WILL GIVE BRAINLIEST
During an endothermic reaction, H for the reactants was −600 kJ/mol. Which of the following statements is correct about the H for the products the comparison of the energy in bonds? (5 points)
It is less than −600 kJ/mol, and the amount of energy required to break bonds is greater than the amount of energy released in forming bonds.
It is less than −600 kJ/mol, and the amount of energy required to break bonds is less than the amount of energy released in forming bonds.
It is greater than −600 kJ/mol, and the amount of energy required to break bonds is greater than the amount of energy released in forming bonds.
It is greater than −600 kJ/mol, and the amount of energy required to break bonds is less than the amount of energy released in forming bonds.

Answer:

ZnSO4 + 2LiNO3 → Zn(NO3)2 + Li2SO4

Explanation:

There's many resources on web that can assist you with this concept:

https://en.intl.chemicalaid.com/tools/equationbalancer.php

https://www.webqc.org/balance.php

Answer:

The estimated atomic of silicon is 28.082 a.m.u.

Explanation:

The estimated atomic mass of silicon ([tex]M_{Si, est}[/tex]), in a.m.u., is equal to the weighted average of atomic masses of silicon available in nature and in terms of their abundances:

[tex]M_{Si, est} = r_{1}\cdot M_{Si-28} + r_{2} \cdot M_{Si-29} + r_{3}\cdot M_{Si-30}[/tex] (1)

Where:

[tex]r_{1}[/tex], [tex]r_{2}[/tex], [tex]r_{3}[/tex] - Relative abundance of each isotope, no unit.

[tex]M_{Si-28}[/tex], [tex]M_{Si-29}[/tex], [tex]M_{Si-30}[/tex] - Atomic mass of each isotope, in a.m.u.

If we know that [tex]M_{Si-28} = 27.976\,a.m.u.[/tex], [tex]M_{Si-29} = 28.976\,a.m.u.[/tex], [tex]M_{Si-30} = 29.974\,a.m.u.[/tex], [tex]r_{1} = \frac{92.22}{100}[/tex], [tex]r_{2} = \frac{4.68}{100}[/tex] and [tex]r_{3} = \frac{3.09}{100}[/tex], then the estimated atomic mass of silicon is:

[tex]M_{Si, est} = r_{1}\cdot M_{Si-28} + r_{2} \cdot M_{Si-29} + r_{3}\cdot M_{Si-30}[/tex]

[tex]M_{Si,est} = \left(\frac{92.22}{100} \right)\cdot (27.976\,a.m.u.) + \left(\frac{4.68}{100} \right)\cdot (28.976\,a.m.u.) + \left(\frac{3.09}{100} \right)\cdot (29.974\,a.m.u.)[/tex]

[tex]M_{Si, est} = 28.082\,a.m.u.[/tex]

The estimated atomic of silicon is 28.082 a.m.u.

[tex]\huge\mathsf{\red{\underline{\underline{Answer}}}}[/tex]

[tex]{\green{\dashrightarrow}}[/tex]Metals such as iron, zinc, lead, copper, etc., are in the middle of the reactivity series. These are moderately reactive metals and are usually present as sulphides or carbonates. A metal is obtained from its ore by the processes of reduction or by electrolysis.

Answer:

because of heat and pressure

Answer:

I am giving u some explanation related this question pls see that

it may help u

Explanation:

The pH scale measures how acidic an object is. Objects that are not very acidic are called basic. The scale has values ranging from zero (the most acidic) to 14 (the most basic). As you can see from the pH scale above, pure water has a pH value of 7. This value is considered neutral—neither acidic or basic. Normal, clean rain has a pH value of between 5.0 and 5.5, which is slightly acidic. However, when rain combines with sulfur dioxide or nitrogen oxides—produced from power plants and automobiles—the rain becomes much more acidic. Typical acid rain has a pH value of 4.0. A decrease in pH values from 5.0 to 4.0 means that the acidity is 10 times greater.

How pH is Measured

There are many high-tech devices that are used to measure pH in laboratories. One easy way that you can measure pH is with a strip of litmus paper. When you touch a strip of litmus paper to something, the paper changes color depending on whether the substance is acidic or basic. If the paper turns red, the substance is acidic, and if it turns blue, the substance is basic

Answer:   A process of cooking food in a pot made from unglazed and natural clay. coddling: Heating food in water kept just below the boiling point.

Explanation:

Answer:reflection

Explanation:

Answer:

Maritime tropical air mass

Continental polar air mass

Answer:

mass no = A

Atomic number = Z= no of protons

Neutron = n

n = A-Z

n= 35- 17

   = 18

Explanation:

Answer:

"hydrogen to oxygen"

Explanation:

Hydrogen bonds are formed when hydrogen is bonded to highly electronegative element such as Chlorine, fluorine, oxygen etc.

In hydrogen bonding, the hydrogen atom of one molecule of water is attracted to the oxygen atom of another molecule of water via permanent dipole-dipole interaction.

Hence, If you have 2 water molecules together, they always sit "hydrogen to oxygen" as a result of dipole - dipole interaction and  hydrogen bonding between water molecules.

Answer:

HCl

H3PO4

Explanation:

The formula of hydrochloric acid is HCl. It contains one hydrogen and one chlorine atom. And thus all other options with O is wrong and option C is correct.

What is hydrochloric acid?

Hydrochloric acid is a strong acid having the formula HCl. Thus one mole of hydrochloric acid contains one hydrogen atom and one chlorine atom. No other elements such as oxygen is present in it.

The electronegativity of chlorine is very higher compared to hydrogen  and they attracts by hydrogen bond. Each atom shares one electron with the other atom and thus it can also said as they are covalently bonded.

Hydrochloric acid is used in many industrial uses and it is present even in our stomach to aid digestion. Since it is very strong acid it may cause sever damages to skin if and its vapor causes respiratory issues when comes in contact.

Therefore, the correct formula of hydrochloric acid is HCl, option C is correct.

To find more about HCl, refer the link below:

https://brainly.com/question/24177034

#SPJ5

Answer: The mass of barium nitrate required is 23.91 g

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]    ......(1)

Given mass of sodium phosphate = 10.0 g

Molar mass of sodium phosphate = 163.94 g/mol

Plugging values in equation 1:

[tex]\text{Moles of sodium phosphate}=\frac{10.0g}{163.94g/mol}=0.061 mol[/tex]

The chemical equation for the reaction of sodium phosphate and barium nitrate follows:

[tex]3Ba(NO_3)_2+2Na_3PO_4\rightarrow Ba_3(PO_4)_2+6NaNO_3[/tex]

By the stoichiometry of the reaction:

If 2 moles of sodium phosphate reacts with 3 moles of barium nitrate

So, 0.061 moles of sodium phosphate will react with = [tex]\frac{3}{2}\times 0.061=0.0915mol[/tex] of barium nitrate

Molar mass of barium nitrate = 261.337 g/mol

Plugging values in equation 1:

[tex]\text{Mass of barium nitrate}=(0.0915mol\times 261.337g/mol)=23.91g[/tex]

Hence, the mass of barium nitrate required is 23.91 g

Answer:

[tex]\Delta H=-92.7kJ[/tex]

Explanation:

Hello there!

In this case, according to the given information, we can infer that 890 kJ of energy are released when 1 mole of methane is burned; however, to find the total heat when 1.67 grams are burned, we first need to calculate the moles in this mass of methane:

[tex]1.67gCH_4*\frac{1molCH_4}{16.04gCH_4}=0.104molCH_4[/tex]

And thus, for calculating the resulting ∆H, we proceed as follows:

[tex]\Delta H=-890kJ/mol*0.104mol\\\\\Delta H=-92.7kJ[/tex]

Regards!

Answer:

electric is your answer :)

Explanation:

Edge STEM instruction/assignment perhaps???

Answer:

A. C (alternate current)

Answer:

m = 43.87 grams

Explanation:

Given that,

Number of moles, n = 1.29 moles

The molar mass of H₂O₂ is, M = 34.0147 g/mol

We know that,

[tex]n=\dfrac{m}{M}[/tex]

Where

m is mass of H₂O₂

So,

[tex]m=n\times M\\\\m=1.29\times 34.0147 \\\\m=43.87\ g[/tex]

So, there are 43.87 grams of H₂O₂.

