can anyone give me just the answers??

Answer:

Higher numbers indicate bases- not acidic/less acidic

Explanation:

Answer:

higher the ph number means stronger base

Explanation:

Answer: Neutron has no charge, electron has a charge and mass. Neutron occurs inside the nucleus where electron is seen outside the nucleus.

Explanation:

The heat is evolved when 24.9 g of propanol (C3H7OH) is burned is 834.15 J

To solve this question,  First, we need to find the number of moles present in 24.9 g of propanol.

⇒ Formula

⇒ Where:

From the question,

⇒ Given:

⇒ Substitute these values into equation 1

⇒ Finally the heat evolved is

Hence, The heat evolved when propanol is burned is 834.15 J

Learn more about heat here: https://brainly.com/question/21222010

Answer:

c

Explanation:

edge 2021

Answer:

c

Explanation:

Answer:

B

Explanation:

the pH scale is based on the function

1x10-14

So since pH is neutral the concentration of OH and H must be equal hence the only option in which the concetration would [OH]{H}= 1x10-14 would be when both are equal so it cannot be a or d and when they are expressed in concetration so the only option is B.

The pH of the solution can be used to give the relation between the pOH and the hydroxide ion concentration. The concentration of hydroxide ions is 1 ×10⁻⁷. Thus, option B is correct.

pOH is the measure of the hydroxide ion in the solution. The hydroxide concentration from pH is related as:

pH = - log [H⁺]

[H⁺] = 10⁻⁷

= 1 × 10⁻⁷

The hydroxide concentration from hydrogen concentration is calculated as:

[H⁺][OH⁻] = 1 × 10⁻¹⁴

[OH⁻] = (1 × 10⁻¹⁴) ÷ (1 × 10⁻⁷)

= 1 ×10⁻⁷

Therefore, option B. 1 ×10⁻⁷ is the hydroxide ion concentration.

Learn more about hydroxide concentration here:

https://brainly.com/question/22938758

#SPJ2

Answer:

0.28M H2SO4

Explanation:

The molarity of a solution is defined as the ratio between the moles of the solute (In this case, H2SO4) and its volume in liters.

In the problem, the volume of the solution is increased from 125mL to 250mL. That means the solution is diluted:

250mL / 125mL = 2 times.

As the solution is diluted 2 times, the concentration is decreased in 2, that is:

0.56M / 2 =

Answer : A

Explanation : Surface-active compounds/agents (surfactants) Substances which have the effect of reducing the surface tension of a solvent, an example being a detergent/surfactant or soap dissolved in water. ... Both synthetic detergents and soaps are surfactants. Surfactants See "Surface-active compounds/agents".

According to the context, a detergent is an example of a synthetic  organic compound.

They are a group of synthetic organic compounds that have the property of lowering the surface tension of the liquids in which they are dissolved.

These contain surfactant substances that help in penetration, soaking, emulsification, dispersion, solubilization.

Therefore, we can conclude that according to the context, a detergent is an example of a synthetic organic compound.

Learn more about synthetic organic compound here: https://brainly.com/question/13049450

#SPJ2

Answer:

it's B

Explanation:

the small intestine is know to carrie out most of the digestive process absorbing almost all the nutrients and well the large intestine absorbs water. hope it helps :)

Answer:

[tex]2Zn+PbCl_4\rightarrow 2ZnCl_2+Pb[/tex]

Explanation:

Hello there!

In this case, when referring to single replacement reactions, it is crucial for us to figure out the formula of the starting reactants; thus, we know zinc is Zn and lead (IV) chloride is PbCl₄. In such a way, the reaction proceeds as follows:

[tex]Zn+PbCl_4\rightarrow ZnCl_2+Pb[/tex]

Which must be balanced as shown below:

[tex]2Zn+PbCl_4\rightarrow 2ZnCl_2+Pb[/tex]

Regards!

Answer:

90 Thymine bases

Explanation:

Chargaff's rules states that in the DNA of any organism, the amount of purine and pyrimidine bases must be in a 1:1 ratio. This means that the amount of Adenine and Guanine bases (purines) should be equal with their complementary pairs of Thymine and Cytosine bases respectively (pyrimidines). (A = T) + (G = C) = 100

Hence, according to this question, if there are 60 cytosine bases, this means that there will be 60 Guanine bases. 60 C + 60 G = 120 pyrimidines

300 total bases - 120 pyrimidine bases = 180 purine bases.

180/2 = 90 equal bases of Adenine and Thymine. Hence, Thymine bases will be 90.

