What are new substances formed in a chemical reaction called?​

Answer: B

Explanation: trust me

Answer:

the yeast did not produce the carbon dioxed needed for the bread to rise.

Explanation:

i am not fooly sure but i think its it

but warn me if i am wrong pweez

Answer: 4

Explanation: Your counting 4 for each interval. 9+4 =13 13+4 =17 17+4 =21 and so on.

Answer:

1.209g of MgO participates

Explanation:

In this problem, we have 0.030 moles of MgO that participates in a particular reaction.

And we are asked to solve for the mass of MgO that participates, that means, we need to convert moles to grams.

To convert moles to grams we need to use molar mass of the compound:

1 atom of Mg has a molar mass of 24.3g/mol

1 atom of O has a molar mass of 16g/mol

That means molar mass of MgO is 24.3g/mol + 16g/mol = 40.3g/mol

And mass of 0.030 moles of MgO is:

0.030 moles MgO * (40.3g/mol) =

Answer:

18- H

19- D

20-G

21-A

(i think these are the answers)

Explanation:

Answer:

CO2

Explanation:

Answer:

Ionic compounds are neutral compounds made up of positively charged ions called cations and negatively charged ions called anions. For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion.

Explanation:

Hope this helps.

Answer:

Mass = 32 g

Explanation:

Given data:

Number of moles of oxygen = 1.0 mol

Mass of oxygen = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of oxygen (O₂) is  32 g/mol

by putting values,

1.0 mol = mass/ 32 g/mol

Mass = 1.0 mol ×32 g/mol

Mass = 32 g

Answer:

Drought

Explanation:

It would get really dry because no moisture and the lakes would dry up bc of lack of water

Answer:

i THINK so

Explanation:

im not sure tho sorry if wrong

Answer: There are two types of crust; oceanic and continental. Oceanic crust is denser and thinner and mainly com​posed of basalt.

Explanation:

The crust This is the outside layer of the earth and is made of solid rock, mostly basalt and granite.  Oceanic crust is denser and thinner and mainly com​posed of basalt.

Answer:

The crust and the upper layer of the mantle together make up a zone of rigid, brittle rock called the Lithosphere .

Explanation:

Answer:

Mass = 2.16 g

Explanation:

Given data:

Number of molecules of F₂ = 3.45 × 10²²

Mass in gram = ?

Solution:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules

3.45 × 10²² molecules ×1 mol / 6.022 × 10²³ molecules

0.57× 10⁻¹  mol

0.057 mol

Mass in gram :

Mass = number of moles × molar mass

Mass = 0.057 mol × 37.9 g/mol

Mass = 2.16 g

Answer: Thus [tex]\Delta H[/tex] for the conversion of gray tin to white tin is -20.9 kJ

Explanation:

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

According to this law, enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

The final reaction is

[tex]Sn(s, gray)\rightarrow Sn(s, white)[/tex]  [tex]\Delta H=?[/tex]

The intermediate balanced chemical reaction will be,

[tex]Sn(s, gray)+O_2(g)\rightarrow SnO_2(g)[/tex]  [tex]\Delta H^0=-582.78kJ[/tex]    (1)

[tex]Sn(s, white)+O_2(g)\rightarrow SnO_2(g)[/tex]  [tex]\Delta H^0=-580.69kJ[/tex]     (2)    

substarcting (2) form (1) we get

[tex]\Delta H=\Delta H_1-\Delta H_2[/tex]

[tex]\Delta H=-582.78-(-580.69kJ)[/tex]

[tex]\Delta H=-20.9kJ[/tex]

The number of the ions or the electrons transferable is called the number of equivalents. The number of equivalents of 0.70-mole iron (Fe³⁺) is 2.1 eq.

The number of equivalents is the property of the atom, molecule, or compound to transfer its ions or electrons in a chemical reaction. The equivalents can be said to be the moles of the ions with a valency of one to neutralize the oppositely charged species.

The number of equivalents is calculated as,

Number of equivalents = number of moles × valence

Given,

Valency of iron (Fe³⁺) = +3

Number of moles of iron = 0.70 moles

Substituting values above to calculate equivalents as

Number of equivalents = 0.7 × 3

Number of equivalents = 2.1 eq

Therefore, there are 2.1 equivalents in 0.70 moles of iron.

Learn more about equivalents here:

https://brainly.com/question/11186210

#SPJ2

Answer:

I think the answer is letter C

Look at my screenshot:

Answer:

249 K

Explanation:

Step 1: Given data

Step 2: Calculate the moles corresponding to 4.03 g of nitrogen

The molar mass of N₂ is 28.01 g/mol.

4.03 g × 1 mol/28.01 g = 0.144 mol

Step 3: Calculate the temperature of the gas sample

We will use the ideal gas equation.

P × V = n × R × T

T = P × V / n × R

T = 3.19 atm × 0.921 L / 0.144 mol × 0.0821 atm.L/mol.K

T = 249 K

Answer:

Your body needs to keep a core temperature of about 98.6°F (36.9°C). To prevent hypothermia and other consequences of a chilled core, your brain monitors temperature very closely.

Explanation:

Answer:

Mass = 61.6 g

Explanation:

Given data:

Mass of ammonia produced = 75.0 g

Mass of nitrogen needed = ?

Solution:

Chemical equation:

N₂ + 3H₂    →      2NH₃

Number of moles of ammonia:

Number of moles = mass/molar mass

Number of moles = 75 g/ 17 g/mol

Number of moles =  4.4 mol

No we will compare the moles of ammonia with nitrogen.

              NH₃           :          N₂

                2             :           1

               4.4           :          1/2×4.4 =2.2 mol

Mass of N₂:

Mass = number of moles × molar mass

Mass = 2.2 mol × 28 g/mol

Mass = 61.6 g

Answer:

Explanation:

I hope this helps xD

Answer:

Electrical energy is used to power up a light bulb. The current moves from the outlet to the light bulb through the wire.

Lightning is another example of electrical energy. The negatively charged particles are separated from the positively...

Batteries are also sources of electrical energy. In car batteries, the moving charges Explanation:

fI gave u 3 think of the 4th one

Answer:

The main purpose for converting numbers into scientific notation is to make calculations with surpisingly large or small numbers less complicated. Since zeros are not used to place the decimal point, all of the digits in a number in scientific notation are meaningful and easier to read. Hope this helps!

Explanation:

The empirical formula of vitamin A : C₂₀H₃₀O

The empirical formula is the smallest comparison of atoms of compound =mole ratio of the components

The principle of determining empirical formula

mol ratio of C : H : O ⇒

[tex]\tt \dfrac{83.85}{12}\div \dfrac{10.56}{1}\div \dfrac{5.58}{16}\\\\6.9875\div 10.56\div 0.34875\rightarrow divide~by~smallest(0.34875)\\\\20\div 30\div 1[/tex]

The question is incomplete, the complete question is;

Chlorine monoxide accumulates in the stratosphere above Antarctica each winter 3nd plays a key role the formation of the ozone hole above the South Pole each spring Eventually. CIO decomposes acco to the equation: 2CIO(g) rightarrow CL2(g) + O2(g) The second-order rate constant for the decomposition of CIO is 6950000000 M-1 s-1 at a particular temperature Determine the half-life of CIO when its initial concentration is .0000000185 M

Answer:

7.8 * 10^-3 s

Explanation:

Given that the half life of a second order reaction is obtained from the formula;

t1/2 = k-1[A]o-1

t1/2 = 1/k[A]o

second order rate constant (k) = 6950000000 M-1 s-1

initial concentration ([A]o) =0.0000000185 M

t1/2 = 1/6950000000 * 0.0000000185

t1/2 = 7.8 * 10^-3 s

Answer:

Following are the solution to this question:

Explanation:

Evaporate involves pushing to liquid from either a liquid phase. It's used passively, like in the overnight loss of moisture, and aggressively, as in the substrate loss of moisture by the light. The vaporized water is coming from the sea, but only 77% of the precipitation occurs and over the ocean as well as the remaining rain falls over land. Groundwater and rainwater are the primary sources of water.

Answer: The answer is decomposition reaction

Explanation: Hope this helps:)

Answer: D. decomposition reaction

Explanation:

Answer:

My wife and I just visited the City of Baguio for a week. We stayed at the Hotel Supreme Convention, which was very nice. We ate dinner at some really nice places: Mario's (expensive), Don Henrico's (mid), and Good Taste (cheap). We found a nice bar called the Old Bohemian for good live music. We ventured out toward Camp John Hay a couple of times for shopping(the commissary is a tourist trap with retail prices). We also did some street shopping.

Explanation:

My wife and I just visited the City of Baguio for a week. We stayed at the Hotel Supreme Convention, which was very nice. We ate dinner at some really nice places: Mario's (expensive), Don Henrico's (mid), and Good Taste (cheap). We found a nice bar called the Old Bohemian for good live music. We ventured out toward Camp John Hay a couple of times for shopping(the commissary is a tourist trap with retail prices). We also did some street shopping.

Answer:

Explanation:

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If you lived in Manila or Baguio, how would your weight change? It would probably depend on what they are eating, how long they exercise, but not living in a different place, right? This is mind - boggling and i don't know what you mean or if you're asking a different question.

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Hope this helps! <3

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Explanation:

Hi! I don't know why I am not getting any brainliest answer and if you are kind enough could you please mark me as the brainliest answer and please follow me also.

Answer: H2O and NH3 are polar molecules. H2 is a nonpolar molecule but the H-H bond is also nonpolar.

Therefore, the best choice is CCl4. Although the C-Cl bond is polar due to electronegativity differences, the molecule itself is nonpolar because the net dipole moments cancel out, given its tetrahedral molecular structure.

Explanation: