there is an increase in government spending, it has a direct impact on aggregate demand in an economy.

Aggregate demand represents the total amount of goods and services that households, businesses, and the government are willing and able to purchase at a given price level. Government spending is a component of aggregate demand, and an increase in government spending means that the government is injecting more money into the economy to purchase goods and services.

This increase in government spending has a multiplier effect. It stimulates economic activity by increasing demand for goods and services, which in turn leads to an increase in production and employment. As a result, aggregate demand shifts to the right, indicating higher levels of overall spending in the economy.

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Answer:

The Oxygen atoms in iron oxide have more mass than the iron atoms in pure iron

Explanation:

When iron rusts and forms iron oxide, the iron oxide has more mass than the iron because the iron atoms in iron oxide have more mass than pure iron.

Pure iron contains only iron atoms and nothing else. It is a pure substance.

Iron has an atomic mass of 56 while oxygen has an atomic mass of 16. It follows that iron has a greater mass than oxygen.

However, in iron oxide, iron combines with oxygen to form Fe2O3. There are two iron atoms and three oxygen atoms in Fe2O3.

Three oxygen atoms have a total mass of 48g while two iron atoms has a total mass of 112g.

It the follows that, when iron rusts and forms iron oxide, the iron oxide has more mass than the iron because the iron atoms in iron oxide have more mass than pure iron.

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The molecular formula is the representation of the number of atoms and the chemical species of the elements. The molecular formula of the compound is \(\rm C_{3}H_{8}O_{1}.\)

A molecular formula depicts the chemical symbols of the atoms of the elements with the subscripts of the number of atoms present in the compound or the molecule.

Given,

Molecular weight of the compound = 60.10 amu

Empirical formula = \(\rm C_{3}H_{8}O\)

Molar mass of carbon = 12.01 g/mole

Molar mass of oxygen = 15.99 g/mole

Molar mass of hydrogen = 1.01 g/mole

Calculate the empirical mass as:

\(\begin{aligned}\text{Empirical mass of}\; \rm C_{3}H_{8}O &= (3 \times 12.01)+(8 \times 1.01)+(1\times 15.99)\\\\&= 60.1\end{aligned}\)

The molecular formula can be calculated as,

\(\begin{aligned}\text{ Molecular formula} &=\dfrac{\text{Molecular weight}}{\text{Empirical mass}}\\\\&= \dfrac{60.10}{60.1}\\\\&= 1\end{aligned}\)

The molecular formula of the compound can be given by multiplying the subscripts of the empirical formula by 1.

Thus, the molecular formula of the compound is \(\rm C_{3}H_{8}O_{1}.\)

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Answer:

A, B, D, E

Explanation:

did it on edg

Answer:

A. Making laundry detergent

B. Making dish detergent

D. De-hairing hides

E. Making paper

Explanation:

Answer:

D

Explanation:

D is the correct answer

Lavoisier believed in the caloric theory.

Caloric was a self-repelling fragment that adhered to matter. The heat was a mysterious fluid stored in the matter and liberate during burning and chemical reactions. Heat walk to cold. Hot objects had caloric and cold had little caloric.

The caloric theory is a disused scientific theory that heat consists of a self-resistant fluid called caloric that flows from hotter bodies to colder bodies. Caloric was also the notion of a weightless gas that could pass in and out of pores in solids and liquids.

So we can conclude that Caloric theory The caloric theory is an outworn scientific theory that heat consists of a fluid called caloric.

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The law of conservation of mass is directly represented in a balanced chemical equation.

In chemistry, the law of conservation of mass says that in a closed or isolated system, matter cannot be created or destroyed in a chemical reaction.

For example: If we burn wood, the mass of ashes and gases is equal to the mass of wood before burning.

Thus, the Law of conservation of mass represent a balanced chemical equation.

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As a result, 1.5 moles of glycerol absorb about 1.99 Joules of heat when their temperature rises from 25 to 70 degrees Celsius.

Glycerin is a straightforward polymer. The molecular formula of this solvent is C3H8O3. It is sometimes referred to as glycerine or glycerol.

We can use the following formula to determine how much heat 1.5 moles of glycerol absorbed: q = n × C × ΔT

Glycerol has a specific heat capacity of 2.43 J/g°C. This needs to be divided by the molar mass of glycerol in order to be converted to Joules per mole per degree Celsius:

C = (2.43 J/g°C) / (92.09 g/mol)

C = 0.0264 J/mol°C

The change in temperature can then be calculated as follows:

ΔT = (70°C - 25°C) = 45°C

We can now enter the values into the formula as follows:

q = (1.5 mol) × (0.0264 J/mol°C) × (45°C)

q = 1.99 J

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Depending on the chemical, these longer-term health effects might include:

Answer:

leading zeroes to the left of a decimal point. and trailing zeros to the left of an invisible decimal point.

Explanation:

Answer: B. C and A.

Explanation:

Answer:

2.5

Explanation:

The spatial, temporal, and seasonal distribution of rainfall is referred to as a rainfall pattern. More rain falls in the tropics than in deserts.

Rain does not fall in colder places, such as the poles, since it is converted to snow before it reaches the ground. Mountain barriers have a substantial impact on air mass modification. and the distribution of precipitation is influenced by topography. Rising air on Hawaii's Big Island causes the leeward side of the mountains to be dry while the windward side is covered with rain.

The Orographic Effect is what we refer to as. The modification of air masses is significantly influenced by mountain barriers, and the distribution of precipitation is influenced by topography. Rising air on Hawaii's Big Island causes the leeward side of the mountains to be dry while the windward side is covered with rain.

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Water is a polar substance. Polar solvents dissolve polar substances. Now, the bond between carbon and hydrogen is a covalent bond, because the electronegativity difference between these two elements is less than 1.7.

Therefore, the low solubility of hexane is due to the fact that hexane is nonpolar with covalent bonds.

Answer: C) Nonpolar covalent

Answer:

cant see it

Explanation:

Answer:

I think it is A

Explanation:

A.They study how to make plants produce certain chemicals