Answer:
London dispersion < hydrogen bonds< covalent bonds< ionic interactions
Explanation:
Molecules interact with each other in each of the states of matter. The extent and type of intermolecular interaction exhibited by a substance depends on the nature of bonding between the atoms of the substance.
Intermolecular interactions determine important properties of a substance such as melting and boiling points, polarity etc.
The order of increasing interaction is;
London dispersion < hydrogen bonds< covalent bonds< ionic interactions
Bacterial pathogens are grown in devices using a __________ developed to optimize the yield of the antigen while maintaining it's integrity.
Answer:
growth medium
Explanation:
The pathogenic bacteria are the bacteria which causes diseases. They may include fungi, worms, protozoa, viruses, bacteria, etc.
The bacterial pathogens are made to grow with the help of a growth medium which is developed to optimize the antigen's yield and also it maintains the integrity of the pathogenic bacteria.
What is the safe way to dispose of a compound containing mercury?
Answer:
Put the items that contains mercury in a zipper top bag and seal the bag. Place the sealed bag in a plastic container with a lid. Pack the container with kitty litter or newspapers to prevent breakage. Make sure the container is labeled “Mercury: Do Not Touch.”
Explanation:
Imagine that you have 0.75L of a 0.10M HCl solution. If you add 0.35L of water, what is the new concentration of the solution?
Answer:
[tex]1 \: litre \: contain \: 0.10 \: moles \: of \: hydrochloric \: acid \\ 0.75 \: litres \: contain \: (0.75 \times 0.10) \: moles \\ = 0.075 \: moles \\ total \: volume = 0.75 + 0.35 \\ = 1.1 \: litres \\ 1.1 \: litres \: contain \: 0.075 \: moles \\ 1 \: litres \: will \: contain \: ( \frac{1 \times 0.075}{1.1} ) \\ = 0.068 \: mol \: {l}^{ - 1} [/tex]
On Greg's last visit to his doctor, he complained of feeling tired. Sandra, the registered nurse, withdrew 6.5 mL of blood, which was sent to the lab and tested for iron. The normal range for serum iron in men is 80 to 160 mcg/dL. Greg's iron test showed a blood serum iron level of 39 mcg/dL, How many micrograms of iron were in the 6.5-mL sample of Greg's blood?
Answer:
2.5 mcg of iron
Explanation:
Density is given as;
D= m/v
Where;
m= mass
v= volume
mass= ?
volume= 6.5 ml or 0.065 dl
d= 39 mcg/dL
m= density × volume
m= 39 mcg/dL × 0.065 dl
m= 2.5 mcg of iron
What is the molarity of a 750 milliliters solution containing 54.0 grams of KBr (help me please)
Answer: The molarity of KBr solution is 0.605 M
Explanation:
Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L.
The formula used to calculate molarity:
[tex]\text{Molarity of solution}=\frac{\text{Given mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (mL)}}[/tex] .....(1)
Given values:
Given mass of KBr = 54.0 g
Molar mass of KBr = 119 g/mol
Volume of the solution = 750 mL
Putting values in equation 1, we get:
[tex]\text{Molarity of solution}=\frac{54.0\times 1000}{119\times 750}\\\\\text{Molarity of solution}=0.605M[/tex]
Hence, the molarity of KBr solution is 0.605 M
hola genteee ayuda me pueden decir 5 propiedades físicas y 5 propiedades químicas del ácido sulfúrico porfa es urgente !
Answer:
La respuesta está en la explicación.
Explanation:
Las propiedades físicas son las visibles y medibles que no afectan químicamente la sustancia en cuestión. Las propiedades químicas hacen alusión a la reactividad de la sustancia:
Propiedades físicas ácido sulfúrico:
Líquido a temperatura ambiente.
Densidad: 1.83g/mL
Punto de fusión: 10°C
Punto de ebullición: 337°C
Índice de refracción: 1.397
Propiedades Químicas:
Ácido Fuerte.
Oxidante Fuerte.
Miscible con el agua reaccionando exotérmicamente.
A temperaturas > 30°C produce vapores azufrados.
