A restaurant is trying to decide whether it should serve its customers coffee
in ceramic mugs or Styrofoam cups. Which of the following is a testable
hypothesis to test one employee's prediction that "If we serve coffee in
Styrofoam cups, then it will stay warm longer than if we serve it in ceramic
mugs"?
OA. Coffee cools more quickly in a ceramic mug than in a Styrofoam
cup.
OB. Ceramic mugs are better for the environment than Styrofoam
cups.
OC. Ceramic mugs are more cost effective than Styrofoam cups
because they can be reused.
OD. Styrofoam cups tip over more easily than ceramic mugs.

Answer:Molecular Formula SO2

Hybridization Type sp2

Bond Angle 119o

Geometry V-Shaped or Bent

Explanation:

hope this helped <3

Answer:

H1 + H2 = -393.5 KJ + 483.6 KJ = 90.1 KJ

Explanation:

Equation 1 must be changed to C(s) + O2 (g) --> CO2 (g) H1 = -393.5 KJ

Equation 2 is in the correct order.

2H2O --> 2H2(g) + O2(g) H2 = 483.6 KJ

Adding the two equations together cancels out the oxygen in equation 1 and 2 to give the desired reaction equation.

H1 + H2 = -393.5 KJ + 483.6 KJ = 90.1 KJ

This means the heat of formation for this reaction gives a positive enthalpy, which makes this reaction endothermic.

Specific heat capacity of a substance is the amount of heat required to raise the temperature by one degree Celsius of one gram of a substance. Therefore, 90.1 KJ is the total enthalpy.

Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances. Internal energy is the sum of all kinds of energy that the particles of a matter can possess, for example translational energy. Rotational energy.

Equation 1 C(s) + O\(_2\) (g) \(\rightarrow\)CO\(_2\) (g) H₁= -393.5 KJ

Equation 2 2H\(_2\)O \(\rightarrow\)2H\(_2\)(g) + O\(_2\)(g) H₂ = 483.6 KJ

Adding the two equations together cancels out the oxygen in equation 1 and 2 to give the desired reaction equation.

H₁ + H₂ = -393.5 KJ + 483.6 KJ

H = 90.1 KJ

This means the heat of formation for this reaction gives a positive enthalpy, which makes this reaction endothermic.

Therefore, 90.1 KJ is the total enthalpy.

To know more about enthalpy, here:

https://brainly.com/question/24170335

#SPJ5

Carbon atoms may thus form bonds to as many as four other atoms. For example, in methane (CH 4​start subscript, 4, end subscript), carbon forms covalent bonds with four hydrogen atoms

__________________________________________________________

A) The chemical symbol for the ion is Fe+

B) It has 20 electrons in total, and there are 6 3p electrons in the ion.

C) There are 6 electrons present in the 3p orbital.

The atomic cation with the given electron configuration is represented by the chemical symbol Fe+.

To determine the number of electrons in the ion, we need to count the electrons present in the electron configuration. In the given configuration, we can see that the 1s orbital has 2 electrons, the 2s orbital has 2 electrons, the 2p orbital has 6 electrons, the 3s orbital has 2 electrons, the 3p orbital has 6 electrons, the 3d orbital has 1 electron, and the 4s orbital has 1 electron. Adding up these numbers, we have:

2 + 2 + 6 + 2 + 6 + 1 + 1 = 20

Therefore, the ion has 20 electrons.

To determine the number of 3p electrons in the ion, we look at the 3p orbital. In this case, there are 6 electrons present in the 3p orbital.

In summary, the chemical symbol for the ion is Fe+, it has 20 electrons in total, and there are 6 3p electrons in the ion.

For more question on electrons

https://brainly.com/question/26084288

#SPJ8

Since [H2NO2] is equal to zero in this case, the percent ionization is equal to 100%.

Ionization is the process of adding an electrical charge to a neutral atom or molecule, resulting in the formation of positively or negatively charged ions. The process involves the transfer of electrons from one atom or molecule to another, which can occur through chemical reactions, physical collisions, or exposure to radiation. Ionization is an important process in many fields, including chemistry, physics, and biology.

The pH of a .780 M HNO2 solution can be calculated using the Henderson-Hasselbalch equation. This equation states that the pH of a solution is equal to the pKa of the acid plus the logarithm of the base to acid ratio. In this case, the pKa of HNO2 is 3.4, so the pH is equal to 3.4 + log(.780/1) = 2.10.

The percent ionization of the solution can be calculated using the formula:

% ionization = ( [HNO2] - [H2NO2] ) / [HNO2] * 100

To learn more about ionization

https://brainly.com/question/30831422

#SPJ1

Answer:

Example 1

palladium(II) nitrate,

Example 2

Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.

