Answer:
there is no question posted
I need help with the question below:
[tex]PCl_5 = PCl_3+Cl_2 \\ [/tex]
Where PCl5 and PCl3 are gasses
In the above equation , Predict the effect of change in :
I. Temperature
ii. Pressure
iii. Removal of Chlorine
Answer:
1: As the temperature rises, the equilibrium moves towards the products
2: The higher the pressure, the higher the equilibrium goes to the reactants
3: By removing chlorine, the equilibrium moves towards the products
when a rotting log was turned over, pill bugs, termites , ants , fungi , and earthworms were living there. the termites represent ____ in its
a. an environment
b. a population
c. a niche
d. an abiotic factor
3) Explain why elements in the same group
similar properties
Answer:
The elements of the same group have the same number of valence electrons, that is why they have similar properties
Which feature separates watershed
Answer:
Ridges.
Explanation:
Watersheds are separated from one another by ridges. Ridges are elevated boundaries that divide watersheds.
Help quickly pleaaas
Answer:
chymotrypsin, cleaves peptide bonds selectively on the carboxylterminal side of the large hydrophobic amino acids such as tryptophan, tyrosine, phenylalanine, and methionine
Under certain conditions butane reacts with oxygen to form butanone which can be easily hydrogenated to butanol. Butene is easily made from butanol by elimination of water.
Explanation:
These are for the first too
Pl help it’s for a grade
Answer:
A
Explanation:
kinetic energy of a body at rest = 0
Using the rules of electron configurations is this a valid orbital diagram?
Select the most reactive metal from the options below
Iron
Copper
Zinc
Gold
Answer: Hello, This is my most favorite class so I know this is right.
The most Reactive metal source is Copper.
Explanation:
This is the most reactive because it contains Lithium supplement.
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How many moles are in 297g of nh3?
Please show work, will give brainliest.
Answer:
17.5moles
Explanation:
The number of moles in a substance can be calculated by using the formula;
Number of moles (n) = mass (m) ÷ molar mass (MM)
According to this question, mass of ammonia (NH3) = 297g
Molar Mass of NH3 = 14 + 1(3)
= 17g/mol
n = 297/17
n = 17.47
Number of moles of NH3 = 17.5moles
Does a reaction occur when aqueous solutions of sodium sulfide and manganese(II) chloride are combined?
Oyes Ono
If a reaction does occur, write the net ionic equation.
Answer:
Yes, a reaction occurs
Explanation:
net ionic equation
Mn 2+ (aq) + S 2- (aq) --> MnS (s)
Explain how low atomspheric oxygen levels affected alligators growth in terms of celluar respiration
Answer:
Answer: Hyperoxic alligators show significantly lower breathing rates than their siblings in normoxic and hypoxic groups. Conversely, each breath supports greater oxygen consumption in hyperoxic animals than in other groups. Statistical significance between groups was calculated by ANOVA with post hoc Tukey-Kramer
The explanation regarding the less atmospheric oxygen levels impacted the alligators growth should be because of Hyperbolic alligators.
What is Hyperbolic alligators?There should be less breathing rate and the consumption of the oxygen should be high per breath.
The compensatory cardiopulmonary remodeling, the growth of the hypnotic alligators should be constrained by the less temperature with respect to the supply of the oxygen that should limited the food utilization capacity.
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in what two ways do minerals form
Answer:
Minerals can form in three primary ways being precipitation, crystallization from a magma and solid- state transformation by chemical reactions (metamorphism). Mineral Precipitation is when a mineral is formed by crystallization from a solution. Examples include quartz, halite (table salt), calcite, and gypsum.
Answer:
When magma cools slowly, deep below the surface, it has time to form large crystals in regular patterns. The second way that minerals form is through solutions. (A solution is when one substance is dissolved uniformly in a liquid.) When elements and compounds leave the solution, they can crystalize.
Chemical equation=CH4 + O2 = CO2 + H2O.
i. identify the products of the chemical reaction.
ii. explain why these are the products based on trends in the periodic table (the number of
valence electrons, electronegativity, etc.).
iii. identify the types of bonds in the reactants and products.
iv. identify the number of each type of bond in the reactants and products.
v. identify the type of reaction
Answer:
1.The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.The combustion of methane or octane is exothermic; it releases energy. CH4 + 2 O2 → CO2 + 2 H2O + energy The energies of the products are lower than the energiies of the reactants.
Explanation:
is zinc an example of a metal or nonmetal?
Answer:
*Metal= iron, copper, aluminium, lead, Mercury, zinc, chromium, Nickel, gold, silver, Platinum. *Non-metal= sulphur, oxygen, nitrogen, Phosphorus, hydrogen, chlorine, Silicon, Iodine.
Explanation:
Answer:
Metal!!!
