Answers
N and C
_____________________________________WHY OPTION A?Because Lithium and Sodium belong to group 1A whereas Magnesium is from group 2A, which are S block elements and they form ionic bond.
_____________________________________HOPE IT HELPS!Answer:
N and C
Explanation:
Os the right answer
Related Questions
Atoms that gain
an electrons
have a _____
Charge?
Answers
Answer:
positive
Explanation:
PLS HELP
True or False: Water molecules, as a liquid, are very spread apart because of their attractions for one another. *
Answers
50 points:
Several thousand years ago, people sought after the truth about the nature of matter by
Answers
Answer:
Is this a true or false?
Explanation:
is this a t or f question?
What has modern media shown you about atoms
Answers
Neutral atoms have the same number of____
What’s the missing word?
Answers
Answer:
electrons and protons
Explanation:
the following body systems is responsible for releasing waste?
Answers
Answer:
the urinary system??
Explanation:
What is the function of enzymes in living organisms?
Answers
Answer:
jh
Explanation:
Fossils of sea creatures have been found near the top of Mount Everest (8848m above the sea level). How do you think they could have got there?
Answers
Explanation:
The fossils can be found on top of mount Everest due to regional uplift of the crust.
Mount Everest is located a along a convergent margin between two tectonic plate. Due to similarity in density between the two margins, when they collide, there is tectonic build up.
Sedimentary rock layers originally at sea levels are uplifted to those tower peaks as the plate continues to grind against each other.
Most sedimentary rocks contains fossils. As the grinding continues, the uplift and deformation continues.
How many electrons does each atom have? What group is each in?
Answers
In an atom, the electron's spin around the center, also called the nucleus. The electrons like to be in separate shells/orbitals. Shell number one can only hold 2 electrons, shell two can hold 8, and for the first eighteen elements shell, three can hold a maximum of eight electrons. ( This is the answer to both questions!)
What are isotopes?
A.) Atoms of the same element that have a different number of protons
B.) Atoms of the same element that have a different number of neutrons
C.) Atoms of different elements that have the same number of neutrons
D.) Atoms that are unstable
Answers
Answer:
B
Explanation:
Answer:
B. ATOMS OF THE SAME ELEMENT THAT HAVE A DIFFERENT NUMBER OF NUETRONS
Explanation:
Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
Jeremiah pushed Anthony with a net force of 12 N. Anthony accelerated across the hall at 0.2 m/s2. What was Anthony’s mass?
Answers
Answer:
6
Explanation:
Work Shown:
Force = Mass*Acceleration
F = ma
12 = m*0.2
12/0.2 = m
60 = m
m = 60 kilograms
PLEASE HELP!!!!
What is the molar mass of 18.12 g of gas
exerting a pressure of 3.05 atm on the
walls of a 5.85 L container at 280 K?
Answers
Answer:
23.3 g/mol
Explanation:
The molar mass of 18.12 g of gas exerts a pressure of 3.05 atm on the walls of a 5.85 L container at 280 K is 23.3 g/mole.
What is the molar mass?Molar mass is the concentration of a substance that is present in a specific liquid. It is also called the concentration of a substance.
The molar mass can be calculated by the formula of an ideal gas:
PV = nRT
P is the pressure
V is the volume
n is the number of moles
R is the constant of gas.
T is the temperature.
The given amounts are the molar mass of 18.12 g.
The pressure is 3.05 atm.
The volume is 5.85 L
The temperature is 280 K
Putting the value in the equation
n = PV/RT = (3.05) (5.85) / (0.0821) (280) = 0.777 moles of gas
Molar mass = 18.12 g/0.777 moles = 23.3 g/mole
Thus, the Molar mass is 23.3 g/mole.
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The half-life of carbon-14 is about ____________ years.
Fill in the blank.
Answers
Answer:
5730 years
Explanation: for more on radiocarbon dating.) and hence explain why the amount of carbon-14 in the sample decays by half over any period of 5730 years.
C3H5(NO3)3
How many atoms of oxygen are there?
Answers
Answer: 6
Explanation:
Mark brainliest plzzz if correct
In C₃H₅( NO₃ )₃ there are total six number of oxygen atoms are present and three atoms of carbon, 5 atoms of hydrogen and 3 atoms of nitrogen present.
What is oxygen ?The chemical element with the atomic number 8 and symbol O is called oxygen. It belongs to the periodic table's chalcogen group, is a very reactive nonmetal, and an oxidizing agent that easily produces oxides with most elements as well as other compounds.
Dioxygen is the name given to the colorless, odorless, and tasteless gas that is oxygen at standard pressure and temperature.
Chemical elements are substances that only contain one kind of atom, such as oxygen. Since oxygen has an atomic number of 8 and the official chemical symbol O, an oxygen atom has eight protons in its nucleus. At room temperature, oxygen is a gas that has no flavor, color, or odor.
Thus, In C₃H₅( NO₃ )₃ there are total six number of oxygen atoms are present.
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Give the IUPAC name:
Answers
Answer:
hope the answer helps you
Explanation:
3 ethyl 2 hexene
plzz give me brainliest
By the IUPAC Naming Convention followed by every chemical standards, the structure from the question is named as 4,4-dimethyl heptane.
IUPAC Stands for International Union of Pure and Applied Chemistry.This organisation issued some standards for naming any chemical components that is followed world wide.
According to the IUPAC Standards:
First of all we have to identify the longest carbon chain which is an alkane group according to this question.As a result of 7 carbon linked with single bonds it will be named heptane.Now moving to the other parts:
[tex]-CH3[/tex] is termed as methyl
As the both the methyl group( [tex]-CH3[/tex] ) is linked with the fourth carbon the numbering is 4 for methyl.So,the IUPAC name of this compound in the image is 4,4-dimethyl heptane.
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Which is the last section of the digestive system?
small intestine
liver
large intestine
rectum
Answers
The last section of the digestive system is the rectum.
What is digestive system?Digestive system is the system of the body that comprises of organs,enzymes that help to break down large molecules of food into smaller mole yles which is easily absorbed by the body.
Therefore, The last section of the digestive system is the rectum.
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Answer:
r3ctum
Explanation:
for people on edge.
How do the products of chemical reactions compare to their reactants?
Question 5 options:
The products often have completely different properties than the reactants.
The products usually weigh more than the reactants.
The products usually have more atoms than the reactants.
The products are usually more toxic than the reactants.
Answers
Answer: The products usually weigh more than the reactants.
Explanation:
Answer:
A
Explanation:
i just took the k12 test
Everyone has a laughing place, The trouble is most people don't take the time to look for it.
true
or
false
Answers
Answer:
True
Explanation:
Answer:
True
Explanation:
Most people stick to what they know and don't look for a laughing place.
Which of the following describes a species with the greatest fitness?
The species that can reproduce beter than the others
The species that is faster than the others
The species that is stronger than the others
The species that is larger than the others
Answers
Answer:
C is it!
Explanation:
1.) What is the molecular weight of the ketone shown below?
2.)Dry ice sublimes at −78.5 oC at a pressure of 1 atm. At room temperature and 1 atm pressure, what is happening to the dry ice molecules on a molecular level as sublimation occurs?
3.)For the pairs of molecules given below, list the intermolecular forces in each molecule. Also, give the types of electrostatic interactions that could occur between each pair of molecules
cyclohexane and CH2Cl2
CH3CH2OCH2CH3 and CH3CN
Answers
Answer:
See explanation
Explanation:
1. The Ketone was not sown in the question but i can give you a general idea of how to calculate its molecular weight. A ketone has a general molecular formula of CnH₂nO.
The molecular weight is calculated knowing that the relative atomic mass of carbon is 12, that of hydrogen is 1 while that of oxygen is 16.
Hence from the general molecular formula, the molecular weight of any ketone is calculated from; n(12) + 2n(1) + 16. Where n represents the number of atoms of each element in the ketone.
2. Sublimation of dry ice occurs when the molecules in dry ice absorb sufficient energy in the form of heat such that they now have enough energy for some molecules to overcome the inter molecular forces acting in the solid crystal and transform directly into the vapor phase. This process is endothermic.
3.
cyclohexane and CH2Cl2 molecules are held together by dispersion forces.
CH3CH2OCH2CH3 and CH3CN are polar molecules held together by dipole-dipole forces.
10. A gas sample that has a mass of 6g occupies 400 mL at 504°C and a pressure of 600 mm Hg. Calculate the gas’s density at STP.
Answers
Answer:
51 g/mol
Explanation:
Whenever you see molar masses in gas law questions, more often than not density will be involved. This question is no different. To solve this, however, we will first need to play with the combined ideal gas equation PV=nRT to make it work for density and molar mass. The derivation is simple but for the sake of time and space, I will skip it. Hence, just take my word for it that you will end up with the equation:
calculate the number of moles
for 66 gram of CO2
Answers
Answer:
1.55
Explanation:
The number of moles = given mass / molar mass
The given mass is 66 g and the molar mass is 44 g/molar mass
Substituting the values in, we get that:
the number of moles = 66/44
the number of moles = 1.55
hope this helped!
This is Q7 and I need help, can someone help.
Answers
Answer:
Answer to A. helium, neon, argon, krypton, xenon, and radon, B. Elemental hydrogen (H, element 1), nitrogen (N, element 7), oxygen (O, element 8), fluorine (F, element 9), and chlorine (Cl, element 17) are all gases at room temperature, and are found as diatomic molecules (H2, N2, O2, F2, Cl2). C. Elements Compounds
Ar (argon) HBr (hydrogen bromide) C 3H 8 (propane)
Kr (krypton) HI (hydrogen iodide) C 4H 10 (butane)
Xe (xenon) HCN (hydrogen cyanide)* CO (carbon monoxide)
Rn (radon) H 2S (hydrogen sulfide) CO 2 (carbon dioxide)
Explanation:
.Which statement about transition elements is correct?A Their soluble salts usually form coloured aqueous solutions. B They are all in the same group of the Periodic Table. C They are non-metals with high melting points. D They can be mixed together to form compounds
Answers
Answer:
A Their soluble salts usually form coloured aqueous solutions
The top layer of a flat lying sedimentary rock is the…
most eroded
most under formed
oldest
youngest
Answers
youngest
hope this helps anyone<3
Answer:
The answer is youngest.
Explanation:
I need help with this one please it’s science
Answers
Answer: A change in appearance. (Please say thanks!)
Explanation:
The biggest sign of a chemical change is change in appearance.
Answer:
d
Explanation:
1-Are natural resources renewable or nonrenewable?
2-what is the only way to stop the depletion of natural resources?
3-What is an example of poor soil management?
Answers
Answer:
1- Natural sources are renewable with time
2- To refrain from over usage of products on unnecessary things
3- An example of poor soil management is using the soil with the most minerals to put houses on instead of farming with
4) How does an atom have a charge of -3?
Answers
Answer:
When the electrons hit the atoms in the chamber, they cause some of the electrons in the atoms to be stripped or knocked away. ... When one or more electrons is knocked off of an atom, it becomes positively charged. It is now an positive ion. A negative ion can be made by adding an electron to an atom.
Explanation:
Who knows the answer to this please help
Answers
Janet is sliding a box across the floor what does she need to know to calculate the force on a box?
Answers
Answer:
She needs to know the Mass and acceleration
Janet needs to know the mass of the box and acceleration .
What is force?Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.
It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.
The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.
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