Explanation

The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.

Answer:1. metyletevinyl

4. (Z)-3-hydroxypropenal

Explanation:

Answer:

The resulting solution is basic.

Explanation:

The reaction that takes place is:

First we calculate the added moles of HNO₃ and KOH:

As there are more KOH moles than HNO₃, the resulting solution is basic.

The resulting solution is basic.

• It is known that KOH is a base and HNO3 is an acid, so when they mix they undergo a neutralization reaction.  

• The reaction between there will be,  

HNO3 + KOH ⇔ KNO3 + H2O

Based on the given information,

• The volume of HNO3 is 12.5 ml and the molarity is 0.280 M, and the volume of KOH is 5 ml and the molarity is 0.920 M.

Now 1 mole of HNO3 completely reacts with 1 mole of KOH,

The millimoles of HNO3 is,

\(= Molarity * Volume (in ml)\\= 0.280 * 12.5\\= 3.5 mmol\)

The millimoles of KOH is,

\(= Molarity * Volume (in ml)\\= 0.920 * 5.0\\= 4.6 mmol\)

Now it can be seen that 3.5 millimoles of HNO3 completely reacts with 3.5 millimoles of KOH. Now we are left with 4.6-3.5 = 1.1 mmol of KOH.

Thus, KOH is in excess amount present in the solution, and as it is basic in nature, therefore, the resultant solution would be basic in nature.

To know more about:

https://brainly.com/question/12665051

Answer:

87.5 %

Explanation:

Step 1: Given data

Step 2: Calculate the percent yield

When working with chemical reactions, we can determine the efficience in obtaining a product measuring the percent yield. The theoretical yield is the maximum amount of product that we could obtain according to the stoichiometry, whereas the real yield is the amount of product that we actually obtain when we carry out the process. We can calculate the percent yield usign the following expression.

%yield = real yield / theoretical yield × 100%

%yield = 105 kg / 120 kg × 100%

%yield = 87.5 %

The north pole of one magnet is near the South pole of the other magnet.

The ends of a magnet are called its poles. One end is called the north pole, the other is called the south pole. If you line up two magnets so that the south pole of one faces the north pole of the other, the magnets will pull toward each other.

Element w is less reactive than elements x, y, and z. The element with the lower atomic number is typically less reactive.

Element w has an atomic number of 9, element x has an atomic number of 10, element y has an atomic number of 11, and element z has an atomic number of 12. Based on this information, we can conclude that element w is less reactive than elements x, y, and z.

This is because the reactivity of an element is largely determined by the number of valence electrons it has. Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical reactions. Elements with fewer valence electrons are less reactive because they are more stable. Element w has only one valence electron, while elements x, y, and z have two, three, and four valence electrons, respectively.

In general, elements with a full outermost shell of electrons, such as the noble gases, are the least reactive because they are highly stable. Elements that are close to having a full outermost shell, such as element w, are also relatively stable and less reactive. On the other hand, elements with only a few valence electrons, such as the alkali metals, are highly reactive because they are trying to gain or lose electrons in order to achieve a full outermost shell.

Overall, the reactivity of an element is determined by its electronic structure, with elements having fewer valence electrons generally being less reactive than those with more. In the case of the elements w, x, y, and z, we can see that element w has the fewest valence electrons and is therefore the least reactive.

For more such questions on Element

https://brainly.com/question/28376204

#SPJ11

Explanation:

The molar volume corresponds to the volume occupied by any gas at STP, which is equal to 22.4 L.

So:

22.4 L ---- 1 mol

3.56 L ---- x mol

x = 0.159 moles

To find the molar mass we use the following formula:

molar mass = mass/moles

molar mass = 11.3/0.159

molar mass = 71.1

Answer: 71.1 g/mole

Answer:

True

Explanation:

Rate of evaporation is directly proportional to temperature. Thus, the rate of evaporation is higher on a warm day than a cold day having low temperature and clothes dry faster on a warm day.

Answer:

heat is mesured in calories and also joules

Explanation:

Answer:

math si hard

Explanation:

The mole fration of ethanol and water in a sample of rectified spirit which contains 95% of ethanol by mass is 0.8 and 0.11.

Mole fraction of any substance will be calculated by dividing the moles of that substance from the total moles of the solution.

Moles (n) will be calculated as:

n = W/M, where

W = given mass

M = molar mass

Given that 95% of ethanol by mass is present in the sample, so 95g of ethanol is present in 100g of solution.

