24897Bk ---> 24797Bk + 10n + _____

Explanation:

1.39/0.25 * 100% = 5.56%

Answer:

Great question, here are a few! (╯°▽°)╯ ┻━┻

Explanation:

1. Atmosphere, The first difference between the Earth and space is the atmosphere.

2. radiation (high level of dangerous particles)!

3. gravity (weightlessness in space)

Answer:

The desert was one covered by ocean water.

Explanation:

Answer:

C. decrease

Explanation:

Price increases on goods in the economy signal producers to decrease production.

Producers benefits more when the price of goods and services increases in the market. This makes them have more profit.

To maintain this profit level, they often decrease their production output to create a form of artificial scarcity within the market to sustain the price at which their goods trades.

Answer:

C

Explanation:

edge 2021

Answer:

6

Explanation:

The given reaction is aluminium with hydrochloric acid

2Al + 6HCl → 2AlCl3 + 3H2

the product is aluminium chloride and hydrogen gas.

We can clearly, calculate that there are 2*3=6 chlorine atoms in product side of the reaction.

Answer:

C. 6

Edg2021

Explanation:

Person is right.

Answer:

The five basic types of chemical reactions are combination, decomposition, single-replacement, double-replacement, and combustion. Analyzing the reactants and products of a given reaction will allow you to place it into one of these categories. Some reactions will fit into more than one category.

Answer:

SEE BELOW HEHEHE YOURE WELCOME

Explanation:

Types of Chemical Reactions

The purpose of this experiment was to make observations of the reactants and products and then later use this information to write a balanced chemical equation. My question before this experiment was how will the reactants affect the products. The hypothesis I made before this experiment was that based off of the materials being used, a gas will form, and so will a solid. I still do not know what the variables are in this experiment such as the independent or dependent.

The materials used in this experiment were:

Bunsen Burner

Striker

Tongs

Test Tube

Test Tube Rack

Test Tube Holder

Spatula

Sand Paper

Transfer Pipette

Tweezers

Evaporating dish

The substances used in this experiment were:

Copper wire

Sodium carbonate

Copper sulfate

Potassium iodide

Lead nitrate

Zinc

In this experiment we started off by placing about 20 drops of copper sulfate solution into a test tube and then put zinc into the test tube and watched it as single replacement occurred and zinc sulfate was the product.Next we put 10 drops of potassium iodide into another test tube and 10 drops of lead nitrate into a separate test tube. Then we added the lead nitrate into the potassium iodide and watched as double replacement occurred as lead iodide formed and potassium nitrate formed as well. Next, I sanded down a piece of 3-inch copper wire until it was shiny and watched as combustion and synthesis occurred when we held the piece of copper over a bunsen burner. Copper oxide was found formed on the wire. The other reactant in this equation was oxygen gas. After this, we used a small spatula to place about half an inch of sodium carbonate in a clean test tube and then heated the tube over the flame and watched as decomposition took place and carbon dioxide was released. The reaction was a gas formation and 2 products were formed. This was the lab experiment.

Based on this experiment and my hypothesis made beforehand, my hypothesis was almost correct other than the fact that I did not think that color change would occur so I was surprised by that. But other than that, my data did support my hypothesis showing that a gas and a solid were formed in two different ways. One error I made was when I was recording the data in a data table, I did not notice a color change at first but I rewatched the experiment. One way that I could have improved this lab investigation was pay more attention to the precise details because those make a huge difference.

Answer:

cellular respiration takes place

Answer:

sunlight is absorbed to produce energy

Sorry if its worng

Answer:

[tex]\boxed {\boxed {\sf 29.4 \ Joules }}[/tex]

Explanation:

Gravitational potential energy can be found using the following formula.

[tex]PE_g= m*g*h[/tex]

When m is the mass, g is the gravitational acceleration, and h is the height.

The book has a mass of 2 kilograms. It's height is 1.5 meters above the ground. Assuming this is on Earth, the gravitational acceleration is 9.8 m/s².

[tex]m= 2 \ kg \\h= 1.5 \ m \\g= 9.8 \ m/s^2[/tex]

Substitute the values into the formula.

[tex]PE_g=2 \ kg * 1.5 \ m * 9.8 \ m/s^2[/tex]

Multiply the first two numbers together.

[tex]PE_g=(3.0 \ kg*m)( 9.8 \ m/s^2)[/tex]

Multiply again.

[tex]PE_g=29.4 \ kg*m^2/s^2[/tex]

[tex]PE_g= 29.4 \ J[/tex]

The gravitational potential energy of the book is 29.4 Joules.

Answer:

[tex]CH _{4}+ 2O _{2} → CO _{2} + 2H _{2}O[/tex]

for the balanced equation

[tex]from \: the \: equation \\ 1 \: mole \: of \: methane \: gives \: 1 \: mole \: of \: carbon \: dioxide \\ 7.4 \: moles \: of \: carbon \: dioxide \: will \: be \: given \: by \: (7.4 \times 1)moles \: of \: methane \\ = 7.4\: moles \: of \: methane \\ \\ since \: moles \: of \: oxygen \: double \: those \: of \: methane \\ moles \: of \: oxygen \: = 7.4\times 2 \\ = 14.8 \: moles \: of \: oxygen[/tex]

Answer:

B. Unbalanced

Explanation:

I learned this in 8th grade.

:))) This is the right answer.

The balanced equation

2NaNO₃ + PbO → Pb(NO₃)₂ + Na₂O

Given

Reaction

NaNO3 + PbO → Pb(NO3)2 + Na2O

Required

Balanced equation

Solution

aNaNO₃ + bPbO → Pb(NO₃)₂ + cNa₂O(Pb(NO₃)₂ ⇒coefficient 1 for the most complex compounds)

N, left=a, right=2⇒a=2

Na, left = a, right=2c⇒a=2c⇒2=2c⇒c=1

Pb, left = b, right=1⇒b=1

The equation becomes :

2NaNO₃ + PbO → Pb(NO₃)₂ + Na₂O

Answer:

colourless

Explanation:

hope it helps

34.5 grams

because the mass would multiply and do mass things

Well, simply put,

There is no Hydrogen Chloride being produced from this reaction, but instead it's Ammonium Chloride.

Answer:

B - migration of animals

Weathering of rocks will contribute most to the development of soil.

Weathering is the process in which rock particles are broken down into

smaller parts.

The smaller parts results in soil formation and is carried out through

physical and chemical factors.

The physical factors include:

The chemical factors include:

Read more about Weathering here https://brainly.com/question/829782

Answer:

[tex]P_2=3312torr[/tex]

Explanation:

Hello!

In this case, since here we have a pressure-temperature relationship, we need to use the Gay-Lussac's law in order to compute the final pressure as they are in a directly proportional relationship:

[tex]\frac{P_2}{T_2} =\frac{P_1}{T_1}\\\\P_2= \frac{P_1T_2}{T_1}[/tex]

Now, we plug in the given pressure and temperatures in Kelvins to obtain:

[tex]P_2= \frac{1307torr*(477+273)K}{(23+273)K}\\\\P_2=3312torr[/tex]

Best regards!

Answer:

9584738373848838e7e8e

Answer:The alpha particles that were fired at the gold foil were positively charged. ... These experiments led Rutherford to describe the atom as containing mostly empty space, with a very small, dense, positively charged nucleus at the center, which contained most of the mass of the atom, with the electrons orbiting the nucleus.

Explanation:Thomson's cathode ray experiment and Rutherford's gold foil experiment. ... that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. ... mass of each particle was much, much smaller than that of any known atom. ... Why did Thomson conclude that electrons could be found in atoms of all elements?

Answer:N-1

             H-3

             C-1

             H-4

Explanation:Nitrogen-1,Hydrogen-3(Ammonia),Carbon-1,Hydrogen-4(Methane).

Answer:

As 33

Explanation:

Symbol: As

Atomic Number/ Number of Protons: 33

Answer:

Your answer would be 2

Explanation:

The electron configuration for titanium is 1s22s22p63s23p63d24s2, according to the Jefferson Lab website. The element's 22 electrons are arranged in four energy levels surrounding the nucleus of the atom.

Electrons orbit the nucleus in energy levels, which are also called shells. These energy levels contain sub-shells, or orbitals, each of which holds a certain number of electrons. By looking at the electron configuration for titanium, it is possible to determine how its electrons are arranged.

There are two electrons in the s orbital of the first energy level. The second level contains eight electrons, with two in the s orbital and six in the p orbital. There are electrons in three orbitals of the third energy level. There are two in the s orbital, six in the p orbital and two in the d orbital. The fourth energy level has two electrons in its s orbital.

The study of chemicals and bonds is called chemistry.

The correct answer is 2.

The representation of electrons in the shell is called electronic configuration.  The electron configuration for titanium is [tex]1s^22s^22p^63s^23p^63d^24s^2[/tex],

Electrons orbit the nucleus in energy levels, which are also called shells.

These energy levels contain as follows:-

Each of which holds a certain number of electrons. By looking at the electron configuration for titanium, it is possible to determine how its electrons are arranged.  There are two electrons in the s orbital of the first energy level. The second level contains eight electrons, with two in the s orbital and six in the p orbital.

There are electrons in three orbitals of the third energy level. There are two in the s orbital, six in the p orbital, and two in the d orbital. The fourth energy level has two electrons in its s orbital.

Hence, the correct answer is A that is 2.

For more information, refer to the link:-

https://brainly.com/question/12985618

Answer:

copper has 2+ ions in a sample of copper

Answer:

Explanation:

When group 7 elements react , their atoms  gains  one  electron into their highest occupied  energy level ( outer shell) to form single negative - charged ion .

As you move down the group , the outer shells get increased  i.e an additional electron shell is added  thereby increasing the atomic radius  of the atom.  The electrons in the outer shell move further away from the nucleus as we go down the group .

Therefore the force of  attraction  between the shells and nucleus is decreased .

This makes attracting an extra electron difficult  . And so ability of the atom to attract electron to fill the outermost shell reduces which means the   reactiveness of the atom reduces.

Answer:1925ml

Explanation:

Do not quote me on this but with boyles law in mind as pressure tends to increase the volume of the container decreases. So I believe that you would need to multiply 550ml by the 3.5atm because p1v1=p2v2 so they both end up with the same end answer and if the pressure is 1.0atm then the answer would maybe be 1925ml. since 1*1925ml =1925ml and 3.5atm*550=1925ml (there is always a possibility this is wrong though)

Answer: the picture shows work for number 1,2,4,5,7

Explanation: number 3: as the pressure in the volume decreases, the volume increases causing it to expand and eventually blow.

number 6: because the temperature and the amount of gas don’t change, these terms don’t appear in the equation. What Boyle’s law means is that the volume of a mass of gas is inversely proportional to its pressure. This linear relationship between pressure and volume means doubling the volume of a given mass of gas decreases its pressure by half.

hope this helps :))

Answer:

B. fermentation

Explanation:

this process is called lactic fermentation where a molecule of gluclose(C6H12O6) is turned into two molecules of pyruvate(C3H4O3) and the pyruvate molecules are turned into lactic acid(C3H6O3) from this process two molecules of ATP are resulted

Answer:

Fermentation

Explanation: I took the test

Answer: [tex]2Ag^{+}(aq)+CO_3^{2-}(aq)\rightarrow Ag_2CO_3(s)[/tex]

Explanation:

Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.

The given chemical equation is:

[tex]2AgF(aq)+Na_2CO_3(aq)\rightarrow Ag_2CO_3(s)+2NaF(aq)[/tex]

The complete ionic equation is;  

[tex]2Ag^{+}(aq)+2F^-(aq)+2Na^+(aq)+CO_3^{2-}(aq)\rightarrow Ag_2CO_3(s)+2Na^+(aq)+2F^-(aq)[/tex]

The ions which are present on both the sides of the equation are [tex]Na^+[/tex] and [tex]F^-[/tex] and are not involved in net ionic equation.

Hence, the net ionic equation is :

[tex]2Ag^{+}(aq)+CO_3^{2-}(aq)\rightarrow Ag_2CO_3(s)[/tex]

1. Heat needed = 293.25 J

2. Time to leave : 2 s

Given

1.5 g H2

Cp H2 = 14.27 g/J C

Δt= 13.7

Required

1. Heat needed

2. Fridge time

Solution

1. Heat can be formulated :

Q = m.c.Δt

Q = 1.5 x 14.27 x 13.7

Q = 293.25 J

2. Heat decreases = 150 J/s, so for 293.25 J :

[tex]\tt t=\dfrac{293.25~J}{150~J/s}=1.955~s\approx 2~s[/tex]

Answer:

Cl2, Chlorine molecule has a boiling point closest to that of argon.

This is because Chlorine is made up of discrete and simple molecules making up a simple molecular structure. The molecules associate through weak van der waal's forces of attraction hence low boiling point.

HCl has strong hydrogen bonds.

F2 is very small hence strong forces of attraction.

HF has strong hydrogen bonds

Mercury, Venus, Earth,Mars

Answer:

D: Mercury, Venus, Earth, Mars

Explanation: