Which electrons are the valence electrons of the atom?
O A. The electrons closest to the nucleus
O B. The electrons that have lost their charge
O C. The electrons farthest away from the nucleus
O D. The electrons that have entered the nucleus

Answers

Answer 1

Answer:

[tex]\boxed{C}[/tex]

Explanation:

The electrons farthest away from the nucleus are the valence electrons of an atom.

The valence electrons are the electrons orbiting in the last shell around the nucleus.

Answer 2

Answer:

Option C

Explanation:

The electrons that are the farthest away from the nucleus are valence electrons. These are electrons are present in the outermost shell which is also called valence shell.


Related Questions

What is the [tex]K_{c}[/tex] Expression for the following reaction [tex]C_{6}H_{12}O_{6} + O_{2} \ \ - \ \ \textgreater \ 6H_{2}O+6CO_{2}[/tex] NO ABSURD ANSWERS!

Answers

Answer:

[tex]\boxed{\mathrm{view \: explanation}}[/tex]

Explanation:

This is an irreversible reaction, we cannot derive any [tex]\mathrm{K_c}[/tex] expression for it. The [tex]\mathrm{K_c}[/tex] expression can only be derived for reversible reactions and not irreversible reactions. We cannot derive the [tex]\mathrm{K_c}[/tex] expression for this reaction.

Un compuesto ZO2 tiene masa molar igual a 64. La masa atómica de Z debe ser: A . 6. C. 12. E. 32. B. 10. D. 24.

Answers

Answer:

32. Opcion E

Explanation:

ZO₂ podemos entenderlo como dióxido de Z

1 mol de ZO₂ contiene 1 mol de Z y 2 moles de O₂ por lo que si la masa molar es de 64 g/mol, podemos plantear lo siguiente

Masa de Z + 2 masa de O = 64 g/mol

Sabemos que la masa del oxígeno es 16 g/mol

x + 2. 16 g/mol = 64 g/mol

x = 64 - 32 →  32 g/mol

La masa atómica coincide con la masa molar, por lo tanto la masa atomica de Z es 32.

Considerando la definición de masa molar, la respuesta correcta es la opción E: La masa atómica de Z debe ser 32.

La masa molar es la masa de un mol de una sustancia, la cual puede ser un elemento o un compuesto, esto es, es la relación entre la cantidad de sustancia y su masa.

En otras palabras, la masa molar es la cantidad de masa que una sustancia contiene en un mol.

En la tabla periódica, se puede encontrar la masa molar de los elementos, también llamada masa atómica o peso atómico.  

Para calcular la masa molar de un compuesto, también llamado masa o peso molecular, se debe sumar la masa molar de los elementos del compuesto multiplicado por su cantidad en el compuesto.

Entonces, en este caso, siendo la masa molar del oxígeno (O) 16, y la masa molar del compuesto ZO₂ 64, y denominando x a la masa molar de Z, entonces la masa molar del compuesto puede expresarse como:

x + 2×16= 64

Resolviendo:

x + 32= 64

x=64 -32

x=32

Finalmente, la respuesta correcta es la opción E: La masa atómica de Z debe ser 32.

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Two oxides of lead were separately reduced to metallic lead by heating in a current of

i) Mass of yellow oxide taken=3.45g

ii) Mass of brown oxide taken=1.227g
Loss in mass during reduction=16g

Show that the above data illustrate the law of multiple proportions.​

Answers

Answer:

HeyA ❤

Let us consider the mass of oxygen as 1 g.

Mass of lead obtained from yellow oxide = 3.45 g – 0.24 g = 3.21 g

Mass of oxygen = 0.24 g

The mass of lead that combines with 0.24 g of oxygen = 3.21 g

Therefore, mass of lead that combines with 1 g of oxygen = 3.21/ 0.24 = 13.4 g

Mass of lead obtained from brown oxide = 1.227 g – 0.16 g = 1.067

Mass of oxygen = 0.16g

The mass of lead that combines with 0.16 g of oxygen = 1.067 g

Therefore, mass of lead that combines with 1 g of oxygen = 1.067/ 0.16 = 6.66 g

Now, ratio of masses of lead which combines with a fixed mass of oxygen = 13.4 : 6.66

= 2 :1

Thus, masses of lead which combine with the fixed mass of oxygen are in the ratio of (2:1) i.e. small whole numbers.

