How many grams of potassium chloride (KCl) can be dissolved in 68.0g of water at 40°C? Please help.

Answer:

Answer: 12

Explanation:

\({ \sf{3Na _{2} O +2 AIBr _{3} \rightarrow 6NaBr + AI _{2} O _{3} }}\)

\({ \tt{sum = 3 + 2 + 6 + 1}} \\ = { \tt{12}}\)

Answer:

12

Explanation:

3+2+6+1

Answer:

k

Explanation:

Answer:

D. A bright light

To determine the need to test for specific properties the equipment used is litmus paper.

Specific properties are defined as a features of a material are generated from its other extensive and intensive properties. The uses of specific properties are Ranking, Classifying, and Comparing: Specific features can be used to compare two attributes while reducing the impact of differences in a third attribute.

Litmus paper is defined as a kind of paper that can be used to detect acidity because it changes color in relation to how acidic the solution it is dipped in is. As blue litmus paper turns red under acidic conditions, and red litmus paper turns blue under basic or alkaline settings, the primary application of litmus is to evaluate whether a solution is acidic or basic.

Thus, to determine the need to test for specific properties the equipment used is litmus paper.

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The plants take energy from the sun, air, and water and make their food by photosynthesis.

Plants are producers because they undergo photosynthesis. Photosynthesis is the method of taking sunlight, CO2, and water to produce ATP in the form of glucose and oxygen.

For plants to make their own food they require the reactants of photosynthesis. The reactants are sunlight. In other words, sunlight, carbon dioxide (air), and water. Without these reactants, photosynthesis cannot occur.

Things such as soil and fertilizer are helpful to a plant's growth; however, they are not required in the process that creates food for plants.

Hence the plants take energy from the sun, air, and water and make their food by photosynthesis.

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Knowing the concentration of solutions is important in the real world for several reasons. Firstly, concentration provides information about the amount of solute present in a given volume of solvent, which is crucial for various scientific, industrial, and medical applications. Here's an example to illustrate the significance of concentration:

In the field of medicine, determining the concentration of drugs in pharmaceutical solutions is essential for accurate dosing and patient safety. Healthcare professionals need to know the concentration of active ingredients in medications to prescribe the appropriate dosage for patients. For instance, consider a situation where a doctor needs to administer a specific amount of a medication to a patient. Without knowing the concentration of the drug in the solution, it would be challenging to determine the correct volume of the solution needed to deliver the desired dosage. Incorrect concentrations or dosages can lead to ineffective treatment or even harmful side effects for the patient.

Additionally, concentration measurements play a vital role in environmental monitoring and analysis. For example, in water quality assessment, measuring the concentration of pollutants or dissolved substances in bodies of water helps identify potential contamination and evaluate the health of aquatic ecosystems. By monitoring the concentration of contaminants such as heavy metals or nutrients, environmental scientists can determine the impact on aquatic life and implement appropriate measures for pollution control and remediation.

Overall, understanding the concentration of solutions is crucial for a wide range of practical applications, including pharmaceuticals, environmental analysis, chemical manufacturing, food and beverage production, and many others. Accurate concentration measurements enable informed decision-making, quality control, and precise formulation, ensuring the effectiveness and safety of various products and processes in the real world.

Answer:

Zinc Carbon Battery

Zinc and carbon are used to make the electrodes.

The electrolyte is made of an acid paste.

Zinc carbon batteries and cells are low-cost non-rechargeable batteries that can power a wide range of electrical and electronic equipment. They are used in many electrical and electronic equipment.

Zinc - Carbon batteries have a larger capacity than alkaline batteries and a lower operating resistance. They have enhanced their low-temperature capability, and leak resilience, and can discharge on their own.

Alkaline Battery

Alkaline batteries are disposable batteries having zinc and manganese dioxide electrodes. The alkaline electrolyte utilized is potassium or sodium hydroxide.

These commonplace batteries may be used in devices such as alarm clocks, calculators, torches, Remote controls, radios, gadgets that are remote controlled, and children's toys.

Based on evidence from Sim, when two substances were combined they did not change into different substances.

Here the word Sim is used to describe the process simulation. Simulation is defined as when two substances combined they do not change into different substances.

They just combine together and form a new substance.

Let us understand it as the first substance is liquid and the second substance is solid then when we combine both of them they form a new mixture but do not change their property.

The mixture is still liquid but it also has some properties of solid substance.

