Classify the following as an element, compound, homogeneous mixture, or heterogeneous
Mixture :
Iron and rust
A. Element
B. Compound
C. Homogenous mixture
D. Heterogenous mixture
Answers
Answer:
It's an homogeneous Mixture
hehe
Related Questions
What is the primary difference between a hypothesis and a theory?
Answers
Answer: A hypothesis is an explanation for observations. A theory is an explanation for what has been shown many times.
Explanation:
Atoms with a high electronegativity, like oxygen have a strong attractive force
for electrons because
A. they have only a few valence electrons and need a total of eight to
fulfill the octet rule
O B. they're trying to share electrons with other elements of high
electronegativity
O C. opposites attract
O D. they re close to filling their outer shell, fuffilling the octet rule
Answers
Answer:
D. they're close to filling their outer shell, fulfilling the octet rule
Explanation:
:)
Which of the following is NOT an
example of matter?
a. clouds
b. gasoline
С. ice
d. light
Answers
Answer:
Which of the following are not examples of matter, well clouds are matter, gasoline is matter, ice is matter, so it would be light.
The three most common phases of matter are
Answers
Answer:
Solid, Liquid, and Gas
Explanation:
There are constantly these three phases of matter around us every day. The water you drink is a liquid, the chair you sit on is a solid, and the air you breathe is a gas.
10.Conduction is the method of heat transfer in solids but not liquids and gases. Why?
(1 Point)
Finiter your
Answers
Answer:
Conduction only happens when the object is a solid, because conduction happens in objects that are closely, with molecules that are closely packed together, and have a definite shape. Since, in liquids and gases, the shape is not definite nor do they have closely packed molecules., conduction does not take place in them
what is characteristics of the 6kingdoms
Answers
Answer:
Archaea, Bacteria, Protista, Fungi, Plantae, and Animalia
What is characteristics of the 6 kingdoms.
6 kingdoms of what? Are you talking about biology?
If yes I assume you're talking about the defitions for the animal kingdom made by Woese and his colleagues in 1977.
Eubacteria: Single-celled bacterial organisms.
Archaebacteria: Single celled bacterial organisms that live in extreme enviroments
Protista : Single-celled organisms more complex than bacteria
Plantae: Multi-celled, complex organisms that produce their own food
Fungi: Multi-celled organisms that don't produce their own food
Animalia: Complex, multi-celled, organisms that consume other organisms for food.
An experimental procedure says to accurately weigh approximately 1 g of
substance on analytical balance. Which of the following measurements are
consistent with these instructions? Select all that apply.
1.0456 g
1.0 g
0.9811g
1 g
1.01g
O 0.99
Answers
Answer:
1.0456 g and 0.9811g
Explanation:
The measurements that are consistent with the approximate 1 g instruction would be 1.0456 g and 0.9811g.
Analytical balance generally weighs to an accuracy of 4 decimal places. Hence, every other option that is short of being in 4 decimal places is incorrect.
Also, 1.0456 g and 0.9811g when approximated to the nearest whole number give 1 g.
What is the charge on an electron?
O-1
O 0
O +1
O +2
Answers
Answer:
-1
Explanation:
Because it is the smallest sub-atomic particle
Latent heat of vaporization is used to (1 Point) (a) overcome the forces of attraction between molecules in solid-state. (b) increase the kinetic energy of molecules in a liquid state. (c) overcome the forces of attraction between molecules in a liquid state. (d) increase the kinetic energy of molecules in the vapour state.
Answers
Answer:
Not sure what the answer is
Explanation:
I did this a while ago and dont remember sorry
An electrical company charges 15 p per unit of energy (kWh).
Calculate the cost of running a 500 W freezer for a day. Show your working.
Answers
Answer:
180 p
Explanation:
Energy refers to the capacity of doing work.
Amount charged by an electrical company = 15 p per unit of energy (kWh)
As 1 W = 1000 kW,
[tex]500W=\frac{500}{1000}kW=0.5\,kW[/tex]
Also, 1 day = 24 hours.