Hence, the law of multiple proportions is illustrated.

Follow meehhhh Piper ❤

How many moles are in 10.23 g of PO4-3? How many moles are 8.25 x 10^28 molecules of Na2CO3? What is the mass of 6 moles of CH2O? How many formula units are in 6.34 g of NaCl? How many ions are in 0.25 moles of Cu+2? How many grams are in 3.4 x 10^24 molecules of CH4? How many moles are in 10 mL of water (density of water = 1 g/mL)? (sorry for so many questions in one)

Answers

Answer:

1) 0.1077 moles

2) 137043.2 moles

3) 180.186 grams

4) 6.53×10²² molecules or formula units

5) 1.505×10²³ ions

6) 90.626 grams

7) 0.555 moles

Explanation:

1) The number of moles, n = Mass of the substance/(Molar mass of the substance)

The molar weight of PO₄⁻³ is 94.971 g/mol

The number of moles in 10.23 g of PO₄⁻³ is n =10.23/94.971 = 0.1077 moles

The number of moles in 10.23 g of PO₄⁻³ = 0.1077 moles

2) The number of molecules of Na₂CO₃ in one mole of Na₂CO₃ is given by the Avogadro's number, [tex]N_A[/tex] = 6.02 × 10²³ molecules

Therefore, the number of moles in 8.25 × 10²⁸ molecules of Na₂CO₃ is found by determining how many Avogadro's number of molecules are in 8.25 × 10²⁸ molecules of Na₂CO₃ as follows;

The number of moles in 8.25 × 10²⁸ molecules of Na₂CO₃ = (8.25 × 10²⁸)/(6.02 × 10²³) = 137043.2 moles

The number of moles in 8.25 × 10²⁸ molecules of Na₂CO₃ = 137043.2 moles

3) The molar mass of CH₂O = 30.031 g/mol

Therefore, the mass of 6 of CH₂O = 6 moles × 30.031 g/mol = 180.186 grams

The mass of 6 of CH₂O = 180.186 grams

4) The molar mass of NaCl = 58.44 g/mol

The number of moles of NaCl in 6.34 g of NaCl 6.34/58.44 = 0.1085 moles

1 formula unit of NaCl = 1 molecule of NaCl

The number of molecules in one mole of  a substance =  [tex]N_A[/tex] = 6.02 × 10²³

Therefore, the number of molecules in  0.1085 moles of NaCl = 6.02 × 10^(23) × 0.1085 = 6.53×10²² molecules or formula units

5) The number of ions per mole of any substance is give by Avogadro's number, [tex]N_A[/tex] = 6.02 × 10²³ ions,

The number of ions in 0.25 moles of Cu⁺² = 0.25×6.02 × 10²³ ions = 1.505×10²³ ions

The number of ions in 0.25 moles of Cu⁺² =  1.505×10²³ ions

6) The molar mass of CH₄ = 16.04 g/mol

The number of moles, n, in 3.4×10²⁴ = 3.4×10^(24)/(6.02×10^(23)) = 5.65 moles 5.65*16.04

The mass of 5.65 moles of CH₄ = 5.65 moles × 16.04 g/mol = 90.626 grams

The mass of 3.4×10²⁴ molecules of CH₄ = 90.626 grams

7) The density of water = 1 g/mL

The volume of the water 10 mL

The mass of the water = Volume × Density = 10 mL × 1 g/mL= 10 grams

The molar mass of water = 18.015 g/mol

The number of moles of water in 10 g  of water = mass/(Molar mass) = 10/18.015 = 0.555 moles.

why NH4 is not a molecular ion

Answers

Answer:

Is

Explanation:

Ammonium (NH4+) is a poly-atomic ion. ... NH4+ is not the formula of a neutral molecule, neutral ammonia is NH3. to make the ammonium ion, you add a proton (H+). Thus, Ammonium is NOT a molecular ion. You can create a molecular ion like NH3- by electron bombardment to give it a negative charge.