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The substances did not change into different substances.

Based on the information provided in the question, there is no evidence or indication of any chemical reaction or change in the substances when they were combined in the cup. The question does not mention any observations or effects that would suggest a chemical transformation.

If there were a chemical reaction or change, it would typically be accompanied by observable signs such as color change, gas production, temperature change, or formation of a precipitate. However, since the question does not provide any evidence or observations of such changes, we can conclude that the substances did not undergo any chemical transformation when combined.

It is important to note that without additional information or details about the substances and their behavior, it is not possible to make definitive conclusions. However, based on the given information, the most reasonable conclusion is that the substances remained unchanged when combined in the cup.

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Answer: MAUNA LOA VOLCANO (VNUM #332020)

19°28'30" N 155°36'29" W, Summit Elevation 13681 ft (4170 m)

Current Volcano Alert Level: WARNING

Current Aviation Color Code: ORANGE

AHYI SEAMOUNT VOLCANO (VNUM #284141)

20°25'12" N 145°1'48" E, Summit Elevation -449 ft (-137 m)

Current Volcano Alert Level: ADVISORY

Current Aviation Color Code: YELLOW

KILAUEA VOLCANO (VNUM #332010)

19°25'16" N 155°17'13" W, Summit Elevation 4091 ft (1247 m)

Current Volcano Alert Level: WATCH

Current Aviation Color Code: ORANGE

Explanation: hope that helps

Answer:

Civic expression includes all the ways citizens share their opinions and show concern for their community. It can take the form of action, such as voting, but it can also be demonstrated through writing or spoken text. It is a critical part of American society.

Explanation:

\( {xe}^{138} \)

Explanation:

the bottom number would be 54. This is because you add one to 53 to make it 54 and you add 0 to 138.

The Answer is 0.001156.

Not a straight up answer, but moreover to help you get it: (Circuit Boards)

Aside from the tasks it performs, perhaps the most important function of a circuit board is providing a way to integrate the electronics for a device in a compact space. A PCB allows components to be correctly connected to a power source while being safely insulated. Also, circuit boards are less expensive than other options because they can be designed with digital design tools and manufactured in high volume using factory automation.

Partially straight up, helping you  get the answer: (Copper Chloride)

Copper(II) chloride is the chemical compound with the chemical formula CuCl 2. This is a light brown solid, which slowly absorbs moisture to form a blue-green dihydrate.

Etching helps us to see the structure of the atoms of copper.

The term etching refers to the process by which we expose the inner structure of copper. It is usually done electrically or by the use of an acid. The surface of the copper is removed and the inner structure of the copper is shown.

As such, when you etch copper, you can see the inner structure such as the arrangement of the atoms of copper and how they fit together.

As such looking through the etched copper would help you to appreciate that matter is composed of atoms.

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Answer:

39

Explanation:

Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.

Answer: nucleus  

Explanation:

Answer:

Oh the screenshot lol

Explanation:

Answer:

liquids: water and soda

gases: oxygen and carbon dioxide

solid: a chair and a notebook

Answer:

Explanation:A chemical response is a chemical transformation in which two chemicals combine to create a third component.

(i) Adding diluted acid to an active metal causes the test tube to heat up and hydrogen gas to escape, which results in the production of heat.

(ii) When diluted hydrochloric acid is added to silver nitrate, AgCl, a white precipitate, results.

(iii) When water is added to quicklime, the mixture boils and produces heat along with a hissing sound.

(iv) Thermal breakdown of mercury oxide - Mercury turns from red to a metallic silver tint as a result of this process.

Answer:

Solar Eclipse happens when the moon gets between the sun and the earth, the moon gets all the light and blocks the earth from getting sunlight.

Hope this helps ;) ❤❤❤

To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.

Answer:

HCl , Chocolate Milk , NaCl + H2O, Sand + H2O , Tea + Sugar

Explanation:

here the answer Deku

Answer:

No, a plastic wire would not conduct electricity. This is because plastic is an insulator that does not allow electric current to flow through it. In a wire, electrical conductivity is provided by the movement of charged particles - typically, electrons. Copper is an excellent conductor of electricity because it has a high number of free electrons that are not bound to atoms and can move through the wire very easily. However, in a plastic wire, the tightly bound electrons of its atoms do not allow for the free flow of charges, thus preventing the passage of electric current.

Answer:

B mixtures

Explanation: