Answer:
Here are some of the differences between a mixture of iron and sulfur, and iron sulfide: the mixture can contain more or less iron, but iron sulfide always contains equal amounts of iron and sulfur. the iron and sulfur atoms are not joined together in the mixture, but they are joined together in iron sulfide.
Explanation:
Visible light is a part of what spectrum
Answer:
Visible Spectrum/Electromagnetic spectrum
Explanation:
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.
A car covers a distance of 22.75 km in 17.04 minutes. Use dimensional analysis to calculate its speed in meters/second. Do not enter units in your answer.
Round to the tenths place or further.
The speed of the car = 22.25 m/s
Further explanationGiven
A distance of 22.75 km
Time = 17.04 minutes
Required
The speed (in m/s)
Solution
Speed is the ratio of distance per time
Can be formulated :
v = d/t
v= speed, m/s
d=distance=m
t=time,s
Input the value :
[tex]\tt v=\dfrac{22.75~km}{17.04~minutes}\times \dfrac{1000~m}{1~km}\times \dfrac{1~minute}{60~second}\\\\v=\boxed{\bold{22.25~m/s}}[/tex]
Fe2 O3 = Al =Fe Al2 O3
you will need to be sure to count all of atoms on each side of the chemical equation. Once you know how many of each type of atom you can only change the coefficients (the numbers in front of atoms or compounds) to balance the equation for Aluminum + Iron (II) oxide
PLS HELP ITS URGENT!!!!!!! ILL GIVE BRAINLIEST I PROMISE PLEASE IM BEGGING U HELP ME
Answer:
100%
Explanation:
After distributing the alleles, the genotype Rr will be left in all 4 boxes of the Punnet Square.
I need help with stoichiometry! if you could help please respond to this question and i will post the question. reason being, no one has answered the questions i have posted, and I need help quickly!
Answer:
will go do that.
Explanation:
what is the molar mass of p4010? solve
Answer:
283.889044 g/mol
The molar mass of P4 O10 is 283.889044 g/mol. Adding the molar mass of each element gives us the molar mass of the compound.
Explanation:
Given that nitrogen forms
three bonds with hydrogen to
make NH3, how many hydrogen
atoms do you think will bond
with an atom of phosphorous?
Answer:
Three
Explanation:
Nitrogen and phosphorus are on the same group in the periodic table. Elements in the same group have similar chemical properties. This is because of the number of valence electrons that they share among each other.
The valence electrons are the outermost shell electrons found within an atom.
Nitrogen and phosphorus can both be found on the fifth group on the periodic table.
Their oxidation state is:
either 5 or 8-5 = 3Since phosphorus bonds with 3 hydrogen atoms, nitrogen will also do the same.
I can hit a metal with a hammer without the metal shattering because of its
Malleability
Ductility
Conductivity
Lustrousness
Answer: Malleability
Explanation: cuz ... its right ... lol
Which of the following represents a solution? *
2 points
NaCl (s)
HCl (aq)
H2O (g)
HBr(g)
Answer:units of G.
Explanation:Milk of magnesia, a suspension of Mg(OH)2
in water, reacts with stomach acid (HCl) in a
neutralization reaction.
Mg(OH)2(s) + 2HCl(aq) −!
2H2O(l) +MgCl2(aq)
What mass of MgCl2 will be produced if
4.55 g of Mg(OH)2 reacts?
Answer in units of g.
021 (part 2 of 2) 10.0 points
What mass of HCl is required to completely
react with 4.55 g of Mg(OH)2?
Define the terms heredity and inherited in your own words.
Answer:
Heredity is when you have gotten either physical or mental traits from your parents.
Inherited in Biology: Getting traits from your parents
Inherited outside Biology: is the practice of passing on private property, titles, debts, privileges, rights, and obligations upon the death of an individual.
Explanation:
How many moles of H 2 will I need to make 5 moles of NH3?
12 SSO
Answer:
7.5 moles of hydrogen is required
Explanation:
Given data:
Number of moles of H₂ needed = ?
Number of moles of NH₃ = 5 mol
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Now we will compare the moles of ammonia and hydrogen.
NH₃ : H₂
2 : 3
5 : 3/2×5 = 7.5 mol
Thus, 7.5 moles of hydrogen is required.
1-An object starts moving at 7 m/s in the direction of this and then 14 seconds later moves to
42 m/s What is the average acceleration?
Answer:
4.2ms
Explanation:
a=u±at a=42±7 now solve thisWhy is methanol more soluble in water than butanol
Answer:
Explanation: The longer the alkyl chain, the less soluble in water is the alcohol. Methanol and ethanol are infinitely miscible in water; propanol and butanol have limited solubility. ... Hydrogen bonding with water thus becomes less viable, and solubility of the long-chain alcohol IN WATER decreases.
Explanation:
What is the charge for the cation in AgBr
A formula unit is defined as the lowest whole number ratio of
the ions present in an ionic compound. The formula unit of an
ionic compound is always an empirical formula.
What is the formula unit of barium fluoride?
Answer: [tex]BaF_{2}[/tex]
Explanation: Because barium is in Group 2, it forms ions with a charge of +2. Fluorine, in Group 17, form ions with a charge of -1. Cross the charges to get the subscripts (Since Ba has a charge of +2, F has a subscript of 2. Because F has a charge of -1, Ba needs a subscript of 1). Therefore, a formula unit of the compound is [tex]BaF_{2}[/tex].
From the following elements: lithium, beryllium, and fluorine, predict which
one will have the largest second ionisation energy. Explain your answer.
Answer:
The element that has the largest second ionization energy is;
Lithium, Li
Explanation:
The given elements and their positions on the periodic table are;
1) Lithium is located in group 1, period 2 position on the periodic table
2) Beryllium is located in group 2, period 2 position on the periodic table
3) Fluorine is located in group 17, and period 2 position on the periodic table
The first ionization energy of the atoms in the periodic table increases across the periods from left to right and also increases from bottom to the top within a group
However for the second ionization energy, which is the energy required to remove an electron from an atom that has one less electron, we have;
The electron configuration of the given of ions that take part in the reaction for the removal of the second ionization energy are;
Li⁺ = [He} 2s⁺
Therefore, the second ionization energy is the removal of an electron from the stable duplet of the helium atom (the core of the lithium atom) which require about 7297 kJ/mol
For beryllium, we have;
Be⁺ = [He]2S¹⁺
Therefore, the second ionization requires the removal of the remaining one electron in the valence shell, which will then lead to the remaining structure of the stable helium core and therefore, the second ionization energy of beryllium is about 1757 kJ/mol, which is low compared to helium
For fluorine, we have;
F⁺ = [He] 2s² 2p⁴⁺
Therefore, the second ionization of fluorine remains high due to the increased attraction of the positively charged fluorine ion for electrons than electrically neutral fluorine atom that has equal number of protons and electrons such that the second ionization energy of fluorine is higher than the first ionization energy and is about 3357 kJ/mol
Therefore, the element that has the largest second ionization energy is lithium, Li.
Put the levels of organization in order from smallest to largest
Organism
Community
Ecosystem
Population
lord kokichi plz help
what properties influence weather
Answer:
elevation
wind & air pressure
solar radiation
i am not lord kokichi, but much better B)
Answer:
There are six main components, or parts, of weather. They are temperature, atmospheric pressure, wind, humidity, precipitation, and cloudiness. Together, these components describe the weather at any given time.
Explanation:
I AM LORD KOKICHI YOUR WELCOME
What is the mass of 6.02 x 1023 particles of rubidium carbonate
Answer:
Explanation:
84.97
Fish in a frozen lake can survive throughout the winter months due
partially to the fact that lakes don't freeze solid. Fresh water has a density
of 1.00 g/cm3. A piece of ice has a mass of 57g and a volume of 62 cm3.
Give the density of the piece of ice (use the density formula d = m/V) and
explain what will happen to it in the lake.
The ice will float on the lake
Further explanationGiven
Mass of ice 57 g and a volume of 62 cm³
Required
Density
Solution
Density formula:
[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]
Input the value :
ρ = 57 g : 62 cm³
ρ = 0.919 g/cm³
Because the density of ice is less than water, it will float on the lake
.
25.00 g of the compound is composed of 6.77 g of tin and 18.23 g of bromine. What is the percent by mass of tin in the compound? Show work.
The percent by mass of Tin : = 27.08%
Further explanationGiven
25.00 g of the compound
6.77 g of Tin
18.23 g of Bromine
Required
The percent by mass of Tin
Solution
Proust stated the Comparative Law that compounds are formed from elements with the same Mass Comparison, so that compounds have a fixed composition of elements
%mass X = (mass X/mass sample) x 100%
So %mass of Tin :
= (6.77 g : 25 g) x 100%
= 27.08%
Fe0 + 2H+1 Cl-1 → Fe+2 Cl2 -1 + H20 ↑
De acuerdo con la ecuación planteada si se cambia el hierro Fe por dos moles de sodio Na0 probablemente formará
A. 2NaCl + H2
B. NaCl + H2
C. 2NaH + Cl2
D. NaCl2 + H2
Answer:
A and the answer if we can manage by its formula NaCl H2 but the answer is A
Which of the following atoms would have a charge of +1?
An atom with 9 protons, 9 electrons, and 9 neutrons
An atom with 7 protons, 11 electrons, and 8 neutrons
An atom with 5 protons, 5 electrons, and 4 neutrons.
An atom with 6 protons, 5 electrons, and 7 neutrons
Answer: An atom with 6 protons, 5 electrons, and 7 neutrons
Explanation: In this case, neutrons do not matter as they have a charge of 0, or no charge. A proton has a charge of +1 and an electron has a charge of -1. Since there are 6 protons, the total charge of the protons would be +6. Since there are 5 electrons the total charge of the electrons would be -5. +6 - 5 would result in a charge of +1. This means that this atom would have an overall charge of + 1. Basically, if there is one more proton than electron, then the overall charge of the atom will be +1 but if there is one more electron than proton, then the overall charge of the atom will be -1.
025 Aqueous barium chloride and aqueous potassium carbonate react to produce solid
barium carbonate and aqueous potassium chloride.
A25
I need the balanced chemical equation for this
The balanced equation
BaCl₂(aq)+ K₂CO₃(aq)--> BaCO₃(s) + 2KCl(aq)
Further explanationGiven
word equation
Required
Balanced equation
Solution
Convert to chemical equation :
Reaction
BaCl₂(aq)+ K₂CO₃(aq)--> BaCO₃(s) + KCl(aq)
Give a coefficientaBaCl₂(aq)+ K₂CO₃(aq)--> bBaCO₃(s) + cKCl(aq)
Make an equationK, left = 2, right = c⇒c=2
C, left = 1, right = b⇒b=1
Ba, left = a, right = b⇒a=b⇒a=1
The equation becomes :
BaCl₂(aq)+ K₂CO₃(aq)--> BaCO₃(s) + 2KCl(aq)
How many particles are in 34g of Gold?
Answer:
1039.482
Explanation:
3
Which two elements are the most abundant in the Earth's crust?
OA. iron and magnesium
B. iron and nickel
Oc. silicon and magnesium
OD. silicon and oxygen
Novomatlan
Yes
Answer:
Look at the properties of Oxygen and Silicon - the two most abundant elements in the Earth's crust - by clicking on their symbols on the Periodic Table.
Explanation:
Answer:
D. silicon and oxygen
Explanation:
The most abundant elements on the earth's crust are silicon and oxygen. Silicon and oxygen forms a wide range of silicate minerals they are found in the crust.
There are many silicates which are derived from the basal units of silicon and oxygen combining together. Other atoms or elements then combines with the silicate framework.
Oxygen is about 46% abundant in the crust whereas silicon takes about 28% to be the second most abundant element on the crust.
Silicate minerals abounds in rocks and within the soil.
Scientists say that photosynthesis and cellular respiration create a cycle that is essential to almost all life on Earth. Use your knowledge of these processes to explain how an oil spill that kills a large percentage of the photosynthetic organisms living in the ocean could affect humans.
Answer:
Explanation:
An oil spill is a catastrophic event in the environment. It can negatively affect both plants and wildlife while causing human suffering and economic losses. An oil spill needn't be on the scale of the Exxon Valdez or Deepwater Horizon disasters. The U.S. Environmental Protection Agency (EPA) estimates that 200 million gallons of used oil are disposed of improperly each year.
Spilled oil floats on the surface of the water, blocking the sunlight, from reaching the plants within the body of water. Spilled oil may also directly coat the leaves of plants -- where most of the work of photosynthesis occurs -- reducing or blocking out sunlight. Without sunlight, plants lack the energy needed to undergo photosynthesis.
An oil spill can impact photosynthesis by reducing water quality. Not only does the presence of oil directly poison the water, but the spill can kill sea life, birdlife and other wildlife that uses an aquatic habitat. A large die-off can increase bacteria levels and lower the pH of a body of water. The reduction in water quality can stress plants, essentially halting photosynthesis.
What is the formula for displacement? *
1- Final position minus initial position
2- Relation to a reference point plus distance travelled
3- Distance divided by time
4- Speed times vector
Answer:
2 i think i am not very good at this lol
Explanation:
The units that acceleration use are distance/time^2 (in metric units).
The acceleration is the change of velocity over time, so
In another way, if the velocity is constant, the acceleration is zero, but if the velocity change over the time (as a car do when the red light change), the acceleration takes value!.
The closest star to our Sun is Proxima
Centauri, which is 4.242 light years away.
What is the distance to Proxima Centauri in
kilometers?
Answer:
Distance in kilometre = 4.242 x 10¹² km
Explanation:
Given:
Distance of Proxima Centauri = 4.242 light years
Find:
Distance in kilometre
Computation:
1 light year = 10,000,000,000,000 km
So,
4.242 light years = 4.242 x 10,000,000,000,000
Distance in kilometre = 4.242 x 10¹² km
Can anyone explain and answer?
Which physical change are both exothermic
A)condensation and evaporation
B)evaporation and melting
C)freezing and condensation
D)melting and freezing
Answer:
I would say C.)
Explanation:
Freezing and condensation are both ways that heat is let out from an object.