Answer:
C3H8
Explanation:
1 1.5mol
2 0.75mol
3 0.667mol
Questions 1.2
1 16.7mol
2 8.3×10−3mol
Questions 1.3
1 9
2 11
3 12
4 24
5 22
Questions 1.4
1 a) 151.9
b) 162.1
c) 60.0
d) 132.1
e) 388.8
2 a) 0.5mol
b) 2.5mol
c) 0.6mol
d) 2.0mol
e) 0.38mol
3 a) 180.6g
b) 44.46g
Questions 1.5
1 Mr = 277.9 moles of oxygen = 11
2 Mr = 474.3 moles of oxygen = 20
Questions 1.6
1 Cu2S
2 C3H8
3 CaFe2O4
Questions 1.7
1 a) 2H2 + O2 → 2H2O
b) I2 + 3Cl2 → 2ICl3
c) NaOH + Al(OH)3 → NaAlO2 + 2H2O
d) 2H2S + SO2 → 3S + 2H2O
e) 4NH3 + 3O2 → 2N2 + 6H2O
2 a) MgCO3 → MgO + CO2
b) Pb(s) + 2AgNO3(aq) → Pb(NO3)2(aq) + 2Ag(s)
c) Na2O(s) + H2O(l) → 2NaOH(aq)
d) 2FeCl2 + Cl2 → 2FeCl3
e) Fe2(SO4)3 + 6NaOH → 2Fe(OH)3 + 3Na2SO4
Questions 1.8
1 17.0g
2 60.7g
3 51.1%
Questions 1.9
1 1.2dm3
2 Volume of SO2 = 50cm3; mass of sulfur = 0.20g
Questions 1.10
1 a) 2.67moldm−3
b) 0.025moldm−3
c) 0.833moldm−3
2 a) 0.75mol
b) 0.044mol
c) 0.010mol
What is a behavior that is influenced by the surrounding environment called? (2 points)
a
Discovered
b
Inherited
c
Learned
d
Natural
Answer:
the answer is c
Explanation:
Answer:
D. NaturalExplanation:
Because it says, influenced by the surrounding environment called? so its natural
When heated, the alcohol inside a thermometer
expands
O contracts
Answer:
it expands
Explanation:
this is because when it get warmer it runs out of room and makes it got up the tube.
what is endothermic reaction
Answer:
Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products.
Answer:
Chemical reactions that absorb (or use) energy overall are called endothermic. In endothermic reactions, more energy is absorbed when the bonds in the reactants are broken than is released when new bonds are formed in the products.
Which of the following shows motion? *
1.a boy watching television
2.a mother going to market
3.a dog barking at strangers
4.pillows on bed
Answer:
3
Explanation:
motion means movement, none of the others show movement
Answer:
a mother going to market
Explanation:
going is a motion
What does it mean if you have a metallic taste in your mouth.
Which chemical compound is added to natural gas to safely detect leaks in pipelines and appliances?.
Answer:
Mercaptan is the additive that is added to natural gas to make it easier to detect in case of a leak. The most important thing to know about mercaptan is that it stinks. Some people compare it to the smell of rotten eggs.
Explanation:
Is H2O a compound, mixture or element? Molecule, mixture, compound, element.
Answer:
Compound
Explanation:
This is because it made up of two elements that's is hydrogen and oxygen in the ratio of 2:1 respectively
Answer:
Compound
Explanation:
H2O isn't on the periodic table so it's not an element. H2O isn't a molecule because it's water. H2O isn't a mixture because it can't be seperated. So, it must be a copound.
What are the uses of Diamonds?
your own answer
please help
Answer:
Diamonds are very important in our daily lives ,so therefore it has many uses
1.They are used ad beauty products
2.They are used in automative industry
3.They are used in making windows
4.They are used as medicine
What is Thermal Energy?
What is anaerobic respiration explain in your own words pleaseeee and don’t answer for points because I will report you
Answer:
Breaking down of food substances without oxygen
Explanation:
The release of energy by breaking down food substances in the absence of oxygen
such as a cow, has offspring, what characteristic will the offspring most likely inherit?
A Body shape and behavoir
B Hair or fur and number of legs
C Number of legs and scales
D Skin color and body segments
A reaction vessel at 1215k contains a mixture of SO2( P = 2. 98 bar) and O2(P = 1. 18 bar). When a catalyst is added, this reaction takes place: 2SO2(g)+O2(g)⇌2SO3(g) At equilibrium the total pressure is 3. 80 bar.
Find the value of k?