Estable en concentraciones menores al 98%
Reaction of hypochlorous acid and ammonia is product-favored system at equilibrium. Answer A: Reaction of hypochlorous acid and ammonia is product-favored system at equilibrium. A Reaction of hypochlorous acid and ammonia is reactant-favored system at equilibrium. Answer B: Reaction of hypochlorous acid and ammonia is reactant-favored system at equilibrium. B Reaction of hypochlorous acid and ammonia yields pH 7.00. Answer C: Reaction of hypochlorous acid and ammonia yields pH 7.00. C No reaction occurs between hypochlorous acid and ammonia. Answer D: No reaction occurs between hypochlorous acid and ammonia. D Further data are needed to draw a conclusion about a prospective reaction.
Answer:
A. True
B. False
Explanation:
Reaction between hypochlorous acid and ammonia does not yields a Ph value of 7.00 , this value is defined to water and no other reaction can yield exactly this Ph value. The acid reaction will give a Ph value below 7 while a base reaction will give Ph value of above 7.
Please help on how to solve this problem it’s for isotopes
Mg-19:
#protons = 12
#neutrons = 7
#electrons = 12
Mg-40:
#protons = 12
#neutrons = 28
#electrons = 12
Concentrations-
What is the final molarity of HCI if water is added to 17.8 mL of a 5.87 M HCI solution until the volume is 172 mL? (hint: find the moles in the original solution; the final solution will have the same number of moles)
If possible, provide work
helppppp meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Answer:
The industry represented in the photo is most likely fishing. Other industries that rely on accurate weather forecasts are shrimping, fishery, and aquaculture
Explanation:
De acuerdo con la primera ley de kihrechhoff determina las intensidades desconocidos así como su sentido. Ayudaaaa:(
oh sorry I'm American I can't understand that
Explanation:
but...thanks for points hehe
Question 8 of 10
Which functional group is within the compound shown below?
R-OH
A. Carbonyl
B. Amino
C. Ester
D. Hydroxy
Answer:
Hydroxyl (alcohol compound)
Explanation:
*view photo*
D. Hydroxy
A hydroxy or hydroxyl group is a functional group with the chemical formula -OH and composed of one oxygen atom covalently bonded to one hydrogen atom.Hydroxyl groups are polar, and the oxygen side is always negative, while the hydrogen side is always positive.The functional group of the alcohols is the hydroxyl group, –OH.For example: Methanol is an alcohol containing hydroxyl functional group.Therefore, the correct option is option D.
Learn more:
brainly.com/question/696051
Which Reference Tables must be used to determine the number of carbon atoms in a parent chain and the type of bonding between the atoms in the parent chain?
O Table P, only
O Table P and Table O, only
O Table N and Table O, only
O Table P and Table Q, only
Answer:
Explanation:
Did you get the answer to the test, I have the same one but don’t understand the questions that well
8 How did reducing the number of
decomposers affect the amount of carbon
dioxide in the ecosystem?
Answer:
Explanation:
As organisms release energy during cellular respiration, carbon dioxide is produced from the carbon in energy storage molecules. ... Carbon dioxide in the biodome decreased because decomposers decreased which means there was a decrease in cellular respiration overall.
If the universe is expanding but the expansion is slowing down, what will the eventual
death of the universe be? *
A beaker of water is placed in a large sealed jar that is attached to a vacuum pump. As air is pumped
out of the jar, the water begins to boil because --
Answer:
C
Explanation:
As air is pumped out of the jar, the water begins to boil because "the air pressure in the jar has been lowered until it is equal to the vapor pressure of the water."
What is pressure?The force is applied perpendicular to an object's surface per unit area across which that force is spread is known as pressure. The pressure gauge in relation to the higher pressures would be known as gauge pressure. Pressure is measured in a variety of ways.
What is vapor pressure?Equilibrium or vapor pressure The pressure exerted by a vapor in thermodynamic equilibrium including its condensed phases at a particular temperature in a closed system is known as vapor pressure.
The temperature where the vapor pressure of liquid water matches the ambient pressure is known as the boiling point of water. Because we know that pressure, temperature, as well as temperature, are directly related, water with a high boiling point will have a high boiling point, whereas water with a low boiling point will have a low boiling point.
When we maintain a vacuum (pressure lower than atmospheric pressure), water starts to boil at temperatures below 100 degrees Celsius.
Hence the correct answer will be option 3
To know more about air pressure here
https://brainly.com/question/25699778.
