Answer:
10 atm.
Explanation:
Using the combined gas law equation as follows;
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (L)
V2 = final volume (L)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the information provided in this question,
P1 = 5 atm
P2 = ?
V1 = 4L
V2 = 2L
T1 = 25°C = 25 + 273 = 298K
T2 = 25°C = 298K
Using P1V1/T1 = P2V2/T2
5 × 4/298 = P2 × 2/298
20/298 = 2P2/298
Cross multiply
298 × 20 = 298 × 2P2
5960 = 596P2
P2 = 5960 ÷ 596
P2 = 10 atm.
CaC2 + 2H2O ⟶ C2H2 + Ca(OH)2
If 32.0g CaC2 are used in this reaction, how many moles of calcium hydroxide are produced?
0.499 mol
Explanation: M(CaC2) = 64.1 g/mol, n= m/M = 32.0 g/ 64.1 g/ mol= 0.499 mol
Amount of Calcium hydroxide Is same
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.
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What type of reaction is: br2 + nal2 ---> nabr + l2
Answer: its a single replacement reaction
Identify at least four limiting factors in the local ecosystem and their impact on native populations.
4 limiting factors could be water, space, pollution, and access to mates, could all be factors in limiting the native population. Water, could be affected by pollution, and this would remove water, which means that no living things would be able to survive, or at the best be hindered in its growth. Space could be removed by deforestation, or simple water rising, and this could kill off the population, thus removing mates for the population. (hope this helped, if it did, please consider marking brainiest)
The availability of food, water, shelter and diseases are the four limiting factors in the local ecosystem and their impact on native populations.
What are the limiting factors?The limiting factors such as availability of food, water, shelter and diseases can change animal and plant populations because these factors has a direct impact on the organisms and the organisms is depend on these factors for their survival.
So we can conclude that availability of food, water, shelter and diseases are the four limiting factors in the local ecosystem and their impact on native populations.
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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
Organisms are classified into different kingdoms based on?...
Answer:
Food and cell type
Explanation:
Kingdoms are by far the most basic legal structure for living objects. Living objects are classified into realms depending on how they consume food, the kinds of cells that produce their bodies, and the total type of tissue in their bodies.
in which way are sugars usually transported throut a pine tree
Which method can be used to calculate the percentage composition of a
compound?
I uploaded the answer to a file hosting. Here's link:
tinyurl.com/wpazsebu
PLSSSS HELP
this is science
Answer:
The answer is CExplanation:
when a car begins to slow down the speed that it was going will decrease. Which means that it is an example of deceleration.
Answer:
The answers would be : ( a car approaching a red light )
15 N .
F= m.a ----> 15 = 5.3
Which ones are alcohols?
1. Using the structural formulas for ammonia (NH3 on the left) and hexane (C6H14 on the right) below which statement explains what will happen when ammonia and hexane are mixed?
A. Hexane will dissolve with ammonia if you stir them together for 10 minutes
B. Ammonia and hexane will not dissolve because one molecule is polar and the other is non polar.
C. Ammonia and hexane will dissolve together
D. Ammonia and hexane will not dissolve because one molecule is ionic and the other is non polar
2. If you add water to 750.0 mL of a 2.800 M KCl solution, and its molarity changes to 1.500 M, what will the new volume be?
1200 mL
401.0 mL
1400 mL
800.0 mL
Answer:
1. B. Ammonia and hexane will not dissolve because one molecule is polar and the other is non polar.
2. 1400 mL
Explanation:
In chemistry, like dissolve like! Ammonia is a polar molecule having a significant dipole moment owing to its three N-H bonds. On the other hand, hexane is a purely non-polar hydrocarbon hence the two substances can never dissolve in each other.
From the dilution formula;
C1V1=C2V2
C1= Initial concentration of the solution
V1 = Initial volume of the solution
C2 = Final concentration of the solution
V2= Final volume of the solution
2.8 M * 750.0 mL = 1.5 M * V2
V2 = 2.8 M * 750.0 mL/1.5 M
V2 = 1400 mL
Which, if any, of the following is named incorrectly? *
A) FeSO4; iron (II) sulfate
B) Fe(OH)2; iron (III) hydroxide
C) K3P; potassium phosphide
D) Sn3(PO4)4; tin (IV) phosphate
Answer:
I think it is either a or b
Explanation:
c or d has the correct names and Roman numerals.
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:
I need help with this for an assignment
Scientists group similar organisms together through a process called …..
Identification
Identification
Organization
Organization
Estimation
Estimation
Classification
Answer:
i think it's Organization
Explanation:
The reason being is because they obviously said 'humans' so that's why i think it is Organization
Scientists group similar organisms together through the process called classification. Each similar groups is classified into different organizations.
