I need help with these 7 questions ASAP pls

Answer:

City Hall - directs necessary activities throughout the city

Explanation:

Answer:

Town Hall,

Explanation:

Answer:

d. The acid is likely to eat through the can.

Explanation:

Aluminium is a metallic element found in group 3 of the periodic table. Aluminum is a very reactive metal owing to the fact that it reacts with almost every substance it comes in contact with e.g air, acids, bases etc.

In this question where Derek stores his Hydrochloric acid (HCl) remnant, after an experiment, into a can made of aluminum. What will happen is that the acid is likely going to eat through the can. This might occur gradually but will eventually. Aluminum protects itself from further reactions by forming a layer of Aluminum oxide (Al2O3) when it reacts with air.

This is what keeps the reaction with HCl gradual but the acid will eventually permeate the layer and corrode the aluminum can by reacting with the aluminum.

Answer:

B

Explanation:

You prioritize the bromo group and then name the alkyl substituents accordingly (and also in the correct alphabetical order)

B. 1-bromo-2-ethyl-3-methylbenzene is the aromatic hydrocarbon

CH3 CH2CH3Br.

Traditionally, benzene-like substances have been called aromatic hydrocarbons due to the fact that they had unique aromas. Today, aromatic compounds include any that incorporate a benzene ring or have the residences we accomplice with this group of compounds.

Aromatic compounds, additionally known as "mono- and polycyclic aromatic hydrocarbons", are natural compounds containing one or extra fragrant earrings. The discern member is benzene. Heteroarenes are carefully related, considering the fact that as a minimum one carbon atom of CH organization is changed through one of the heteroatoms oxygen, nitrogen, or sulfur.

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Answer:

⇒ n = 2.4088 × 10²⁴

- So, the no of atoms in 4 moles of helium is 2.4088 × 10²⁴.

Explanation:

The percentage by mass of acetic acid is 5.14%

What is percentage by mass?

It is defined as ratio of mass of substance to the mass of all substance multiply by 100.It is way to express concentration.

CH3COOH+NaOH= CH3COONa+H2O

we have 1 mole of acid for 1mole of base

Now , C=n/V

C= 0.299M ( its M not m so correct question)

V= 24.5 mL

no of moles = 0.299moles/L × 0.0245 L = 0.00733 moles

for neutralization of 0.00733 moles of Noah require 0.00733 moles  of CH3COOH

given mass of acetic acid = no. of moles × molar mass

0.00733×60g/mole = 0.4398g

% mass of acetic acid =[ 0.4398g/8.55g]×100

⇒ 5.14%

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Answer:

1. It is stoichiometric.

2. O2 is the limiting reactant.

3. 9.0 g of C2H6 remain unreacted.

4. 17.6 g of CO2.

5. 85.2%.

Explanation:

Hello there!

In this case, for the given chemical reaction:

\(2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O\)

We can see that:

1. It is stoichiometric and is balanced because the reactants yields the products according to the law of conservation of mass.

2. In this part, it is possible to calculate the moles of ethane by using its molar mass:

\(n_{C_2H_6}=15g*\frac{1molC_2H_6}{30.08g} =0.50molC_2H_6\)

And the moles of oxygen by knowing that one mole is contained in 22.4 L at STP:

\(n_{O_2}=\frac{1mol}{22.4L} *15.68L=0.7molO_2\)

Thus, by calculating the moles of carbon dioxide product by each reactant, we can identify the limiting one:

\(n_{CO_2}^{by\ C_2H_6}=0.50molC_2H_6*\frac{4molCO_2}{2molC_2H_6} =1.0molCO_2\\\\n_{CO_2}^{by\ O_2}=0.70molO_2*\frac{4molCO_2}{7molO_2} =0.4molCO_2\\\)

Thus, since oxygen yields the fewest moles of CO2 product, we infer it is the limiting reactant.

3. In this part, we calculate the mass of C2H6 that actually react first:

\(m_{C_2H_6}^{reacted}=0.4molCO_2*\frac{2molC_2H_6}{4molCO_2}*\frac{30.08gC_2H_6}{1molC_2H_6} =6.0gC_2H_6\)

Thus, the leftover of ethane (C2H6) as the excess reactant is:

\(m_{C_2H_6 }^{leftover}=15g-6.0g=9.0g6.0C_2H_6\)

4. Since 0.4 moles of carbon dioxide were produced, we use its molar mass to calculate the mass as its theoretical yield:

\(m_{O_2}^{theoretical}=0.4molCO_2*\frac{44gCO_2}{1molCO_2}=17.6gCO_2\)

5. Finally, the percent yield is gotten by dividing the actual yield by the theoretical one:

\(Y=\frac{15g}{17.6}*100\%\\\\Y=85.2\%\)

Best regards!

Answer:

5.55 moles is the answer ....

Explanation:

if 18g H2O is equal to 1 mole then 100 g H2O is how much?

