Answer: Its C
Explanation:
A balloon has a volume of 105 Lif the temperature is 20 °C. If the temperature is -55°C,
what will be the volume of the volume?
Answer:
78.12 L
Explanation:
Given that,
Initial volume, V₁ = 105 L
Initial temperature, T₁ = 20°C = 20+273 = 293 K
New temperature, T₂ = -55 °C = 218 K
We need to find the new volume of the balloon. The relation between the volume and the temperature is given by :
[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
Where
V₂ is the new volume
[tex]V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{105\times 218}{293}\\\\V_2=78.12\ L[/tex]
So, the new volume is 78.12 L.
AmbienTM is a sedative used in the treatment of insomnia. It was discovered in 1982 and brought to market in 1992 (it takes a long time for new drugs to undergo the extensive testing required to receive approval from the Food and Drug Administration). Identify the hybridization state and geometry of each carbon atom in the structure of this compound:
Answer:
sp3 - 1,2,13,16,18,19
sp2- 3,4,5,6,7,8,9,10,11,12,14,15,17
sp- 0
Explanation:
Hybridization is the idea that atomic orbitals fuse to form newly hybridized orbitals, which in turn, influences molecular geometry and bonding properties (Chemlibretexts).
Carbon atoms that are singly bonded are sp3 hybridized, carbon atoms that are doubly bonded are sp2 hybridized while carbon atoms that are triply bonded are sp hybridized.
Sp3 hybridized atoms have a tetrahedral geometry, sp2 hybridized atoms have a trigonal planar geometry while an sp hybridized atom has a linear geometry.
The hybridization state of each atom in the compound has been shown in the answer section.
In a Sodium ion 11Na +1
atomic number =11
mass number =23 ,
the number of electrons =
Answer:
11 electrons
Explanation:
The number of electrons is the same as the number of protona in a ATOM.
They will most likely be different in a ion, simple bond or a convalent bond.
Pick the answer that correctly spells a layer of the atmosphere.
A. Mesosphere
B. Thermsphere
C. Mezosphere
D. Tropshere
E. Thermoshere
The correct answer is option A; Mesosphere
The mesosphere is defined as the part atmosphere found above the stratosphere but below the thermosphere.
In this layer of the atmosphere, temperature decreases with height. It covers about 50 to 85 km above the earth.
Mesosphere is the only layer of the atmosphere that was correctly spelt among the options.
Learn more: https://brainly.com/question/12117482
supposing on a hypothetical garden 43 identical trees contains a total of 19565 leaves. if each branch on a given tree consist of 35 leaves how many branches does each tree have?
Answer:
13 branches/tree
Explanation:
Step 1: Given data
Total number of trees (t): 43 treesTotal number of leaves (l): 19565 leavesNumber of leaves per branch (l/b): 35 leaves/branchStep 2: Calculate the total number of branches (b)
We will use the following expression.
b = l × b/l
b = 19565 leaves × 1 branch/35 leaves = 559 branch
Step 3: Calculate the number of branches per tree (b/t)
We will divide the total number of branches by the total number of trees.
559 branches/43 trees = 13 branches/tree
What are the two most abundant chemicals in air?
Answer:
The most abundant chemical/gas is Nitrogen, which makes up about 78% and Oxygen at second place with approximately 21%
Answer:
Nitrogen and Oxygen because about 70% of air is nitrogen and around 20% of air is Oxygen.
Hope this helps!
what mass of sodium hydroxide is needed to neutralise 24.5kg of sulfuric acid
H2SO4 + N2 = 2NH3
Answer:
23.92 g
Explanation:
Molar mass of H2SO4 = (2×1)+32+(16×4)= 2+32+48= 82g/mol
H2SO4 + 2NaOH ---> Na2SO4 + 2H2O
I mole of H2SO4 = 2 moles of NaOH
24.5/82 = 24.5/82 × 2
= 0.598 moles of NaOH will neutralize
Mass= mole× molar mass
Molar mass of NaOH= 23+16+1 = 40g/mol
Mass= 0.598 × 40 = 23.92g of NaOH
Answer:
20g
Explanation:
First of all, you have got your formula wrong. It should be [tex]H_{2}SO_{4} + 2NaOH = Na_{2}SO_{4} + 2H_{2}O[/tex].
Start by finding the Relative Formula Mass for sulfuric acid. [tex]H_{2}SO_{4}[/tex] is equal to (2x1)+32+(16x4)=98. You then calculate Mols by doing [tex]Mols=\frac{Mass}{Relative Formula Mass}[/tex]. So, [tex]\frac{24.5}{98} = 0.25[/tex], so the Mols of Sulfuric Acid is 0.25.
The Mol ratio of Sulfuric Acid to Sodium Hydroxide is 1:2, so 0.25:0.5.
Now, you have to find the Relative Formula Mass of Sodium Hydroxide, or [tex]NaOH[/tex]. 23+16+1=40. Finally, multiply 0.5 by 40, and you'll find that the maximum mass is 20g.
What do black holes look like ?
Astronomy class.
What is the hydrogen ion concentration in molarity if the hydroxide ion concentration is 7.609 10-13 ?
[H+][OH-] = 10-14
pH = -log[H+]
[H] = 10pH
Answer: The hydrogen ion concentration in molarity is 0.013
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pOH is calculated by taking negative logarithm of hydroxide ion concentration and pH is calculated by taking negative logarithm of hydrogen ion concentration
Putting in the values:
[tex]pOH=-\log[7.609\times 10^{-13}][/tex]
[tex]pOH=12.1[/tex]
Now , [tex]pH+pOH=14[/tex]
[tex]pH=14-12.1=1.9[/tex]
[tex]pH=-\log [H^+][/tex]
[tex][H^+]=0.013M[/tex]
The hydrogen ion concentration in molarity is 0.013
Question
In Woodward's 1952 synthesis of cholesterol, an elimination reaction was used to remove the C20 alcohol
substituent as shown below. The transformation is performed with acetic acid (hint: as opposed to a strong
base). Would you classify this as an E1 or E2 elimination?
Ola.E2
O b, E1
Explain what you discovered from the Simulation about why food coloring spreads faster in warmer water.
Answer:
the water molecules have more energy and are moving faster than the molecules of cold water. This makes it easier for the dye to get mixed throughout the hot water.
Explanation:
Answer:
Because particles moves more by kinetic energy and diffusion will spread with the particles
Explanation:
the eye is connected to the brain by nerves.
A. True
B. False
the answer is A..which is true
Why Is the atomic theory a theory and not a law?
Answer:
Atomic theory is the scientific theory that matter is composed of particles called atoms. Atomic theory traces its origins to an ancient philosophical tradition known as atomism. ... An atom is now defined as the basic particle that composes a chemical element.
Explanation:
Hope i helped
uses of carbon dioxide.
Answer:
hello can you follow me
Explanation:
used in fire extinction, blasting rubber, foaming rubber and plastic
A sample of aluminum, which has a specific heat capacity of 0.897·J·g−1°C^−1 , is put into a calorimeter (see sketch at right) that contains 300.0g of water. The aluminum sample starts off at 94.5°C and the temperature of the water starts off at 21.0°C .When the temperature of the water stops changing it's 23.8°C .The pressure remains constant at 1atm .Calculate the mass of the aluminum sample.
Answer: The mass of aluminium sample is 55.4 gram
Explanation:
[tex]Q_{absorbed}=Q_{released}[/tex]
As we know that,
[tex]Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})[/tex]
[tex]m_1\times c\times (T_{final}-T_1)=-[m_2\times c\times (T_{final}-T_2)][/tex]
where,
[tex]m_1[/tex] = mass of aluminium = ?
