The sun contained 99% of the available matter and the rest matter formed smaller clumps inside the spinning disk. These clumps gained enough mass which lead to their gravity shaping them into spheres becoming planets.
What are planets?A planet can be described as a large, rounded astronomical body that is neither a star nor its remnant. The theory of planet formation is the nebular hypothesis, which tells that an interstellar cloud collapses out of a nebula to generate a young protostar orbited by a protoplanetary disk.
The planet grows in this disk by the accumulation of material driven by gravity and this process is known as accretion. Our solar system has at least eight planets that rotate around an axis tilted with respect to its orbital pole.
All planets possess an atmosphere, although that of Mercury is tenuous. The Solar System planets create magnetic fields apart from Venus and Mars, and all planets except Venus and Mercury have natural satellites.
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Which of the following is the best explanation of why an ionic compound formula is a ratio of atoms
ООО
The sharing of electrons is always in a simple ratio
The number of atoms in an ionic compound change... there can be several possible combinations
When ions form they are attracted to each other and "cxmp" together to form a crystal
lonic compounds conduct electricity when dissolved in water.
The colder parts of the surface of Pluto have a temperature of –382°F. What is this temperature in Celsius?
Two students come up with an idea they think will save time: We just used the fast titrations. You can stop the video when the solution turns pink. We know that when the solution turns pink, the titration is complete, so we just read the volume from the burette as soon as it turns pink. This is faster than going through all the shorter videos and works just as well. Is this method just as accurate as using the slow titrations
Answer:
Yes.
Explanation:
Yes, this method is accurate just as the slow titration because in both type of titrations we want to measure the point at which the indicator change the colour of the solution. Both fast and slow titrations are the same in their function i.e. both tell us the point or the amount at which the indicator change the colour of the solution so we can conclude from this discussion that fast titration gives the same result just as the slow titration.
what is the most important part of solution preparation
Answer:
id k exactly what your asking
Explanation:
Scientists classify organisms into three domains and six kingdoms. In which
kingdom are yeasts classified and why?
A Plantae, because they are eukaryotic.
B Protista, because they are prokaryotic.
Fungi, because they are heterotrophic.
Animalia, because they are autotrophic.
Answer:
c is correct option
according to the question.
Scientists classify organisms into three domains and six kingdoms. In Fungi kingdom are yeasts classified because they are heterotrophic. Therefore, option C is correct.
What do you mean by the term heterotrophic ?An organism is referred to be a heterotroph if it is unable to manufacture food on its own and must obtain it from other sources of organic carbon, primarily plant or animal materials.
All fungi are heterotrophic, which means they draw their energy from other living things.
Since they share some traits with fungi, such as the presence of chitin in their cell walls, extracellular digestion, saprophytic feeding, asexual reproduction by budding, and the ability to store food as glycogen, yeast cells are categorised as fungi.
Thus, option C is correct.
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Which expression represents the concentration of OH– in solution?
a. 10–14 / [H3O+]
b. [OH–] / 10–14
c. 10–14 – [H3O+]
d. 10–14 x [H3O+]
N 2H 4 + H202 N2 + H 20
Answer:
N2 + H20
Explanation:
chemical equation balancer
What is the hydronium ion concentration of a solution whose pH is 4.12?
a. 5.1 x 10–6 M
b. 7.6 x 10–5 M
c. 6.4 x 10–5 M
d. 4.4 x 10–8 M
pls help with 1 question (15 ponts)
What happens in the circulatory system?
When copper is heated with an excess of sulfur, copper(l) sulfide is
formed. In a given experiment, 0.0970 moles of copper was heated
with excess sulfur to yield 5.59 g copper(1) sulfide. What is the
percent yield?
Answer:
72.4%
Explanation:
Step 1: Write the balanced equation
2 Cu + S ⇒ Cu₂S
Step 2: Calculate the theoretical yield, in moles, from 0.0970 moles of Cu
The molar ratio of Cu to Cu₂S is 2:1.
0.0970 mol Cu × 1 mol Cu₂S/2 mol Cu = 0.0485 mol Cu₂S
Step 3, Convert the theoretical yield to mass
The molar mass of Cu₂S is 159.16 g/mol.
0.0485 mol × 159.16 g/mol = 7.72 g
Step 4: Calculate the percent yield
We will use the following expression.
%yield = experimental yield/theoretical yield × 100%
%yield = 5.59 g/7.72 g × 100% = 72.4%
Was rays birthday lit
Answer:
Yes.
