The initial temperature of a balloon is 25 degrees Celsius. This is K.

How hot will a 2.3 L balloon have to get to expand to a volume of 4.6 L? K , or
Celsius.

Answer:

Explanation:

In all, an estimated 8,000 to 10,000 Iraqi forces were killed, in comparison with only 300 coalition troops. Though the Gulf War was recognized as a decisive victory for the coalition, Kuwait and Iraq suffered enormous damage, and Saddam Hussein was not forced from power.

hope this helps a lot!

My classmate's statement in incorrect because plants are also composed of cells.

All living things are composed of cells. A cell is the smallest unit of living organisms. Cells obtain energy via the process of cellular respiration. During cellular respiration, glucose is broken down to yield carbon dioxide and water.

In photosynthesis, carbon dioxide and water are combined to form glucose. The two processes are opposites of each other. Plants produce their own food via photosynthesis. Since plants are composed of cells, plant cells also undergo cellular respiration therefore my classmate's statement in incorrect.

Learn more: https://brainly.com/question/11324711

Answer:

x/2

Explanation:

X = 2 molecules of H2

For 2 molecules of H2, there's only 1 molecule of O2. Meaning, there's twice the amount of H2, so O2 = x/2 molecules.

I hope I'm understanding this question right.

We will convert the volume of the solvent from mL to L, then we will calculate the mass concentration:

We will convert the mass concentration to molar concentration:

Answer: Molarity of MgSO4 is 0.189M.

The amount of carbon dioxide produced by all the idling described in the problem would be 89.6 kg per week.

What is Global Warming?

Global warming refers to the long-term increase in Earth's average surface temperature, primarily caused by human activities such as burning fossil fuels (coal, oil, and natural gas), deforestation, and industrial processes that release large amounts of greenhouse gases into the atmosphere.

Using the atomic masses from the periodic table, we get:

Molar mass of octane = (8 x 12.01 g/mol) + (18 x 1.01 g/mol) = 114.22 g/mol

Since the molecular formula of octane (C8H18) contains 8 carbon atoms, it produces 8 molecules of carbon dioxide (CO2) per molecule of octane during combustion.

So, the amount of carbon dioxide produced by burning 11,200 grams of octane would be:

11,200 g * (8 x 1 mol CO2 / 1 mol octane) = 89,600 g or 89.6 kg of carbon dioxide produced in a week.

Learn more about Global Warming from the given link

https://brainly.com/question/3553382

#SPJ1

Answer:

i think is claim 1

Explanation:

moon jellies eat zooplankton and the zooplankton population increased

Answer:It’s important to know WHY. Great explanations are what makes Brainly awesomeExplain everything. Imagine that the person who was asking, knows nothing at all so you need to start from the very beginningAlways include the steps and/or background required to get to the final answer. Let’s help other people understand and solve future problems on their ownShow all the calculation if it is a numerical question.

Explanation:

Answer:

Crop rotation

Explanation:

The growing of different crops in succession on a piece of land to avoid exhausting the soil and to control weeds,pets,and diseases

Answer:

Chemically speaking, lime refers only to calcium oxide

(CaO); however, in common usage the term includes the calcination products of calcitic and dolomitic limestones. Calcitic (high-calcium) limes are produced by calcination of

calcareous materials (e.g., calcitic limestone, calcite,

oyster shells, and chalk) containing from 95 to 99 percent

calcium carbonate (CaCO^). Dolomitic limes are produced from

dolomitic limestone or dolomite which contains from 30 to ^+0

percent magnesium carbonate (MgCO^), the rest being calcium

carbonate.

At atmospheric pressure, calcite in limestone decomposes

at approximately 900°C to form CaO and COg. The decomposition of dolomite, CaMg is a two-stage process. At

temperatures between 650°C to 750°C dolomite decomposes to

form MgO, CO^ and CaCO^. It is necessary to raise the temperature to 900°C to decompose the CaCO^ (15, 35)» This

phenomenon is extremely important, as is shown later.

Various investigators have studied the effects of stone

size, temperature, and time of calcination of commercial

Explanation:

Answer:

9^3 i think so like 279

Explanation:

blah

Answer:

well 4.2 times 10 is 42 and 6.1 times 10 is 61

Explanation:

The electrons move from left to right through the circle labeled "M" to reach the cathode, where reduction takes place.

If oxidation occurs on the left side of the fuel cell and reduction occurs on the right side, the movement of electrons can be described as follows: Electrons move from left to right through the circle labeled "M."

In a fuel cell, the process of oxidation takes place at the anode (labeled A) where the fuel is oxidized, releasing electrons. These electrons then flow through the external electrical circuit, represented by the wire connecting objects A and B. The electrons reach the cathode (also labeled A) on the right side of the cell, where reduction occurs.The circle labeled "M" represents the membrane or electrolyte in the fuel cell. This membrane allows the transport of ions but blocks the movement of electrons. As a result, electrons cannot flow directly through the electrolyte but must travel through the external circuit.

This movement of electrons through the external circuit is what generates an electric current that can be used to power electrical devices or systems.

for such more questions on reduction

https://brainly.com/question/21851295

#SPJ8

Answer:

1.784 g

Explanation:

The equation of the reaction is;

NaOH(aq) + KHC8H4O4(aq) --------> KNaC8H4O4(aq) + H2O(l)

Number of moles of NaOH reacted = 17.47/1000 * 0.5000 M

Number of moles of NaOH reacted =8.735 * 10^-3 moles

From the reaction equation;

1 mole of NaOH reacted with 1 mole of KHC8H4O4

Hence, 8.735 * 10^-3 moles of NaOH reacts with 8.735 * 10^-3 moles of KHP.

So,

Mass of KHP reacted = 8.735 * 10^-3 moles * 204.2 g/mol = 1.784 g

Answer:

Solvent - water

solute - lemonade powder

Explanation:

You should learn the definitions of al them words. I made them notes in grade 7 dont judge and was bored while studying so i highlited everything and i thought it looked cute back then. We all did that.

If we add more magnesium to the reaction, the reaction speed will increase.

The chemical reaction shown is a single-displacement reaction, also known as a single-replacement reaction. In this type of reaction, one element replaces another element in a molecule, producing a new compound and a different element.

In the given reaction, magnesium (Mg) reacts with sulfuric acid (H₂SO₄) to produce magnesium sulphate (MgSO₄) and hydrogen gas (H₂). This can be represented by the following balanced chemical equation:

Mg + H₂SO₄ → MgSO₄ + H₂

This is because the amount of reactant determines the number of reactions that can occur. If the amount of magnesium is increased, more magnesium atoms are available for the reaction with sulfuric acid, leading to a higher rate of reaction.

However, this increase in reaction rate is only valid up to a certain point, after which further addition of magnesium will not lead to an increase in rate of reaction. This is because other factors such as the concentration of sulfuric acid and the temperature of the reaction may become limiting factors that can no longer be compensated by adding more magnesium.

For such more questions on magnesium

https://brainly.com/question/19223717

#SPJ11

Answer:

its a branch of science which deals with chemical and atomaic molecules

Answer:

Chemistry is the study of matter, it properties and the changes that matter undergoes.

ANSWER

Elements that are similar to neon is helium, and argon

Hope its right if not so advance sorry :)

Answer:

He

Explanation:

plato

Answer:

The molarity of the solution is 0.99M.

Explanation:

The molaruty if a solution represents the amount of solute moles contained in 1 liter (1000ml) of a solution.

1st) In this case, we have 17.3g of KCl, so we have to use the KCl molar mass (74.5g/mol) to convert grams into moles:

Now we know that there are 0.23 moles of the solute KCl.

2nd) We have 0.23 moles of KCl contained in 231 mL of solution, so to calculate the molarity (moles of solute contained in 1000mL of solution), we can use a mathematical rule of three:

Finally, the molarity of the solution is 0.99M.

Answer:

B and C

Explanation:

The different types of motor nerves transmit information to and from muscles, and they connect to muscle fibers through the motor endplate.

The statement that is true about the effect of human activity on atmospheric carbon dioxide is Human activity has added carbon dioxide to the atmosphere.

Human activities, such as burning fossil fuels (coal, oil, and natural gas) for energy, deforestation, and industrial processes, have significantly increased the concentration of carbon dioxide in the Earth's atmosphere.

These activities release carbon dioxide that was previously stored in long-term reservoirs, such as fossil fuels and forests, into the atmosphere. This additional carbon dioxide contributes to the greenhouse effect and is a major driver of anthropogenic climate change.