Mass of solvent (water) = 100 - 95 = 5g

Moles of water = 5g / 18g/mol = 0.27mol

Moles of ethanol = 95g / 46g/mol = 2.06mol

Mole fraction of water  = 0.27 / (0.27+2.06) = 0.11

Mole fraction of ethanol = 2.06 / (0.27+2.06) = 0.8

Hence required mole fraction of water & ethanol is 00.11 and 0.8 respectively.

To know more about mole fraction, visit the below link:

https://brainly.com/question/1601411

#SPJ2

Answer:

a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.

Explanation:

Answer:

\(Ba\ percentage\ in\ Mass=4.8\%\)

Explanation:

From the question we are told that:

Mass of mixture \(m=3.455g\)

Mass of Barium \(m_b=0.2815g\)

Equation of Reaction is given as

\(Ba2+ + H2SO4 => BaSO4 + 2 H+\)

Generally the equation for Moles of Barium  is mathematically given by

Since

 \(Moles of Ba^{2+} = Moles of BaSO_4\)

Therefore

 \(Moles of Ba^{2+} = \frac{mass}{molar mass of BaSO4}\)  

 \(Moles of Ba^{2+} = \frac{0.2815}{233.39}= 0.0012061 mol\)

Generally the equation for Mass of Barium  is mathematically given by

 \(Mass\ of\ Ba^{2+} = Moles * Molar mass of Ba^{2+}\)  

 \(Mass\ of\ Ba^{2+} = 0.0012061 * 137.33 = 0.1656 g\)

Therefore

 \(Ba\ percentage\ in\ Mass = mass of Ba^{2+}/mass of sample * 100%\)    

 \(Ba\ percentage\ in\ Mass= \frac{0.1656}{ 3.455 }* 100%\)

 \(Ba\ percentage\ in\ Mass=4.8\%\)

You should drink 1.6 × 10² fl oz of fruit juice with a vitamin C concentration of 1.602 mg/100mL in order to consume 75 mg of vitamin C.

The average concentration of vitamin C in the given fruit juice is 1.602 mg/100mL, that is, there are 1.602 mg of vitamin C per 100 mL of juice. The volume of juice that contains 75 mg of vitamin C is:

\(75mg\ vitamin\ C \ times \frac{100mL\ Juice}{1.602mg\ vitamin\ C} = 4.7 \times 10^{3} mL\ Juice\)

Then, we will convert 4.7 × 10³ mL to fluid ounce using the following conversion factors:

\(4.7 \times 10^{3} mL \times \frac{1L}{1000mL} \times \frac{33.8 fl\ oz}{1L} = 1.6 \times 10^{2} fl\ oz\)

You should drink 1.6 × 10² fl oz of fruit juice with a vitamin C concentration of 1.602 mg/100mL in order to consume 75 mg of vitamin C.

You can learn more about unit conversion here: https://brainly.com/question/19420601

Answer:

\(\huge\boxed{\sf M = 0.06\ M}\)

Explanation:

No. of moles = n = 0.03 mol

Volume = v = 500 ml = 0.5 L

Molarity = M = ?

M = n / v

Put the given data in the above formula.

M = 0.03 / 0.5

\(\rule[225]{225}{2}\)

Answer:

Explanation:

Combined Gas Law

T2= T1P2V2/ (P1V1) = 348.15 X .5 X 3.4/(2 X 7.5) =39.46 K or -233.69C

The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. The frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. However, for the photoelectric effect to occur, the frequency of the incident light must be above a certain threshold frequency.

The threshold frequency is the minimum frequency of light required to dislodge electrons from the material. Below this threshold frequency, regardless of the intensity or duration of the light, no electrons will be emitted.

This behavior can be explained by the particle-like nature of light, where light is composed of discrete packets of energy called photons. The energy of a photon is directly proportional to its frequency. Only photons with energy greater than or equal to the binding energy of the electrons in the material can dislodge them.

Therefore, the frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

For more question on photoelectric

https://brainly.com/question/1458544

#SPJ8

Perch, frog, pigeon, and other species evolution would not have arisen prior to the derived shared trait of jaws and after the common ancestor.

The development of jaws in the bodies of our ancestors was a critical phase in the evolution of vertebrates, including humans. The earliest jawed vertebrates, called gnathostomes, descended from jawless fish and appeared in the fossil record around 420 million years ago.

Rats and people are both warm-blooded creatures that give birth to live children; both have similar organs, such as hearts and livers; both have comparable neurological systems; both employ comparable hormones to regulate body functions.

To know more about evolution visit:-

https://brainly.com/question/13484097

#SPJ1

Answer:

water

Explanation:

or h2o i mean theyre the same thing soo..