Hope this helps......

A 2.5-liter sample of a gas has 0.30 mole of the gas. If 0.15 mole of the gas is added, what is the final volume of the gas? Temperature and pressure remain constant. 3.4 liters 3.8 liters 4.2 liters 4.7 liters

Answers

Answer:

3.75 ltrs

Explanation:

The final volume of the gas is 3.8L.

What is volume?

Volume is the quantity of space occupied by a liquid, solid, or gas.

Using Avogadro's law.

Avogadro's Law:

According to Avogadro's law an equal volumes of all gases, at the same temperature and pressure, have the same number of molecules. For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.

V₁/n₁=V₂/n₂

Where V₁ = initial volume

            V₂ = final volume

             n₁ = initial amount of gas in moles

             n₂ = final amount of gas in moles

Avogadro's Law explains when the temperature and pressure are kept constant, volume is directly proportional to gas amount in moles, which means when the volume increases, the amount of gas also increases.

V ∝ n

V₁/n₁ = V₂/n₂

V₁ = 2.5L, V₂ = ?, n₁ = 0.30 mol, n₂ = 0.45 mol

substituting the above values in the equation,

2.5L/0.30 mol = V₂/0.45 mol

                      V₂ = 1.125/0.30 mol

                       V₂ = 3.8L

Hence, 3.8L is the final volume of the gas.

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What happens to water 100°C as pressure is increased from 0.7 atm to 1.4 atm

Answers

Answer:

Explanation:

The graph shows the phase diagram of water . From it , it is clear that at 100°C water remains in equilibrium with water vapour and at this temperature , the vapour pressure is equal to one  atm . So this must be boiling point of water.

At 0.7 atm pressure , boiling point must have been reduced . So when water is at 100°C , it must have been completely in vapour phase .

Now the pressure is increased to 1.4 atm . In this process of increase of pressure , the water in vapour state must have turned into liquid state as soon as the pressure increases beyond  1 atm . Beyond it its boiling point would have increased above  100°C so it can not remain in gaseous phase . At 1.4 atm , its boiling point would have increased to 110°C or so . Hence it must be in liquid phase because its temperature is below its boiling point at that pressure .

Hence water changes from gaseous phase to liquid phase when pressure changes from 0.7atm to 1.4 atm .

Research on ‘where a person’s carbon emissions come from inside a home’ and represent the data in the form of a pie chart. Pls answer with pie chart I WILL MARK U AS BRAINSLIEST IF YOU GIVE RIGHT ANSWER

Answers

Answer:

Here's what I get from one source.

Explanation:

[tex]\begin{array}{lc}\textbf{Source} &\textbf{Contribution \%} \\\text{Space heating }& 45\\\text{Water heating} &18\\\text{Space cooling} & 9 \\\text{Computers/Electronics} & 6 \\\text{Lighting} & 6 \\\text{Cooking} & 4 \\\text{Refrigeration} & 4 \\\text{Wet cleaning} & 3 \\\text{Other} & 5 \\\end{array}[/tex]

The pie chart is in the Figure below.

What is organic chemistry

Answers

Explanation:

Hi there!!!

The organic chemistry is a branch of chemistry which deals with the study of hydrocarbons compounds. organic chemistry deals with the study of structure, properties and reactivity of carbon compounds. It is a very broad area where more than 100000 organic compounds are studied.

Hope it helps..