Cost of running a 500 W freezer = 0.5 kW freezer for 1 hour = [tex]15\times 0.5=7.5\,p[/tex]
Therefore,
cost of running a 0.5 kW freezer for a day ( 24 hours ) = [tex]7.5\times 24=180\,p[/tex]
Amount charged by an electrical company = 15 p per unit of energy (kWh)
As 1 W = 1000 kW,
[tex]500W=\frac{500}{1000}kW=0.5\,kW[/tex]
Also, 1 day = 24 hours.
Cost of running a 500 W freezer = 0.5 kW freezer for 1 hour = [tex]15\times 0.5=7.5\,p[/tex]
Therefore,
cost of running a 0.5 kW freezer for a day ( 24 hours ) = [tex]7.5\times 24=180\,p[/tex]
Crude oil is a miscible mixture of liquids that has many uses . During the refining process it is separes and used to produce aviation fuel diesel fuel and gasoline how should scientists separate crude oil based on its physical properties
Answers
Answer:
3 rd point will be the ans
An iron nail with a mass of 12 grams absorbs 12 Joules of heat. If the nail was initially at 25°C, what is the final temperature?
Answers
Label each element in the chemical reaction below with the correct oxidation state
NH3 (aq) + 3 HOCl (ax)
NCI () + 3 H20 (1)
Answers
Answer:
N = -3
H = +1
O = -2
Cl = +1
Explanation:
The balanced Equation of the reaction above is:
NH3 + 3HOCl ----> NCl3 + 3H2O
Where NH3 is ammonia;
HOCl is Oxochlorate (I) acid
NCl3 is nitrogen trichloride
H2O is water
Nitrogen in both Ammonia and Nitrogen trichloride has an oxidation state of -3. It shares three electrons with each of the three atoms of hydrogen and chlorine
Hydrogen in both Oxochlorate (I) acid and in water has an oxidation state of +1. Each atom shares an election with oxyen in both compounds.
Oxygen in both Oxochlorate (I) acid and water has an oxidation state of -2. Each atom shares two electrons with neighboring atoms; in HOCl, it shares with chlorine and hydrogen, while in H2O, it shares with two atoms of hydrogen.
Chlorine in both Oxochlorate (i) acid and Nitrogen trichloride has an oxidation state of +1. It shares an electron with each of it's neighboring bonded atoms.
What are the 3 critical components of an electromagnet and what purpose do they each serve?
Answers
Answer:
A source of electricity, a wire coil, and an iron core
Explanation:
An electromagnet has three critical components:
1. A source of electricity
This is often a battery.
It generates the electric current that produces the magnetic field.
2. A wire coil
The wire carries the electric current.
Stacking the wire into loops makes a stronger magnetic field.
The more loops in the coil, the stronger the field.
3. An iron core
An iron core greatly increases the strength of the magnetic field within it and at its ends.
Write a word equation and symbol equation (including state symbols)
for the reaction of calcium chloride with sodium hydroxide
Answers
Answer:
Explanation:
Calcium chloride reacts with NaOH to produce the Calcium hydroxide
CaCl2 + 2NaOH ----> 2NaCl + Ca(OH)2
What is the molar mass of CaS
Answers
=molar mass( CaS )
= 40.08+32.07
=72.15 g mol-1
Molar mass= atomic weight = (Ca= 40.08 and S= 32.07)Answer:
72.143 g/mol
Explanation:
Unscramble the following words to form a complete sentence about the cycles of nature:
limited is through environment Matter recycled the on Earth is and
Answers
Answer: idk I have that question too , sorry to get ur hopes up high thinking this was an answer. PERIOTTTT
Explanation:
Let's say you added too much magnesium in the amount of 0.1594 g. How much 8.00 M HCl (in mL) would be required to decompose the excess Mg present?
