Answer:
3 g/cm3
Explanation:
d=m/v
=45/15
= 3 g/cm3
Answer:
2.46621 cm
Explanation:
i used the formula p = m/V
Use the periodic table to determine the charge of the ions below. Select the correct answer from the drop-down menus.
A lithium ion has a charge of ______
A calcium ion has a charge of _______
An aluminum ion has a charge of ______
A fluorine ion has a charge of _______
An oxygen ion has a charge of ________
Answer:
A lithium ion has a charge of +1.
A calcium ion has a charge of +2.
An aluminum ion has a charge of +3.
A fluorine ion has a charge of -1.
An oxygen ion has a charge of -2.
Below, the correct charges of the elements are listed;
A lithium ion has a charge of +1 A calcium ion has a charge of +2 An aluminum ion has a charge of +3 A fluorine ion has a charge of -1 An oxygen ion has a charge of -2The ionic or electrical charge of an element is the new state the element acquires because of losing or gaining an electron.
When elements lose their electrons, they tend to attain a positive charge and when they gain an electron, they tend to acquire a negative charge. To easily identify the charge of the ions, the periodic table should be used.
Elements (metals) found on the left side of the periodic table tend to have a positive charge while elements (non-metals) on the right side of the table usually assume a negative charge.
Learn more here:
https://brainly.com/question/18734103
NEED ANSWER FAST✴️✴️✴️✴️
What do phytoplankton do for the carbon cycle? Choose all that apply.
A. They take in oxygen for photosynthesis.
B. They take in carbon dioxide for photosynthesis.
C. When they die, the carbon left in them can be sequestered (stored) in the ocean bottom.
D. They are food for many animals, including some whales.
Plz help! The best answer will be marked as brainliest!
Make a funny sentence for flammability and compounds for Magnesium
Here is an example for Mercury, it HAS to for Magnesium
“I love to travel but I do corrode aluminum so we won’t be flying off on adventures in airplanes planes anytime soon”
Answer:
I literally just answered this question
Explanation:
Give me a brainliest
6) What types of atomic orbitals are in the third principal energy
level?
C A sand p only
B. p and d only
CC. s, p, and d only
CD. s.p. d, and f
Answer:
Types of atomic orbitals present in the third principal energy are s, p and d only .
Explanation:
OPTION A-: s and p atomic orbitals - these two orbitals are present in second principal energy level. Therefore , the option is incorrect. OPTION B-: p and d only - This option is wrong as there is no such principal level energy where , s atomic orbital is absent .OPTION C-: s , p and d only -these orbitals are present in third principal energy level. The third major level of energy has one orbital, three orbitals of p, and five orbitals of d, each of which can contain up to 10 electrons. The third stage thus holds a maximum of 18 electrons. This option is correct .OPTION D-: s , p, d and f only -There is also a f sublevel at the fourth and higher stages, containing seven f orbitals, which can accommodate up to 14 electrons at most. Therefore, up to 32 electrons will hold the fourth level: 2 in the s orbital, 6 in the three p orbitals, 10 in the five d orbitals, and 14 in the seven f orbitals. This option is incorrect .Thus , the correct option is C (s , p and d only .)
Answer:
s, p, and d
Explanation:
what is the diference between weather. and climate
Answer:Whereas weather refers to short-term changes in the atmosphere, climate describes what the weather is like over a long period of time in a specific area. Different regions can have different climates. ... Weather tells you what to wear each day. Climate tells you what types of clothes to have in your closet.
Explanation:well bc i am in 10th grade this kinda easy lol hoped i helped
Answer:
Explanation:
Weather is the current state of weather while, climate is the most common weather of that region over a time of 30 years.
limestone is a common building block used in texas and is a type of rock that forms in shallow marine settings due to selective precipitation some of the dissolved ions present in the marine setting are sodium potassium calcium nitrate chloride carbonate which ions form limestone
Answer:
Ca^+ and CO3^2-
Explanation:
Limestone is CaCO3. It is an important component of the shell of many species that have shells.
Limestone contains th calcium ion (Ca^+) and the carbonate ion (CO3^2-).
Limestone is used as a building material. It is usually mined as deposits below the ground.
In an ionic compound, the size of the ions affects the internuclear distance (the distance between the centers of adjacent ions), which affects lattice energy (a measure of the attractive force holding those ions together). Based on ion sizes, arrange these compounds by their expected lattice energy. Note that many sources define lattice energies as negative values. Please arrange by magnitude and ignore the sign. ∣∣lattice energy∣∣=absolute value of the lattice energy Na2S, K2S Cs2S Li2S
Answer:
Li2S> Na2S> K2S> CsS
Explanation:
The lattice energy of ionic species depends on the relative sizes of ions in the ionic compounds. As the size of ions increases, the lattice energy decreases and vice versa.
When the size of the anions are the same, the lattice energy now depends on the relative sizes of the cations. Therefore, since all the compounds are sulphides and the order of magnitude of ionic sizes is: Li^+ < Na^+ < K^+ < Cs^+.
Therefore, the order of decrease in lattice energy is; Li2S> Na2S> K2S> CsS
State two function of blood in our
body?
Answer:
transporting oxygen and nutrients to the lungs and tissues
forming blood clots to prevent excess blood loss
carrying cells and antibodies that fight infection
Explanation:
.......(◍•ᴗ•◍).......
A graduated cylinder is filled with 50.7 mL of water. If a 10.0 g piece of zinc metal is added to the water, and the volume rises to 52.1 mL, what is the density of the metal?
Answer:
The answer is 7.14 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 10 g
volume = final volume of water - initial volume of water
volume = 52.1 - 50.7 = 1.4 mL
We have
[tex]density = \frac{10}{1.4} \\ = 7.142857...[/tex]
We have the final answer as
7.14 g/mLHope this helps you
The people on this website are the only reason I'm passing!
N e ways, help?
A sample of oxygen gas at STP is depicted in the diagram in the picture (4) of the image attached.
What is an oxygen molecule?An oxygen molecule is a diatomic molecule, which is a molecule made up of just two atoms of the same element. The oxygen molecule in this instance is made up of two oxygen atoms.
If you have a lot of oxygen atoms at STP, they will spontaneously combine to produce O₂ because double bonds between oxygen atoms make their structure more stable.
If we carefully examine the figure in the attached image, we will see that it depicts a molecule made up of two atoms of the same element, which perfectly matches the definition of the oxygen molecule.
Therefore, this is shown in diagram (4), spontaneously combine to produce O₂ because double bonds between oxygen atoms make their structure more stable.
Learn more about molecules, here:
https://brainly.com/question/19499760
#SPJ2
Which of the following resources carries a high potential for environmental damage
A:wind
B:trees
C:geothermal
D:nuclear
Answer:
Nuclear
Explanation:
Nuclear is a un-natural and newer type of energy source that can spread lethal toxins into the air causing living things to die. On top of that is it sometimes very unstable and sometimes if it's not disposed correctly it can cause high levels of radiation.
Find the number of moles of 49.0 grams of H3PO4
Given parameters:
Mass of H₃PO₄ = 49g
Unknown:
Number of moles = ?
Solution:
To find the number of moles of a given specie;
number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass = 3(1) + 31 + 4(16) = 98g/mol
Input the parameters and solve;
Number of moles = [tex]\frac{49}{98}[/tex] = 0.5mole
The number of moles is 0.5mole
Count the number of electrons in the innermost shell for helium, chlorine and potassium. How
many are there?
Answer:
Helium is 2 electrons
Chlorine is 7 electrons
Potassium is 1 electron
and also Potassium is going to give chlorine an electron and do ionic bonding because chlorine is missing one electron and potassium has only 1 electron in valence
Explanation:
Outermost shell is the outermost ring so just count black dots on there for each one
What is the movement of particles in gas?
Answer:
The movement is random
Explanation:
Typically, water runs through the baseboard copper tubing and, therefore, fresh hot water is constantly running through the piping. However, consider a pipe where water was allowed to sit in the pipe. The hot water cools as it sits in the pipe. What is the temprature change, (ΔT), of the water if 210.0 g of water sat in the copper pipe from part A, releasing 3178 J of energy to the pipe? The specific heat of water is 4.184 (J/g)⋅∘C.
Answer:
-3.617 °C
Explanation:
Step 1: Given data
Mass of water (m): 210.0 g
Energy released in the form of heat (Q): -3178 J (the minus sign corresponds to energy being released)
Specific heat of water (c): 4.184 J/g.°C
Temperature change (ΔT): ?
Step 2: Calculate the temperature change
We will use the following expression.
Q = c × m × ΔT
-3178 J = 4.184 J/g.°C × 210.0 g × ΔT
ΔT = -3.617 °C
Do you know when the transfer of heat/thermal energy has ended
A chemical reaction takes place to allow instant cold packs to absorb energy. This is an example of a(n) __________.
A. physical change
B. exothermic reaction
C. endothermic reaction
D. precipitate
Answer:
c. Endothermic
Explanation:
endothermic reactions absorb heat, exothermic reactions release heat.
Which element has a greater atomic radius? Fluorine or Potassium
Answer:
An atom is a basic unit of a chemical element, such as hydrogen, helium ... a fluorine atom since the three additional protons the fluorine has will pull its ... As an example, potassium (K) has a larger average atomic radius (
A student was performing a series of experiments to verify the density of a liquid. The table shows the results of four experiments. Which of these statements is correct?
Experiment No. Density (g/cc)
1 0.70
2 0.81
3 0.80
4 0.81
A) The mean of the data is 0.7.
B) The mean of the data is 0.8.
C) The median of the data is 0.70.
D) The median of the data is 0.81.
Answer:
0.8
Explanation:
since when you add them up you get 3.12 and divide it you get 0.78. Round and you will get 0.8
Name two test substances that would react with each other to produce water and salt
What directions do periods go on a periodic table
Answer:
left to right
The periods go on a periodic table, left to right. The periodic table is the systematic arrangement of elements in row and column.