1.10 The table gives the pH values of a few substances.
Substance
pH
2
Hydrochloric acid
Apple juice
4
Water
7
Ammonia
11,5
Which substance in the table is an example of a base?
A Hydrochloric acid
B Apple juice
C Water
D Ammonia

Answers

Answer:

D

Explanation:

Acidity is from 1-6

Neutral 7

Base 8-14

Answer:

D

Explanation :

Acidity is from 1-6

Neutral 7

Base 8-14

Each of the continents moves at a different rate and in a different direction. Based on this observation, do you believe that any of the modern continents will recombine to form a new supercontinent in the future? Why or why not?

Answers

Answer:

Supercontinent is a single landmass formed by the combination of many Earth's continental blocks or cratons.

Supercontinents form and split up every 400 or 500 million years and the last supercontinent was formed 300 million years ago, so it is possible that any of the modern continents will combine together to form a new supercontinent in future.

Answer:

Yes, modern continents could recombine to form a new supercontinent. Because the continents move at different rates and in different directions, it’s likely that in the future, continents will collide and join together.

Explanation: Edmentum's EXACT ANSWER SO DO NOT COPY!  Rewrite it in your own words.

MARKING BRAINLIEST!! - Chlorine reacts with methane to form gaseous hydrogen chloride and chloromethane according to the following equation: Cl2 (g) + CH4 (g) → HCl (g) + CH3Cl (g) If 100 mL of chlorine reacted with excess methane at constant pressure and temperature, what volume of chloromethane would be formed? Question 7 options: 50, cannot tell from the information provided, 200, 100

Answers

Answer:

100mL of chloromethane

Explanation:

Based on the equation:

Cl₂(g) + CH₄(g) → HCl(g) + CH₃Cl(g)

1 mole of chlorine reacts per mole of methane to produce 1 mole of HCl and 1 mole of chloromethane

Avogadro's law says that equal volumes of all gases, at the same temperature and pressure, have the same number of molecules. Using Avogadro's law we can say of the equation that:

1 mL of chlorine reacts per mL of methane to produce 1 mL of HCl and 1 mL of chloromethane

Because the system stays under constant pressure and temperature.

As 100mL of Cl₂ reacts with excess of CH₄ and 1mL of Cl₂ produce 1mL of CH₃Cl there are produced:

100mL of chloromethane

how many moles are in 8.5 x 10^25 molecules of CO2

Answers

Answer:

the answer is 5.1 1049 mol.

HELP ME OUT PLZ Today is the deadline

Answers

Answer:

Option (1)

Explanation:

When two or more substances are chemically combined in a fixed proportion of mass, substance formed is a compound.

Properties of a compound are different from the properties of the elements from which the compound is formed.

If Magnesium (Mg) is burned in the presence of Oxygen (O₂), Magnesium oxide (MgO) is formed.

Properties of MgO are different from Mg and O₂ because MgO is a COMPOUND.

Option (1) will be the answer.

Aspirin (C9H8O4) is an acid which can be titrated with a base to determine purity. If an aspirin tablet weighing 0.615 g is titrated with standardized 0.1121 M KOH, the endpoint is reached after 20.52 mL of KOH have been added. What is the percentage of aspirin in the tablet

Answers

Answer:

67.4 % of C₉H₈O₄

Explanation:

To make titrations problems we know, that in the endpoint:

mmoles of acid = mmoles of base

mmoles = M . volume so:

mmoles of acid = 20.52 mL . 0.1121 M

mmoles of acid = mg of acid / PM (mg /mmoles)

Let's determine the PM of aspirin:

12.017 g/m . 9 + 1.00078 g/m . 8 + 15.9994 g/m . 4 = 180.1568 mg/mmol

mass (mg) = (20.52 mL . 0.1121 M) . 180.1568 mg/mmol

mass (mg) = 414.4 mg

We convert the mass to g → 414.4 mg . 1g / 1000mg = 0.4144 g

We determine the % → (0.4144 g / 0.615 g) . 100 = 67.4 %

When lithium metal reacts with fluorine gas it forms the ionic compound lithium fluoride (LiF). What is the correct electron configurations of the ions formed

Answers

Answer:

The electronic configuration of ions formed are:

Li+ (2) => 1s2

Cl- (18) => 1s2 2s2 2p6 3s2 3p6

Explanation:

Lithium metal, Li will lose 1 electron to lithium ion Li+. Chlorine atom, Cl will receive the 1 electron to form the chloride ion Cl- as shown by the following equation below:

Li —> Li+ + e

Cl+ e —> Cl-

Combine both equation

Li + Cl + e —> Li+ + Cl- + e

Cancel out 'e'

Li + Cl —> Li+ Cl-

Thus, we can write the electronic configuration for the reaction as follow:

Before reaction:

Li (3) => 1s2 2s1

Cl (17) => 1s2 2s2 2p6 3s2 3p5

After reaction

Li+ (2) => 1s2

Cl- (18) => 1s2 2s2 2p6 3s2 3p6

Therefore, the electronic configuration of the ions formed are:

Li+ (2) => 1s2

Cl- (18) => 1s2 2s2 2p6 3s2 3p6

Eczema is a type of skin disease that appears as rashes or swelling. Eczema causes skin irritation or itchiness. What type of tissue does eczema affect? A. nervous B. muscle C. epithelial D. connective

Answers

Answer:

epithelial

Explanation:

nervous tissue are located only on specific areas mainly in the dermis like the parcinian to detect pressure so rashes won't be seen.muscle is located deep under the sub cutaneous layer so the symptoms can't appear.connective is also located deep in the skin eg in the eyes but epithelial tissue covers the deeper latest of the skin therefore this condition's signs can be well acknowledged I guess

Flask is immersed in a large beaker of very hot water. At first, the level of the liquid in the tube falls, but after a short time it rises. Explain why the liquid level in the tube stops falling and starts to rise.

Answers

Answer:

Explanation:

When a flask is dipped in very hot water in a large beaker , the flask expands due to heat gain . As a result , level of water in tube fitted in flask goes down .

After some time , the water inside tube also become hot so it expands  . coefficient of volume expansion of water is more than coefficient of volume expansion of glass . Hence greater expansion takes place in the volume of water . It is due to this fact that water level in tube starts rising after some time of fall .

Hi May I know how to balance this

Answers

Answer:

  2Ba₃(PO₄)₂ +6SiO₂ ⇒ P₄O₁₀ +6BaSiO₃

Explanation:

Equating coefficients, you get ...

  aBa₃(PO₄)₂ +bSiO₂ ⇒ cP₄O₁₀ +dBaSiO₃

For Ba: 3a = d

For P: 2a = 4c

For O: 8a +2b = 10c +3d

For Si: b = d

__

Expressing everything in terms of b and c, we get ...

  d = b

  a = b/3 = 2c

From the second, b = 6c, so we have ...

  a = 2c

  b = 6c

  c = c

  d = 6c

And we can write the equation with c=1 as ...

  2Ba₃(PO₄)₂ +6SiO₂ ⇒ P₄O₁₀ +6BaSiO₃

The chemical weathering of feldspar produces _____.

Answers

I’m pretty sure it’s clay minerals

Answer:

The chemical weathering of feldspar produces clay minerals

Explanation:

clay minerals form in the presence of water.

Give the word equation for the reaction between hydrogen and oxygen

Answers

Answer:

Hydrogen gas (H₂) + Oxygen gas (O₂) → Water (H₂O)

Explanation:

Hydrogen reacts with oxygen to form water. The reactants are hydrogen and oxygen and the product is water.

Answer:

Word Equation:

Hydrogen + Oxygen = Water

Hydrogen gas reacts with Oxygen gas to give Water.

The chemical Reaction is as follows:

    [tex]2H_{2} + O_{2}[/tex]   =>    [tex]2H_{2}O[/tex]

For which of the following reactions will a decrease in pressure shift the equilibrium to the left?
A). 2A2 (g) + B2 (g) --> 2A2B (g)

B). 2AB (g) --> A2 (g)+ B2 (g)

C). 2A2F3 (g) --> 4A (g) + 3F2 (g)

D). 2B (s) + 2HA (aq) --> 2BA (aq) + H2 (g)

Answers

Answer: I just took the test, the answer is A.

