HELP ASAP ILL MARK BRAINLIEST

Answer:

The answer is C

Explanation:

2.2.2: The pH Scale

pOH = -log[OH-]

Answer:

This is all true if the atom has to be neutral.

Also what does V mean?

Helium: one shell with 2 neutrons and 2 protons in the center, with 2 electrons in the first shell.

Lithium: two shells with 4 neutrons and 3 protons in the center, with 2 electrons in the first shell, and 1 electron in the second shell.

Nitrogen: two shells with 7 neutrons and 7 protons in the center, with 2 electrons in the first shell, and 5 electrons in the second shell.

Flourine: two shells with 9 protons and 10 neutrons in the center, with 2 electrons in the first shell, and 7 electrons in the second shell.

Neon: two shells with 10 neutrons and 10 protons in the center, with 2 electrons in the first shell, and 8 electrons in the second shell.

Boron: two shells with 6 neutrons and 5 protons in the center, with 2 electrons in the first shell, and 3 electrons in the second shell.

Answer/Explanation: Oxygen becomes liquid at -183°C.

Liquid nitrogen has a lower boiling point at −196 °C (77 K) than oxygen's −183 °C (90 K), and vessels containing liquid nitrogen can condense oxygen from air.

Answer:

48 kg

Explanation:

1 kilogram = 2.2 pounds

Answer:

C. Precipitation

Explanation:

Answer:

Precipitation

Explanation:

Answer:

false

Explanation:

As we know that in sodium-potassium pump .          

sodium potassium move 3Na+ outside the cells          

and  moving 2k+ inside the cells                        

so that we can say that given statement is false    

Answer FALSE                                                      

Answer:

The lower case letter represents the recessive allele.

Explanation:

I just learned abt this today so im confident that this is correct

Answer:

a.

can be made up of a combination of different elements.

Answer:

19.99

Explanation:

The steps are what I did, so no need to do it the exact same!

1. Add 4.50 and 3.4

4.50 + 3.4 = 7.9

2. Add 7.9 and 12.09

7.9 + 12.09 = 19.99

Hope this helps!

Answer:

The answer to this equation is 19.99. If you round the number, it is 20.

Explanation:

     4.50

     3.40 (0 as a place holder)

+   12.09

-------------------

     19.99 because . . .

4.5 + 3.4 = 7.9

7.9 + 12.09 = 19.99.

19.99 ≅ 20.00 or 20 (IF YOU NEED TO ROUND IT, IF NOT, IT IS JUST 19.99!!!)

Answer:

The options are

A. a hypothesis

B. a theory

C. a research question

D. a scientific explanation

The answer is A. a hypothesis

Explanation:

A hypothesis is referred to as a brief explanation on the occurrence of an event.

In the example above using of warm water on plants was inferred to make it grow faster as hot water increases the metabolism.

Answer:

Im pretty sure its B

Explanation:

Answer:

G) 50 mol

Explanation:

Given data:

Mass of methane = 800 g

Number of moles of CO₂ produced = ?

Solution:

Chemical equation:

CH₄ + 2O₂      →      CO₂ + 2H₂O

Number of moles of methane:

Number of moles = mass/molar mass

Number of moles = 800 g/ 16 g/mol

Number of moles = 50 mol

Now we will compare the moles of methane and carbon dioxide.

                 CH₄        :         CO₂

                    1           :          1

                  50          :        50

Answer:

The particles of an ideal gas have no volume and no attractions for each other.  In a real gas, however, the molecules do have a measurable volume. The molecules of real cases have intermolecular attractions for each other.

An ideal gas behaves like a real gas under the conditions of low temperature and high pressure.

This is because at low temperature and high pressure molecules of gas will have negligible kinetic energy and strong force of attraction.

Thus ethene gas does not behave like an ideal gas at low temperatures and high pressures.

The particles of an ideal gas have no volume and no attraction for each other.  In a real gas, however, the molecules have a measurable volume. The molecules of real gases have intermolecular attractions for each other. An ideal gas behaves like a real gas under conditions of low temperature and high pressure. This is because at low temperatures and high-pressure molecules of gas will have negligible kinetic energy and a strong force of attraction. Thus, ethene gas does not behave like an ideal gas at low temperatures and high pressures.

Answer:

0.18mol

Explanation:

Given parameters:

Mass of CaCl₂  = 20g

Unknown:

Number of moles = ?