100/18 which is 5.55

Answer:

5.551

Explanation:

100.0g x 1mol H20/18.015g H20 = 5.551 moles of H20

The 18.015g is from the periodic table. H = 1.008x2 = 2.016g H2

0= 15.999

15.999 + 2.016= 18.015

The electronegativity periodic table is a chart that arranges elements according to their electronegativity, which is a measure of an atom's ability to attract electrons to itself. Electronegativity is a chemical property that reflects the relative tendency of an atom to draw electrons towards itself when it forms a chemical bond with another atom.

The electronegativity values are usually determined using the Pauling scale, which was developed by Linus Pauling and is widely used in chemistry. In this scale, the electronegativity of an element ranges from 0.7 for cesium to 4.0 for fluorine, with increasing electronegativity moving from left to right across a period and increasing as one moves down a group.

The electronegativity values can be useful in understanding chemical bonding and the behavior of molecules. For example, elements with high electronegativity values tend to form ionic bonds, while elements with low electronegativity values tend to form covalent bonds. Additionally, the electronegativity difference between two bonded atoms determines the type of bond, with larger differences indicating polar covalent bonds and smaller differences indicating nonpolar covalent bonds.

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The question requires us to choose the best option to explain why bubbles rise faster from a warm can of soda than a cold can, based on the solubility of gases in liquids.

Adding heat to a solution composed of a liquid and a gas (i.e., increasing its temperature) provides thermal energy to the gas that makes it possible to overcome the forces that maintain molecules of solvent (liquid) and solute (gas) together. In this way, the molecules of solvent and solute tend to separate, therefore decreasing the solubility of the gas. Based on this, we can say that the solubility of gases in liquids increase with increasing temperature.

Therefore, the best option to answer the question is the first one, "gases become less soluble in liquids at higher temperatures".

Answer:

The Temperature will Increase, and the fire will Blow

Explanation:

I hope I could help

Answer:

lilpeep66661

Explanation:

add me i play

Answer:

See below!

Explanation:

Chlorine is very electronegative, meaning that it will pull electrons, or negativity toward itself.  When it pulls the negativity towards itself, the chlorine becomes partially negative and the carbon becomes partially positive.  Because of this, the compound is polar.

Answer:

unclear what your question is

Explanation:

forces cannot be equal, the box will not move, the box cannot weigh more than the force being pushed upon it if the force pushing on the box has more force, then the box will movw

The Von Thunen Model, which explains agricultural land use patterns based on proximity to market centers, has undergone changes due to improvements in transportation. These changes have led to a reduction in the influence of distance to market as a determining factor in land use decisions.

The Von Thunen Model, developed in the early 19th century, suggested that the intensity and type of agricultural land use would be determined by the distance to market. However, improvements in transportation, such as the development of roads, railways, and refrigerated transportation, have significantly reduced the impact of distance on land use decisions. With faster and more efficient transportation systems, farmers can now transport their goods over longer distances without incurring excessive costs. This has resulted in a decrease in the relative importance of proximity to market centers in determining land use patterns.

As a result of transportation advancements, agricultural activities have become less restricted by distance to market centers. Farmers now have the flexibility to engage in specialized or high-value crops that may require access to specific resources rather than solely relying on proximity to markets. Additionally, the availability of transportation options allows for greater integration of regional and global markets, leading to changes in crop selection, production techniques, and market strategies. Therefore, improvements in transportation have transformed the Von Thunen Model by diminishing the influence of distance to market and encouraging more diverse and efficient land use patterns in agricultural systems.

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The part of the third step when using stoichiometry to go from grams of a reactant to grams of a product is Mole ratio (option A).

Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

Stoichiometric problems involving reactants mass to products mass can be solved in four simple steps:

This suggests that the third step when using stoichiometry to calculate grams of a reactant or grams of a product is to find the mole ratio.

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Answer:

 To anyone who's wondering, the fourth step is

      D. Molar mass of product

(I just took the test and got it right).

Explanation:

Answer: [Ar] 4s² 3d¹⁰ 4p⁵

Explanation: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5

The volume of 22.4 g of bromine with a density of 3.10 g/ml is  7.22 mL.

A species' density is a physical characteristic that can be assessed by calculating its mass and volume. Mathematically dividing the mass by the volume yields the density.

As shown below, the density and mass of a sample determine the volume occupied by a particular substance.

ρ = m/V

Here, the mass is m, the volume is V, and the density is.

Utilizing the matter's mass and volume, the aforementioned formula determines the matter's density (occupied by the matter).

density = 3.10

mass = 22.4 g

ρ = m/V

3.10 = 22.4/V

V = 22.4/3.10

V = 7.22 mL

Therefore, The volume of 22.4 g of bromine with a density of 3.10 g/ml is  7.22 mL.

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Answer:

it is an endothermic reaction

Explanation:

This is because there is a rise in temperature from 20 to 46. this means that the reaction takes in heat from the suuroundings

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Out of the given statements, only statements " a spontaneous process can do work." and "if a process is spontaneous at one temperature it will be spontaneous at all temperatures" are true.

Statement iii is true because a spontaneous process releases energy that can be harnessed to do work. For example, a waterfall is a spontaneous process that releases energy that can be used to turn turbines and generate electricity.

Statement iv is true because the spontaneity of a process depends on the change in Gibbs free energy (∆G) and the temperature. If a process is spontaneous (∆G is negative) at one temperature, then it will be spontaneous at all temperatures below that temperature. However, if the process is not spontaneous (∆G is positive) at a certain temperature, increasing the temperature may make it spontaneous by increasing the entropy term in the Gibbs free energy equation.

A spontaneous process can do work and its spontaneity depends on the change in Gibbs free energy and temperature. However, a spontaneous process is not necessarily reversible or at equilibrium.

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The incorrect statement about the setup of a voltaic cell is (d) "In voltaic cells, oxidation occurs at the cathode and reduction occurs at the anode."

In a voltaic cell, oxidation actually occurs at the anode and reduction occurs at the cathode. This is because electrons flow from the anode (where oxidation takes place) to the cathode (where reduction takes place). The anode is the electrode where oxidation reactions take place and electrons are released, while the cathode is the electrode where reduction reactions occur and electrons are gained. To explain further, in a voltaic cell, the anode is the electrode where the oxidation half-reaction occurs. Oxidation involves the loss of electrons and the anode serves as the source of electrons. These electrons then flow through an external circuit to the cathode. At the cathode, reduction takes place, which involves the gain of electrons. The cathode acts as the site where reduction half-reactions occur, consuming the electrons that flow from the anode. Therefore, the correct statement should be: "In voltaic cells, oxidation occurs at the anode and reduction occurs at the cathode."

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ANSWER

EXPLANATION

Given that;

Follow the steps below to find the grams of H2SO4

Step 1; Find the number of moles of H2SO4 using the below formula

Recall, that Avogadro's number is 6.02 x 10^23

Step 2; Find the mass of H2SO4 using the formula below

Recall, that the molar mass of 98.079 g/mol

The time of flight of the 86Q+ ion 1.227 x 10⁻⁵ s.

Using the principle of conservation of energy to relate the kinetic energy of the ions to their mass and velocity. Since all of the Q+ ions in the sample have the same kinetic energy:

m₁v₁² = m₂v₂²

where m₁  and m₂ are the masses of two different Q isotopes, and v₁ and v₂ are their corresponding velocities.

Also the formula for the time of flight (TOF) of an ion in a mass spectrometer:

t = d/v

where d is the length of the flight tube, and v is the velocity of the ion.

Combine these two equations to solve for the time of flight of the 86Q+ ion, given the time of flight of the 82Q+ ion:

m₁v₁² = m₂v₂²

v₁ = √(m₂/m₁) × v₂

t₁ = d/v₁

t₂= d/v₂ = d/(√(m₂/m₁) × v₁)

Given that t₁ = 1.243 x 10⁻⁵ s for the 82Q+ ion. Assume that the flight tube length, d, is the same for both ions.

To solve for t₂, we need to find the ratio of the masses of the two isotopes:

m₂/m₁ = 86/82 = 1.0488

Substituting this into the equation for t₂:

t₂ = d/(√(1.0488) × v₁) = (1/√(1.0488)) × t₁

t₂ = (1/√(1.0488)) × (1.243 x 10⁻⁵ s) = 1.227 x 10⁻⁵ s

Therefore, the time of flight of the 86Q+ ion is 1.227 x 10⁻⁵ s.

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To solve for the specific heat of the metal, we can use the formula:

q = mcΔT

where q is the heat gained or lost, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.

First, let's calculate the heat gained by the water:

q_water = mcΔT
= (38.6 g)(4.18 J/g°C)(32.5 - 25.2)°C
= 1,230.8 J

Next, let's calculate the heat lost by the metal:

q_metal = -q_water
= -1,230.8 J

Note that we use a negative sign for q_metal because the metal is losing heat to the water.

Now we can solve for the specific heat of the metal:

q_metal = mcΔT
-1,230.8 J = (45.2 g)c(32.5 - 100.0)°C
c = 0.473 J/g°C

Therefore, the specific heat of the metal is 0.473 J/g°C.

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Answer:

acid jsh just want me there for me too I love her soooooo you know I have no money to go back home from school tomorrow morning at like midnight to go out to my in the to the population and you have to get to know what to tell u what are u

Answer:

Explanation:

Properties of Covalent Molecular Compounds.

Low melting points and boiling points. ...

Low enthalpies of fusion and vaporization These properties are usually one or two orders of magnitude smaller than they are for ionic compounds.

Soft or brittle solid forms. ...

Poor electrical and thermal conductivity.

soft and brittle

bad thermal conductivity

etc.

there's a list just search what you are looking for

The three states of matter are solid - example is stone, liquid - example is water and gas - example is air.

A matter is referred to as a substance which has a certain mass and takes up a certain volume in space.

For example pen, pencil, toothbrush, water, milk are matters as well as car, bus, bicycle is also a matter. So matter is considered as a living thing and a non-living thing.

There are three states of matter and they include;

They have different properties, which can be explained by looking at the arrangement of their particles. This is the theoretical temperature at which particles have the least amount of energy and the slowest movement.

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