Explanation:
Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a blue-silvery appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic table. Zinc (Zn), chemical element, a low-melting metal of Group 12 (IIb, or zinc group) of the periodic table, that is essential to life and is one of the most widely used metals. Zinc (Zn) is an abundant metal, found in the Earth's crust, with a myriad of industrial and biological uses. ... A base metal, zinc is primarily used to galvanize steel, a process that protects the metal against unwanted corrosion.
A student wanted to study the effect of temperature on algae levels in a
local stream. Which items are most useful for gathering data and most
appropriate for communicating the results of her observations?
Select one:
Microscopes and written descriptions of weather patterns
Research on the Internet and videotapes of water samples
pH strips and written observations of stream water
Test tubes, thermometers, and graphs of results
Answer:
pH strips and written observations of stream water
Explanation:
What are the three major categories used to classify elements?
a Solids, liquids, gases
b Protons, neutrons, electrons
c Groups, periods, states
d Metals. non-metals, metalloids
Answer:
i think option no. " D " = " metals, non-metals, metalloids " is the correct answer.
hope this answer will help u.
have a great time
Which of the following is a neutralization reaction?
a
SiCl4 + 4 H2O → H4SiO4 + 4 HC
b
HCl + NaOH → NaCl + H2O
c
6 CO2 + 6 H2O → C6H12O6 + 6 O2
d
2Al + 6HCl → 2AlCl3 + 3H2
Answer:
B
Explanation:
B, Hcl + NaoH = NaCl + H2O
how many grams of sulphur contain 3.0×1021 atoms
Answer:
There are 0.16 g of sulphur in 3.0 × 10²¹ atoms.
Explanation:
One mole of a substance contains 6.02 × 10²³ particles
One mole of sulphur atom contains 6.02 × 10²³ atoms
Number of moles of sulphur present in 3.0 × 10²¹ atoms = 3.0 ×10²¹/6.02 10²³
Number of moles of sulphur atom = 0.00498 moles of sulphur atom
The mole of a substance is related to its mass by a quantity known as molar mass which is defined as the mass of one mole of that substance.
Molar mass of sulphur atom = 32 grams per mole (g/mol)
Mass of 0.00498 moles of sulphur atom = 0.00498 moles × 32 g/mol
Mass of sulphur = 0.16 g
Therefore, there are 0.16 g of sulphur in 3.0 × 10²¹ atoms.
Which statement is true about solids?
Their particles can flow over one another, so they have a fixed volume but no fixed shape.
Their motionless particles are packed together in a fixed arrangement.
Their vibrating particles are packed together in relatively fixed positions.
Their fast-moving particles can expand to take the shape of their container.
Answer:
3
Explanation:
Answer:
Their vibrating particles are packed together in relatively fixed positions.
Explanation:
As you can see in the image below, solid is packed together.
please everyone do this and send me
Answer: question 2 is (a) (25+273)k=298k(b) (373+273)k=646k
question 5 is 25 degree Celsius
question 1 is
a = (293-273) =20 degree Celsius
b = (470-273)=197 degree Celsius
question 3 is
a = naphthalene ball undergo sublimation due to which it convert directly into vapour and disappear into air without leaving any solid
b = the participle of perfume diffuse rapidly into air and its smell can be felt while sitting serval metre away
question 4 isthe force of allraction between the particles increases as we go from liquid to gas so the required order is : Oxygen< water< sugar
I hope it is helpful to you
This unit discusses in detail the role of catalysts to lower the activation energy of reactions. The term catalyst appears in nonscientific discussions to refer to something that provokes or speeds significant change or action. Consider this example from the 2006 Associated Press article "Chernobyl cover-up a catalyst for glasnost":
"For the Soviet Union, Chernobyl was a catalyst that forced the government into an unprecedented show of openness that paved the way for reforms leading to the Soviet collapse"
Discuss how this scientific term has made its way into common usage. Does the term catalyst carry the same meaning in regular usage? How is it used differently in a scientific context compared to a nonscientific contexte
Answer:
It can be brought into regular conversation easily I feel it means to "provoke" or "speeds significant change or action" I can see someone saying that in a conversation, "chlorine acts as a catalyst promoting the breakdown of ozone".
I would say it would take the same meaning depending on how you say it and when and what the context of what you're saying it in.
For scientists, it means to change quickly. For someone who says it in a conversation may be saying to stop provoking someone.
Explanation:
What Effect on the temperature of a boiling liquid and on it's distillation temperature is produced by a soluble nonvolatible impurity
Answer:
What effect on the temperature of a boiling liquid and on its distillation temperature is produced by each of the following?(a)A soluble, nonvolatile impurity? It would cause the mixture to boil at higher temperature and increase the distillation temperature.
It would cause the mixture to boil at a higher temperature and increase the distillation temperature.
What is distillation?Distillation is a process involving the conversion of a liquid into a vapour that is subsequently condensed back to liquid form.
During distillation, substances separate based on their boiling points. The boiling point of the mixture varies as vapour rises in a distillation column, due to changes in temperature and pressure. This process divides distillation into stages.