Solution:

To solve this problem;

     Number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

Molar mass of CaCl₂ = 40 + 2(35.5) = 111g/mol

     Number of moles  = [tex]\frac{20}{111}[/tex] = 0.18mol

Answer:

consumption, investment, government consumption, and gross investment, and net exports.

Explanation:

Answer:

A

Explanation:

Answer:

345

Explanation:

Answer:

what is the importance of anthropology as a student?

Social anthropology plays a central role in an era when global understanding and recognition of diverse ways of seeing the world are of critical social, political and economic importance. Social anthropology uses practical methods to investigate philosophical problems about the nature of human life in society.

Explanation:

Answer:

Option A

Explanation:

The choice A accurately specifies and illustrates the orbital diagram of a Nitrogen atom with 7 electrons.

Based on the number of electrons in a Nitrogen atom, there are two energy levels, the s and p sub-levels:  

        Nitrogen  = 2, 5

The first energy level, S will take up two electrons with opposite spin.

The second energy level will have 5 electrons in an S and P orbital.

Configuration 1 is correct because, it satisfies the premise that half and fully filled orbitals are also stable.

Answer:

n = 0.36 mol

Explanation:

We need to find number of moles present in 16 grams of carbon dioxide.

Let there are n number pf moles,

n = given mass/molecular mass

The molecular mass of carbon dioxide = 44 g/mol

So,

[tex]n=\dfrac{16\ g}{44\ g/mol}\\\\n=0.36\ \text{mol}[/tex]

So, there are 0.36 moles in 16 grams of carbon dioxide.

Answer: Refraction

Explanation: i took the test

Answer:

0.11 M.

Explanation:

Hello!

In this case, since the molarity is computed as the moles of solute divided by the volume of solution in L, we first need to compute the moles of potassium in 99.7 mg as shown below:

[tex]n_K=99.7mgK*\frac{1gK}{1000mgK} *\frac{1molK}{39.1gK}=0.00255molK[/tex]

Moreover, given the density of the seawater (mixture containing the K and other solutes), we can compute the liters as shown below:

[tex]V=25.0g*\frac{1mL}{1.071g}*\frac{1L}{1000mL}=0.0233L[/tex]

Therefore, the molarity turns out:

[tex]M=\frac{0.00255mol}{0.0233L}\\\\M=0.11M[/tex]

Best regards!

Explanation:

Heat is a measure of change, never a property possessed by an object or system.

Therefore, it is classified as a process variable.

Temperature describes the average kinetic energy of molecules within a material or system and is measured in Celsius (°C), Kelvin(K), Fahrenheit (°F), or Rankine (R).

Heat and temperature are two different quantities but they do rely on each other.

Answer:

15

Explanation:

since atomic number=proton number so phosphorus has as proton number 15

Answer:

6.2

Explanation:

Answer:

as no. of protons is equals to the no. of electrons so, it is a neutral atom.

but, as Atomic No. = Mass No. - No. of neutrons

Atomic No. = No. of protons = 18

so, Mass No. = Atomic No. + No. of Neutrons= 18 + 20 = 38

so, correct option is C.

Explanation:

A scientist observes several different fossils in a

rock layer. Based on this observation, which is

the best conclusion?

A. The fossils are composed of lava that cooled

A. The fossils are composed of lava that cooledaround several organisms.

B. The fossils formed about the same time as the rock layer in which they were found.

That's the right answer but you can choose one.

Answer:

2KOH(aq) + NiSO₂(aq) → K₂SO₄(aq) + NiOH₂(s)

Explanation:

This reaction is an example of a double-replacement reaction where the cations of two compounds exchange with its anions. In the reaction:

KOH(aq) + NiSO₄(aq)

There are produced K₂SO₄ and NiOH₂ salts (The last one is insoluble, its state is (s) but K₂SO₄ is very soluble, its state is (aq). The unbalanced reaction is:

KOH(aq) + NiSO₄(aq) → K₂SO₄(aq) + NiOH₂(s)

To balance the potassiums:

And now, the reaction is balanced

Answer:

meiosis

Explanation:

Sex cells or gametes undergo a division process different from the rest of the cells, that is, they do not comply with mitosis but with meiosis, and this is because two cells (female and male gametes) have to fuse with their hemi load genetics to complete a new genetic code together.

Answer:

4) mitosis

5) chromatids

6) sex cells

7)meiosis

8) genetic variability

Explanation:

:P maTh

Answer:

uhhh i don't know the experiment

put link and i might be able to help you

Explanation: