can anyone please help with this?

Answer:

17. 10 atoms

18. 21 atoms

Explanation:

17. 2 Phosphurus and 8 Oxygen

18. 6 Sodium, 3 Sulfur, and 12 Oxygen

Answer:

In classical theories of gravitation, the changes in a gravitational field propagate. A change in the distribution of energy and momentum of matter results in subsequent alteration, at a distance, of the gravitational field which it produces.

Explanation:

Answer:

The answer is that light is faster than sound.

Explanation:

A good example is of lightning and thunder during a thunderstorm.

mark me brainliest!

Answer:

I need an image to help you as best as I can. Hopefully, this gets your attention so I can try to help!

Explanation:

Answer:

chemical elements

Explanation:

I think

Answer:

all of the known elements that exist in the world today.

Explanation:

The Periodic Table

Answer:

All living things are organized into groups by scientists as they are identified. Living things organized into particular groups have common characteristics. Overall, the reason scientists classify living things is to understand the relationships between different organisms

Explanation: Naruto

Answer:

C

Explanation:

look at the attachment

Answer:

they are different forms of matter

Explanation:

Chromium(II) fluoride is the name given to the substance CrF2. In this compound, fluorine (F) is present as fluoride anion while chromium (Cr) is present in +2 oxidation state.

The compound contains two fluoride ions, as indicated by the number prefix "di-" before the element symbol F. An inorganic substance called chromium(II) fluoride crystallizes into a solid. It has a crystal structure that mirrors its atomic arrangement and is composed of fluoride anions and chromium cations. Chromium(II) fluoride is useful in many different industries. It serves as a catalyst in some chemical reactions and as a precursor in the manufacture of other chromium compounds.

Learn more about Chromium(II) fluoride, here:

https://brainly.com/question/21624719

#SPJ6

Answer:

Water

Explanation:

Gas=  0.689/ml x 1000 ml = 680 g

Water= 1/ml x 1000 ml = 1000 g (grater)

1 liter of water would have greater mass than the I liter of gasoline if the density of water is 1.00 grams/milliliters and that of gasoline is approximately 0.68 grams/milliliters.

It can be defined as the mass of any object or body per unit volume of the particular object or body. Generally, it is expressed as in gram per cm³ or kilogram per meter³.

By using the above formula for density

ρ = mass / volume

As given in the problem we have to find which has the greater mass, 1 liter of water or I liter of gasoline if The density of water is 1.00 g/mL and that of gasoline is approximately 0.68 g/mL

1 Litre = 1000 milliliter

1 liter of water = 1000 milliliter

mass of 1 liter of water = density of water ×volume of water

                                     = 1.00 grams/milliliters×1000 milliliter

                                     =1000 grams

Similarly;y for the gasoline ,

1 liter of gasoline = 1000 milliliter

mass of 1 liter of gasoline = density of gasoline ×volume of gasoline

                                          = 0.68 grams/milliliters×1000 milliliter

                                          =680 grams

Thus we calculated that 1 liter of water would have a mass of 1000 grams while the I liter of gasoline has mass of 680 grams.

Learn more about density from here

brainly.com/question/15164682

#SPJ6

Answer:

40+22=

Explanation:

62

Answer:

my answer is measuring cylinder

Answer:

Law of Conservation of Mass

Explanation:

Balancing chemical equation means that the amount of moles of one atom on side must match the other, which makes sure that no atoms are created nor destroyed in the reaction process.

Answer:

The right increasing order is Liquid, gas, plasma (the last option).

The bodies, depending on the temperature and pressure conditions, can be in the form of liquid, gas or solid. The liquid form corresponds to a form of less energy than the gas (the kinetic energy of the molecules of a liquid is insufficient to break the forces which materialize by the surface tension) but of energy superior to the solid form (contrary to the solid, the kinetic energy of the molecules is enough to make them move spontaneously relative to each other).

A plasma is a phase of matter made up of charged particles, ions and electrons. It possesses a kinetic energy superior to that of gases.

Explanation:

Answer:

300g

Explanation:

your weight will change but mass is constant and does not change.

Explanation:

Synthetic fiber or synthetic fibre (in British English; see spelling differences) are fibers made by humans through chemical synthesis, as opposed to natural fibers that are directly derived from living organisms. They are the result of extensive research by scientists to improve upon naturally occurring animal and plant fibers. In general, synthetic fibers are created by extruding fiber-forming materials through spinnerets, forming a fiber. These are called synthetic or artificial fibers. Synthetic fibers are created by a process known as polymerization, which involves combining monomers to make a long chain or polymer. The word polymer comes from a Greek prefix "poly" which means "many" and suffix "mer" which means "single units". (Note: each single unit of a polymer is called a monomer). There are two types of polymerization: linear polymerization and cross-linked polymerization.

Synthetic material are madeup of monomers and long chain of monomers are known as polymers. The process is known as polymerization and the synthetic material are turned as microplastic which takes a long period of time to decompose. By this way the synthetic materials are very harmful for the society.

