True or False?
A substance is found to be made up of more than
one atom, but the atoms are all the same. This
substance is most likely a compound.

Answer: fault-block mountain

Explanation:

I got it right on edgen 2020

Answer:

d fault-block mountain

Explanation:

Answer:

im not sure what answer you're looking for here, their called valence electrons if thats what you're looking for.

Explanation:

Answer: They are chemically stable gases

Explanation:

Group 18 is also called the noble gases - because they have full valence shells it means they are stable and won't chemically react.

Answer: Fluorine has the highest ionization enthalpy.

Explanation: This is because the ionization energy decreases from top to bottom and increases from left to right. Also, ionization enthalpy is the amount of energy required by an isolated gaseous atom to lose an electron in its ground state.

Since fluorine needs just one atom to attain noble gas configuration so it will not want to lose any electron and hence a high amount of energy will be required to remove an electron from it.

Answer:

Chain reaction

Explanation:

Answer:

(A) A-(S) ; B-(R) ; C-(Q) ; D-(P).

Explanation:

(A)-S_ The male part of a flower.

(B)-R _The stalk of an anther.

(C)-Q_ The female structure of a flower.

(D)-P _The portion of the pistil recieving the pollen.

Answer:

Explanation:

Electron configurations and the periodic table. Elements are placed in order on the periodic table based on their atomic number, how many protons they have. In a neutral atom, the number of electrons will equal the number of protons, so we can easily determine electron number from atomic number.

The Molarity of volumetric flask 1 : 1.26 M

The Molarity of volumetric flask 2 : 0.06 M

Dilution is a process of decreasing the concentration of a solution by adding a number of solvents

Can be formulated

M₁V₁=M₂V₂

M₁ = Initial Molarity

V₁ = Initial volume

M₂ = Final Molarity (after dilution)

V₂ = Final volume (after dilution)

Volume of volumetric flask = 500 ml

[tex]\tt M_1.V_1=M_2V_2\\\\9\times 0.07=M_2.0.5\rightarrow M_2=1.26[/tex]

[tex]\tt M_1.V_1=M_2V_2\\\\1.26\times 0.023=M_2\times 0.5\rightarrow M_2=0.06[/tex]

Cell Membrane. Has multiple proteins between it that allow certain things in and out. I think.

Answer:

adding 3 tbsp. of salt should be about enough to make the egg float.

Explanation:

The density of the average egg will be slightly greater than that of water, so it will sink. To make the egg float, we have to make the water more dense by adding salt. For 1 cup of water.

Answer:

B. Rabbits

For photosynthesis you need chlorophyll but rabbits don't have it.

Answer:

backward, opposite, retrograde

Explanation:

why, i just got it right when i put that.

Answer:

here they are

Explanation:

Venus's rotation is backward compared to Earth's.

Venus's rotation is the opposite compared to Earth's.

Venus's rotation is retrograde compared to Earth's.

Answer:

Cloud condensation nuclei or CCNs are small particles typically 0.2 µm, or 1/100 the size of a cloud droplet on which water vapor condenses. Water requires a non-gaseous surface to make the transition from a vapour to a liquid; this process is called condensation.

Answer:

It does not contain free mobile ions

Explanation:

Solid sodium chloride does not conduct electricity because it does not contain free mobile ions.

In solid state ions are arranged into crystal lattice and will not conduct a current of electricity.

Answer:You can view more details on each measurement unit: molecular weight of BaCl2 or grams This compound is also known as Barium Chloride. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles BaCl2, or 208.233 grams.

Explanation:

Answer:

Potassium (K)

Explanation:

Out of the four options, Potassium is the only one to fill a total of 4 energy levels.

Both Cesium (Cs) and Rubidium (Rb) fill more than three energy levels, with Cesium filling 6 and Rubidium filling 5.

Sodium (Na) only fills 3 energy levels.

Thus, that leaves Potassium (K), which has 4 energy levels.

Hope this helped ^-^

Answer:

Please mark me brainliest. the answer is

Explanation:

The problem is that the desalination of water requires a lot of energy. Salt dissolves very easily in water, forming strong chemical bonds, and those bonds are difficult to break. Energy and the technology to desalinate water are both expensive, and this means that desalinating water can be pretty costly.

Fractional distillation not used to produce drinking water from sea water Because single step distillation process is enough to purify sea water.

The separation of a liquid mixture into fractions differing in boiling point (and hence chemical composition) by means of distillation, typically using a fractionating column.

We don’t need fractional distillation but single step distillation to purify seawater.

Fractional distillation is most commonly used to separate various volatile organics out of crude oil as the fractions of the crude have different uses.

Removing water from a solution is a single step process we can easily do at home.

Hence,Fractional distillation not used to produce drinking water from sea water Because single step distillation process is enough to purify sea water.

Learn more about Distillation here ;

https://brainly.com/question/13345735

#SPJ2

pH=4.625

The classification of this sample of saliva : acid

The water equilibrium constant (Kw) is the product of concentration

the ions:

Kw = [H₃O⁺] [OH⁻]

Kw value at 25° C = 10⁻¹⁴

It is known [OH-] =  4.22 x 10⁻¹⁰ M

then the concentration of H₃O⁺:

[tex]\tt 10^{-14}=4.22\times 10^{-10}\times [H_3O^+]\\\\(H_3O^+]=\dfrac{10^{-14}}{4.22\times 10^{-10}}=2.37\times 10^{-5}[/tex]

pH=-log[H₃O⁺][tex]\tt pH=5-log~2.37=4.625[/tex]

Saliva⇒acid(pH<7)

Answer: Amount of ethyl butyrate formed = 11.3 g

Explanation: The reaction between butanoic acid (C3H7COOH) and excess ethanol (C2H5OH) is:

Since ethanol is the excess reagent, the formation of the product i.e. ethyl butyrate is influenced by the amount of butanoic acid present

Based on the reaction stoichiometry:

1 mole of butanoic acid produces 1 mole of ethyl butyrate

Mass of butanoic acid = 8.50 g

Molar mass of butanoic acid = 88 g/mol

Moles of ethyl butyrate = 0.097

Molar mass of ethyl butyrate= 116 g/mol

brainless, please

Grams of ethyl butyrate produced : 11.27 g

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

The reaction between Butanoic acid-C₄H₈O₂ and an excess Ethanol-C₂H₅OH to produce ethyl butyrate-C₆H₁₂O₂ :

C₄H₈O₂+C₂H₅OH⇒C₆H₁₂O₂+H₂O

mass Butanoic acid- C₄H₈O₂= 8.55 g, so mol C₄H₈O₂ (MW=88,11 g/mol) :

[tex]\tt \dfrac{8.55}{88.11}=0.097[/tex]

[tex]\tt \%yield=\dfrac{actual}{theoretical}\times 100\%[/tex]

For 100% yield ⇒ actual=theoretical

Because Ethanol as an excess, so Butanoic acid as a limiting reactant and mol Ethyl butyrate based on mol Butanoic acid

From equation, mol ratio of mol C₆H₁₂O₂ : mol C₄H₈O₂ = 1 : 1, so : mol C₆H₁₂O₂=mol C₄H₈O₂= 0.097

mass C₆H₁₂O₂(MW=116.16 g/mol)

[tex]\tt 0.097\times 116,16 g/mol=11.27~g[/tex]

Answer:

The answer is true.

Answer:

C

The particles in solid are closely packed which prevent it from changing its shape

The phrase that best describes the particles in a solid is closely packed.

SOLIDS:

Learn more at: https://brainly.com/question/17061172?referrer=searchResults

Answer:

CO2 + 2H2O

Explanation:

left side of the equation is the products side, right side is the reactant side

Answer:

Carbon Dioxide(CO2) and Water (H2O)

Explanation:

Whatever is on the right side of the equation is the products, the left side is the reactants.