Answer:
All these have one electron in the outermost shell.
They form unipositive ions.
They are good reducing agents.
They are soft metals.
They impart color to the flame.
The common name of the group is alkali metals
Explanation:
Lithium, sodium, potassium, rubidium, and cesium are all part of a group called the alkali metals. They are all soft metals in elemental form and they all react violently with water. They react so strongly because they all readily lose an electron to form the +1 cation very easily. n their pure forms, the alkali metals (lithium, sodium, potassium, rubidium, and cesium) are soft, shiny metals with low melting points. Alkali metals react readily with air and moisture. The alkali metals are six chemical elements in Group 1, the leftmost column in the periodic table. They are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
The section "The Necessary Resources" introduces the idea that communism was a reaction to capitalism.The section "Karl Marx And Communism" develops this idea by ........(A)explaining how Marx believed the goals of communism would fix the problems of capitalism.(B)describing where Marx studied capitalism to research ideas for his book on communism.(C)explaining why Marx thought capitalism made rich people richer and hurt workers.(D)describing who Marx inspired to follow the ideas in his new system called communism.
Answer:
(A)explaining how Marx believed the goals of communism would fix the problems of capitalism.
Explanation:
In the section, "The Necessary Resources", after listing the four resources needed for an economic system to thrive, the author explained the practice of capitalism in the mid-1800s, where people owned private property and how Karl Marx and Friedrich Engels came up with the notion that capitalism did not allow for the fair distribution of resources.
In the section, "Karl Marx and Communism", further explanation was provided as to how Marx felt that capitalism caused a gap between the rich and the poor, how that system was unfair to poorly paid workers and how communism will soon replace capitalism.
The primary source of chemical energy in the body is
ADP
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The compound cobalt (II) sulfate forms a hydrate with seven water molecules per formula unit. What are the name and formula of the hydrate
Answer: The formula of the hydrate will be [tex]CuSO_4.7H_2O[/tex] and the name of the compound is copper sulphate heptahydrate.
Explanation:
Water of crystallisation is the number of water molecules that combine chemically in definite molecular proportion with the concerned salt in the crystalline state.
The formula of the hydrate will be [tex]CuSO_4.7H_2O[/tex] and the name of the compound is copper (II) sulphate heptahydrate as there are 7 molecules of water.
We see below that 3-methyl-3-hexanol can be synthesized from the reaction of 2-pentanone with ethylmagnesium bromide. There is a scheme of a chemical reaction, where CH3CCH2CH2CH3, with an O atom double-bonded to the second (from left to right) carbon (2-pentanone) reacts with CH3CH2MgBr (ethylmagnesium bromide). The arrow goes from the single bond between CH3CH2 and MgBr to the second C atom of 2-pentanone. The second arrow goes from the double bond between the second C atom and the O atom of 2-pentanone to the O atom. An intermediate is CH3CCH2CH2CH3, with a CH2CH3 group and an O minus MgBr plus group attached to the second carbon. In the presence of H3O plus the intermediate goes to CH3CCH2CH2CH3, with a CH2CH3 group and an OH group attached to the second carbon (3-methyl-3-hexanol, a tertiary alcohol). What other combinations of ketone and Grignard reagent could be used to prepare the same tertiary alcohol
Answer:
See explanation below
Explanation:
Ok, the first picture is your exercise. We have one type of reaction to form the 3-methyl-3-hexanol.
Now, according to the question, you want another form to get the 3-methyl-3-hexanol. In this case, the easiest way to do this, is using a ketone with the 6 carbons, and the grignard reagent to use should have the methyl group. Now, in which carbon should the carbonile group be? well, as the final product has the OH group in carbon 3, then the reaction is taking place there. So the reactants would be the hexan- 3 - one and the methyl magnesium bromide.
The second picture, you'll see the reactants and final product.
Hope this helps
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Please help it really important, I will mark brainliest please
Answer:
S0rRy i d0nT kn0w fRenCh
Which of the following is an ether?
A)
B)
C)
D)
neptune has an average distance to the sun of 30.06 au in two or more complete sentences explain how to calculate the orbital period of neptune
Answer:
As per Kepler's law we know that \frac{T_1^2}{T_2^2} = \frac{R_1^3}{R_2^3}T22T12=R23R13as we know that for earth the time period is 1 year and its distance is 1 AUnow from above formula we can saylet the time period of Neptune is T and its distance is given as R = 30.06 AUnow we will have\frac{1^2}{T^2} = \frac{1^3}{30.06^3}T212=30.06313by rearranging the above equation we haveT^2 = (30.06)^3T2=(30.06)3T = 164.8 yearsT=164.8yearsso it will have time period of 164.8 yearsAt pH ___, the pentapeptide Ala-Glu-His-Val-Cys would contain two positively charged groups and one negatively charged group.
Answer:
3
Explanation:
At pH 3, the pentapeptide Ala-Glu-His-Val-Cys would contain two positively charged groups and one negatively charged group.
This is evident in that peptides have both carboxylic and amino groups.
Given that peptides have a certain amount of H⁺ and OH⁻ ions, it converts to zwitterions.
This conversion process is based on pKₐ and pKb of the acid and the base accordingly.
Therefore, they have two positively charged groups and one negatively charged grou
What are the three types of diagrams in science? This if eight grade science
Answer: bar graph, circle graphs, line graphs
Explanation:
#3. How does a fever aid an immune response?
Answer:
it can tell and show what pathogen is in you as well what type and mutation so then your body can fight back and remember the genetic dna so then you will be immune in some way.
Explanation:
Question;
How does a fever aid an immune response?
Answer:
One type of immune cell jumps into the fray after body temperature rises, according to experiments in mice. A fever fights infection by helping immune cells to crawl along blood-vessel walls to attack invading microbes
Name this branched alkane shown in Figure 18-1.
Answer:
3–ethyl–2,2–dimethylhexane
Explanation:
To name the compound given in the question above, do the following:
1. Determine the parent name by determining the longest continuous carbon chain. In this case, the longest continuous carbon chain is 6. Hence, the parent name is Hexane.
2. Identify the substituent group attached to the compound. In this case, we have one ethly group (–CH₂CH₃) and two methyl groups (–CH₃)
3. Locate the position of the substituents by giving them the lowest possible count. In this case,
The two methyl groups (–CH₃) are located at carbon 2
The ethly group (–CH₂CH₃) is located at carbon 3.
4. Combine the above to obtain the name of the compound.
The name of the compound is:
3–ethyl–2,2–dimethylhexane
5. Water displacement is a method to measure ?
O volume
Odensity
mass
O temperature
PKEASE HELP
Answer:
density
Explanation:
density, volume holds fluid, and temperature is negligible
pls help me on this it's about acceleration
Answer:
1: A b/c the table is showing that each different surface resulted in different time for acceleration.
2: D b/c the if the same force is applied to two different masses, the smaller masses would be impacted more and move faster. The larger an object is, then the greater the force you will need for it to move the same distance as the smaller masses.
How can scientists make orange juice smell pleasant?
name the two criteria that is used to determine if a substance is pure or not
Answer:
Melting and Boiling Point Determination
The physical properties of a substance can be used to establish its purity. These properties include the melting point and boiling point. Different substances tend to have different melting and boiling points, and any pure substance will have a specific melting and boiling point.
The atomic number of calcium is 20. How many protons does it have?
Explanation:
The number of protons is equal to atomic number of an element.
So, Calcium has 20 protons.
Hope it helps :)
What type of reaction is AB+C=CB+A
Ethyl alcohol boils at a lower temperature than water. What does this indicate about the attractive forces of ethyl alcohol
Answer:
their intermolecular forces are less as it is easier to separate them from each other
Explanation:
Calculate the volume, at STP, of a 0.950 g sample of Carbon Monoxide gas, CO.
What is true of a covalent bond? (4 points)
Explanation:
-It is the electrostatic attraction between oppositely charged particles..
-It is the sharing of electrons by overlapping orbitals.
-It involves the exchange of electrons from one atom to another.
- It involves the sharing of neutrons between two nuclei.
Answer:
a covalent bond is defined as bond formed due to sharing a electrons between the combining atoms.
Explanation:
definition.
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What makes a White Dwarf Star different from Main Sequence, Giant, and Supergiant stars?
Answer:
Formation. Main-sequence stars, including the sun, form from clouds of dust and gas drawn together by gravity. ... The core that is left behind will be a white dwarf, a husk of a star in which no hydrogen fusion occurs. Smaller stars, such as red dwarfs, don't make it to the red giant state.
Explanation:
Learning ObjectivesIn this activity, you'll practice determining the limiting reagent for a reaction between silver nitrate and copper metal. In part 1 you'll make the measurements you need so you can predict the amount of silver produced. In part 2 you'll be able to measure how much silver was actually produced. Finally you will be asked to consider possible reasons for the discrepancy.Part 1: Describe the ReactionIn this activity, you will be observing a reaction where copper and silver nitrate react to form copper (II) nitrate and silver.1.Write a balanced chemical equation for this reaction.2AgNO3 Cu -> 2Ag Cu(NO3)2Score: 0 / 12.
Answer:
Explanation:
The balanced chemical reaction equation is;
2AgNO3(aq) + Cu(s) -> 2Ag(s) + Cu(NO3)2(aq)
When we balance chemical reaction equations, we ensure that the number of atoms of each element on the left hand side of the reaction equation is exactly the same number of atoms of each element on the right hand side of the reaction equation.
Let us consider this reaction;
There are two atoms of Ag on both sides of the reaction equation
There are six atoms of O on both sides of the reaction equation
There are 2 atoms of N on both sides of the reaction equation
There is one atom of Cu on both sides of the reaction equation.
Hence, the reaction equation is balanced.
The osmotic pressure exerted by a solution is equal to the molarity multiplied by the absolute temperature and the gas constant R. Suppose the osmotic pressure of a certain solution is measured to be 20.atm at an absolute temperature of 321.K. Write an equation that will let you calculate the molarity c of this solution. Your equation should contain only symbols. Be sure you define each symbol other than R.
Answer:
20 atm / (R . 321 K . i) = M
Explanation:
Osmotic pressure is a colligative property which is determined by the solute.
Solutes over solutions, can increase the osmotic pressure which is calculated like this:
P = M . R . T
where P is pressure, M is molarity, R the Universal Constant Gases and T, the absolute Temperature. We also have to consider the Van't Hoff factor, i, numbers of ions dissolved. Ionic salts determine more osmotic pressure than organic compounds, where i = 1. Then, the complete formula is:
π = M . R . T . i
To determine molarity, osmotic pressure divide all the terms:
20 atm / (R . 321 K . i) = M
R = 0.082 L.atm/mol.K
If you see all the units in R, they will be cancelled, so finally the answer will be mol/L, which is molarity. The i term has no unit!.
How heavy is a gallon of water
Answer:
Approximately 8.3 pounds.
Explanation:
it’s an astronomy question
Which method would you use to obtain the distance to each of the following? An asteroid crossing Earth's orbit B. A star astronomers believe to be no more than 50 light-years from the Sun A tight group of stars in the Milky Way Galaxy that includes a significant number of variable stars D. A star that is not variable but for which you can obtain a clearly defined spectrum
Answer:
A. Radar would be the best tool for measuring distances to objects in the solar system.
B. A parallax measurement would be best for this nearby star.
C. Cepheids or RR Lyraes would be useful for determining the distance to this cluster.
D. The method using the H-R diagram and getting a spectrum to determine the luminosity class of the star.
Which of the following sources could not be used to obtain the DNA of a person lost in a mass disaster? used and unwashed clothing or bed sheets food found in the victim's refrigerator sunglasses regularly used by the person a toothbrush used by the person
Which of the following sources could not be used to obtain the DNA of a person lost in a mass disaster?
used and unwashed clothing or bed sheetsfood found in the victim's refrigeratorsunglasses regularly used by the persona toothbrush used by the personAnswer :food found in the victim's refrigerator could not be used to obtain the DNA of a person lost in a mass disaster.
So, correct answer is 2nd one.
What is the volume in liters of 2.5 moles of CO gas-
Answer:
En CNPT un mol de cualquier gas ocupa 22,4 litros
Entonces hay que multiplicar
2.5 x 22.4 litros y eso es igual a 56 litros de gas metano
PD: CO2 es dióxido de carbono, metano es CH4
Sydney and Valparaiso are the same distance from the equator and both are near the ocean. Is Valparaiso warmer, colder, or the same temperature as Sydney? Explain why as completely as you can.
Answer:
Valparaiso is colder than Sydney.
Explanation:
At Valparaiso, the prevailing wind closer to the South Pole hits the continent (when a prevailing wind hits a continent, it has to alter in its direction to follow coastline).
Valparaiso's air temperature is cold
Sydney is warm
^Warmer materials transfer energy to colder materials
To conclude everything stated, Valparaiso is colder than Sydney.
Valparaiso's air temperature is cold than Sydney
Temperature between Sydney and ValparaisoAs Sydney and Valparaiso are located at the same distance from the equator and both are near to the ocean but then Valparaiso is colder than Sydney. At Valparaiso, the prevailing wind closer to the South Pole which hits the continent.
When a prevailing wind hits a continent, it has to alter in its direction to follow coastline so that's why Valparaiso's air temperature is cold than Sydney.
Learn more about temperature here: https://brainly.com/question/25677592
During radioactive decay, the __________ isotope decays into a ____________ isotope that has a different ___________________ number.
Answer: Please find answer in explanation column
Explanation:
During radioactive decay, the __unstable ________ isotope decays into a _stable ___________ isotope that has a different ____proton _______________ number
Or
During radioactive decay, the _ unstable parent nuclide ________ isotope decays into a _stable daughter nuclide ___________ isotope that has a different ____proton _______________ number.
There are 3 types of radioactive decay;alpha, beta and gamma, Of which the above clearly explains the beta decay. In beta decay, the unstable isotope having excess neutrons will undergo a beta decay emitting a beta particle.( ⁰₋₁e) causing the nucleus to loose a neutron but gain a proton.
Some heavy unstable isotopes which undergo radioactive (beta decay ) to become stable isotopes are phosphorus-32, strontium-90, iodine-131
Using Strontium 90 as an example , we have
⁹⁰₃₈St ----->⁹⁰₃₉Y + ⁰₋₁e
Strontium an unstable isotope undergoes a beta radioactive decay to form Yttrium.