The diagram represents liquid water in a pan on a hot plate. The liquid water is boiling and changing into water vapor. The process of boiling water is considered to be a.

Cold water causes a strong reaction between all alkali metals. Each reaction results in the release of hydrogen gas and the production of metal hydroxide.

The six chemical elements that make up Group 1 ( Ia ) of the periodic table—lithium ( Li ), sodium ( Na ), potassium ( K ), rubidium ( Rb ), cesium ( Cs ), and francium—are together referred to as alkali metals ( Fr ). The name "alkali metals" refers to how they react with water to produce alkalies.

The elements in Group 1 are all extremely reactive. To protect them against air and water, they must be kept under oil when being stored. Group 1 elements produce alkaline metal hydroxides when they interact with water (with a pH above 7). They are known as "alkali metals" for this reason.

Thus, the elements in group 1 react with water to form a hydroxide and hydrogen gas is produced.

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Answer:

Fluorine

Explanation:

Answer:

Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom.

Answer: O D. It bonds with the added H+ or OH in solution.

Explanation:

Answer:

They mask the recessive alleles

Answer:

2,8,2,and,7

Explanation:

The chemical formula of CO, Fe₂O₃, and C₂H₄ contain atoms of two different elements. Therefore, option (D) is correct.

A chemical formula provides information about the chemical proportions of atoms of each element that are present in a molecule or chemical compound. The chemical formula can be represented by using chemical symbols of elements, numbers (subscripts), and other symbols, such as commas, dashes, brackets, and plus (+) and minus (−) signs.

A chemical formula of a compound has no words but can be written in certain simple chemical structures. Chemical formulae can be more limited in power than chemical names and structural formulae. There are two kinds of chemical formulas in which one empirical formula and another molecular formula.

In the chemical formula of carbon monoxide (CO) has carbon and oxygen two different elements. In the chemical formula of iron oxide (Fe₂O₃)  iron and oxygen are two different elements. In the chemical formula of ethane (C₂H₄ ) has carbon and hydrogen two different elements.

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Answer:

c

Explanation:

By dissolving a solute in a solvent, a solution can be formed. To dissolve the solute in the solvent quickly, the solution must be shaken well. Thus option A is correct.

A solution is a substance formed by a solid solute in a solvent. The solution can be of homogeneous or hetreogenous. A homogenous solution is the one where the solute completely dissolve in the solvent and both the solvent and solute are in one phase.

In heterogenous solution, the solute and solvent are in two different phases due to the incomplete solubility of the solute. The solubility of a solute depends on the bond type of both solvent and solute, weight of solute, temperature and pressure as well mixing mode by shaking.

Some times heating the solution can be a good way to increase the solubility and quick dissolving. Where, the solute-solute interaction decreases and solvent-solute  interaction increases.

Similarly, shaking thoroughly will make the solute easily dissolve. Hence, option A is correct.

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Answer:

Nitrogen

Explanation:

because a rule i use called the "en,ne" rule

Any element that ends with this is diatomic

Answer:

[tex]\boxed {\boxed {\sf A. \ 19,320 \ kg/m^3}}[/tex]

Explanation:

We want to find the density. The formula is mass over volume.

[tex]\rho = \frac{m}{v}[/tex]

The mass is 500 kilograms. The volume is 0.026 cubic meters.

[tex]m= 500 \ kg \\v=0.026 \ m^3[/tex]

Substitute the values into the formula.

[tex]\rho= \frac{ 500 \ kg}{ 0.026 \ m^3}[/tex]

Divide.

[tex]\rho = 19230.7692 \ kg/m^3[/tex]

This is just about equal to 19,320 kg/m³, so choice A is correct.

Answer:

A) 19230 kg/ m3

Explanation:

divided it's mass by its volume ti get it's density

500/0.026 = 19230

Answer:

There is more space in a balloon with less gases meaning it can move around a lot faster

Explanation:

Answer:

b) 689,000mm

as 1m= 1000mm

Answer:

A

Explanation:

mark me brainlisted please

Hai!

I believe it would have to be 2.3.

Brainliest maybe?

Answer:

according to me option a is the correct one

Answer:

C

Explanation:

Please see the attached picture for the explanation.

Le Châtelier's principle:

When a stress is applied to a system at equilibrium, the system will respond by shifting in the direction that opposes/ minimizes the effect of the stress.

• This stress could be the addition or removal of a product or reactant, changes in the concentration of the products or reactants, or a change in temperature.

☆ Why can heat be written on the same side of the products when the reaction is exothermic?

• Exothermic means that heat is released, thus heat can be treated as a product.

• I like to remember it as Exothermic → Exit

Answer:

The chemical formula H₂O indicates that in one mole of the water there are two moles of hydrogen atoms. Calculate the moles of H₂O in 50 g. moles (n) ..

Explanation:

Answer:

It could lead to Fatigue

Low energy.

Headaches.

Aches, pains, and tense muscles.

Chest pain and rapid heartbeat.

Explanation:

If a construction worker consumes 18000 KJ of energy on a daily basis, this could lead to adverse effects such as fatigue, headaches, aches, tense muscles, chest pain, and rapid heartbeat.

The NHS advises a man who is working at a construction site to eat 2,500 calories, and women to eat 2,000 calories, on daily basis. On an average, construction workers such as women should have around 2,000 calories a day which carries about 8,400 kilojoules and men should have around 2,500 calories a day which is about 10,500 kilojoules.

The best diet for a construction worker include foods such as grain, vegetable, fruit, dairy product, lean meat, seed, and fats for the maintenance of a healthier condition.

If a construction worker is taking 18000 KJ of energy in diet which is almost 8000 KJ more than the required amount then in this case, the worker may have fatigue, headaches, aches, tense muscles, chest pain, and rapid heartbeat.

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Answer:

The Answer would be D. N2O3

Explanation:

the Chemical bond is a Covalent bond to which the prefixes are Di and tri

Answer:Land Population

Answer: Trade winds!

Explanation:

Answer:

2NaOH

Explanation:

Answer:

Explanation:

42.32

Hope this helps sorry if wrong

Answer:

B

Explanation:

Blue triangles are a cold front and red bowls are warm front

Stationary front is a combination

HOPE I helped :]

Answer:

stationary front

Explanation:

on a weather map, a stationary front is shown as alternating red semicircles and blue triangles like in the image at the left. notice how the blue triangles point in one direction, and the red semicircles point in the opposite direction.

Answer:

[tex]\boxed {\boxed {\sf B. \ Iodine }}[/tex]

Explanation:

Atomic radius is the measurement from the nucleus to the outer edge of the electron cloud.

As you go down a group (vertically) the atomic radius increases because more electron shells are added. As you go across a period horizontally, the atomic radius decreases.  

If we look at the halogens group (17), we see they follow this order from top to bottom:

F - Fluorine

Cl - Chlorine

Br - Bromine

I - Iodine

Since it increases down the group, iodine  must have the largest atomic radius.