Answer:
I think it is either a or b
Explanation:
c or d has the correct names and Roman numerals.
.
Characteristics of a Group of Elements
Do not conduct electricity
• Mostly gas, but brittle when solid
Has 7 valence electrons
.
Which of these elements is in this groun?
Answer:
Gas
Explanation:
I dunno but a lucky guess i guess
Need help ASAP DUE IN LIKE 2 minutes!!!!!!! Points are added
Proton:
Positive
Found in Nucleus
Mass of 1 AMU
Neutron:
Neutral
Found in Nucleus
Mass of 1 AMU
Electron:
Negative
Found in orbitals
Mass of 0 AMU
Please mark Brainliest if this helped you! :)
What is the molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution?
Answer: the answer is 12M
Explanation: 3.0mol/ 0.25L =12M
12M is the molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution.
What is molarity?The amount of molecules of molecules divided by the quantity of liters in solution is the definition of molarity, a concentration unit in chemistry. It is crucial to comprehend how it is calculated as well as when to employ it in comparison to other units because it is among the most widely used concentration units.
A chemical solution's concentration is measured in molarity (M). It refers to the solute's moles per liter of solution. To be clear, this is not the same as the liters of solvents (a common mistake).
molarity = number of moles of solute/ volume of solution in litre
molarity =3.0mol/ 0.25L
=12M
Therefore, 12M is the molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution.
To know more about molarity, here:
https://brainly.com/question/29884686
#SPJ2
2KClO₃ → 2KCl + 3O₂ If 25.0 g of KClO₃ decompose, what mass of O₂ will form? *
Answer: approximately 15.1 grams.
Explanation: The key to chemistry is to change everything to moles. Then when you have the answer in moles change the answer back to grams, liters, or whatever you want. Change 25 grams of potassium chlorate to moles. Chlorate is Cl with 3 oxygens. ate = saturated. Chlorine has seven valance electrons when it is saturated six of these electrons are used by oxygen ( 2 electrons per oxygen) leaving only 1 electron. 1 K x 39 grams/mole+1 Cl x 35.4grams/ mole+3 O x 16 grams/ mole = 122.4 grams / mole Potassium Chlorate 25 122.4 = moles. 2.05 moles of Potassium Chlorate. There is a 1:1 mole ratio. 1 mole of Potassium Chlorate will produce 1 mole of Potassium Chloride. 2.05 moles of Potassium Chlorate will produce 2.05 moles of Potassium Chloride. Find the gram molecular mass of Potassium Chloride. 1 K x 39 = 39+1 Cl x 35.4 = 35.4 = 74.4 grams / mole. 2.05 moles x 74.4 grams/ mole = 15.2 grams
The mass of O₂ that will be form is 9.8 grams
The chemical reaction is as follows:
2KClO₃ → 2KCl + 3O₂
From the reaction 2 moles of potassium trichlorate decompose to form 2 moles of potassium chloride and 3 moles of oxygen.
Therefore,
molar mass of KClO₃ = 39 + 35.5 + 48 = 122.5 grams
molar mass of O₂ = 32 grams
Therefore,
2(122.5) g of KClO₃ produces 3(32) grams of O₂
25 g of KClO₃ will produce ? grams of O₂
cross multiply
mass of O₂ produced = 96 × 25 / 245
mass of O₂ produced = 2400 / 245
mass of O₂ produced = 9.7959
mass of O₂ produced ≈ 9.8 grams
learn more: https://brainly.com/question/15568949?referrer=searchResults
Why is there no answer
Answer:
i don't know
Explanation:
How are beef and gas productions related to methane levels?
Plzzz answer quick
Answer:
Cows and other ruminant animals (like goats and sheep) emit methane, a potent greenhouse gas, as they digest grasses and plants. This process is called “enteric fermentation,” and it's the origin of cows' burps.
Explanation:
A Jeweler is making sapphire rings using 2 sapphires on every 1 ring. If the jeweler has 12 sapphires and 10 rings, what is the theoretical yield? (3 points)
O 5 sapphire rings
O 6 sapphire rings
O 10 sapphire rings
O 12 sapphire rings
3 (05 05 LC)
The theoretical yield is 6 sapphire rings.
What is Theoretical yield?This is the total product formed as a result of the complete conversion of
the reactants. In this scenario, the reactant is the 12 sapphires in which 2
of it is needed to produce one sapphire ring.
This however translates to the theoretical yield being 6 sapphire rings
which is gotten by:
2 sapphires = 1 ring
12 sapphires = x
Cross multiply
2x = 12
x= 12/2 = 6 sapphire rings.
Read more about Theoretical yield here https://brainly.com/question/25996347
Select the most reactive metal from the options below
Iron
Copper
Zinc
Gold
Answer: Hello, This is my most favorite class so I know this is right.
The most Reactive metal source is Copper.
Explanation:
This is the most reactive because it contains Lithium supplement.
Your Welcome! Mark me as Brainliest! :)
Temperature is a measurement of :
1) total energy in a system
2) the average kinetic energy of a system
3) the average potential energy of a system
4) the ability to do work
Answer:
Temperature is a measure of the average kinetic energy of the particles in an object. When temperature increases, the motion of these particles also increases. (That should give you the answer if you read closely first sentence)
Most of the deserts on the Earth are located around 30°N & 30°S latitude. This is because air is ( rising / sinking ) at these locations.
Answer: We live at the bottom of a gaseous envelope the atmosphere--that is bound gravity to the planet Earth. The circulation of our atmosphere is a complex process because of the Earth's rotation and the tilt of its axis. The Earth's axis is inclined 23.5° from the ecliptic, the plane of the Earth's orbit around the Sun. Due to this inclination, vertical rays of the Sun strike 23.5° N. latitude, the Tropic of Cancer, at summer solstice in late June. At winter solstice, the vertical rays strike 23.5° S. Latitude, the Tropic of Capricorn. In the Northern Hemisphere, the summer solstice day has the most daylight hours, and the winter solstice has the fewest daylight hours each year. The tilt of the axis allows differential heating of the Earth's surface, which causes seasonal changes in the global circulation. On a planetary scale, the circulation of air between the hot Equator and the cold North and South Poles creates pressure belts that influence weather. Air warmed by the Sun rises at the Equator, cools as it moves toward the poles, descends as cold air over the poles, and warms again as it moves over the surface of the Earth toward the Equator. This simple pattern of atmospheric convection.
Multiple choice
In a given chemical reaction, 1 mol of sulfur reacts with 4 moles of chlorine.
4S + 2Cl2
S + 4 Cl2
S + 2Cl2
S + Cl2
Answer:
S + 4 Cl2
Explanation:
Sulphur - S
1 mol of Sulphur = S
Chlorine = Cl2
4 moles of Chlorine = 4Cl2
4S + 2Cl2
Incorrect option
S + 4 Cl2
Correct option
S + 2Cl2
Incorrect option
S + Cl2
Incorrect option
Can somebody just name all the metalloids, gases, and liquids that are on the periodic table. please this is due in a hour!!!
Answer:
There are six liquid elements present in the periodic table. They are bromine,mercury ,caesium,gallium,rubidium and francium.
The metalloids; boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At) are the elements found along the step like line between metals and non-metals of the periodic table.
The gaseous element group; hydrogen (H), nitogen (N), oxygen (O), fluorine (F), chlorine (Cl) and noble gases helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn) are gases at standard temperature and pressure (STP).
Explanation:
13 Consider this neutralization reaction.
H2SO4 + 2KOH → K2SO4 + 2HOH
Which compound is the salt produced in this
reaction?
(1) KOH
(2) H2SO4
(3) K2SO4
(4) HOH
Explanation:
The answer to the question is (3) K2SO4
Which states of matter change shape when moved? Which states of matter change shape when moved?
Answer:
Gas and Liquids
Explanation:
Why would the presence of oxygen bubbles be a good indicator of photosynthesis occurring?
kdjsbjsof in bwjfiejwnjfifihdhwhbsd
match each scientist with the description of the appropriate atomic theory
Bohr: Electrons move in circular paths that have different energies.
Thomson: Atoms contain electrons.
Dalton: Matter is made up of indivisible atoms.
Schrodinger and others: Electrons exist in a cloud of probability.
Rutherford: The mass of an atom is concentrated in its center.
Answer:
The screenshot shows all the answers
Explanation:
3Ba(C2H3O2)2 + 2K3PO4 ⟶ Ba3(PO4)2 + 6KC2H3O2
If 4.36 mol of potassium phosphate react, how many grams of barium phosphate are produced?
Hello Mistyann!
First you need to know amount of barium phosphate is
Half of potassium phosphate, also 2.18 mol.
Molar mass of Barium phosphate is 3·137.2 + 2·(30.97+4·16) g/mol
You can calculate it yourself dear.
Now mass is amount of substance · molar mass.
It has been an honour to teach you, dear,
God bless!
How do I do nunber 8?
Answer:
DONT CLICK THAT LINK THAT IS HACK AND VIRUS
Explanation:
how many protons electrons and neutrons does the following isotopes contain 1H+
Answer:
The other name for this isotope is a proton. This is because it contains just a single proton.
Explanation:
H+
Protons = 1
Electrons = 1 - 1 = 0 (The + sign means it has lost a single electron)
Neutrons = 0
What is the mass of water released by the heating? Show your work or explain your reasoning.
Answer:
Dividing the mass of the water lost by the original mass of hydrate used is equal to the fraction of water in the compound. Multiplying this fraction by 100 gives the percent water in the hydrate.
Explanation:
The amount of water throughout the compound has been determined by dividing the mass of water wasted mostly by original quantity of hydrate used. The above fraction can be multiplied by 100 to get the hydrate's water content in percentages.
What is mass ?The proportion of matter that makes up an object is quantified by its mass. The kilogram, or kg, would be the fundamental SI unit of mass.