#SPJ2
WHAT IS EXOTHERMIC EXPLAIN
Explanation:
An exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative." Exothermic reactions usually release heat and entail the replacement of weak bonds with stronger ones.
hope it helps
stay safe healthy and happy..Answer:
Exothermic reactions are reactions or processes that release energy, usually in the form of heat or light. In an exothermic reaction, energy is released because the total energy of the products is less than the total energy of the reactants.Explanation:
I hope this helps u have a nice day ☘Which is the graph of y = 5x + 5?
Answer:
I'm pretty sure it's The second one
Explanation:
That one is the only one that looks like it started on a positive 5
Answer:
B
Explanation:
Heat energy can transfer in and out of both open and closed systems
True
False
Answer:
True
Explanation:
Reason being there are 3 systems even in the open system the heat and matter goes in and out , the closed system the heat goes in and out as well and in the isolated system it stays in
Which of the following weighs least?
a) 0.2g of atoms of N
b) 1 mole of
o 3x10 23 atoms of
d 79 of Ag
Answer:
A
Explanation:
0.2g of atom of nitrogen is the one that weigh least cause of.2g is not up to one mole of nitrogen
Based upon the following diagram, propose a possible identity for atoms X and Y. Explain your answer in terms of the periodic table and ionic bonding. Lastly, explain why the atoms bond in this ratio.
Answer:
Up until now we have been discussing only the elemental forms of atoms which are neutrally charged. This is because the number of electrons (negative in charge) is equal to the number of protons (positive in charge). The overall charge on the atom is zero, because the magnitude of the negative charge is the same as the magnitude of the positive charge. This one-to-one ratio of charges is not, however, the most common state for many elements. Deviations from this ratio result in charged particles called ions.
Throughout nature, things that are high in energy tend to move toward lower energy states. Lower energy configurations are more stable, so things are naturally drawn toward them. For atoms, these lower energy states are represented by the noble gas elements. These elements have electron configurations characterized by full s and p subshells. This makes them stable and unreactive. They are already at a low energy state, so they tend to stay as they are.
The elements in the other groups have subshells that are not full, so they are unstable when compared to the noble gases. This instability drives them toward the lower energy states represented by the noble gases that are nearby in the periodic table. In these lower energy states, the outermost energy level has eight electrons (an “octet”). The tendency of an atom toward a configuration in which it possesses eight valence electrons is referred to as the “Octet Rule.”
There are two ways for an atom that does not have an octet of valence electrons to obtain an octet in its outer shell. One way is the transfer of electrons between two atoms until both atoms have octets. Because some atoms will lose electrons and some atoms will gain electrons, there is no overall change in the number of electrons, but with the transfer of electrons the individual atoms acquire a nonzero electric charge. Those that lose electrons become positively charged, and those that gain electrons become negatively charged. Recall that atoms carrying positive or negative charges are called ions. If an atom has gained one or more electrons, it is negatively charged and is called an anion. If an atom has lost one or more electrons, it is positively charged and is called a cation. Because opposite charges attract (while like charges repel), these oppositely charged ions attract each other, forming ionic bonds. The resulting compounds are called ionic compounds.
The second way for an atom to obtain an octet of electrons is by sharing electrons with another atom. These shared electrons simultaneously occupy the outermost shell of both atoms. The bond made by electron sharing is called a covalent bond. Covalent bonding and covalent compounds will be discussed in Chapter 4 “Covalent Bonding and Simple Molecular Compounds”.
At the end of chapter 2, we learned how to draw the electron dot symbols to represent the valence electrons for each of the elemental families. This skill will be instrumental in learning about ions and ionic bonding. Looking at Figure 3.1, observe the Noble Gas family of elements. The electron dot symbol for the Nobel Gas family clearly indicates that the valence electron shell is completely full with an octet of electrons. If you look at the other families, you can see how many electrons they will need to gain or lose to reach the octet state. Above, we noted that elements are the most stable when they can reach the octet state. However, it should also be noted that housing excessively high negative or positive charge is unfavorable. Thus, elements will reach the octet state and also maintain the lowest charge possible. You will note that for the IA, IIA, IIIA and transition metals groups, it is more economical to lose electrons (1-3 electrons) from their valence shells to reach the octet state, rather than to gain 5-7 electrons. Similarly main group columns VA, VIA, and VIIA tend to gain electrons (1-3) to complete their octet, rather than losing 5-7 electrons. Some atoms, like carbon, are directly in the middle. These atoms don’t like to gain or lose electrons, but tend to favor the sharing model of chemical bonding. The remaining sections of this chapter will focus on the formation of ions and the resulting ionic compounds.