What is biological classification?The arrangement of species into groups according to significant similarities is known as biological classification. Then, these groups are broken down into more focused, smaller subgroups. Additional details on the species that make up each subgroup are provided.
Organisms are categorized by scientists to make them simpler to research and to facilitate information sharing. Before biologists properly comprehended genetics, the study of biological classification was conducted.
At first, scientists simply categorized creatures based on their outward appearance. Later, as genetic research developed, classification of organisms was based on the genetic and evolutionary links between them.
Therefore, scientists classify each organisms to suitable organizations.
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Can someone plz help me with this one problem plzzzzz I’m being timed!!!
Answer:
answer : the penguins do
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
It’s Integrated Chemistry
Aluminum oxide reacts with hydrochloric acid to produce salt. What is the name of the salt produced?
Answer:
IT IS CHLORIDE!
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
Did anyone do this worksheet (science)
Ammonia, nh3, for fertilizer is made by causing hydrogen and nitrogen to react at high temperature and pressure. How many moles of ammonia can be made from 0.15 moles of nitrogen gas? _h2+_02 to _nh3
Answer:
[tex]0.30molNH_3[/tex]
Explanation:
Hello there!
In this case, since the reaction for the formation of ammonia is:
[tex]3H_2+N_2\rightarrow 2NH_3[/tex]
We can evidence the 1:2 mole ratio of nitrogen gas to ammonia; therefore, the appropriate stoichiometric setup for the calculation of the moles of the latter turns out to be:
[tex]0.15molN_2*\frac{2molNH_3}{1molN_2}[/tex]
And the result is:
[tex]0.30molNH_3[/tex]
Best regards!
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:
Using the rules of electron configurations is this a valid orbital diagram?
On the periodic table, calcium is in group 2. What is true about calcium?
Answer:
Explanation:
Calcium is all around us. The average human contains approximately 1kg of calcium, of which 99% is stored in our bones. It is the 5th most abundant element in the earth's crust, occurring widely as calcium carbonate which is more commonly known as limestone. It is also the fifth most abundant dissolved ion in seawater.
Why would the presence of oxygen bubbles be a good indicator of photosynthesis occurring?
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What is the main function of the part labeled Yin the model?
Answer:
The part labelled Y is the chloroplast and its main function is to produce food for the plant in the reactions of photosynthesis.
Explanation:
Plants are autotrophic organisms in that they are able to manufacture their own food. Plants are able to manufacture their own food due to the presence of the cell organelle known as the chloroplast. The plant chloroplast has its own DNA and can reproduce independently, from the rest of the cell. They can as well produce amino acids and lipids required for the chloroplast membrane.
Chloroplasts are green-colored membrane-bound organelles found within the plant cell. Their green color is due to the presence of the pigment, chlorophyll. Chlorophyll in the chloroplasts are responsible for absorbing light energy from sunlight and using this absorbed energy to make simple sugars (carbohydrates) from carbon (iv) oxide and water. This is the main function of the chloroplasts in plant cells.
Photosynthesis occurs in the chloroplasts in two reaction steps:
1. The light reaction - involves the splitting of e=water molecules using the energy of sunlight
2. The dark reactions - carbon (iv) oxide from the air is used to produce sugars.
If you are given 608 grams of calcium phosphate Ca3(PO4)2, how many moles would you have? *
Answer:
You would have 1.96 moles.
Explanation:
You are given 608 grams of calcium phosphate Ca₃(PO₄)₂.
Molar mass (M) is the amount of mass that a substance contains in one mole. This substance can be an element or a compound.
Since the molar mass of the compound Ca₃(PO₄)₂ is 310 g / mole, and taking into account the definition of molar mass, you can apply the following rule of three: if 310 grams of Ca₃(PO₄)₂ are contained in 1 mole, 608 grams of the compound in how many moles are present?
[tex]moles=\frac{608 grams* 1 mole}{310 grams}[/tex]
moles= 1.96
You would have 1.96 moles.
Pl help it’s for a grade
Answer:
A
Explanation:
kinetic energy of a body at rest = 0
If you have 12 atoms of hydrogen before a chemical reaction, how many atoms of hydrogen will be present
Answer:
12 atoms of hydrogen will be present in the product
Explanation:
12 atoms of hydrogen will be present in the product because the law of conservation of mass states that mass is neither created nor destroyed in chemical reactions.
The law of conservation states that the mass of the element remains the same during the course of the reaction.
The law of reaction conformed by the following:-
Mass of reactant Mass of productAccording to the question, the amount of hydrogen is 12 atoms in the reactant and the amount will remain the same at the end of the reaction, which is a product that is 12 atoms
Hence, the amount remains the same in the reaction that is 12 atoms
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