How many grams of the bromate is formed when 15.0 grams of aluminum react with excess bromic acid?

The concentration of the HCl solution needed to neutralise NaOH is 0.0432M

Neutralization is a chemical reaction in which acid and base react to form salt and water. Hydrogen (H⁺) ions and hydroxide (OH⁻ ions) react with each other to form water.

The strong acid and strong base neutralization have a pH value of 7.

The beaker gets warm which indicates that the reaction between acid and base is an exothermic reaction releasing heat energy into the surroundings.

Given,

Volume of NaOH = 54ml

Concentration of NaOH = 0.1 M

Volume of HCl = 125ml

Concentration of NaOH × Volume of NaOH = Concentration of HCl × volume of HCl

0.1 × 0.054 = Concentration of HCl × 0.125

Concentration of HCl = 0.0432 M

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Answer:

D

Explanation:

This creates a gap that we call an oceanic trench

:)

Answer:

b no

Explanation:

because it is decomposing into two elements

The enthalpy change for the reaction \(C2H4(g) + H2(g) → C2H6(g)\) is -137.15 kJ/mol.

Given:C2H4(g) + H2(g) → C2H6(g)The enthalpy of formation of C2H6(g) is -84.68 kJ mol-1The enthalpy of formation of C2H4(g) is 52.47 kJ mol-1The enthalpy of formation of H2(g) is 0 kJ mol-1Hence, using Hess's Law, the enthalpy change for the reaction \(C2H4(g) + H2(g) → C2H6(g)\) can be calculated by considering the formation of reactants and products from their respective elements. It can be given as:

\($$C_2H_4 + H_2 → C_2H_6$$$$\Delta H = H_f(C_2H_6) - [H_f(C_2H_4) + H_f(H_2)]$$$$\Delta H = -84.68 - [52.47 + 0]$$$$\Delta H = -84.68 - 52.47$$$$\Delta H = -137.15 kJ/mol$$.\)

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Answer:

one from each parent

Explanation:

First we need to find change in temperature.

\(\boxed{\sf \Delta T=T_f-T_I}\)

\(\\ \sf{:}\implies \Delta T=250-100\)

\(\\ \sf{:}\implies \Delta T=150°C\)

Now

\(\boxed{\sf Q=mc\Delta T}\)

\(\\ \sf{:}\implies Q=125(0.233)(150)\)

\(\\ \bf{:}\!\implies Q=4368.75J\)

Answer:

Following are the response to the given question:

Explanation:

In the given scenario, When the balance has never been tainted before the KHP is weighted, which can affect the molar concentration of NaOH because its molarity is directly proportional to the weight including its substance. In this question it is the mistake is systemic because it may be corrected by modifying balancing parameters.

First, we have to remember the equation to calculate the heat of evaporation:

Q is the heat, ΔH is the vaporization heat of the substance, and m is the mass.

If we have the vaporation heat in terms of moles (as in this case), we have to multiply it by the number of moles instead of the mass. For that purpose, we have to calculate the molecular weight of the water:

Then, we can pass the grams to moles:

And we can finally calculate the heat:

The answer is that the necessary heat to evaporate the water is 63.9894 kJ approx.

Answer:

false

Explanation:

Answer:

What mass of sodium hydroxide is needed to react completely with 10.0 g of iron( III) chloride? The conversion sequence is: A. B.

Explanation:

make me as brain liest

Answer:

Option C. The same number of energy levels.

Explanation:

From the diagram given above, element (i) belong to group 2 while element (ii) belong to group 6.

Also, both element i and ii belong to the same period (i.e period 4). This simply means that both element i and ii have the same number of energy levels.

NOTE: Elements in the same period have the same number of shells of electrons which simply means they have the same energy levels.

Answer:

1.1328 g left after 15.6 years

Explanation:

First we need to find, that how many times it decays: 15.6 ÷ 2.60 = 6 times

Then we know the formula: mass of original ÷ 2^n = remaining mass.

                                           :     72.5   ÷   2^6 = 1.1328 g left.

Answer:

remaining mass = 1.13 grams (3-sig figs)

Explanation:

All radioactive decay follows 1st order kinetics and is defined by the expression ...

A = A₀e^⁻kt

A = final mass activity

A₀ = initial mass activity

k = rate constant = 0.693/t(half-life) = 0.693/2.60 yrs = 0.2665 yrs⁻¹

t = time of decay = 15.6 yrs

A = (72.5 g)(e^[-(0.2665 yrs⁻¹)(15.6yrs)] = 72.5 grams x 0.0156

= 1.13381331 grams (calc. ans.) ≅ 1.13 grams (3 sig figs)

As a result, the container's partial pressure of Hydogen is 163.2 torr.

The partial pressures of the individual gases make up the total pressure of the gas combination. The total number of moles in the gas mixture, or ntot, is equal to the sum of all ni. Ptot = Pi = P1 + P2 + P3...