Answer:

The answer is below

Explanation:

Certain countries like Germany under Adolf Hitler favored military solutions to the great depression because the government felt that having a mass production of military weapons and recruitment of unemployed people or citizens into the army would change the dire situation.

On the other hand, countries like the United States did not favor the military solutions but instead choose the NEW DEAL under Franklin D Roosevelt; the reason could be linked to their democratic culture, the isolation belief tendency.

Answer:

I hope this helps you! :)

Explanation:

Survival of the fittest" is a popular term that refers to the process of natural selection, a mechanism that drives evolutionary change. Natural selection works by giving individuals who are better adapted to a given set of environmental conditions an advantage over those that are not as well adapted.

Answer:

what image?????

Explanation:

?

Answer:

2nd image/ image B

Answer:

Selenium oxide

Explanation:

Answer:

4 NH3 + 5 O2 = 4 NO + 6 H2O

Explanation:

Balance to have equal atoms on both sides.

Answer:

Later when they are older

Explanation:

brainliest/

Answer:

The excited state electron configuration shows when an electron is excited and jumps into a higher orbital. For example, sodium in its excited state would have an electron configuration of 1s2 2s2 2p6 3p1, compared with its ground state of 1s2 2s2 2p6 3s1.

Explanation:

Answer:

C

Explanation:

Answer:

One atom of each element is made up of protons, neutrons, and electrons. The number of electrons determines how an element reacts. The number of protons gives the element its identity. ... They react well with nonmetals because they can easily give up electrons to form ions.

Answer:

C. Endothermic

Explanation:

Since the products potential energy is higher than the reactants potential energy, it has abosrbed energy, thus making the graph endothermic.

Answer:

1.35 moles

Explanation:

Assuming the gas is ideal, we can solve this problem by using the following equation:

Where:

We input the data:

And solve for n:

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

We have

[tex]n = \frac{4.81 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{4.81}{6.02} \\ = 0.799003...[/tex]

We have the final answer as

Hope this helps you

here's your answer dear friend❤❤

Answer:

7.59

Explanation:

Answer:

a

Explanation:

me say so

Answer:

C

Explanation:

Answer:

jkrifhcuhixjck

gvudd

Explanation:

dugucdsorfooggigj

a CUCO3(s) + ( I don't have the symbol on my phone ) delta CUo(s) + CO2(g)

b NH4NO3➡️ HNo3 + H2O

c. Ba(OH)2+CO2 ➡️ BaCO3+H20

d Na +H20 ➡️NaOH +h2

Explanation:

I think this should be it , I think that 8s the symbol for hydrogen gas if its not correct I'm sorry

Answer:

5 moles O2 1 mole C3H8

Explanation:

In the question, it is mentioned about the ratio Propane and Oxygen. So the the ration will be 1:5 i.e, 5 moles of O2 1 mole C3H8. There is only one option which mentions both Propane and Oxygen and others doesn't.

Answer:

D. Exothermic

Explanation:

The enthalpy, ΔH, of a reaction is defined as the change in heat when a reaction occurs.

A reaction with ΔH > 0 is called endothermic and requires energy to be produced

A reaction with ΔH < 0 is called exothermic and produce energy when occurs (An example is the combustion of octane that produce energy that is used in engines to produce movement)

As the enthalpy of the reaction is -1207kJ/mol (ΔH < 0) the reaction is:

Answer: 0.03798 kilograms

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given volume}}{\text {Molar Volume}}=\frac{12L}{22.4L}=0.535moles[/tex]

1 mole of chlorine gas [tex](Cl_2)[/tex] weighs = 71 g

Thus 0.535 moles of chlorine gas [tex](Cl_2)[/tex] will weigh = [tex]\frac{71}{1}\times 0.535=37.98g=0.03798kg[/tex]            (1kg=1000g)

Thus there are 0.03798 kilograms in 12 L of chlorine gas.

Answer: There are [tex]40.41 \times 10^{23}[/tex] molecules present in 6.71 moles of [tex]NH_{3}[/tex].

Explanation:

Given: Moles of [tex]NH_{3}[/tex] = 6.71 mol

According to the mole concept, 1 mole of every substance contains [tex]6.022 \times 10^{22}[/tex] molecules.

Therefore, molecules present in 6.71 moles are calculated as follows.

[tex]Molecules = moles \times 6.022 \times 10^{23}\\= 6.71 \times 6.022 \times 10^{23}\\= 40.41 \times 10^{23}[/tex]

Thus, we can conclude that there are [tex]40.41 \times 10^{23}[/tex] molecules present in 6.71 moles of [tex]NH_{3}[/tex].