What are the subatomic particles of barium

Answers

Answer 1

Answer: Electrons (negative charge, and orbits the nucleus), Protons (positive charge, and is in the nucleus) and Neutrons (no charge, and is in the nucleus)

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A rigid canister holds 50.0 L of helium gas at 32.0°C and 49.9 kPa. The gas is cooled until the pressure reaches 14.2 kPa. What is the Kelvin temperature of the helium?

Answers

Answer:-

86.794 K

Explanation:-

Initial temperature T 1 = 32 C + 273 = 305 K

Initial Pressure P 1 = 49.9 KPa

New Pressure P 2 = 14.2 KPa

The Volume remains same since it is rigid.

∴V 1 = V 2 = 50.0 L

Using the relation

P 1 V 1 / T1 = P 2 V 2 / T 2

New temperature T 2 = P 2 V 2 T 1 / ( P 1 V 1)

= 14.2 KPa x 50.0 L x 305 K / ( 49.9 KPa x 50.0 L)

= 86.794 K

What scientists do that is the basis for their investigations

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Scientists conduct investigations based on systematic observations, research questions, and the development of testable hypotheses.

What isd the wprk of scientists

They design experiments, collect data, and analyze it using statistical methods. Peer review and replication are important for ensuring the validity of findings.

Scientists collaborate, communicate their results, and develop theories to explain natural phenomena. The scientific method and critical thinking are central to their work.

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Scientists use curiosity, imagination, and previous scientific study to create research questions and hypotheses to begin their investigations into natural phenomenon. They use this process which formally is called the scientific method to carefully construct experiments to guide investigations of the world around them.

A 1-gram sample or a compound is added to 100 grams of H2O(l) and the resulting mixture is then thoroughly stirred. Some of the compound is then separated from the mixture by filtration. Based on Table F, the compound could be(1) AgCl (3) NaCl

(2) CaCl2 (4) NiCl2

Answers

The answer is AgCl or Silver Chloride. Silver chloride is a biological compound with the chemical formula of AgCl. This white crystal-like rock-solid is well recognized for its little solubility in water. Upon light or heating, silver chloride transforms to silver (and chlorine), which is gestured by greyish or purplish coloring to other samples.

tiny time has decided to make 288 tricycle each day. how many tricycle seats, wheels ,and pedals are needed ?

Answers

seats- 288

wheels- 864

pedals- 576

hope this helps

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Describe and explain how petrol is separated from the mixture of hydrocarbons in crude oil.

Answers

The process is called fractional distillation. It works by heating up the crude oil inside a chamber to a boil (vaporizing it). Due to the fact that each component of crude oil has a different boiling point, each component of the crude oil will condense at a different height inside the chamber since the chamber gets colder the further up you go away from the heat source. Since each component condenses at different heights in the chamber, there are places to collect condensing liquid at different heights in the chamber (The heights correspond to the boiling point of each component). These collection areas will collect only the component of crude oil that condenses at that temperature. The condensing point is basically the boiling point which means the lower in the chamber that component condenses at, the higher the boiling point for that component is and therefore the heavier that component is (the heavier components get collected near the bottom of the chamber while the lighter components get collected near the top of the chamber).

I hope this helps. Let me know if anything is unclear.

Final answer:

Petrol is separated from the hydrocarbons in crude oil via fractional distillation, a process that uses the different boiling points of hydrocarbons to separate them. Lighter hydrocarbons like petrol vaporize at lower temperatures and are then condensed and collected separately.

different fractions, including petrol from the crude oil.

Explanation:

Petrol is separated from a mixture of hydrocarbons in crude oil through a process known as fractional distillation. This process takes advantage of the different boiling points of hydrocarbons present in crude oil. The crude oil is heated, and as the temperature increases, different hydrocarbons begin to vaporize.

For example, petrol, which is composed of relatively light hydrocarbons, will vaporize at lower temperatures compared to heavier hydrocarbons like diesel or lubricating oil. After being vaporized, the hydrocarbons are condensed and collected separately, effectively separating the

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Why do we ignore noble gases usually when we discuss electronegativity values?

Answers

Because they don’t have charges

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