Calculating the total moles of gas in the container is the first step.

n(total) = n(H2) + n(O2) + n(SO2)

= 0.40 mol + 0.80 mol + 0.80 mol

= 2.0 mol

Next, we need to use the mole fraction of H2 to calculate its partial pressure:

X(H2) = n(H2) / n(total)

= 0.40 mol / 2.0 mol

= 0.20

The mole fraction of H2 is 0.20, so we can use this to find the partial pressure of H2:

P(H2) = X(H2) x P(total)

= 0.20 x 816 torr

= 163.2 torr.

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The mass of sulfur dioxide required is approximately 6.36 grams.

To determine the number of grams of sulfur dioxide (SO2) required to exert a pressure of 0.705 atm in a 2.50L tank at 0 °C, we can use the ideal gas law equation: PV = nRT.

First, we need to convert the temperature from Celsius to Kelvin by adding 273.15, so the temperature becomes 273.15 K. The ideal gas constant (R) is 0.0821 L·atm/(mol·K).Rearranging the ideal gas law equation to solve for the number of moles (n), we get n = PV / RT.

Plugging in the given values, n = (0.705 atm) * (2.50 L) / [(0.0821 L·atm/(mol·K)) * (273.15 K)]. Calculating this expression, we find that n is approximately 0.0993 moles.The molar mass of sulfur dioxide is 64.06 g/mol (32.06 g/mol for sulfur + 2 * 16.00 g/mol for oxygen).

Finally, we can calculate the mass of sulfur dioxide using the formula: mass = n * molar mass = 0.0993 moles * 64.06 g/mol. Thus, the mass of sulfur dioxide required is approximately 6.36 grams.

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Answer:

66 grams of ice would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C.

Explanation:

To calculate the amount of ice that would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C, we need to use the formula:

Q = m_water * c_water * ΔT_water + m_ice * Lf

where,
Q = the amount of heat transferred,
m_water = the mass of water, c_water is the specific heat capacity of water,
ΔT_water = the change in temperature of water, m_ice = the mass of ice,
Lf = the specific latent heat of fusion of ice.

First, let's calculate the amount of heat transferred to the water:

Q = m_water * c_water * ΔT_water
Q = 352 g * 1.0 cal/(g*°C) * (15-0) °C
Q = 5,280 cal

Next, we can use the specific latent heat of fusion of ice, which is 80 cal/g, to calculate the amount of heat required to melt the ice:

Q = m_ice * Lf
Q = m_ice * 80 cal/g
m_ice = Q / Lf
m_ice = 5,280 cal / 80 cal/g
m_ice = 66 g

Answer:

k20

Explanation:

potassium oxide

hope this helped

Answer:

solider liquid and gas plasma

Explanation:

in physical a state of matter is one of the distant form in which matter can exist four states of matter are observable in everyday life solid liquid and gas and plasma. hope it helps

In physics, a state of matter is one of the distinct forms in which matter can exist. Four states of matter are observable in everyday life: solid, liquid, gas, and plasma.

The [OH-] in a solution that is 0.200 M in NaF. Ka for HF is 6.7 x 10^-4 is 1.73 x 10⁻⁶M . Therefore, option C is correct.

Any mixture of one or more solutes that have been dissolved in a solvent is referred to as a solution. To create a homogenous mixture, a solute must dissolve in a solvent. To create a homogenous mixture, a solute must dissolve in a solvent.

A particular kind of homogenous mixture made up of two or more substances is known as a solution. A solute is a substance that has been dissolved in a solvent, which is the other substance in the mixture.

Given that,

0.200M NaF → 0.200M Na⁺(aq) + 0.200M F⁻(aq)

Na⁺ + H₂O → no reaction  because sodium ion will not hydrolyze to form weak electrolyte

F⁻ + H₂O → HF + OH⁻ ( F⁻ hydrolyzes in water to form weak acid HF )

Now, Analysis:

                 F⁻        +    H₂O   →     HF     +      OH⁻

C ( i ):      0.200M         -------         0.00M       0.00M

ΔC :          -x                 -------            +x              +x

C ( eq ) : 0.200-x            -------              x                x

        ~0.200M

Kb = Kw/Ka(HF) = [HF][OH⁻]/[F⁻]

= x²/ ( 0.200 )

= 1x10⁻¹⁴/6.7x10⁻⁴

x = [HF] = [OH⁻]

= √(0.200)(1x10⁻¹⁴)/(6.7x10⁻⁴)

= 1.73 x 10⁻⁶M in OH⁻ ions.

Thus, option C is correct.

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Explanation:

is there a difference in speed between cooling down and warming up ?

so, when will both reach room temperature ? relatively at the same rate (I assume the hot milk is further from room temperature than the cold milk) ? or maybe even absolutely at the same time ?

Answer:

Explanation:

Here, we want to draw an organic molecule with the given details

The main chain being heptane means there are 7 carbon atoms on the main chain. We can have the attachments on any of the carbon atoms on the chain with the number of bonds on every carbon atom being 4

We proceed with the diagram as follows:

Answer:

mid ocean ridge

Explanation:

The Microscope part and their right descriptions are as follows

Iris Diaphragm: A. Increases or decreases the light intensity

Objective Lens System: B. After light passes through the specimen, it next enters this lens system

Stage: C. Platform that supports a microscope slide

Adjustment Knob: D. Causes stage (or objective lens) to move upward or downward

Condenser: E. Concentrates light onto the specimen

Other parts of a microscope and their description that you should know about includes;

Eyepiece - The lens that you look through to see the image of the specimen.

Body tube - The tube that connects the eyepiece to the objective lenses.

Arm - The part of the microscope that supports the body tube and connects it to the base.

Base - The part of the microscope that supports the arm and provides stability.

Illuminator - The light source that provides light for the microscope.

Stage clips - The clips that hold the microscope slide in place on the stage.

Revolving nosepiece - The part of the microscope that holds the objective lenses and allows them to be rotated into place.

The above answer is in response to the full question below;

Match the names of the microscope parts in column A with the descriptions in column B. Place the letter of your choice in the space provided.

1. Iris diaphram

2. Objective lens system

3. Stage

4. Adjustment knob

5. Condenser

Increases or decreases the light intensity

2. After light passes through the specimen, it next enters this lens system

3. Platform that supports a microscope slide

4. Causes stage (or objective lens) to move upward or downward

5. Concentrates light onto the specimen

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The type of rocks formed by the process of heating, cooling, and pressure  combining  the minerals pyrite and talc into a rock.

Most metamorphic rocks are created when preexisting rocks are altered by heat, pressure, or chemically reactive fluids (Figure 8.2). Protoliths are the antecedent rocks, or parent rocks. Protoliths can be any type of rock, including igneous, sedimentary, or metamorphic rock.

The changes that take place during metamorphism might affect the minerals present, the texture of the rock, and even the overall composition of the rock.

Because pressure and temperature in the Earth's interior rise with depth, regional metamorphism happens. The amount of metamorphism increases with rock depth.

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Answer:

silicon 0.712 J/g°C

Explanation:

i hope this helps you, sorry if im wrong, but this should be correct!

Answer:

.7109  j / gm-C

Explanation:

Specific heat =  j/gm-C

j = 2110     gm = 44.7     C = ( 89.6-23.2) = 66.4

2110 /(44.7 * 66.4) = .7109   j/gm-C

The waves that  has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.

A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.

Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.

Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.

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An example of a water erosion model is the "Water Erosion Prediction Project (WEPP)" model.

It is a process-based model that simulates the effects of rain and snowmelt on soil erosion, runoff, and water quality. The model considers various factors such as slope, soil type, vegetation, and rainfall intensity to predict the erosion and sediment yield of a specific landscape.

The results of the model can be used for planning and management purposes, such as developing best management practices for controlling erosion and improving water quality.

Wind and water erosion have severely deteriorated loessial soils across the planet. Erosion causes the loss of topsoil and soil nutrients, both of which have a detrimental impact on production and the human population.

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According to the given statement Requirement of high temperature for fusion reactions.

The correct option is D.

In a fusion reaction, two light nuclei combine to form a heavier nucleus. The process results in the production of energy because the mass of the single nucleus that forms is less than the sum of the masses of the two original nuclei. Remaining mass is converted to energy.

The core temperature of the sun, for instance, is about 15 million degrees Celsius. At this temperature and very high pressure, two hydrogen isotopes, Deuterium and Tritium, combine to make Helium, and a huge amount of energy is released in the form of heat.

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The given question is incomplete.

The complete question is:

When methane is burned with oxygen, the products are carbon dioxide and water. If you produce 9 grams of water and 11 grams of carbon dioxide from 16 grams of oxygen, how many grams of methane were needed for the reaction?

Answer: 4 grams of methane were needed for the reaction

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

{tex]CH_4+2O_2\rightarrow CO_2+H_2O\)

Given:  mass of oxygen = 16 g

Mass of carbon dioxide = 11 g

Mass of water = 9 g

Mass of products = Mass of carbon dioxide + mass of water = 11 g  +9 g = 20 g

Mass or reactant = mass of methane + mass of oxygen = mass of methane + 16 g

As mass of reactants = mass of products

mass of methane + 16 g= 20 g

mass of methane  = 4 g

Thus 4 grams of methane were needed for the reaction

Answer:

major ecological grouping of plants and animals

food chain

*biome*

bacteria and fungi that break down dead matter

*decomposers*

a state of change in which the end result is equal or

balanced

*dynamic equilibrium*

the basic relationships that show how a community of plants,

animals, and bacteria live and grow and how these living

*ecosystem*

things are dependent on each other as well as the Sun, soil,

and other nonliving parts of their environment; a cycle of

relationships

line of plants and animals that shows the order in which

*Food chain*

organisms are eaten

a condition or conditions of the nonliving surroundings, such

*environmental factor*

Explanation: