Answer:
Questions are an essential part of science. ... They state the final question in a way that can be answered by investigation or experiment. A good scientific question is: “What effect does the pH of water have on radish seed germination?” Good scientific questions are defined, measurable, and controllable.
(iii) Explain why magnesium chloride has a high melting point.
Answer:
magnesium chlorides are solids with high melting and boiling points because of the large amount of heat which is needed to break the strong ionic attractions.
Explanation:
These magnesium ions have more than one charge (2+). These highly charged ions will attract other ions more strongly than ions with one charge, therefore more energy will be needed to overcome the electrostatic forces of attraction and so the melting points will be higher.
Identify the functional groups present in each molecule.
A 19-carbon compound is composed of one five-membered ring and three six-membered rings.
Carbon 3 is double bonded to an oxygen and attached to carbon 2 and carbon 4.
Carbon 17 is attached to an oxygen, which is attached to a hydrogen.
i. hydroxyl group
ii. carboxyl group
iii. carbonyl group
A central carbon is attached to an amine, two hydrogens, and a carbon that is double bonded to an oxygen and single bonded to an oxygen attached to a hydrogen.
i. amino group
ii. carboxyl group
iii. amide group
Answer:
Carbon 3 is double bonded to an oxygen and attached to carbon 2 and carbon 4. :
Answer: Carbonyl group ( Ketone or aldehyde)
Carbon 17 is attached to an oxygen, which is attached to a hydrogen. :
Answer: Carboxyl group (Carboxylic acid)
A central carbon is attached to an amine, two hydrogens, and a carbon that is double bonded to an oxygen and single bonded to an oxygen attached to a hydrogen. :
Answer: Amide group
An amide group contains both amine and carboxyl
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Can you help me solve this ?
What differences between snow and sand
Answer:
difference is the temperature at which they melt. Snow melts at 0°C, whereas sand melts at about 1600°C! The temperature at which something melts is its melting point.which among the materials have a varying amount of components are they compounds or mixtures
Answer:
Matter can be broken down into two Zalo categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components.
Acetylene (C2H2) gas and oxygen (02) gas react to form carbon dioxide (CO2) gas and water (H20) vapor. Suppose you have 2.0 mol of C,H, and 1.0 mol
of o, in a reactor
Calculate the largest amount of CO, that could be produced. Round your answer to the nearest 0.1 mol.
The largest amount of CO₂ produced when 2 moles of C₂H₂ reacted with 1 mole of O₂ is 0.8 mole
We'll begin by writing the balanced equation for the reaction. This is given below:
2C₂H₂ + 5O₂ —> 4CO₂ + 2H₂O
2 : 5
2 : 1
From the balanced equation above,
We can see that O₂ is the limiting reactant as lesser amount of it is available.
Finally, we shall determine the largest amount of CO₂ produced by using the limiting reactant as illustrated below:
From the balanced equation above,
5 moles of O₂ reacted to produce 4 moles of CO₂.
Therefore,
1 mole of O₂ will react to produce = 4/5 = 0.8 mole of CO₂.
Thus, the largest amount of CO₂ produced from the reaction is 0.8 mole
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What is the hydroxide concentration in a 0.20 M potassium acetate solution?
Answer:
Molar concentration of potassium hydroxide
= 0.27 Mol liter/approx
Que son Moléculas neutras
Answer:
Una molecula en que hay igual numero de cargas positivas y negativas y los electrones estan distribuidos de modo que no hay regiones con carga parcial(o sea una molecula no polar). Esto ocurre cuand los atomos tienen mas o menos igual electronegatividad para atraer los electrones.
Explanation:
What is this atom structure?
Write the full electron configuration for an N2− ion
Answer:
The full electron configuration for an N2− ion is 1s^2 2s^2 2p^5
The electronic configuration of the N²⁻ ion is 1s²2s²2p⁵.
What is an electronic configuration?The electron configuration can be described as how electrons are distributed in different energy levels or electron shells of an atom of an element. In the electron configuration of an atom, the number of electrons can be written as a superscript of electron atomic subshells. For example, the electron configuration of magnesium can be written as 1s²2s²2p⁶3s².
The principal quantum number (n) can be defined as the maximum number of electrons that can be filled in an electron shell of an atom. The formula used to determine is 2n², where ‘n’ is the principal quantum number.
The atomic number of the nitrogen atom is 7 and the electronic configuration is 1s²2s²2p³. When it gains two electrons then it has 9 electrons in total. The nine electrons can be filled as 1s²2s²2p⁵.
Therefore, the electronic configuration of the N²⁻ ion is 1s²2s²2p⁵.
Learn more about electronic configuration, here:
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what is the mass in grams of 0.250 mol of the common antacid colcium carbonate?
A. 25.0 g
B. 2.50 ×10-3
C. 4.00×102g
D. 4.00×1021g
E. 2.00×10-4 g
Answer:
b
Explanation:
i just had the same question
What will happen to the pH of sodium bicarbonate if vinegar is added to it?
Answer:
The overall chemical reaction between baking soda (sodium bicarbonate) and vinegar (weak acetic acid) is one mole of solid sodium bicarbonate reacts with one mole of liquid acetic acid to produce one mole each of carbon dioxide gas, liquid water, sodium ions, and acetate ions. The reaction proceeds in two steps
can anyone heelp me pls pls
Answer:
Lotion=liquid
suspension=semisolid
capusule=solid
Explanation:
which of the two glasses the ingredients dissolved completely class/sand or sugar
Answer:
sugar
Explanation:
sand will not dissolve in water because the bond in water isn't strong enough to dissolve it.
so sand is a big no.
so the answer is the other option: which is sugar.
Determine the amount of grams present in
3.25x1024 atoms of Lithium.
Answer:
Explanation:
Molar mass of Lithium is 6.9410 g/mol.
This means 1 mol of Li atoms weigh 6.9410 g
In 1 mol 6.022 x 10 ^ 23 atoms should be present
So, in 6.9410g , there should be 6.022 x 10 ^ 23 atoms.
So weight of 1 atom = a = 6.9410 g / (6.022 x 10^ 23)
To find weight of 3.25 x 10 ^ 24 atoms we have to multiply a by 3.25 x 10^ 24
So you will get the answer as
[6.9410 g / (6.022 x 10^ 23)] x 3.25 x 10^ 24
= 37.46 g
Which of the following molecules is nonpolar?
Ο Α. CO2
Ο Β. SO,
Ο Ο Ο Ο
O C. CO
D. NO
Answer:
CO2
Explanation:
There are two types of moleculesPolarNon polarNon polar molecules are insoluble in water .
Option A
[tex]\sf \longmapsto co_{2}[/tex]
[tex]\sf Co_{2}[/tex] is a non polar molecule.[tex]\sf \longmapsto\sf Co_{2}[/tex]
Lewis Structure =
[tex]\sf \longmapsto\sf \: o \: = c = o[/tex]
[tex]\sf \longmapsto4 + 6(2)[/tex]
[tex]\sf \longmapsto16[/tex]
Non polar molecules are non-soluble in water.what is the importance of hydrogenation
Answer:
It improves the oxidative stability of the oil.
The hydrogenation process increases the melting point of the fat, which changes liquid oil into solid shortening.
Explanation:
A flask of water is sealed with a balloon and heated to various temperatures on a hot plate
Answer:
What is the question?
Explanation:
You just gave a statement.
Answer:
it will increase
Explanation:
Is this equation balanced and in the lowest form?
4NH3 → 2N2 + 6H2
Answer:
It's balanced but not in the lowest form
Explanation:
The actual equation is given by
[tex]\\ \sf\longmapsto 2NH_3\longrightarrow N_2+3H_2[/tex]
EXPLAIN BRIEFLY WHY CHEMISTRY IS CONSIDERED AS MAJOR BRANCH OF SCIENCE
Answer:
Chemistry is sometimes called “the central science,” because it bridges physics with other natural sciences, such as geology and biology. Chemistry is the study of matter and its properties.
Explanation:
~found it~
Which circle contains the mixture? Is it D?
Can you give a definition of what Sodium Hydroxide
Answer:
Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na⁺ and hydroxide anions OH⁻
Explanation:
Also can you mark me as brainliest.
What molecule is this?
Answer:
O2C
Explanation:
Answer:
Carbon Monoxide (CO) is a colorless, odorless, tasteless, toxic gas that has the molecular formula CO. The molecule consists of a carbon atom that is triply bonded to an oxygen atom. ... The linear molecule consists of a carbon atom that is doubly bonded to two oxygen atoms, O=C=O
Explanation:
If gas is truly to be classified as a form of matter this means it can be measured. What form of gas can be measured?
Answer:
Gas is sometimes measured in cubic feet at a temperature of 60 degrees Fahrenheit and an atmospheric pressure of 14.7 pounds per square inch. Gas production from wells is discussed in terms of thousands or millions of cubic feet (Mcf and MMcf). Resources and reserves are calculated in trillions of cubic feet (Tcf).
Answer:
A dry gas, that is a natural gas, is the form in which gas can be measured.
And gas is measured in cubic meter, that is, it's volume is measured and the size of gas can be determined.
All the best!
Select the statements that correctly describe an comet. Check all that apply
made of metals and gas
made of ice, dust, and gas and display a tail near the Sun
have short orbits that keep them close to the sun
have huge elliptical orbits that take them past Neptune
Answer:
made up of ice dust and gas and display a tail near the sun
Explanation:
You have an atom with 17 protons, 18 neutrons, a net charge -1, and a mass of 35. How many electrons does this atom have?
Answer:
this atom have 18 electronsExplanation:
we know that in nutral state of atom , an atom have equal number of protons and electrons ,but in this question this atom is not nutral means it is charged this atom have -1 charge this means it gains 1 electron .in nutral state if an atom have equal number of proton and electron when the atom is charged(gain or lost certain amount of electron) number of electron become proton -the electron it losts or proton + the electron it gainsthis atom have -1 charge this means it gains 1 electron so the number of electron calculated by ; proton + the number of electron it gains; this atom have 17 protons so , number of electron =17+1=18there fore this atom have 18 electrons. I think its helpful for youPlease answer question (e)
Answer:
here is no question (e).............
I'll mark you the brainiest if you answer this question first!!!
Read the CDC's recommendations for frequency of handwashing. Do you agree with these recommendations? Explain your answer using the results from the experiment as evidence.
Link down below:
https://www.cdc.gov/handwashing/when-how-handwashing.html
Answer:
Yes, Because the dishes that are unwashed have the most bacteria while the soap & water dish has the least bacteria.
Explanation:
Hope this help
State at least three different properties of metallic compounds?
Answer:
Very High melting and boiling points.
Very Good Conductors of heat and electricity.
Malleable (can be made into different shapes without breaking)
Ductile (can be molded into wiring)
Explanation:
Answer:
Very High melting and boiling points
Very Good Conductors of heat and electricity
Malleable (can be made into different shapes without breaking)
Ductile (can be molded into wiring)
Metallic luster (shiny)
Sometimes magnetic
Explanation:
a
A 49.8 mL sample of gas in a cylinder is warmed
from 18°C to 83 °C.
what is it’s volume at the final temperature? (Assume constant pressure)
Using Charles law
[tex]\\ \sf\longmapsto V_1T_2=V_2T_1[/tex]
[tex]\\ \sf\longmapsto V_2=V_1T_2\div T_1[/tex]
[tex]\\ \sf\longmapsto V_2=\dfrac{49.8(356)}{291}[/tex]
[tex]\\ \sf\longmapsto V_2=\dfrac{17728.8}{291}[/tex]
[tex]\\ \sf\longmapsto V_2=60.9mL[/tex]