Explanation:



Landfills are one source of CO2. As garbage decomposes, it releases CO2 into the air. Can you think of at least
one way that humans can reduce the amount of trash they dump in landfills?

Answers

Answer:

Recycling and reuse of materials

Explanation:

One of the greatest problems facing the human population is the problem of solid waste disposal. The menace of solid waste disposal has led to the idea of landfills. Land fills are depressions on the earth surface prepared for the purpose of solid waste disposal.

The most important approach towards solid waste disposal is the idea of recycling of materials. A material can be collected after use and processed into the same material or serve as a precursor in another manufacturing process. This means that no waste is generated as the materials which are supposed to be disposed of as solid waste are processed into other useful materials. This will reduce the volume of solid wastes generated that may need to be disposed in a landfill.

Answer:

There are many ways to reduce the amount of trash sent to landfills: Recycle as much as possible. Limit disposable products, and use reusable ones whenever possible. Reuse, sell, or pass along old items instead of throwing them away.

Explanation: PLATO

Given the wavelength of the corresponding emission line, calculate the equivalent radiated energy from n = 4 to n = 2 in both joules and electron volts. Also, calculate the frequency of the wave. λ (Á) = 4861, ƒ(Hz), E(J), E(eV)

Answers

Explanation:

It is given that,

Initial orbit of electrons, [tex]n_i=4[/tex]

Final orbit of electrons, [tex]n_f=2[/tex]

We need to find energy, wavelength and frequency of the wave.

When atom make transition from one orbit to another, the energy of wave is given by :

[tex]E=-13.6(\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2})[/tex]

Putting all the values we get :

[tex]E=-13.6(\dfrac{1}{(4)^2}-\dfrac{1}{(2)^2})\\\\E=2.55\ eV[/tex]

We know that : [tex]1\ eV=1.6\times 10^{-19}\ J[/tex]

So,

[tex]E=2.55\times 1.6\times 10^{-19}\\\\E=4.08\times 10^{-19}\ J[/tex]

Energy of wave in terms of frequency is given by :

[tex]E=hf[/tex]

[tex]f=\dfrac{E}{h}\\\\f=\dfrac{4.08\times 10^{-19}}{6.63\times 10^{-34}}\\\\f=6.14\times 10^{14}\ Hz[/tex]

Also, [tex]c=f\lambda[/tex]

[tex]\lambda[/tex] is wavelength

So,

[tex]\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{6.14\times 10^{14}}\\\\\lambda=4.88\times 10^{-7}\ m\\\\\lambda=488\ nm[/tex]

Hence, this is the required solution.

f(Hz) = 6.17 × 10¹⁴

E(J) = 4.09 × 10⁻¹⁹

E(ev) = 2.56

MARKING BRAINLIEST!! - Ethane burns in oxygen gas to form gaseous carbon dioxide and water vapour according to the following equation: C2H6(g) + 3.5 O2(g) → 2 CO2(g) + 3 H2O(g) What volume of ethane, at constant pressure and temperature, would have reacted to produce 100 mL carbon dioxide?

Answers

Answer:

50 mL of ethane, C2H6.

Explanation:

The balanced equation for the reaction is given below:

C2H6(g) + 3.5O2(g) → 2CO2(g) + 3H2O(g)

Since the reaction occurred at constant temperature and pressure, we can as well say that:

From the balanced equation above,

1 mL of C2H6 reacted with 3.5 mL of O2 to produce 2 mL of CO2 and 3 mL of H2O.

Finally, we shall determine the volume of C2H6 required to produce 100 mL of CO2.

This is illustrated below:

From the balanced equation above,

1 mL of C2H6 reacted to produce 2 mL of CO2.