[tex]m_2[/tex] = mass of water = 300.0 g
[tex]T_{final}[/tex] = final temperature = [tex]23.8^0C[/tex]
[tex]T_1[/tex] = temperature of aluminium = [tex]94.5^oC[/tex]
[tex]T_2[/tex] = temperature of water = [tex]21.0^oC[/tex]
[tex]c_1[/tex] = specific heat of aluminium = [tex]0.897J/g^0C[/tex]
[tex]c_2[/tex] = specific heat of water = [tex]4.184J/g^0C[/tex]
Now put all the given values in equation (1), we get
[tex]-[m_1\times c_1\times (T_{final}-T_1)]=[m_2\times c_2\times (T_{final}-T_2)][/tex]
[tex]-[m_1\times 0.897\times (23.8-94.5)^0C]=[300.0g\times 4.184\times (23.8-21.0)][/tex]
[tex]m_1=55.4g[/tex]
Therefore, the mass of aluminium sample is 55.4 gram
5. 1.250 g of an alloy which is 90.00 % Ag and 10.00 % Cu is reacted with nitric acid producing AgNO3 and Cu(NO3)2 dissolved in solution. To the solution of the nitrate compounds is added a piece of copper wire that reacts only with the AgNO3 in solution to precipitate all of the silver, and produce additional Cu(NO3)2 (aq) . (The equation for this single-replacement reaction is: AgNO3(aq) + Cu(s) Cu(NO3)2(aq) + 2 Ag(s) ) The resulting solution containing all of the Cu(NO3)2 produced by the above processes is treated with excess zinc to precipitate the entire amount of copper (ll) ion present. ( The equation for this step is Cu(NO3)2(aq) + Zn(s) Zn(NO3)2(aq) + Cu(s) ) What mass of copper will be precipitated?
Answer:
See explanation
Explanation:
According to the question Copper is obtained from the original alloy and the copper wire used to displace the silver.
So,
Mass of the copper from the original alloy: (10.00 % * 1.250 g) = 0.125 g
We now need to obtain the mass of the copper from the wire, then we consider how much silver is precipitated:
Mass of silver in the alloy; 90.00 % * 1.250 g = 1.125 g
So,
Amount of silver precipitated =
1.125 / 107.9 = 0.01043 mole
From the reaction equation, it takes two moles of silver to displace one mole of copper.
Hence, the amount of copper from the wire is: 0.01043 / 2 = 0.005213 mol
And a mass of 0.005213(63.55) = 0.3313 g
Total mass of copper= 0.125 + 0.3313 = 0.456 g
What occurs in photosynthesis reaction
Answer and Explanation:
Photosynthesis reaction involves two reactants, carbon dioxide and water. These two reactants yield two products, namely, oxygen and glucose.
Which the following classes of compound is an example of acarbonyl compound
Answer:
b) carboxylic acid
Explanation:
You add 0.300 moles of an acid to enough water to get a total of 0.500 liters of solution. Your molar concentration is?
What is the pH of a 0.00200 M HCl solution?
Answer:
pH value of HCL = 2.69897
Explanation:
Given:
Concentration of HCL = 0.002 M
Find:
pH value of HCL
Computation:
pH value of HCL = - log(Concentration of HCL)
pH value of HCL = - log(0.002)
pH value of HCL = 2.69897
What's the mass in grams of 0.334 moles of sucrose (C12H22O11)?
Answer:
114.23g
Explanation:
Mass = xg
Mole = 0.334 mol
Molar mass of Sucrose
(C = 12, H = 1, O = 16)
C12H22O11
(12×12)+(1×22)+(16×11)
144 + 22 + 176
342g/mol
Mass = No of mole × Molar mass
Mass = 0.334 × 342
Mass = 114.228
Mass ≈ 114.23g
4. How many moles of Cl2, are obtained by the
decomposition of 6.3 moles of POCI3?
Answer:
6.3moles
Explanation:
The balanced chemical equation for the decomposition of phosphorus oxychloride (POCl3) is as follows:
POCl3 → POCl + Cl2
Based on the above decomposition reaction, it shows that;
1 mol of POCl3 will decompose to give 1 mole of Cl2
Hence, 6.3 moles of POCI3 will give 6.3 moles of Cl2.
i need help with this ASAP please i don’t understand this
Answer:
750 mmHg
Explanation:
From the question given above, the following data were obtained:
Partial pressure of CO₂ (Pₐ) = 250 mmHg
Partial pressure of N₂ (P₆) = 375 mmHg
Partial pressure of He (P꜀) = 125 mmHg
Pressure of the mixture (Pₜ) =?
The pressure of the mixture of the gases can be obtained as follow:
Pₜ = Pₐ + P₆ + P꜀
Pₜ = 250 + 375 + 125
Pₜ = 750 mmHg
Therefore, the pressure of the mixture of the gases is 750 mmHg
12.0 grams of sodium reacts with 5.00 grams of chlorine. What mass of sodium chloride could be produced?
Please show work if you can. I have the limiting reactant which is Cl2 (0.0705)
I think I did this part correctly but I don't know what to do after. How do you determine the amount of sodium chloride that can be produced?
Answer❣
The required speech is as follows :
_______________
"Whoever controls media, controls mind". A very hearty Good Morning to one and all present here ! Respected Principal Sir, worthy teachers and all my dear fellow mates. Today I Aurora, of class XYZ is standing before you in this frizzy winter to deliver a short speech on the topic 'How media influences public opinion'.
Dear friends, first of all I would like to ask you all a question, 'What do you think is our media for ?' Most of us will reply that they are for our entertainment, fun and even unfortunately some will reply 'for movies and Bollywood'. Now if we look back at our history during 18th century we see that even first newspapers were started for spreading information in mass. Earlier literacy rate of India was very low.
A single person used to first read the newspaper and then shared the information to the gathered people around. But that time was different. Now nearly every person has a mobile phone, TV, PC and what not. Has this increased public participation in Democracy ? Yes indeed it has done that. On one single click we get information of our surrounding at a faster pace. As a fourth pillar of Democracy it makes our mindful of different social, political and financial exercises around us.
If we take current situation, most of the election popularisation works in different states is being managed by mass media only due to its advancements. Media makes participation of people in political activities even at grass - root levels. This efficiency enhances the Federalism of India. Media has many roles in shaping public opinion in our society. Let's discuss them one by one. In economic terms, media shows the expenditure, budgets and taxes to the citizens of a nation.
It makes people aware of the different types of money related issues that they have to face. Even it checks that no people are harassed by fake news on balances. Its makes people rise over their concern directly to the government so that actions can be taken for them. In social terms, media promotes the functioning of the government. It helps people to convey their social problems to the government. Even many NGOs and Human Rights Organizations take help of medias to make people aware of their rights.
Commonly Media acts as an inference or better to say 'compass' which gives direction to the views of people. It organises the vast multitudes of opinions into a single issue which can be beneficial to all the groups of society. It works 24 × 7 and makes people get in touch with latest developments. As 'Opposition' in Politics, media acts as a hub where the opposition party by taking views of public claims the wrong decisions of Ruling Party.
Also, during elections media shows mirror about different parties to people so that we can make right decision in voting. All these were some positive aspects of media's influence on public opinions. Now let's discuss about some negative aspects also. Nowadays its a common seen trend that media enlarges a short issue just to gain popularity. This results in riots, violence, protests, etc. because the issue which could have been solved by a single subtle discussion, now has been made a larger issue.
Let me present an example. I have a friend, Cupicake. She remains quite much familiar with medias. Some days ago, she received a post which asked her to share the image attached with it to her other friends. That image was of a case where Police was beating a few groups of people. She has shared that. This led a immediate violence in that region and finally it was known that Police was beating a few robbers. Now who to put blame of that riot ? Of course we are the one who done it.
At last I would like to conclude my speech by just saying that, it is the duty of media to transfer right and reliable information to people and its duty of people to share and trust upon right information from a good source. In this way the world and the nation would be leaded to right path.
Thank you one and all.
_______________
★ More to know :-
Format of Speech :
*Note - Here I used name as Aurora. You can use any according to your choice and class also according to the situation.
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hope that u r helpful
please follow thank and brinlylist please
Thank You...♡♡
The earth’s crust is subdivided into
A. Lithosphere, hydrosphere and atmosphere.
B. Troposphere, stratosphere and ionosphere.
C. Core, mantle and atmosphere.
D. Hydrosphere, geosphere and stratosphere.
Answer:
c. core, mantle and atmosphere
Answer:
Correct answer is letter A
Because Lithosphere includes the crust and the uppermost mantle.
How many grams of MgCl2 would be needed to make 5.3 liters of a 0.25 molar solution? Round your answer to the nearest 0.01,
Answer: 126.1 grams of are needed to make 5.3 L of 0.25 M solution
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
To calculate the mass of solute for given molarity, we use the equation:
[tex]\text{Molarity of the solution}=\frac{\text{given mass of solute}}{\text {Molar mass of solute}\times \text{Volume of solution in L}}[/tex]
[tex]0.25M=\frac{x}{95.2g/mol\times 5.3L}[/tex]
[tex]x=126.1g[/tex]
Thus 126.1 grams of are needed to make 5.3 L of 0.25 M solution
4 NH3 +5 02 +4NO + 6H2O
When 70.25 grams of NH3 react, how many moles of H20 are produced?
Answer:
6.19 mol H₂O
Explanation:
4 NH₃ + 5O₂ → 4NO + 6H₂OFirst, we convert 70.25 grams of NH₃ into moles, using its molar mass:
70.25 g ÷ 17 g/mol = 4.13 mol NH₃Then we convert 4.13 moles of NH₃ into moles of H₂O, using the stoichiometric coefficients of the balanced reaction:
4.13 mol NH₃ * [tex]\frac{6molH_2O}{4molNH_3}[/tex] = 6.19 mol H₂OFor the reaction 2 Al + 3 H2SO4⟶ 3 H2 + H2(SO4)3 how many grams of sulfuric acid, H2SO4, are needed to react completely with 53.7 g of aluminum, Al??
Answer:
292.4 g
Explanation:
2Al + 3H₂SO₄ → 3H₂ + Al₂(SO₄)₃First we convert 53.7 g of Al into moles, using its molar mass:
53.7 g ÷ 27 g/mol = 1.99 mol AlThen we convert Al moles into H₂SO₄ moles, using the stoichiometric coefficients:
1.99 mol Al * [tex]\frac{3molH_2SO_4}{2molAl}[/tex] = 2.98 mol H₂SO₄Finally we convert 2.98 moles of sulfuric acid into grams, using its molar mass:
2.98 mol H₂SO₄ * 98 g/mol = 292.4 g16. When a person looks up into the sky and
sees a full moon, what fraction of the
bright surface of the moon do we see?
Answer:we see 1 side because the other side is not visible
Explanation:
Write balanced complete ionic equation for
CaS(aq) + CaCl2 (aq) –> CdS(s) + CaCl2 (aq).
Express your answer as a chemical equation. Identify all of the phases in your answer.
Answer:
Ca²⁺(aq) + S²⁺(aq) + Cd²⁺(aq) + 2Cl¯(aq) —> CdS (s) + Ca²⁺(aq) + 2Cl¯(aq)
Explanation:
CaS (aq) + CdCl₂ (aq) –> CdS (s) + CaCl₂ (aq)
The complete ionic equation for the above reaction can be obtained as illustrated below:
In solution:
CaS (aq) —> Ca²⁺(aq) + S²⁺(aq)
CdCl₂ (aq) —> Cd²⁺(aq) + 2Cl¯(aq)
CaS (aq) + CdCl₂ (aq) –>
Ca²⁺(aq) + S²⁺(aq) + Cd²⁺(aq) + 2Cl¯(aq) —> CdS (s) + Ca²⁺(aq) + 2Cl¯(aq)