This problem is providing the equilibrium reaction whereby SO3 is produced and asks for the value of the equilibrium constant. After the calculations, the answer turns out to be 0.124.
Chemical equilibrium.In chemistry, when a chemical reaction attempts to go to completion, it might experience a limitation known as equilibrium; a condition where it is not able to proceed any further.
In such a way, for the given reaction:
[tex]2SO_2(g)+O_2(g)\rightleftharpoons 2SO_3(g)[/tex]
We can write the equilibrium expression as:
[tex]K=\frac{p_{SO_3}^2}{p_{SO_2}^2p_{O_2}}[/tex]
Hence, given the total pressure at equilibrium, we can add the pressures of all the species at equilibrium including the reaction extent, x:
[tex]P_{eq}=p_{SO_3}+p_{SO_2}+p_{O_2}\\\\3.80=(2x)+(2.98-2x)+(1.18-x)[/tex]
Thus, we solve for x to obtain:
[tex]3.80-2.98-1.18=2x-2x-x\\\\-0.36=-x\\\\x=0.36bar[/tex]
Hence, we plug it in into the equilibrium expression to obtain the equilibrium constant as follows:
[tex]K=\frac{(2x)^2}{(2.98-2x)^2(1.18-x)}\\\\K=\frac{(2*0.36)^2}{(2.98-2*0.36)^2(1.18-0.36)}\\\\K=0.124[/tex]
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Using the phase diagram for H20, which of the following correctly describes
water at 100°C and 1 atm pressure?
O A. Gas
B. At the melting point
C. At the boiling point
D. Liquid
Answer:
i think it is c. At the boiling point
Explanation:
hope this helps
Answer:
PROOF ITS MELTING POINT
Explanation:
What is the double-stranded nucleic acid?
Answer:
Double-stranded DNA consists of two polynucleotide chains whose nitrogenous bases are connected by hydrogen bonds. Within this arrangement, each strand mirrors the other as a result of the anti-parallel orientation of the sugar-phosphate backbones, as well as the complementary nature of the A-T and C-G base pairing.
Explanation:
What is the main source of energy for the water cycle.
Answer:
The main source of energy is the sun. The sun has a big part in the water cycle because it turns the water into water vapor. This cause the water cycle to start over again once it rains. Therefore, making the sun ne of the biggest parts in the water cycle.
Waste dairy whey is used to grow Kluyveromyces fragilis yeast in a continuous culture system operated at 30C and 1 atm pressure. Medium containing 4% w/w lactose (C12H22O11) and 0. 15% w/w NH3 flows into a specially designed aerated bioreactor at a rate of 200 kg h21. The reactor is compartmentalised to facilitate gravity settling of the yeast; a suspension containing concentrated cells is drawn off continuously from the bottom of the reactor at a rate of 40 kg h21, while an aqueous waste stream containing 0. 5 kg cells per 100 kg leaves from the top. All of the lactose provided is utilised by the culture. The biomass yield from lactose is known from preliminary experiments to be 0. 25 g g21. The composition of the K. Fragilis biomass is determined by elemental analysis to be CH1. 63O0. 54N0. 16 1 7. 5% ash.
Required:
a. What is the RQ for this culture?
b. It is proposed to supply the reactor with air at a maximum flow rate of 305 litres min21. Will this provide sufficient oxygen? If not, what minimum level of oxygen enrichment of the air is needed if the total gas flow rate is 305 litres min21?
c. What is the concentration of residual NH3 in the aqueous waste stream?
d. What is the concentration of cells in the cell concentrate?
explain newtons 2nd law of motion by using the example of a rollercoaster
Answer:
When the cart gets to down-hill drop, for a moment it is at rest, until gravity (a force) acts upon the cart and causes it to accelerate downward.
Explanation:
Newton's second law says that when a constant force acts on a massive body, it causes it to accelerate, i.e., to change its velocity, at a constant rate. In the simplest case, a force applied to an object at rest causes it to accelerate in the direction of the force.
When copper metal is added to silver nitrate
in solution, silver metal and copper(II) nitrate
are produced. What mass of silver is produced
from 52 g of Cu?
Answer in units of g.
Step 1: Write the chemical equation:
2Cu + AgNO₃ → Cu(NO₃)₂ + Ag
Step 2: Calculate the moles of Cu:
n(Cu) = mass/Ar
n(Cu) = 52 / 63.546
n(Cu)= 0.818 mol
Step 3: Find the mole ratio between Cu an Ag and figure out the moles of Ag
Cu : Ag
2 : 1
0.818 : 0.818 / 2
0.818 : 0.409
Thus, n(Ag) = 0.409 mol
Step 4: Find the mass of Ag:
Mass of Ag = moles × Ar.
Mass = 0.409 × 107.8682
Mass = 44.11g
find the molarity of a solution containing 25.2g kCl in 752mL of water
Answer:
1. Find the number of moles of solute dissolved in solution,
2. Find the volume of solution in liters, and.
3. Divide moles solute by liters solution.
Hope this helps you solve the problem.
What is limiting reagent?
:~}
In a chemical reaction, reactant which is present in the lesser amount gets consumed after sometime and after that no further reaction takes place whatever be the amount of the other reactant present.
Explanation:
~A limiting reagent is the reactant that gets consumed early in a chemical reaction
What is a Limiting reagent ?During a chemical reaction the reactant that gets consumed early in the reaction limits the quantity of product which will be produced in the chemical reaction. therefore the reactant that gets consumed early in a chemical reaction is a limiting reagent.
Hence we can conlcude that A limiting reagent is the reactan that gets consumed early in a chemical reaction.
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#SPJ5
Vinegar contains 5% acetic acid. The remaining 95% is just water. If you used 10 grams of vinegar, how many
grams of acetic acid did you use? What is 5% of 10 grams?
Answer: 0.5 grams of acetic acid
Explanation:
Just find 5 percent of 10 grams
5/100x10=0.5
Write a paragraph (5-7 sentences) describing pH and conductivity.
Answer:
pH is a measure of hydrogen ion concentration, a measure of the acidity or alkalinity of a solution. The pH scale usually ranges from 0 to 14. Aqueous solutions at 25°C with a pH less than 7 are acidic, while those with a pH greater than 7 are basic or alkaline. A pH level of 7.0 at 25°C is defined as "neutral" because the concentration of H3O+ equals the concentration of OH− in pure water. On the other hand, electrical conductivity is a non-specific measurement of the concentration of both positively and negatively charged ions within a sample. So the short answer to the question is as follows, the presence of any hydrogen ions present in a substance will impact the pH level and most probably influence conductivity levels. However, hydrogen ions make up only a small part of the ion concentration measured by a conductivity meter.
Weathering and Erosion Unit Test
Explain how crustal deformation builds landforms.
O
When two tectonic plates start to push into each other they can rise up and build mountains, or sink under
and create deep valleys.
O When wind and rain slowly wear away rock, they leave behind new looking landforms.
If
o
When two tectonic plates slide away from each other the inner liquid layer of the mantle comes to the
surface as lava and creates new islands.
It
When sediments are laid down over vast areas the forces involved create rock over a very long period of
time.
It
HELP ME ASAPPP PLEASEEE
Crustal deformation builds landforms when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create valleys.
How crustal deformation builds landforms?Tectonic pressure in a crust can cause folding. Folding can end up with the formation of valleys and mountains so we can conclude that when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create deep valleys.
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What type of compound is HCI?
A. Ionic
B. Molecular
C. Acid
D. Hydrate
Substance Specific Heat Capacity J/Kgo C Ammonia 4700 Ethanol 2440 Gasoline 2220 Water 4186 A liquid has a mass of 18. 39g. If 655J of heat are required to change the temperature from 32. 8oC to 18. 2oC, what is the identity of the liquid? A) ammonia B) ethanol C) gasoline D) water
Answer:
B) ethanol
Explanation:
that is the answer I got it in my test
What kind of energy can be transferred?
____energy
Answer:
I think it's thermal energy. c:
Answer
Thermal energy transfers occur in three ways: conduction, convection, and radiation. Conduction is when thermal energy is transferred between molecules in contact with one another.
Thermal is the answer.
how many moles of hydrogen are in 4.0 moles of H2SO4
Answer:
1 grams H2SO4 is equal to 0.010195916576195 mole.
Explanation:
List two additional questions to address climate change.
Answer: How is climate change affecting the ocean?
Is it climate change, global warming, or global climate crisis?
How many moles does Phosphoric Acid have?
Answer:
0.010204583427424 per 1 gram.
0.01 moles Phosphoric Acid ⇒ 1.0000000000000153 gram(1 gram of acid)
I hope this answers your question! Have a great day.
Is boiling a chemical reaction?
Answer:
yes, because water is reacting with air and heat and creating a boiling effect.
Explanation: kracken doge
Answer: Freezing and boiling are considered to be examples of chemical reactions. This depends on their conception of substance. If students regard ice as a different substance from liquid water they are likely to classify the melting of ice as a chemical change.
Explanation:
Boiling water, boiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid water (H2O). No, boiling water is NOT a chemical reaction, but it is a physical change.