Therefore XmL of C2H6 will react to produce 100 mL of CO2 i.e

XmL of C2H6 = (1 x 100)/2

XmL of C2H6 = 50 mL.

Therefore, 50 mL of ethane, C2H6 is required to produce 100 mL of carbon dioxide, CO2.

How are the oxygen atoms balanced for redox equations in acidic solutions?
A. H20 and OH- are used to balance the oxygen atoms.
B. H+ ions from the acid form H20 with the oxygen.
C. Ht and OH are used to balance the oxygen atoms.
D. H20 and H* are used to balance the oxygen atoms.

Answers

Answer:

The answer is option D.

Explanation:

In balancing in acidic solutions, the oxygen is accounted for by adding a water molecule or H2O on the side that needs oxygen and 2H+ molecules for every H20 molecules placed on the other side of the equation.

The H+ and H2O molecules are in the ratio 2 : 1

Hope this helps you

When balancing redox reaction equations, H20 and H^+ are used to balance the oxygen atoms.

Redox reaction equations show reactions in which electrons were lost or gained in the process. If the redox reaction involves oxygen, it is common to balance the oxygen atoms using H20 and H^+.

For instance, the equation of the reduction of MnO4^- to Mn^+ is shown below; MnO4^-(aq) + 8H^+(aq) + 5e ----> Mn^2+(aq) + 4H2O(l). We can see that hydrogen ions and water were used to balance the four oxygen atoms.

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A microwave oven produces energy waves which are: A. longer than visible light B. shorter than visible light C. not part of the electromagnetic spectrum

Answers

Answer:

The answer is option A.

longer than visible light

Hope this helps you

Answer:

electromagnatic waves

Explanation:

what is heat energy​

Answers

Answer:

Movement of tiny particles called atoms, molecules and ions in a solids,liquid and gases. Heat energy can be transferred from one object to another. The transfer or flow due to the difference in temperature between the two objects is called heat.

Why is it incorrect to refer to a molecule of sodium chloride? a. Because sodium and chloride are not bonded together in any way. b. Because ionic compounds do not exist in discrete molecules--they exist in crystal lattices. c. Because molecules are not a meaningful term in chemistry. d. Because sodium chloride is not a compound found in nature.

Answers

Answer:

B. Because ionic compounds do not exist in discrete molecules -- they exist in crystal lattices.

Explanation:

A property of ionic compounds is that they form crystal lattice structures. Ionic compounds are crystals of many cations and anions bonded together. There is no molecule of ionic compounds because there is no single unit of the compound.

Hope this helps.

how to describe Pure science?

Answers

Answer:

Explanation:

Pure Science is a science that derives theories and predictions. Pure Science can also known as natural Science, basic science or fundamental science. Pure sciences deals with the study of natural phenomena through observation, experimentation and use of scientific methods.

Pure science is often conducted in a laboratory.The main objective of pure science is to increase information of a particular field of study and develop scientific theories.

Answer:

This is the development of the scientific theories and predictions such as in CHEMISTRY, PHYSICS and BIOLOGY.

Explanation:

It deals withe the study of Natural phenomena through observation, experiments and scientific methods.