What is a periodic table ?The chemical elements are arranged in rows and columns in the periodic table, sometimes referred to as the periodic table of the elements. It is often used in physics, chemistry, and other disciplines, and is frequently regarded as a symbol of chemistry.
Because of the orderly arrangement of the elements, it is known as the periodic table. Periods refers to the horizontal rows, and Groups to the vertical columns.
The most significant role of hydrogen in the human body is to maintain your level of hydration, making it the most significant element on the periodic table.
All known elements are grouped together in the periodic table of elements into groups with related characteristics. It becomes a crucial tool for chemists, nanotechnologies, and other scientists as a result. You can forecast how chemicals will behave if you learn to utilize and comprehend the periodic table.
Thus, The periods go on a periodic table, left to right.
To learn more about periodic table, follow the link;
https://brainly.com/question/11155928
#SPJ6
5. Why does saliva production in the mouth decrease demineralization?
How many protons, neutrons, and electrons does the atom above have?
-12 protons, 7 neutrons, 1 electron
-7 protons, 12 neutrons, 1 electron
-12 protons, 5 neutrons, 7 electrons
-7 protons, 5 neutrons, 8 electrons
-7 protons, 5 neutrons, 1 electron
-7 protons, 12 neutrons, 8 electrons
-5 protons, 7 neutrons, 8 electrons
Answer:
Nitrogen has 7 protons, 7 neutrons, and 7 electrons.
So, I'm not entirely sure about the choices you provided :)
how many significant figures in 368.1371 ?
Assess It!
#4
Which two elements are
most likely to bond with
each other?
A. Oxygen and Boron
B. Nitrogen and 3 atoms of
Hydrogen
C. Chlorine and Calcium
D. Neon and Sodium
Answer:
c
Explanation:
i hope this helps
The two chemical elements that are most likely to bond with each other are: C. Chlorine and Calcium.
A chemical bond refers to the forces of attraction existing between ions, crystals, atoms or molecules and that are typically responsible for the formation of new chemical compounds.
In Chemistry, there are three (3) main types of chemical bonds and these are:
I. Hydrogen bonds.
II. Covalent bonds.
III. Ionic bonds.
An ionic bond can be defined as a chemical bond which involves a metallic element transferring one or more electrons to a non-metallic element.
In this scenario, the element Chlorine which have seven valence electrons would accept an electron from Calcium (Alkali metal) to form a chemical compound called calcium chloride.
In conclusion, two chemical elements that are most likely to bond with each other by forming an ionic bond are Chlorine and Calcium.
Read more: https://brainly.com/question/24605723
Please answer correctly..
will give the brainliest!
Urgent!!!!!!
Compound Lattice Energy (kJ/mol) Compound Lattice Energy (kJ/mol) LiF 1030 NaCl 788 LiCl 834 MgCl2 2326 LiI 730 AlCl3 5376 Lattice Energy 1 Lattice Energy 2 For the lattice energies given above … in Lattice Energy 1, explain why LiF has a greater lattice energy than LiI in Lattice Energy 2, explain why NaCl has a smaller lattice energy than AlCl3
Answer:
The lattice energy decreases down the group and increases across the period, therefore, the lattice energy of LiF > lattice energy of LiI, and the lattice energy of NaCl < the lattice energy of AlCl₃
Explanation:
The given parameters are;
Compound [tex]{}[/tex] Lattice Energy (kJ/mol)
LiF [tex]{}[/tex] 1030
NaCl [tex]{}[/tex] 788
MgCl₂ [tex]{}[/tex] 2326
LiI [tex]{}[/tex] 730
AlCl₃ [tex]{}[/tex] 5376
Lattice is the energy that must be added in order to split one mole of a ionic solid compound into gaseous ions
Given that the force of attraction between charges is inversely proportional to the square of the distance separating the charges, we have that as the atomic radius increases progressively down the group, the lattice energy decreases, therefore, LiF which has a shorter inter nuclear distance than LiI due to fluorine, F, being higher up on the periodic table than iodine, I, has a greater lattice energy than LiI
Similarly, given that the atomic radius decreases across the period, and that sodium, Na, comes before aluminum, Al, as we move across period 3, of the periodic table, the inter nuclear distance between atoms of in NaCl is larger than the internuclear distances between the atoms of AlCl₃, as well as the presence of more chlorine atoms in AlCl₃ than in NaCl, the lattice energy of NaCl is smaller than the lattice energy of AlCl₃.
Fill in the [?]: 12,341 us = [?] S
Suppose 50.0 grams of compound AB reacts completely with 100.0 grams of compound CD, how many grams of products will be formed, according to the Law of Conservation of Matter?
a. 50
b. 100
c. 150
d. 200
Answer:
Option C = 150
Explanation:
First of all we will understand what is law of conservation of mass.
Law of conservation of mass:
This law stated that, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
In given photosynthesis reaction:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
there are six number of carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of chemical equation so this reaction followed the law of conservation of mass because mases are same on both side.
In given chemical reaction:
AB + CD → X
50 g + 100 g = 150 g
Thus option c is correct.
period 6, group 12 (2B)
Answer:
mercury or Hg
Explanation:
i looked at the periodic table haha
hope this helps and is right <3