What is hydrate?Any substance that contains water through the form of H2O molecules is referred to as a hydrate. This water content by weight can vary, but it is typically fixed. The most well-known hydrates seem to be crystalline solids which decompose once the attached water is removed.
Therefore , The amount of water throughout the compound has been determined by dividing the mass of water wasted mostly by original quantity of hydrate used. The above fraction can be multiplied by 100 to get the hydrate's water content in percentages.
To know more about mass and hydrate.
https://brainly.com/question/11202174
#SPJ3
Newtons law of motion
PLEASE HELP I WILL MARK YOU BRAINLIEST !!If you react 4.25 moles of FeCl2, how many moles of Cl2 did you also react?
PLEASE IM BEGGING FOR HELPPPPP
Answer:
2 FeCl2 + Cl2 -> 2 FeCl3
According to numbers in reaction
Amount of Cl2 is half of FeCl2
Explanation:
How many molecules are in 32.4 L KOH?
Hey there!!!!!!!!!!!!!!!!!!!!!!!
1. Explain where they bury remains at the Forensic Osteological Research Center and why
Answer:
In the middle of the forest.
Explanation:
They have to bury the remains in the middle of the forest at the Forensic Osteological Research Center in order to study the decomposition of the dead person. By studying the decomposition of dead person we can get a lot of information which can be used in the study of criminal cases and solving of crimes. The middle place in the forest is a perfect place to bury the remains due to presence of huge amount of microbes as well as insect that helps in the decomposition.
Which organ detects stimuli from the environment and is part of the nervous system?
Group of answer choices
A. eye
B. stomach
C. heart
D. lungs
It's the eye because it's the organ of sight
iron and carbon:steel:copper and tin:___________
Answer:
iron and carbon:steel:copper and tin: metal
4) What mass of hydrogen is formed when 2.00g of magnesium
Mg + H2SO4–>H2SO4
Answer: 0.16 g H2
Explanation:
Mg+ H2SO4= MgSO4 + H2
Atomic massof Mg is 24
Molecular mass of H2 is 2
So,
24g Mg produce 2 g H2
1g Mg produce (2÷24)= 0.083 g H2
2.00g Mg produce (0.083×2) g H2
= 0.16 g H2
0.16g of hydrogen is formed when 2.00g of magnesium.
The mass of hydrogen gas formed when 2.00g of magnesium is equal to 0.165 g.
What is the balanced chemical equation?The chemical equation of a reaction is said to be a balanced equation when the number of atoms of substances is equal on either side of the equation.
Evergy balanced chemical equation must follow the law of conservation of mass according to which the total mass of the substances present on the reactant side should be equal to the total mass of substances present on the product side.
Given, the balanced chemical equation of the reaction of Mg and sulfuric acid:
[tex]Mg + H_2SO_4 \longrightarrow MgSO_4 +H_2[/tex]
One mole of magnesium produces hydrogen gas = 1mol
Given the mass of magnesium = 2g
The number of moles of Mg = 2/24.3 = 0.082 mol
Then the number of moles of hydrogen gas formed = 0.082 mol
The mass of the hydrogen gas = 0.082 × 2 = 0.165 g
Learn more about the balanced chemical equation, here:
brainly.com/question/15052184
#SPJ2
help meeeeeeeeeeeeee
Answer:
XCl₂ + 2AgNO₃ —> X(NO₃)₂ + 2AgCl
The coefficients are: 1, 2, 1, 2
Explanation:
XCl₂ + AgNO₃ —> X(NO₃)₂ + AgCl
The equation can be balance as follow:
XCl₂ + AgNO₃ —> X(NO₃)₂ + AgCl
There are 2 atoms of Cl on the left side and 1 atom on the right side. It can be balance by writing 2 before AgCl as shown below:
XCl₂ + AgNO₃ —> X(NO₃)₂ + 2AgCl
There are 2 atoms of Ag on the right side and 1 atom on the left side. It can be balance by writing 2 before AgNO₃ as shown below:
XCl₂ + 2AgNO₃ —> X(NO₃)₂ + 2AgCl
Now, the equation is balanced.
The coefficients are: 1, 2, 1, 2
6) Which type of orbital is represented by this image?"
Z,Y,X
Answer:
the immage is not uploaded
HELP ITS DUE IN AN HOUR!!
What is a lattice position?
Explain
Explanation:
Crystallography. an arrangement in space of isolated points (lattice points ) in a regular pattern, showing the positions of atoms, molecules, or ions in the structure of a crystal.
If an atom experiences sufficient thermal activation, it can move to a neighboring lattice position.4 If the vibration frequency of the atom is v and the atom has Z nearest neighbors, the total number of jump attempts is vZ. However, only a small fraction of the attempts will be successful, with a probability depending on the ratio between the necessary activation energy for a single jump QD and the thermal activation kBT. The effective jump frequency ΓD is then
(5.6)
With each successful jump, the atom travels one atomic distance λ and the total traveling distance in unit time is thus ΓDλ. Substituting the jump frequency ΓD into the expression for the root mean square displacement of a random walker [equation (5.5)] and using the spatial coordinate r leads to