Hence, It would cause the mixture to boil at a higher temperature and increase the distillation temperature.
Learn more about distillation here:
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A student titrates an unknown weak acid, HA, to a pale pink phenolphthalein endpoint with 25.0 mL of 0.100 M NaOH. The student then titrates in 11.0 mL of 0.100 M HCl to the solution containing the neutralized unknown acid (HCl was delivered from a second buret). The pH of the resulting solution is pH
Answer:
Hello your question is incomplete the pH of the solution is unknown hence I will take the pH of the solution be = 4.7
answer : Pka = 5 i.e. > 4.7
Explanation:
Student titrates :
Unknown weak acid ( HA ) with 25 mL of 0.100 M of NaOH ( to a pale pink phenolphthalein endpoint ) then titrates with 11.0 mL of 0.100 M HCL to the solution that contains neutralized unknown acid
Assuming pH of solution = 4.7
HA + NaOH --------> H2O + NaA
at equilibrium point
0.1 * 25 * 1 = n * 1 ∴ [tex]n_{ha}[/tex] = 2.5 mmoles ------ 1
also
[tex]A^-[/tex] + HCL ---------> HA + C[tex]L^-[/tex]
at equilibrium point
[tex]n_{a}[/tex] = 1.1 mmoles --------- 2
The ratio of reaction 2 to 1
[tex]\frac{n_{a} }{n_{ha} }[/tex] = 1.1 / 2.5 ≈ 1/2 ( this show that when the pH = 4.7 approximately half of the A^- have been converted to HA )
Determine the pKa value of the solution
Given that
pH = Pka + log ( A^- / hA )
4.7 = Pka + log ( 1/2 )
therefore Pka = 4.7 - ( -0.3 ) = 5
An alpha particle is composed of He2+ ions?
true or false
Answer: The given statement is False.
Explanation:
Alpha particle is a helium nuclei.
Alpha particles are produced when a larger nuclei decays into smaller nuclei in radioactive decay. Alpha particles have mass number and atomic number as 4 and 2 respectively.
General representation of alpha decay :
[tex]^A_Z\textrm{X}\rightarrow ^{A-4}_{Z-2}\textrm{Y}+^4_2\textrm{He}[/tex]
Thus the given statement that alpha particle is composed of [tex]He^{2+}[/tex] ions is False.
The statement of [tex]\rm He^2^+[/tex] ions has formed the alpha particles is true.
Alpha particles are particles that have been similar to the He-4, with the presence of two protons and two neutrons. The alpha particles have the absence of electrons and have been formed during the alpha decay.
[tex]\rm He^2^+[/tex] has been the ion of He with the positive charge indicating the loss of 2 electrons. Thus, in [tex]\rm He^2^+[/tex], there has been 2 protons, 2 neutrons, and 0 electrons.
The atomic configuration of [tex]\rm He^2^+[/tex]has been similar to the alpha particles. Thus, the statement stating, "the alpha particles to be composed of [tex]\rm He^2^+[/tex]ions " is True.
For more information about the alpha particles, refer to the link:
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CH4 + 2O + CO2 + 2 H2O
If 9.65 mole of methane reacts with oxygen to produce carbon dioxide and water, what mass of water is produced?
Answer:
347.4 (19.3 mole)
Explanation:
CH4 + 2O2 = CO2 + 2H2O
1(mole) - 9.65(mole)
2(mole) - x ⇒x = 9.65*2=19.3
m=n*M ⇒ m= 19.3*(1*2+16)= 19.3*18=347.4(g)
Can someone tell me if these are right? I am supposed to be decoding this for my escape room but it seems to be wrong.
Answer:
Q1 is A.
Q2 is right
Q3 is D.....I dont
really know about this one
Q4 is right
Where do animals obtain their chemical energy? I WILL MARK BRAINLEST HELP ASAP!!!
from plants only
from plants and animals
from animals only
directly from solar energy
Answer:
from plants and animals.
what is the main function of photosynthesis
Answer:
to provide food to the plant also known as glucose
What effect does pollution have on condensation? A There are more particles in the air for water vapor to cluster around. B Areas with more pollution have more clouds and rain. C Pollution creates more ground level clouds. D It is harder for the sun to warm up the water vapor.
Answer:
A There are more particles in the air for water vapor to cluster around.
Explanation:
As the condensation process takes place more particles are added to the atmosphere for water vapour and condensation further leads to the build-up of clouds. If the sky is polluted with pollutants the condensation can raise the level of pollution by blocking the rays of the sun from reaching the ground. This affects the visibility of most of the cities.Santee Cooper is stocking lakes Marion and Moultrie with 109,000 sterile grass carp. The grass carp, which eat hydrilla (Invasive species), are the most effective and least Intrusive means to control the weed. What type of control are they using?
A Invasive
B biological
C.chemical
D physical
Answer:
biological
Explanation:
i took the test and got it right