The other statements mentioned are not accurate:

Human activity does not convert carbon dioxide in the atmosphere to other compounds on a large scale. There may be certain localized processes or technologies that aim to capture and convert carbon dioxide, but they are not widespread enough to significantly impact the overall levels of atmospheric carbon dioxide.

Human activity does not consume carbon dioxide in the atmosphere. In fact, human activities release carbon dioxide into the atmosphere through various processes, as mentioned above.

Human activity does not disrupt the carbon cycle by preventing it from reaching the atmosphere. The carbon cycle involves the movement of carbon between the atmosphere, oceans, land, and living organisms.

While human activities can impact the carbon cycle through land-use changes and deforestation, the overall effect is an increase in atmospheric carbon dioxide levels rather than preventing carbon dioxide from reaching the atmosphere.

Know more about  Human activity    here:

https://brainly.com/question/31742327

#SPJ8

Explanation:

pure substances are those substances which are made up of one elements

mixture that those substances which are made by more than two or three elements

Answer:

Brainliest is appreciated

Explanation:

Substances which have a specific composition and cannot be separated into any constituents are called pure substances. Pure substances are further divided into elements and compounds. The combination of two or more pure substances is called a mixture. Mixtures can be classified into two types viz. heterogeneous and homogeneous mixtures. 

EXAMPLES

pure substance

gold, pure water, hydrogen gas

mixture substance

oil and water, sand and sugar

With a Ksp of 4.30*10−11 and a molar mass of 274 g / mol the solubility (in g / L) of the generic salt is mathematically given as

S=0.0604g/l

Generally, the Ksp   is mathematically given as

Ksp=4s^3

Therefore

s=(\frac{4.30 × 10−11}{4})^{1/3}

s=2.207×10^{−4]

In conclusion, solubility is

S=2.207×10^{−4]*274

S=0.0604g/l

Read more about Molarity

https://brainly.com/question/9149034

Answer:48

Explanation:

Answer:  3. 0.125 X 10”23 molecules

Explanation:

a. Titration Curve:

On the x-axis, label it as "Volume of HCl added (mL)"

On the y-axis, label it as "pH"

b. Equivalence Point:

The equivalence point is the point in the titration where the moles of acid (HCl) added are stoichiometrically equivalent to the moles of base (unknown base) present initially. In the given data, the equivalence point can be estimated to be around 25.0 mL of HCl added. This is where the pH drops dramatically from 7.88 to 5.28, indicating the neutralization of the base.

c. Calculation of Kb Value:

To determine the Kb value, we need to find the pOH at half-neutralization, where half the volume of the equivalent point has been reached. In this case, the half-neutralization volume is 12.5 mL (half of 25 mL).

From the data, we can observe that at 12.5 mL of HCl added, the pH is 9.26.

pOH = 14 - pH = 14 - 9.26 = 4.74

pOH = -log[OH-]

[OH-] = 10^(-pOH)

[OH-] = 10^(-4.74)

To find [OH-] in moles per liter (M), we need to convert mL to L.

[OH-] = 10^(-4.74) mol/L

Now, since we know that at the equivalence point, the concentration of the acid (HCl) is 0.10 M, we can use the stoichiometry of the reaction to determine the concentration of the base (unknown base).

From the balanced equation:

HCl + OH- → H2O + Cl-

1 mole of HCl reacts with 1 mole of OH-

0.10 M (HCl) = [OH-] M (unknown base)

Therefore, Kb = [OH-][unknown base] / [base]

Kb = (10^(-4.74) mol/L)(0.10 M) / (0.10 M - 10^(-4.74) M)

Simplify and calculate Kb.

c. Selection of Indicator:

Based on the given pKa ranges of the indicators, the indicator phenolphthalein (pKa range: 8.3 - 10.0) would be appropriate for this titration. The reason is that the pH at the equivalence point is expected to be around 7, which is well within the range of phenolphthalein's color change. Bromophenol Blue and Methyl Red have lower pKa values and would not be suitable for indicating the equivalence point in this particular titration.

d. Calculation of Molarity and % Ionization of the Weak Base Solution:

To calculate the molarity of the weak base solution, we can use the Henderson-Hasselbalch equation:

pH = pKa + log([A-]/[HA])

At the half-neutralization point, [A-] = [HA], and the pH is 9.26.

9.26 = pKa + log([A-]/[HA])

The pKa can be determined using the pOH at half-neutralization:

pKa = 14 - pOH = 14 - 4.74 = 9.26

9.26 = 9.26 + log([A-]/[HA])

log([A-]/[HA]) = 0

[A-]/[HA] = 10^0 = 1

Since [A-] = [HA], the concentration of the weak base (before titration) is equal to the concentration of its conjugate acid.

Therefore, the molarity of the weak base solution is 0.10 M.

To calculate the % ionization of the weak base, we can use the formula:

% Ionization = ([A-]/[HA]) × 100

% Ionization = (1/0.10) × 100

% Ionization = 1000%

Note: The % ionization may exceed 100% in cases where the concentration of the conjugate acid is very small compared to the concentration of the weak base.

The molar mass of X would be 63.55 g/mol and the chemical symbol of X would be Cu (copper).

From the equation of the reaction: F2+2XBr⟶Br2+2XF

The mole ratio of XBr to Br2 is 2:1

Mole of Br2 = mass/molar mass

                      = 0.7241/159.808

                       = 0.004531 mole

Mole of XBr = 2 x mole of Br2

                      = 2 x 0.004531

                        = 0.009062 mole

Molar mass of XBr = mass/mole

                            = 1.300/0.009062

                                 = 143.456 g/mol

Since the molar mass of Br is 79.904, the molar of X would be:

                             143.456 - 79.904

                                   = 63.55 g/mol

Hence, X would be Cu.

More on molar mass calculation can be found here: https://brainly.com/question/20691135

The mass of \(O_2\) needed to produce 8.65 x \(10^{23\) atoms of silver is 22.96 grams.

In the given balanced equation, it is stated that 2 moles of \(Ag_2O\) produce 4 moles of Ag and 1 mole of \(O_2\).

First, let's calculate the number of moles of Ag:

8.65 x \(10^{23\) atoms of Ag / (6.022 x \(10^{23\) atoms/mol) = 1.435 moles of Ag

Since 2 moles of  \(Ag_2O\) produce 1 mole of  \(O_2\), the number of moles of  \(O_2\) needed is half of the moles of  \(Ag_2O\).

Number of moles of  \(O_2\)= 1.435 moles of  \(Ag_2O\) / 2 = 0.7175 moles

Now, we'll use the molar mass of  \(O_2\) to find the mass:

Molar mass = 32.00 g/mol

Mass of  \(O_2\) = number of moles × molar mass

                   = 0.7175 moles × 32.00 g/mol = 22.96 g

Therefore, the mass of  \(O_2\) needed to produce 8.65 x \(10^{23\) atoms of silver is 22.96 grams.

More on stoichiometric calculations can be found here: https://brainly.com/question/27287858

#SPJ1

Answer:

makes now sense

Explanation:

The answer is option is a fluidity

Answer:

A. According to the kinetic-molecular theory of liquids, the particles are not bound together in fixed positions; instead they move about constantly giving them their fluidity

Answer:

In the transition series, atomic size across a period decreases at first but then remains relatively constant.

The transition elements in a period show a steady increase in electronegativity.

Explanation:

In considering the transition series, we observe that atomic sizes of the elements decreases first and subsequently remain constant. The reason for the initial decrease in atomic size is the increase in nuclear charge across the period. After the first few elements in the period, the atomic size remains relatively constant due to shielding effect of the inner d electrons which opposes the increase in effective nuclear charge.

It is also observed that electro negativity increases smoothly across the period for the transition series. Consequently, the transition series become less electro positive across the period.

We are going to have the polynomial as;

\(4u^7 + 13 u^2 - 9\)

We know that when we talk about the Polynomial we are referring to the values in which one of the algebraic terms have been raised to a given power as we can see in the problem that we have in the statement that has been made here.

We have the polynomials as;

\((8u^7 + 5u^5 - 5) - (4u^7 - 8u^5 + 4)\)

When we open up the bracket;

\(8u^7 + 5u^5 - 5 -4u^7 + 8u^5 - 4\)

We then have;

\(8u^7 - 4u^7 + 5u^5 + 8u^5 - 5 - 4\\4u^7 + 13 u^2 - 9\)

Thus we have seen how the difference between the polynomials can be gotten for the problem that we have in this case here as shown by the problem that have been solved in the statements above us here.

Learn more about polynomials:https://brainly.com/question/11536910

#SPJ1