Explanation:
If a sample of oxygen has a volume of 160 L at 91 degrees celsius what will the oxygen be when the temperature drops to 0.00 degrees celsius.
Answer:
120 L
Explanation:
Step 1: Given data
Initial volume (V₁): 160 LInitial temperature (T₁): 91 °CFinal volume (V₂): ?Final temperature (T₂): 0.00 °CStep 2: Convert the temperatures to the Kelvin scale
We will use the following expression.
K = °C + 273.15
K = 91°C + 273.15 = 364 K
K = 0.00°C + 273.15 = 273.15 K
Step 3: Calculate the final volume occupied by the oxygen
Assuming ideal behavior and constant pressure, we can calculate the final volume occupied by the oxygen using Charles' law.
V₁/T₁ = V₂/T₂
V₂ = V₁ × T₂/T₁
V₂ = 160 L × 273.15 K/364 K = 120 L
Please let me know whether did I chose the correct answer for the following pictures. Please answer it with your knowledge not for the points, I really need this, thanks!!
Answer:
With my knowledge you got 2. correct, but that's all I could say.
Por qué razón se fomentó la inmigración Europea?
Hola aquí va la respuesta!
Se fomentó la inmigración europea porque la economía no era buena y vinieron a Paraguay para mejorar su situación.
Hola aquí va la respuesta!
Se fomentó la inmigración europea porque la economía no era buena y vinieron a Paraguay para mejorar su situación.
What is the frequency of a photon with an energy of 3.26 x 10-19 J?
A. 2.03 x 1014 Hz
B. 4.92 x 1014 Hz
c. 6.10 * 1014 Hz
ОС
D. 5.69 x 1014 Hz
Answer:
B.
[tex]from \: eisteins \: energy \: relation : \\ E = hf \\ h \: is \: plancks \: constant\\ 3.26 \times {10}^{ - 19} = 6.63 \times {10}^{ - 34 } \times f \\ f = \frac{3.26 \times {10}^{ - 19} }{6.63 \times {10}^{ - 34} } \\ f = 4.92 \times {10}^{14} \: Hz[/tex]
What is radioactive decay?
Answer:
Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles or photons.
Explanation:
If mother is mother who is the real mother
Answer:
mother
Explanation:
What happens when water dissolves in Ammonia?
A) Water acts as a proton acceptor
B) Water acts as a proton donor
C) Water acts as a strong base
D) Water acts as a strong acid
Answer:
C) Water acts as a strong base
Explanation:
The water acts as a strong base, when water dissolves in Ammonia.
Ammonia reacts with water to make a clear solution of ammonium hydroxide, or household ammonia.
Please help it’s due today
Estimate the heat evolved when 74.6 g of sulfur dioxide (molar mass = 64.07 g/mol) is
converted to sulfur dioxide for the given thermochemical equation.
SO2(g) + 12 O2(g)
SO3(g)
AH = -99.1 kJ/mol
The heat evolved when 74.6 g of sulfur dioxide (molar mass = 64.07 g/mol) is 2838kJ/mol. For the given thermochemical equation.
SO2(g) + 12 O2(g)
SO3(g)
AH = -99.1 kJ/mol
What is thermochemical equation ?A balanced stoichiometric chemical equation known as a thermochemical equation contains the enthalpy change, ΔH.
There are two types of thermochemical reaction:
Thermogenic Reaction. certain thermochemical processes that absorb heat. Enthalpy change for this reaction is favorable.
Heat-producing Reaction. Exothermic reactions are those in which energy or heat are released during the reaction.
A chemical equation shows the initial molecule, reactants, and final products separated by an arrow, but a thermochemical equation is a balanced stoichiometric chemical reaction that also includes the enthalpy change.
Thus, 2838 kJ/mol heat evolved in given equation.
To learn more about thermochemical equation refer the link below;
https://brainly.com/question/10023358
#SPJ2
What is the chemical formula of calcium chloride?
A.
CaCl
B.
Ca2Cl2
C.
Ca2Cl
D.
CaCl2
Answer:
D
Explanation:
calicium exchange valency of 2 with 1 valency of chlorine
