i dont know what to do

Answer:

Its C

Explanation:

If you look, you can see that it tells you the humidity and the that its warm but it also tells you that it storms a little to and that makes it easier to know the climate but if it just sayed it was warm that wouldn't be enough information

CAN I PLS HAVE BRAINLIEST. I NEVER GET IT. ITS A LITTLE CROWN UNDER MY ANSWER. PLS. ILL GIVE YOU BRAINLIEST JUST PLS

The specific heat capacity of the unknown metal is 344 J/kg⁰C. And the type of metal that is the unknown sample is silver.

To answer this question, use the following formula:

                myCy ΔT= mₓ. Cₓ.ΔT

Information:

mₓ = Unknown mass of metal

ΔTₓ = temperature of unknown metal

my = Mass of water

Cy = Density of water

ΔTy = temperature of water

Given the values ​​for this question.

mₓ = 0.75 kg

ΔTₓ = (89.4⁰C – 0⁰C) = 89.4⁰C

Tₓ = 89.4⁰C

me = 1.25 kg

Cy = 4200J/kg⁰C

ΔTy = (24.4°C - 20.0°C) = 4.4°C

Then the specific heat capacity of the unknown metal is:

Cy ΔTy = Mₓ. Cₓ.ΔTx

Cₓ = Cy ΔTy/ Mₓ.ΔTx

Cₓ =1.25 x 4200 x 4.4/0.75 x 89.4

Cₓ = 23100/67.05

Cₓ = 344 J/kg⁰C

The specific heat of an unknown metal is silver.

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Answer:

Hello calcium maintains healthy bones and muscles. Zinc is for immune function. Iron carrier oxygen to blood. Sodium maintains fluid balance in the body.

Answer: Zinc : plays a role in immune system function

Iron: carries oxygen to all body tissues

Calcium: Maintains healthy bones and muscles

Sodium: maintains fluid balance in the body

Explanation: Got it right on PLATO/edmentum

Answer:

10.0g of solute before reaching saturation

Explanation:

A saturated solution is the solution that contains the maximum amount of solute that can be dissolved. In the problem, you can have

50.0g of solute / 500.0g Solvent

Now, in 800.0g solvent you can dissolve:

800.0g Solvent * (50.0g solute / 500.0g Solvent) = 80.0g of solute can be added

As you dissolve initially 70.0g of solute. You can add:

80.0g - 70.0g =

The Balanced Chemical Equation is: Na2SO3(aq)+2HCl(aq)→H2SO3(aq)+2NaCl(aq)

What is an Equivalent point?

In an acid-base reaction, the equivalence point is when chemically equal amounts of acid and base are mixed. This is a general reaction pathway that produces a specific acid/base or salt from a mixture of other acids and bases.

This is a mixed acid-base reaction up to the equivalence point.

Aqueous Sulfurous Acid: H2SO3(aq)

Aqueous Hydrochloric Acid: NaCl(aq)

Aqueous Sodium Sulfite: Na2SO3(aq)

Aqueous Hydrochloric Acid: HCl(aq)

Therefore, the balanced formula is:

Na2SO3(aq)+2HCl(aq)→H2SO3(aq)+2NaCl(aq)

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The more  precise work was done by Student A as the student's data has a smaller standard deviation which is near to accuracy.

Accuracy in terms of chemistry can be defined as to how close a measurement is to the true value.There are three types of accuracy:

1) Point accuracy-It means accuracy is present at that point of scale only.It does not give any information about the accuracy of the instrument.

2)Percentage of true value--It is the accuracy  which is determined by identifying accuracy of the instrument  and comparing it with the measured true value.

3)Percentage of scale range- It is the accuracy  which determines accuracy of the measurement.

Accuracy in case of instruments  is neglected up  to ±0.5 percent.

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Answer

V2 = 24.872

Explanation:

If 3.7 moles of propane are at a temperature of 28°C and are under 154.2 kPa of pressure, what volume does the sample occupy? ... 145 g of carbon dioxide have a volume of 34.13 dmº What is the temperature ... a pressure of 3.11 atm, a 276 g sample of

an unknown noble gas occupies 13.46L

Answer:

MASS

Explanation:

Formula for heat energy will be;

Q = mcΔt

Where;

m is mass

c is specific heat capacity

ΔT is change in temperature

Now, since both substances are copper, it means they will have the same specific heat capacities.

Thus, from the formula given earlier, it is seen that the mass is inversely proportional to the temperature change.

This means that the smaller the mass, the greater the temperature change.

Thus, the 3 g sample of copper will experience a greater temperature die to its smaller mass

Answer:

4

Explanation:

The pH of the solution after 28.0 mL of 0.50 M NaOH has been added to the 50.0 mL of 0.50 M HCl is approximately 0.85. However, this value is not present in the given options.

The method of determining the concentration of a solution by measuring the volume of a solution with a known concentration that is required to react with a certain amount of the solution is called titration. A titration experiment requires the use of an indicator, which is a substance that changes color when a reaction is complete.

The pH of a solution may be determined using titration, and the pH may be computed if the volume of the titrant and the initial pH of the solution are known. A burette and pipette are used in the titration.

The pH of a solution is the negative logarithm of the concentration of hydrogen ions. A pH of 7 indicates a neutral solution, a pH of less than 7 indicates an acidic solution and a pH of more than 7 indicates a basic solution. The pH of a solution can be determined using a pH meter, a colorimetric pH indicator, or an electronic pH meter.

To find the pH of the solution after 28.0 mL of 0.50 M NaOH has been added to the 50.0 mL of 0.50 M HCl, the steps followed are:

1. Calculate the moles of HCl and NaOH:
Moles of HCl = (volume of HCl) × (concentration of HCl) = 50.0 mL × 0.50 M = 25.0 mmol
Moles of NaOH = (volume of NaOH) × (concentration of NaOH) = 28.0 mL × 0.50 M = 14.0 mmol

2. Determine the moles of HCl remaining after the reaction with NaOH:
Since HCl and NaOH react in a 1:1 ratio, the moles of HCl remaining are 25.0 mmol - 14.0 mmol = 11.0 mmol.

3. Calculate the concentration of HCl in the final solution:
The total volume of the solution is 50.0 mL + 28.0 mL = 78.0 mL.
The concentration of HCl remaining = (moles of HCl remaining) / (total volume) = 11.0 mmol / 78.0 mL = 0.141 M

4. Calculate the pH of the solution:
pH = -log₁₀(concentration of H⁺) = -log₁₀(0.141) ≈ 0.85

Therefore, the pH of the solution is approximately 0.85.

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Answer:

A metal reacts with a non-metal to transfer electrons from the metal to the non-metal to complete their valance shell.

Explanation:

The amount of water that crystallises is 305.1%.

Crystalization is a process of separating solid particles from a solution. It occurs when a solvent, such as water, is mixed with a solute, such as salt or sugar.The percentage of water of crystallization in 35.7g Na₂CO₃ 10 H₂O can be calculated using the following equation:

Percentage of water of crystallization =\((\frac{Mass of water of crystallization}{Mass of anhydrous salt}) * 100\)

Mass of water of crystallization = 10 * (18.015 g/mol) = 180.15 g

Mass of anhydrous salt = (2 * (22.99 g/mol) + 1 * (12.01 g/mol)) = 58.97 g

The percentage of water of crystallization =\((\frac{180.15 g}{58.97 g}) * 100 = 305.1 \%.\)

Therefore,The percentage of water of crystallization is 305.1%.

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Answer:

1.772 gram is the approximate answer

Explanation:

molecular mass of AlCl3 is 132 g per mole and of Al(OH)3 is 78 g per mole

the reaction is

AlCl3 + 3 NaOH ---> Al(OH)3 + 3 NaCl

from the reaction it is clear that 1 mole AlCl3 makes 1 mole Al(OH)3

implies 132g AlCl3 gives 78g Al(OH)3

Implies 3g AlCl3 gives

3*122/78 = 1.772 grams

The equation for this reaction is

\(\text{Mg}+\text{O} \longrightarrow \text{MgO}\)

This means that for every mole of magnesium consumed, 1 mole of magnesium oxide is produced.

So, the answer is 0.094 moles.

The Answer is particle Z

Answer:

The model is particle W

Explanation:

At stp one mole of oxygen gas and one mole of neon atom both have

6* \(10^2^3\) molcules which is avagardo number of molecules.

STP stands for "Standard Temperature and Pressure." In chemistry, it is commonly used as a reference point to describe the properties of gases. STP is defined as a temperature of 0 degrees Celsius (273.15 K) and a pressure of 1 atmosphere (101.325 kPa). At these conditions, the volume of one mole of any gas is 24.45 L.

So one mole of all gas have avagadro number of molecules in it.

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Answer

C₄H₆O₄

Explanation

Given:

The empirical formula of the compound is C₂H₃O₂

The molecular mass of the compound = 118.054 g/mol

To get the molecular formula of the compound, you need to know the actual number of atoms of each element by equating the empirical formula to the molecular mass as follows:

From the Periodic Table:

Molar mass of H = 1.00784 g/mol

Molar mass of O = 15.999 g/mol

Molar mass of C = 12.0107 g/mol

Hence, the molecular formula of the compound is:

The apple is not moving because it is acted upon by balanced forces.

A free body diagram is a visual representation of the forces acting on an object in a particular situation. It is a way of isolating the object of interest and showing all of the external forces that act upon it, without including any of the internal forces that occur within the object itself.

In a free body diagram, the object is usually represented as a dot, and arrows are used to represent the direction and magnitude of each external force acting upon it. The size and direction of each arrow represents the strength and direction of the force, respectively. The arrows are labeled with the name of the force and its magnitude in appropriate units.

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Answer: 43.8 Volts

Explanation:

Ohms law states that current is directly proportional to voltage applied.

\(V=I\times R\)

where V = voltage = ?

I = current = 0.73 A

R = resistance = 60 ohm

Putting in the values we get:

\(V=0.73A\times 60ohm=43.8V\)

Thus the voltage of the battery is 43.8 Volts

Approximately 3.04 grams of magnesium would be required to react with 0.25 moles of hydrochloric acid.

To determine the mass of Mg required, we need to use the balanced chemical equation for the reaction between hydrochloric acid (HCl) and magnesium (Mg):

2HCl + Mg → MgCl2 + H2

From the balanced equation, we can see that 2 moles of HCl react with 1 mole of Mg. Therefore, if 0.25 mol of HCl reacts, we would need half of that amount, which is 0.125 mol of Mg.

To calculate the mass of Mg required, we need to multiply the number of moles of Mg by its molar mass. The molar mass of Mg is given as 24.31 g/mol. Therefore, the mass of Mg required can be calculated as follows:

Mass of Mg = Number of moles of Mg × Molar mass of Mg

Mass of Mg = 0.125 mol × 24.31 g/mol

Mass of Mg = 3.04 g

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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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Answer: both

Explanation:

To determine the number of unpaired electrons, we need to first fill up all the orbitals according to the Aufbau principle, Hund's rule, and the Pauli exclusion principle.

Electrons are subatomic particles with a negative charge that orbit the nucleus of an atom. They are responsible for the chemical properties of an element and are involved in chemical reactions, bonding, and the transfer of energy. The number and arrangement of electrons in an atom determine its chemical and physical properties. The electron configuration of an atom describes the distribution of electrons in its orbitals, and it is an important factor in determining how an atom will interact with other atoms.

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The range of the of the oxidation number of the first transition series is +2 to +6.

Transition elements or transition metals are elements or metals that have partially filled d orbitals.

The first main transition series begins with either;

Thus, the range of the of the oxidation number of the first transition series is +2 to +6.

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This isn't mine, but this is an urgent question so writing my own answer would be time consuming, so here's a non-plagiarised answer :

Community is much more than belonging to something. It's about doing something together that makes belonging matter. We also talk about being in community and having a sense of community or community spirit. This is what it means to be in a genuine community — a feeling of belonging, of togetherness.

This is a different perspective from someone else :

A community is a group of people who share something in common. You can define a community by the shared attributes of the people in it and/or by the strength of the connections among them. You need a bunch of people who are alike in some way, who feel some sense of belonging or interpersonal connection.

Answer:

bbbbbbbbbbbbb bbee been been been been been bbeen been been hereafter idskdhjsjahdh#इ ह्ज!उकालो ज्वाला

Answer:

Ar

Explanation:

the last one

The diagram that shows a pure substance which is composed of only individual atoms and not molecules will be: argon gas. Option D is correct.

A pure substance composed of only individual atoms is called an element. In the periodic table, each element is represented by a unique symbol, and its atoms cannot be further broken down into simpler substances by chemical means.

Liquid water: Water (H₂O) is a compound composed of two hydrogen atoms bonded to one oxygen atom. It consists of molecules, not individual atoms.

Hydrogen gas: Hydrogen gas (H₂) is composed of two hydrogen atoms bonded together to form a diatomic molecule. It is not composed of individual atoms.

Carbon dioxide GAS: Carbon dioxide (CO₂) is a compound consisting of one carbon atom bonded to two oxygen atoms, forming a molecule of CO₂.

Argon gas: Argon (Ar) is an element, and in its pure form as a gas, it exists as individual argon atoms (Ar). It is not bonded to any other atoms, and there are no molecules involved. Therefore, argon gas is composed of individual atoms and represents a pure substance.

Hence, D. is the correct option.

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The boiling point of the solution will increase and the freezing point will decrease when diluted with an additional 100 grams of water.

When a solute is dissolved in a solvent, it affects the boiling and freezing points of the solution. Adding 100 grams of water to the solution dilutes it, meaning the concentration of the solute decreases. Dilution generally results in an increase in boiling point and a decrease in freezing point.

The boiling point elevation occurs because the presence of the solute particles disrupts the formation of vapor bubbles during boiling. By diluting the solution, the concentration of the solute decreases, leading to a decrease in the disruption of vapor bubble formation and thus an increase in boiling point.

Similarly, the freezing point depression occurs because the solute particles interfere with the formation of the solid lattice during freezing. By diluting the solution, the concentration of the solute decreases, reducing the interference and resulting in a decrease in the freezing point.

Therefore, when the solution is diluted with an additional 100 grams of water, the boiling point will increase, and the freezing point will decrease.

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The final pressure of the gas, when the volume is increased from 12.8 L to 25.6 L, can be calculated using Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at constant temperature.

In the first scenario, the initial pressure is 0.987 atm and the initial volume is 12.8 L. The product of pressure and volume is constant (P₁V₁ = P₂V₂), so we can calculate the final pressure (P₂) using the equation:

P₂ = (P₁ * V₁) / V₂

Plugging in the values, we have:

P₂ = (0.987 atm * 12.8 L) / 25.6 L = 0.494 atm

Therefore, the final pressure of the gas, when the volume is increased to 25.6 L, is 0.494 atm. Hence, the correct answer is option c) 0.494 atm.

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Answer:

I HOPE IT HELPED THANKS