Other Questions
> I am in need of translation help with this of my answers from English to Spanish in the parenthesis using the reflexive verbs/reflexive pronouns. I have provided from the book of Ch 5 examples of how to do appropriate reflexive pronouns attached to this. Describe your daily routine. Use the reflexive verbs of Ch 5 with the appropriate reflexive pronouns. Include the following points: In the Morning 1. What time do you usually wake up and get out of bed? (On my days off, I wake up and get out of bed at 9:30am. On my days of work, I wake up and get out of bed at 5:45am.) 2. Imagine that you wake up with the flu, using the present dense, using the verbs sentirse and doler state that you do nor feel well and then, describe the part part of the body that might be hurting you. (The first part of my body that would be hurting me with the flu is my throat.) 3. Despite the flu you decide to get up and get ready for the day. Give the sequence of events after you wake up for example, have breakfast, wash/ shower, brush teeth, put on make-up, shave, put on clothing, etc. (I get up from bed, use the bathroom, brush my teeth, then I go back to bed to rest.) In the Evening 4. You are back home. Describe your evening routine: eat, remove clothes, wash up/ shower, brush teeth, etc. (I will remove my work clothes and if I have not eaten, I will eat my dinner, brush my teeth and go to bed.) 5. What time do you fall asleep and go to bed? (I fall asleep around midnight and I go to bed around 10:00pm.) The New Deal will be remembered in American history: Group of answer choices as a set of public policy initiatives that did not result in sustained prosperity. as more powerful in scope than future European welfare states. for recasting the idea of American freedom to include a public guarantee of economic security for ordinary people. Two small plastic spheres are given positive electrical charges. When they are 20.0 cm apart, the repulsive force between them has magnitude 0.200 N.1. What is the charge on each sphere if the two charges are equal? (C)2. What is the charge on each sphere if one sphere has four times the charge of the other? (C) GEOLOGY Please help, need to turn it. Summarize the relationship between the composition, temperature, and volatile content of magmas and effusive vs. explosive eruptions. Because you can adapt to your audience while you are speaking, don't worry about analyzing the audience for an oral presentation.A. TrueB. False What is the overall tone created by the speaker? Part of the proceeds from a garage sale was $440 worth of $10 and $20 bills. If there were 2 more $10 bills than $20 bills, find the number of each denomination. find the length of y. assume the triangles are similara. 3.9b. 3.6c. 3.4d. 3.2 Two technicians are discussing cylinder- testing. Technician A says that when testing the power level of a specific cylinder using a Power balance test, it's best to ground it's secondart current. Technician B says that it's best to disconnect one spark plugs wire at a time to test cylinder power levels. Who is correct? Complete the equation that describes c, the number of cats and g, the number of gold bars put into the machine.c=?g Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars, midsize cars, and full-size cars. It collects a sample of three for each of the treatments (cars types). Using the hypothetical data provided below, test whether the mean pressure applied to the drivers head during a crash test is significantly different for each type of car. Use = 5% to hand calculate and check your work in SPSS.Compact Cars Midsize Cars Full-Size Cars6 4 96 4 87 5 5 PLS PLSPLS HELPPP------ The radioactive isotope used for carbon dating is1. Carbon 122. Carbon 13 3. Carbon 154. Carbon 14 What number :Increased by 130% is 69 i rlly need help!!! yle Co. has $1.1 million of debt, $3 million of preferred stock, and $1.2 million of common equity. What would be its weight on common equity Which of the following relations is not a function? x y 0 1 1 4 -1 4 x y 0 2 1 3 1 -3 x y 0 -2 1 -3 -2 5 x y 0 -2 1 -2 2 -2 phillp asked 100 students they favourite crisps out of ready salted, cheese and onion, and salt and vinegar. 35 students are boys 12 of these boys liked cheese and onion the best 9 girls liked ready salted the best 25 out of 41 students woh liked salt and vinger the best were girls work out the total number of students who liked ready salted the best. Identify the level of measurement of the data, and explain what is wrong with the given calculation. In a survey, the hair colors hair colors of respondents are identified as 100100 for brown hair commabrown hair, 200200 for blond hair commablond hair, 300300 for black hair commablack hair, and 400400 for anything else. The average (mean) is calculated for 503503 respondents and the result is 256.1 .256.1. The data are at the ordinal interval nominal ratio level of measurement. Suppose that for each firm in the competitive market for potatoes, long-run average cost is minimized at $0.6 per pound when 150 pounds are grown. The demand for potatoes is Q = 40,000/p. If the long-run supply curve is horizontal, then what would be the total consumer spending? Find the limit (if it exists). (If an answer does not exist, enter DNE.) $ \displaystyle{\lim_{\Delta x \rightarrow 0}} \text{ } \dfrac{{\color{red}2} (x + \Delta x) - {\color{red}2} x}{\Delta x} $