Synthetic materials are microplastic pollution and madeup up of polymers which is a long chain of polymers and the process is known as polymerization.

The synthetic materials are often converts into microplastic that takes a long period of time  to decompose and they are also responsible for generation of greenhouse gases.The synthetic material which is popularly known is nylon which is very tough to recycle.

Therefore,synthetic material are turned as microplastic which takes a long period of time to decompose. By this way the synthetic materials are very harmful for the society.

Learn more about synthetic material here:

https://brainly.com/question/24357817

#SPJ2

Answer: The third one 0.750 L

Explanation: 1,000 Millilitres equal 1 Liter

500 + 250 = 750 (Not A Liter)

So 0.750 L

Answer:

0.75L

Explanation:

I guess you know what's the total milliliters he drank right? 750ml

To convert ml to L, you have to know 1000ml is equal to 1L. So all you have to do is to divide the 750 by 1000 which is 0.750ml.

Answer:

there is no sound is space or because there in no gravity

Explanation:

Answer:

there are a couple reasons

they would be able to hear outside there suits i believe also gravity is light on the moon so rocks would likely fall softly where they would notice also landslide would be very rare on the moon due to the material the moon i s made of which would moves do to impact and there are a lot of reasons that anyone could make up

Explanation:

but the scientific answer is : sound waves needs a medium to travel just like our planet, we are able to hear each other because the air around us acts as the medium which sound waves travel, however, the moon does not have any air that sound waves,which a landslide would produce, use to travel from one place to another.

Answer:

3

Explanation:

because biotic are things you can touch

Answer:

a flowing stream

Explanation:

.........

Answer:

A Electromagnetic waves from the tower produce an electric current in the cell phone's internal circuit when intercepted by the phone's antenna.

Explanation:

Its correct I just did it

The correct option is A which is when a cell phone's antenna picks up electromagnetic waves from a tower, the phone's internal circuit becomes electrically charged through which communication is enabled.

Radio waves are sent by mobile phones through a base station network, which is a collection of permanent antennas. Since radiofrequency waves are electromagnetic fields rather than ionising radiation like X-rays or gamma rays, they cannot ionise or destroy chemical bonds in living organisms.

A cell tower has several antennas linked to it, usually positioned on a head frame. Even more than 15 antennas per carrier are found on some towers. This figure largely depends on the performance, area of coverage, and capacity needs of the antenna.

Effect of 5G on health: There are growing worries that the higher intensity radiation from 5G could harm those living close to cell towers. According to theories, the harm done to human DNA by this rise in radiofrequency radiation will result in cancer, premature ageing, and disturbance of cell metabolism.

To know more about the similar questions on 'electromagnetic waves'

visit- https://brainly.com/question/3001269

#SPJ2

Answer:

A rock is an inconsistent mixture of minerals, while mineral is "pure" and made  up of a precise combination of chemicals.

Explanation:

Answer:

A stronger base.

Explanation:

In neutralization reactions, when an acid is mixed with a base, both species react to different degrees that depends on the concentrations and volumes of the acid and the base. In this case the student mixes a strong base (250 mL) with a strong acid (100 mL), what will happen is that the substance that is going to predominate (strong base) will be the one that is in greater quantity than the other, so the solution will remain a strong base.

Answer:

1. False

2. True  

3. True

4. True

5. False

Explanation:

Answer:

1. False (All compounds are molecules but not all molecules are compounds)

2. True (elements make up a compound by combining chemically together)

3. True (water is a molecule consisting of 3 atoms and 2 hydrogen that bond together)

4. True (they are made by humans using different nature uses and chemical structures that cannot be found in nature)

5. False (a compound is made up of two or more different atoms that can bond or be broken down into simpler compounds)

Hope this helps:)

Explanation:

Answer:

Easy 46 million turkeys

Medium three days

Hard: 1934

Fun: The first President on record issuing a "pardon" to his turkey was Ronald Reagan.

Explanation:

hop tis helped

Answer:

Laboratory experiences may enhance student understanding of specific scientific facts and concepts and of the way in which these facts and concepts are organized in the scientific disciplines. ... Laboratory experiences may promote a student's ability to identify questions and concepts that guide scientific.

The overall lab experience of a student , researcher, a scientist or a faculty have to evaluated in order to improve our activities and to gain knowledge in laboratory safety policies and measurements.

In a laboratory, there are many more chemicals, equipments and instruments and they all have to be well placed based on their chemical and physical prosperities.

The solubility, reaction with air and water, corrosive nature and other storing conditions have to strictly followed for all chemical in a lab. Similarly all the equipments have to be cleaned well and instruments to calibrated.

Frequent checking of these storage chemicals and instruments helps to reduce any errors. Similarly we have to study other safety measurements that should be taken if any lab accidents are occured.

Thus analysing our experience in lab helps us to provide an idea that where we have to improve and concentrate more when working in lab.

To find more about chemical labs, refer the link below:

https://brainly.com/question/28300640

#SPJ2