3 moles of hydrogen gas (H2) will be produced If sufficient hydrochloric acid is used to react completely with 72.9 g of magnesium.
The chemical reaction described in the question is represented in the following equation:Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)According to this equation, 1 mole of magnesium produces 1 mol of hydrogen gas. First, we convert 72.9g of Mg to moles using the following formula:moles of Mg = 72.9g ÷ 24.3g/molmoles of Mg = 3 molIf 1 mole of magnesium produces 1 mol of hydrogen gas. Therefore, 3 moles of Mg will produce 3 moles of hydrogen gas.Learn more: https://brainly.com/question/14919968?referrer=searchResults
When electrons are shared between atoms, a covalent bond is formed
True
False
Answer:
true
Explanation:
ionic transfer of e^- ions formed (charges)
ionic=non-metal+ metal
ex: F+Ca
covalent sharing e^- no true charges
covalent= non-metal+ non-metal
ex: F+P
( my notes)
Summarize how C-14 and U-238 dating together can be used to determine fossil ages.
Answer:
Uranium 238 is only found in igneous or volcanic rocks. So no fossils can be dated directly using U 238.
Because of the huge differences in the half lives of Carbon 14 and Uranium238 they cannot be used together. Carbon 14 can only be used to date fossils of a very recent age. Uranium 238 can only be used to date volcanic rocks of a very old age.
Explanation:
what type of bonds exists between neighboring water molecules?
Answer:
covalent bonds
Explanation:
1
Which of the following is harmful to natural resources?
A pollution
B
conserving natural resources
C recycling
what is Density?:
the mass of an object
the volume of 1 unit of mass. (e.g. the volume of 1 g)
the mass of 1 unit of volume. (e.g. the mass of 1 cm3)
the volume of an object
Answer:
Density is defined as how tightly or loosely packed a substance is, or to the number of things or people in a certain area.
What is H2O (water) classified as? Question 4 options: a molecule an atom an element a diatomic molecule
Answer:
its classified as a molecule
What is the difference between an aqueous solution and a liquid (simple definition)
Answer:
The primary distinction between liquid and aqueous is that liquid refers to any fluid that is almost incompressible, whereas aqueous refers to liquids that contain water as the solvent.
Explanation:
which method would be best for separating the components of a mixture
Answer:
A
Explanation:
Evaporation It would become a crystal
What situations might you encounter?
Please it is for my assessment please could you give me 6 answer please
2. Write the charge of each sub-atomic particle in the helium atom above.
Explanation:
The charge of a helium atom is zero
It is neutral because
The number of unit negative charges = number of unit positive charges
One unit negative charge = -1.6 x 10^(-19) which is basically the charge of an electron
One unit positive charge = +1.6 x 10^(-19) which is basically the charge of a proton
A helium atom has 2 protons and 2 electrons, so it is neutral
NOTE: an alpha-particle (He2+) is a charged helium atom it has 2 protons and 0 electrons. Charge of an alpha particle = +3.2 x 10^(-19).
What statement most likely describes the effects of this movement at each location?
Location A creates a volcano; Location B uplifts and forms a mountain
Location A uplifts and forms a mountain; Location B creates a volcano
Location A creates a gap allowing molten material to seep through; Location B melts and recycles the crust
Location A melts and recycles the crust; Location B creates new ocean crust
Answer:
C hope it helps
Explanation:
Answer:
location A creates a volcano
Explanation:
mark as brainliest
1. What allowed fusion reactions to take place in the early universe?
Answer:
Nuclear fusion in stars converts hydrogen into helium in all stars
nitrates, turbidity and acidity. Whichwater sample was likely runoff from a farm?
Answer:
What is the most likely source of nitrogen in runoff? Fossil fuel emissions.
What law does a balanced chemical equation demonstrate?
Answer:
The law of conservation of mass
Explanation:
A chemical equation is an expression of the net composition change associated with a chemical reaction. It shows how a certain amount of reactants yields a certain amount of products. Both of these amounts are measured in moles. Chemical equations often contain information about the state of the reactants: solid, liquid, gas, or aqueous. In addition, they always adhere to the law of conservation of mass, which holds that matter can change form, but cannot be created or destroyed.
The Lithium atom has only two energy levels. The third is empty. Therefore, we can refer to the second energy level of the lithium atom as the outermost level. The electrons in this outermost energy level are called valence electrons. Refer to the table you just constructed, and determine the number of valence electrons for the first 18 elements. Fill in the table with the identified number of valence electrons
Type the correct answer in each box. Use numerals instead of words.
Answer:
H=1
Li=1
Na=1
Be=2
Mg=2
B=3
Al=3
C=4
Si=4
N=5
P=5
O=6
S=6
F=7
Cl=7
Ne=8
Ar=8
He=8
Explanation:
Answer:
The person above me got one wrong
Explanation:
please help!! i do NOT understand chemsitry at all
Answer:
pretty sure there is a calculator
Explanation:
there is a calculator for it ( that's what I do ) btw there is a calculator for every even science or chemistry
Lighting a match is an example of what kind of energy conversion?
A. Chemical potential energy being converted to heat energy
B. Chemical potential energy being converted to kinetic energy
C. Gravitational potential energy being converted to heat energy
D. Kinetic energy being converted to chemical potential energy
Answer:
Mechanical Energy to Thermal Energy
When you strike a match, it moves through the air until it rubs against a surface. The rubbing produces the heat required to light the match. This is a transformation from mechanical energy to thermal (heat) energy.
Explanation:
Answer:
A is the answer.
Explanation:
Which of the following makes its own food using energy from the sun? *
Green algae
Tress
Sunflowers
Answer: All of the above
Explanation:
All of the options are producers, meaning they make their own food from sunlight through the process of photosynthesis.
Which of the following atoms will have the
most similar properties to the atom shown
below
Answer: IV
Explanation:
Atoms with the same number of valence electrons (in this case 2) will have similar chemical properties.
wich group was the control group? The experimental group?
Answer:looks spicy
Explanation:what are you asking
Read the description of each element, then write its name and symbol
A) This non-gaseous and reactive metal belongs to group 16
B) This element has an atomic number of 42
C) This metal has an atomic mass of about 56
D) This Group 2 metal is in the sixth period
E) This metal element is liquid at room temperature
F) This is the lightest element of the second period
G) This element has a valence electron and six electronic layers
H) This element has a mass number of 184
I) This element has seven valence electrons and is in the fifth period
J) This element has four electronic layers and its outer layer is full
Answer:
Diatomic carbon (systematically named dicarbon and 1λ2,2λ2-ethene), is a green, gaseous inorganic chemical with the chemical formula C=C (also written [C2] or C2). It is kinetically unstable at ambient temperature and pressure, being removed through autopolymerisation. It occurs in carbon vapor, for example in electric arcs; in comets, stellar atmospheres, and the interstellar medium; and in blue hydrocarbon flames.[1] Diatomic carbon is the second simplest form of carbon after atomic carbon, and is an intermediate participator in the genesis of fullerenes.
Explanation:
I need help on this one too
Answer:
The answer option which best describes nuclear fission is: C. A nucleus collides with a neutron and splits, releasing energy.
A nuclear reaction can be defined as a type of reaction in which the nucleus of an atom is transformed by either being joined (fusion) or split (fission) with the nucleus of another atom of a radioactive element and accompanied by a release of energy.
Explanation:
NEED AN ANSWER FROM K12 MUST HAVE THE ANSWERS OR WILL GET REPORTED NO LINKS
How many laws of motion are there? (Newton's)
A. 3
B. 2
C. 1
D. 4
To which kinds of objects do Newton's laws of motion apply?
A. only objects rolling
B. only objects going down a hill
C. all objects
D. only objects flying
As a surfer is seen riding a wave toward the shoreline, what is the shoreline?
A. displacement reference
B. coordinate plane
C. Cartesian boundary
D. reference point
Which does not take the direction of the motion into account?
A. Distance
B. Displacement
C. velocity
Answer: A) 3 / C) all objects / D) reference point / C) velocity
Explanation: I did some research before answering, I hope this helps.
Imagine having to use brainly Couldn't be me.
nubs
Is soap solution a strong, weak or non electrolyte
Answer:
Nonelectrolytes do not dissociate into ions in solution; nonelectrolyte solutions do not, therefore, conduct electricity. ... Strong and Weak Electrolytes.
Explanation:
HELP PLSSSS
In terms of their chemical properties (such as how they react with things), how do the elements in a group compare to the other elements in that group? For example, Sodium (Na) and Potassium (K) are both in the same group, what does this mean about their chemical properties?
Answer:
Groups like the Halogens, which include Chlorine and Flourine, share similar properties both behaviorally and structurally. The Periodic Table is essentially a bunch of patterns and trends and the groups (like the one with Sodium and Potassium) were grouped together because of these similarities.
Explanation:
https://en.wikipedia.org/wiki/Alkali_metal
Which of the following compounds contains an ionic bond? *will give brainliest plus 15 points*
A. CCl4
B. CO2
C. KB
D. NHS
Answer:
C
Explanation:
ionic bonds are bonds between metals and non-metals or metalloids ,so the only compound with a metal is KB
which of the following is not a characteristic of solution?
A. it is a uniform mixture
B. it will scatter a beam of light
C. it is stable over time
D. the solute and solvent cannot be destinguished by the naked eye
rusting of iron can be prevented by wrapping iron articles in newspaper true or false
false, the rusting of iron can be prevented by painting, oiling, greasing or varnishing its surface.
Someone pls tell me the answer
Answer:
6 inches and that should be the answer