Explanation:
Yes.
Answer:10-1707
Explanation:
What volume (in mL) of concentrated HCl (12 M) is needed to make 1500 mL of a 3.5 M solution?
Answer:
437.5 mL
Explanation:
Concentration (c) = Moles (n) / Volume of solution (liters)
C = n / V
rearrange the formula to find out how many moles you need in the final solution.
n (moles) = concentration (c) x Volume (V) ( in liters)
Convert your mL into L. 1500mL is 1.5L
n = 3.5 moles/liter x 1.5 liters (the liters cancel each other out)
n = 5.25 moles
Now use the same formula to calculate the volume you need to make the final solution based on the concentration of the original.
c = n/V or V = n / c
V = 5.25 moles / 12 moles/liter here the moles cancel out
V = 0.4375 L
convert back to mL
V = 437.5 mL
A chemical change creates a new
A-atom
B-element
C-substance
Answer:
c substance
Explanation:
Matter is never destroyed or created in chemical reactions. The particles of one substance are rearranged to form a new substance. The same number of particles that exist before the reaction exist after the reaction.
2. A chemical's flash point is the
Theses are all the points
I have left
Would you rather Go to jail for the rest of your life or go to prison for the rest of you life?
Answer:
I honestly don't know but I hope you get more points! ;D
Explanation:
Which statement is completely accurate? O Atoms of the same element always have different numbers of neutrons. O Atoms of the same element can have neutrons but exist without protons. O Atoms of the same element always have different atomic weights. O Atoms of the same element can have different numbers of neutrons.
Answer: last one is right
Explanation: atoms of same element have always same number of protons but may have several isotopes which have different number of neutrons.
QUESTION TWO
2.1
Discuss the process of the scientific method and clarify what is meant
by the science process skills.
(5)
Answer: The scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century. It involves careful observation, applying rigorous skepticism about what is observed, given that cognitive assumptions can distort how one interprets the observation.
Explanation:
Hope this helps. :)
Which expression represents the concentration of OH– in solution?
a. 10–14 / [H3O+]
b. [OH–] / 10–14
c. 10–14 – [H3O+]
d. 10–14 x [H3O+]
Answer:
c. 10–14[H3O+]
Explanation:
On a calculator, calculate 10-8.34, or "inverse" log ( - 8.34). Example: What is the pOH of a solution that has a hydroxide ion concentration of 4.82 x 10-5 M? The hydroxide ion concentration can be found from the pOH by the reverse mathematical operation employed to find the pOH.
In the balanced equation-aPb(NO3)2(s)heatb PbO(s)+ c NO2(g)+ dO2(g); the values of a,b,c, d are respectively
Answer:
The balance reaction is
2Pb(NO3)2 ----》4NO2+2PbO+O2
hence the value of a,b,c,d are 2,4,2,1 respectively!
Chemistry, 50 points!!! Will also mark brainliest if you answer everything
Answer:
1. 2Al + Cl2 = Al2Cl2
2 TiCl4 + 2Na = Ti + 2NaCl2
3. H2O2 = H2O + O2
4. Na2S + 2HCl = H2S + 2NaCl
5. Mg(OH)2 + 2HCl = MgCl2 + 2H2O
1. 3O2 = 2O3
How are nuclear fission and nuclear fusion similar?
A. Both processes combine smaller nuclei into larger nuclei.
B. Both processes convert mass into energy.
C. Both processes are used to produce electrical power.
D. Both processes occur in stars.
Answer:
C. Both processes convert mass into energy.
Describe Muller's Ratchet.
Answer:
Muller's ratchet is a paradigmatic model in population genetics which describes the fixation of a deleterious mutation in a population of finite size due to an unfortunate stochastic fluctuation.
Explanation:
Answer:
Muller's ratchet is a paradigmatic model in population genetics which describes the fixation of a deleterious mutation in a population of finite size due to an unfortunate stochastic fluctuation.
Explanation:
This is the correct answer took a test and got this correct thank you to the original user above.
The water treatment plant adds chlorine gas to the municipal water supply to
control microorganisms. If a technician adds Cl2 at a rate of 1 mg per liter of water,
what is the molar concentration of chlorine in the drinking water?
Answer:
1 × 10⁻⁵ M
Explanation:
Step 1: Given data
Concentration of chlorine: 1 mg/LStep 2: Convert the concentration of chlorine from mg/L to g/L
We will use the conversion factor 1 g = 10³ mg.
1 mg/L × 1 g/10³ mg = 1 × 10⁻³ g/L
Step 3: Convert the concentration of chlorine from g/L to mol/L (molar)
We will use the molar mass of chlorine: 70.91 g/mol.
1 × 10⁻³ g/L × 1 mol/70.91 g = 1 × 10⁻⁵ mol/L = 1 × 10⁻⁵ M
HELP! 20 mL of hydrogen measured at 15°C is heated to 35°C.
What is the new volume at the same pressure?
Answer:either 20.38 or 21.38
Explanation:
i clicked on 10.38 and it was wrong, i also clicked on 22.38 and it was wrong lol
Answer: 21.38 mL
Explanation: i just answered it on ck-12
What is the volume of 40.0 grams of argon gas at STP ?
Answer:
24.9 L Ar
General Formulas and Concepts:
Atomic Structure
Reading a Periodic TableMolesSTP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 KAqueous Solutions
States of MatterStoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
[Given] 40.0 g Ar
[Solve] L Ar
Step 2: Identify Conversions
[PT] Molar Mass of Ar - 39.95 g/mol
[STP] 22.4 L = 1 mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 40.0 \ g \ Ar(\frac{1 \ mol \ Ar}{39.95 \ g \ Ar})(\frac{22.4 \ L \ Ar}{1 \ mol \ Ar})[/tex][DA] Divide/Multiply [Cancel out units]: [tex]\displaystyle 24.9235 \ L \ Ar[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
24.9235 L Ar ≈ 24.9 L Ar
Using the balanced equation N2+O2=2NO, how many grams of NO can be produced when 25.0 grams of N react?
Answer:
[tex]53.55gNO[/tex]
Explanation:
Hello there!
In this case, according to the given chemical reaction, it is possible for us to calculate the produced grams of nitrogen monoxide by starting with 25.0 g of nitrogen via their 1:2 mole ratio and the molar masses of 30.1 g/mol and 28.02 g/mol, respectively and by some stoichiometry:
[tex]=25.0gN_2*\frac{1molN_2}{28.02gN_2}*\frac{2molNO}{1molN_2}*\frac{30.01 gNO}{1molNO}\\\\=53.55gNO[/tex]
Best regards!
Sulfur and fluorine react to form sulfur hexafluoride according to the reaction shown here. How many mol of F2 are required to react completely with 2.15 mol of S?
S(s)+3F2(g)→SF6(g)
A. 12.9 molF2
B. 6.45 molF2
C. 0.72 molF2
D. 2.15 molF2
6.45 mole of fluorine are required to completely react with 2.15 mole of sulfur according to the stoichiometry of the reaction .
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
In the given example the balanced chemical reaction is as follows:
S +3 F₂ [tex]\rightarrow[/tex] SF₆
According to the reaction, 1 mole of sulfur reacts with 3 moles of fluorine to yield 1 mole of sulfur hexafluoride.
∴2.15 mole of sulfur requires 2.15×3=6.45 mole of fluorine.
Hence, 6.45 mole of fluorine are required to completely react with 2.15 mole of sulfur.
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A student is heating a crystal of alum to
determine the hydrate formula. If she removes
it from the heat before all the water has been
removed, what will happen to the calculated
hydrate formula?
A. It will not be affected by the error.
B. The mole ratio will indicate less water than was
actually present.
C. The mole ratio Will indicate less alum than was
actually present.
How many moles of carbon dioxide are produced when 0.25 mole of butane is consumed?
Answer:
1
Explanation:
Let's write the equation first:
[tex]C_{4}H_{10} + \frac{13}{2} O_{2} -> 4 CO_2 +5 H_{2}O[/tex]
So 1 mole of butane reacts to give 4moles of Carbon diOxide.
thus , 0.25 mole of butane will react to give = 4 * 0.25= 1 mole Carbon diOxide
Ozone is three oxygen atoms bonded together. It can sometimes be smelled in the air after a thunderstorm. the smell is a result of
Ozone gas can be smelled in the air after a thunderstorm as a result of reactions between oxides of nitrogen and volatile organic compounds.
How ozone gas be smelled?Ozone gas can be produced due to chemical reactions between oxides of nitrogen and volatile organic compounds. This reaction occurs when pollututed gas is emitted from vehicles react and other activities with each other in the presence of sunlight.
So we can canclude that Ozone gas can be smelled in the air after a thunderstorm as a result of reactions between oxides of nitrogen and volatile organic co
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