What is the main idea of science? (states of matter)

Answer:

6

Explanation

every p sublevel holds up to 6 electrons

so the 4p sublevel  must hold up to 6 electonsr

Answer:

Molecularity is the number of ions or molecules that take part in the rate determining step

Order of reaction is the number of molecules of reactant whose concentration changes during the chemical change

Non-metals will never replace metals or vice versa, they'll only replace itself or the only type of reaction that it is or element that it is.

Answer:

An object's thermal energy is dependent upon its temperature and mass. The higher the temperature of a given quantity of a substance, more is its thermal energy. Similarly, for the same temperature, higher mass of a substance will contain more thermal energy

The wave B has wavelength of 415 nm. The value for c is 3.00 x 10 8 m/s. The frequency is 7.22 x 10¹¹ Hz.

Frequency is defined as the number of waves passing through a fixed point in a given amount of time.

The frequency can also be defined as a repeated event is the number of occurrences per unit of time.

Frequency can be expressed as

f = c / ∧

Where c = 3.00 x 10⁸ m/s

           ∧ = 415 nm

So, f = 3.00 x 10⁸ m/s x 415 nm

      f = 7.22 x 10¹¹ Hz.

Thus, the wave B has wavelength of 415 nm. The value for c is 3.00 x 10 8 m/s. The frequency is 7.22 x 10¹¹ Hz.

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Answer:

1st blank : Atoms

2nd blank : Reactants

I'm still trying to find the 3rd blank. I'll put it in comments if I find it

Explanation:

Hope this helps :)

Pls make brainliest :}

And have an amazing day <3

Answer:

A

Explanation:

god loves you

Answer:

363C

Explanation:

V = KT  and T = V/K

3.5=k(35+273) = 308k

k=3.5/308 =0.011

new T=7.0/0.011=636K = 636-273 =363C

Answer:

true

Explanation:

from Newton's second law of motion ,we can understand that acceleration of a body is directly proportional to the force applied on it and inversely proportional to its mass ,so as the force applied increase,the acceleration also increases

Answer:

1.20 atm

Explanation:

A container contains three gases. If the partial pressure of carbon dioxide is 0.50 atm, the partial pressure of nitrogen is 0.30 atm, and the partial pressure of methane is 0.40 atm, what’s the total pressure inside the container?

Do not let chemistry questions SCARE you!  The TOTAL means

ADD THEM UP.

You can do this without a scientific calculator :-)

0.50 +0.30 + 0.40 = 1.20 atm

Remember these followings :-

Acid + Base = salt + water

Acid + metal = salt + hydrogen

Acid + carbonates = salt + water + carbon dioxide

Base + ammonium salt = salt + ammonia + water

Base + acidic oxide = salt + water

I hope that you will be clear via these formulas.

Answer:

1 colonists

2 England

3 slaves

4 the House of Burgesses

Answer:

:)

Explanation:

Answer:

pro ca help defeat diseases, con the stem cell might cause harm

Explanation:

The stem cells are used in regenerative medicine to reproduce the body organs and replace the damaged orangs. The disadvantage of stem cells is that it is difficult to culture the stem cells, and they can be transformed into cancerous cells.

Embryonic stem cells can be described as pluripotent stem cells derived from the inner cell mass of a blastocyst. Human embryos can reach the blastocyst stage 4 to 5 days post fertilization, at which time they contain 50 to 150 cells.

Isolating the inner cell mass using immunosurgery results in the destruction of the blastocyst, a process that raises ethical issues,  at the pre-implantation stage have the same moral considerations as embryos in the post-implantation stage of development.

Potential uses of stem cells include the treatment of diabetes and heart disease. The cells are being analyzed or studied to be used in clinical therapies, genetic disorders, and cellular/DNA repair. However, adverse effects in the research processes and clinical processes such as tumors and unwanted responses have been reported.

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Answer:

2 Hydrogen atoms and 1 Oxygen atoms makes water

Explanation:

Hope this helps^^

Answer: Its chemical formula H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms,

Explanation: i hopes it helps :)

Explanation:

I'm sorry if this doesn't answer this correctly but solid liquid solider solid liquid/solid

Answer:

its c  I truly believe that it is c

Explanation:

Answer:

D: Na

Explanation:

Hope this helps!

Have a nice day!!

:D

Answer:

i have no clue

Explanation:

umm cause i have no clue sorry lol but good luck

Answer:

D

Explanation:

Heterogeneous mixture is a mixture of non-uniform composition & in which the components can be easily identified

Answer:

Soil

Explanation:

Soil is made up of many things (therefore it's not pure) and does not appear to be uniform; it does not look the same throughout. Therefore it is heterogeneous.

Answer:

Explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

From the question we have

PE = 3 × 9.8 × 12.5 = 367.5

We have the final answer as

Hope this helps you

The empirical formula of a compound that consists of 0.039 moles of iron atoms combined with 0.052 moles of oxygen atoms is FeO[tex]\rmFeO_{2}[/tex].

The simplest whole number ratio of atoms in a compound is the empirical formula of a chemical compound in chemistry. Sulfur monoxide's empirical formula, SO, and disulfur dioxide's empirical formula are two straightforward examples of this idea.

The simplest whole number ratio of each type of atom in a compound is its empirical formula. It can be determined from data on the mass of each component in a compound or from the composition's proportion.

calculation:

Fe = 56/0.039 = 150

O = 16/0.052 = 300

in simplest term ratio is 1:2

Thus, empirical formula is FeO[tex]\rmFeO_{2}[/tex].

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Answer:

in the periodic table we can see that the ions of Cl is greater than the ions in Na

Cl- ion is bigger than Na+ ion because of the presence of more number of electrons.

The atomic number of sodium+ ion is 10 means it has 10 number of electrons which can accommodate into 2 shells or orbits while on the hand, chlorine- ion has atomic number 18 means it has 18 number of electrons which can be accommodate into 3 shells or orbit.

So there is one shell more in chlorine ion as compared to sodium ion which make the size of chlorine ion large so we can conclude that chlorine ion is bigger than sodium ion.

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Answer:

In Iron (II) oxide, ratio is 1:1

In iron (III) oxide, ratio is 4:2

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In Iron (II) oxide, ratio is 1:1

Iron oxides are very important components in most soils as they have major influence on chemical, physical, and microbial properties of soils. Because of their nanoparticulate size (usually 5-200 nm), iron oxides possess large specific surface area.

Generally, iron oxides are prevalent, widely used as they are inexpensive, and play an imperative role in many biological and geological processes. They are also extensively used by humans, eg, as iron ores in thermite, catalysts, durable pigments.

When iron is exposed to moisture or oxygen, oxidation occurs. During this chemical reaction, iron is converted into iron oxide. The iron oxide typically has a reddish, flaky appearance that becomes progressively worse over time.

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Answer:

looo

rdyxvxkxkvxkgxkgdkvx

Explanation:

lolollkvvbffffkhdhlxkgzfjzufsfjsdhayzyrzruzruzufzktzkgdjfdufskdgjgzjfgkzjgskf

The compound formed is the quaternary ammonium salt N,N,N-trimethyl-1-phenylmethanaminium iodide.

Quaternary ammonium salts are formed when methyl iodide reacts with an amine. The quaternary ammonium salt is an ionic substance which often has a high melting point. Remember that the melting point of a substance can be used to identify the substance.

In this case, a student reacted 40 drops of an unknown amine with 20 drops of iodomethane in 2 ml of a suitable solvent mixture. after 15 minutes of reaction, a white precipitate formed. the precipitate was isolated and its melting point was recorded to be 178 °c. This precipitate must be N,N,N-trimethyl-1-phenylmethanaminium iodide (Benzyltrimethylammonium iodide) because it is a quaternary ammonium salt whose melting point is 178 °c.

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Answer:

whatttttttttttttttttttttttt

Answer:

Breaking glass - chemical change

popsicle - physical

milk - chemical

bread - physical

roasting - chemical

egg - chemical

fireworks - chemical

mixing something with water - chemical

popcorn - chemical

colouring hair - physical

melting chocolate - physical

crumpled paper - physical

rusted nails - chemical

crushed can - physical

cooked egg - chemical

bending metal - physical

melting ice - physical

bleaching clothes - chemical

If u want to differentiate between chemcial and physical change u need to remember this-

physical change - no new substance is formed (Even for melting of ice it's still water) and it can be reversible, except for some cases like tearing of paper

chemical change - a new substance is formed

Answer:

the answer is A

Explanation:

in 60 seconds there is 1 minute and in 60 minutes there is one hour

Answer:

human migration

Explanation:

Answer:

I think its D

Explanation:

Answer: The condensation is the process which causes distance.