The total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by Ni2+(ag) is also 2.0 moles of electrons.

This is because in a chemical equation, the number of moles of electrons gained by the reducing agent (in this case Ni2+) is equal to the number of moles of electrons lost by the oxidizing agent (in this case Mg(s)).

In this redox reaction, Mg is being oxidized because it loses electrons and Ni is being reduced because it gains electrons. The oxidation and reduction process are occurring simultaneously, so the number of electrons lost by Mg(s) is equal to the number of electrons gained by Ni2+(ag).

Learn more about moles of electrons in brainly.com/question/512038

#SPJ1

The electrons that are gained by the \(Ni^{2+}\) ion is 2.0 moles of electrons.

We know that when there is a redox reaction, there would be the loss or gain of electrons in the process. The process is a simultaneous one so the electrons that are lost by one specie must as a matter of necessity be gained by another specie.

In this case, as we look at the reaction equation we can see that there are two electrons that have been lost by the magnesium atom and these two electrons would be gained by the Nickel II ion.

Learn more about redox reaction:https://brainly.com/question/13293425

#SPJ1

To determine the partial pressure of chloroform vapor, we can use Raoult's law. According to Raoult's law, a component's partial pressure in a solution is equal to its vapor pressure.

What does Raoult's law entail?

To learn more about Raoult's law

brainly.com/question/9720507

#SPJ4

Answer:

Glucose!!

Explanation:

Also keep in mind that the actual sugar produced from photosynthesis is C6H12O6, which is the basis for glucose as well as other complex molecules

Answer:

Glucose

Explanation:

photosynthesis uses the energy from the light to convert carbon dioxide molecules which makes glucose

Answer:

A

Antoine-Laurent Lavoisier

:D

The scientist was most essential to the use of radioactive isotopes in medicine is " John Lawrence's".

The radioactive isotopes of such an element were called radioisotopes. Atoms that have too much energy in their nucleus or even an unstable neutron-proton pair.

It marked the beginning of John Lawrence's lengthy career of service and the first time a radioactive isotope had already been employed in the management of a human illness. His laboratory is regarded as the origin of nuclear medicine, for which he is regarded as its father.

The scientist most essential to the use of radioactive isotopes in medicine is " John Lawrence's".

To know more about radioactive isotopes.

https://brainly.com/question/1907960

#SPJ3

Answer:

development of cancer drugs

Explanation:

The molecular formula of the compound is determined as P₂F₄.

Molecular formula tells us which atoms and how many of each type of atom are present in the molecule.

Molar mass of CaF₂ is 78.07 g/mol(0.2631 g  CaF₂) × (1 mol  CaF₂ / 78.07 g  CaF₂) = 0.00337 mol  CaF₂

2F- + Ca₂+ →  CaF₂

(0.00337 mol  CaF₂) × (2 mol F / 1 mol  CaF₂) = 0.00674 mol F

As, Molar mass of F is 18.9984 g/mol

So, (0.00674 mol F) × (18.9984 g F / 1 mol F) = 0.12805 g F

1 mmHg = 0.00131578947 atm

(97.3 mmHg) × (0.00131578947 atm / 1 atm) = 0.128 atm

(378 cm³) × (1L / 1000 cm³) = 0.378 L

Now, T = 77 + 273 = 350 K

As, PV = nRT

n(PxFy) = PV / RT

n(PxFy) = (0.128 atm × 0.378 L) / (0.0821 L atm mol-1 K-1 × 350 K) = 0.001684 mol

n(PxFy) = 0.001684 mol

n(PxFy) = m(PxFy) / M(PxFy)

M(PxFy) = m(PxFy) / n(PxFy) = (0.2324 g) / (0.001684 mol) = 138 g/mol

m(PxFy) = m(P) + m(F)

0.2324 g = m(P) + 0.12805 g

m(P) = 0.2324 - 0.12805 = 0.10435

m(P) = 0.10435 g

Molar mass of P is 30.9737 g/mol

so, (0.10435 g P) × (1 mol P / 30.9737 g P) = 0.003369 mol P

Now, n(P) : n(F) = 0.003369 mol : 0.00674 mol = 1 : 2

Therefore, empirical formula of PxFy is PF₂

Molar mass of PF₂ 68.9705 g/mol

Molecular formula of PxFy is ( PF₂)n

n = M(PxFy) / M( PF₂) = (138) / (68.9705) = 2

Therefore, the molecular formula of PxFy is P₂F₄.

To know more about molecular formula, refer

https://brainly.com/question/13058832

#SPJ1