Answer:A

Explanation:

Answer:

https://socratic.org/answers/220339

this is the answer , my grandpa create this page

Explanation:

Answer:

pH = 4

Explanation:

Given that,

The concentration of [H⁺] is [tex]10^{-4}\ M[/tex]

We need to find the pH of the solution. We know that,

[tex]pH=-log[H^+][/tex]

Also,

HNO3 → H+ + NO-3

Put all the values,

[tex]pH=-log[1\times 10^{-4}]\\\\pH=4[/tex]

So, the pH of the solution is equal to 4.

Answer:

Humans convert virtually all direct and indirect impressions into symbols. The symbols that humans create are words. Every word consists of two components, a denotative and a connotative (for a complete discussion of denotation and connotation see Chapter 7, THE POWER OF WORDS).

Explanation:

Answer:

Humans convert virtually all direct and indirect impressions into symbols. The symbols that humans create are words. Every word consists of two components, a denotative and a connotative (for a complete discussion of denotation and connotation see Chapter 7, THE POWER OF WORDS).

Explanation:

Answer:

Ok so hot u hahaha

Explanation:

Hshshhdhdi jsushshshshshhdhdhd hshshshshsh hdhdhdhd hdhdhdhd hdhdh

Answer:

In the Celsius scale each degree is one part of 100 degrees. This is because in this scale the difference between boiling and freezing temperatures of water is 100 ° - 0 ° = 100 °, so one degree Celsius is one part of 100.

In the Farhenheit scale, each degree is one part of 180 degrees. This is because in this scale the difference between the boiling and freezing temperatures are 212 ° - 32 ° = 180°, so one degree Fahrenheti is one part of 180.

That means that 1 °C is a larger amount than 1 °C, so 20°C is a larger amount than 20°F.

Conclusion: 20 degree change represents a larger change in Celsius scale.

Explanation:

In the Celsius scale each degree is one part of 100 degrees. This is because in this scale the difference between boiling and freezing temperatures of water is 100 ° - 0 ° = 100 °, so one degree Celsius is one part of 100.

In the Farhenheit scale, each degree is one part of 180 degrees. This is because in this scale the difference between the boiling and freezing temperatures are 212 ° - 32 ° = 180°, so one degree Fahrenheti is one part of 180.

That means that 1 °C is a larger amount than 1 °C, so 20°C is a larger amount than 20°F.

Conclusion: 20 degree change represents a larger change in Celsius scale.

Answer:

78° C.

Explanation:

The final temperature of water is 81℃ , if it is allowed to cool from a temperature of 95  and  it releases heat of 1200J.

In the following question we will apply specific heat Capacity equation

q=mct Δt

q= 1200J   m= 20 g c= 4.186  T₁= 95 ℃

1200= 20 ✕4.186(95-T₂)

T₂=81℃

Hence, The water cools to 81℃ temperature

Learn about specific heat capacity

https://brainly.com/question/1747943

#SPJ2

Answer:

OK i see

Explanation:

Answer:

The key to chemistry is to change everything to moles. Then when you have the answer in moles change the answer back to grams, liters, or whatever you want.

change 25 grams of potassium chlorate to moles.

calculate the gram molecular mass of potassium chlorate.

Chlorate is Cl with 3 oxygens. ate = saturated. Chlorine has seven valance electrons when it is saturated six of these electrons are used by oxygen ( 2 electrons per oxygen) leaving only 1 electron.

1 K x 39 grams/mole

+1 Cl x 35.4 grams/ mole

+3 O x 16 grams/ mole

= 122.4 grams / mole Potassium Chlorate

25

122.4

= moles.

2.05 moles of Potassium Chlorate.

There is a 1:1 mole ratio. 1 mole of Potassium Chlorate will produce 1 mole of Potassium Chloride.

2.05 moles of Potassium Chlorate will produce 2.05 moles of Potassium Chloride.

Find the gram molecular mass of Potassium Chloride.

1 K x 39 = 39

+1 Cl x 35.4 = 35.4

= 74.4 grams / mole.

2.05 moles x 74.4 grams/ mole = 15.2 grams

Explanation:

hope this helped :)