Mg(s) + 2 HCl(aq) --> MgCl2(aq) + H2(g)
Answers
Answer:
1.65×10^-3 L or 1.65 mL
Explanation:
Number of moles of magnesium in the excess reagent= mass of excess reagent/ molar mass of magnesium
Mass of excess magnesium= 0.1594 g
Molar mass of magnesium= 24 gmol-1
Number of moles of magnesium= 0.1594/24 = 6.6×10^-3 moles
From the reaction equation;
1 mole of magnesium reacted with 2 moles of HCl
6.6×10^-3 moles of magnesium will react with 6.6×10^-3 moles × 2= 13.2×10^-3 moles of HCl
But we know that;
Number of moles of HCl= concentration of HCl × volume of HCl
Volume of HCl= number of moles of HCl/ concentration of HCl
Since concentration of HCl= 8.00M
Volume of HCl= 13.2×10^-3/8.00= 1.65×10^-3 L or 1.65 mL
Which of the following is the conjugate base of HPO 2?
O A. H2P04
B. PO 3
C. H3PO4
O D. HAP04
Answers
Answer:
A. H2P04
Explanation:
How much quantity in mL of concentrated 12 M hcl (aq) is needed to prepare a 250mL of 0.5 M hcl solution?
Answers
Answer:
10.41 mL of concentrated 12 M HCl (aq) is needed to prepare a 250mL of 0.5 M HCl solution
Explanation:
Dilution is the procedure to prepare a less concentrated solution from a more concentrated one. The amount of solute does not vary, but the volume of the solvent varies. More solvent is added and the concentration of the solute decreases, as the volume of the solution increases.
In this case it is fulfilled:
Vi * Ci = Vf * Cf
Vi = initial volume
Ci = initial concentration
Vf = final volume
Cf = final concentration
Being:
Vi=?Ci= 12 MVf= 250 mL= 0.250 L (being 1 L= 1000 mL)Cf= 0.5 MReplacing:
Vi*12 M= 0.250 L* 0.5 M
Solving:
[tex]Vi=\frac{0.250 L*0.5 M}{12 M}[/tex]
Vi= 0.01041 L= 10.41 mL
10.41 mL of concentrated 12 M HCl (aq) is needed to prepare a 250mL of 0.5 M HCl solution
Where do food molecules for cecropia trees come from?
Answers
Answer:
Central and South American forests.
Explanation: https://brainly.in/question/7540305
What causes the sun's core and the earth's core to have extremely high temperatures?
Select one:
a. The sun undergoes fusion and the earth undergoes fission. b. Both have nuclear fusion occurring in their cores.
c. Both have nuclear fission occurring in their cores.
d. The sun undergoes fission and the earth undergoes fusion.
Answers
The volume of a gas is 450 mL when its pressure is 1.00 atm. If the temperature of the gas does not change, what is the
pressure when its volume is changed to 2.00 L?
Use PV = P2V2.
0.225 atm
O 0.444 atm
O 2.25 atm
O 4.44 atm
Answers
Answer: 0.225 atm
Explanation:
For this problem, we have to use Boyle's Law.
Boyle's Law: P₁V₁=P₂V₂
Since we are asked to find P₂, let's manipulate the equation.
P₂=(P₁V₁)/V₂
[tex]P_{2} =\frac{(1.00atm)(0.45L)}{2.00L}[/tex]
With this equation, the liters cancel out and we will be left with atm.
P₂=0.225 atm
What does Avogadro's law say about a gas atSTP? A; 1 L of any gas contains 22.4 moles at STP B; 1 L of any gas has a pressure of 22.4 atm at STP C; All gases are at 22.4 atm at STP D; 1 mole of any gas has a volume of 22.4 L at STP
Answers
Answer: 1 mole of any gas has a volume of 22.4 L at STP
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
According to ideal gas equation:
[tex]PV=nRT[/tex]
P = pressure of gas = 1 atm (at STP)
V = Volume of gas = ?
n = number of moles = 1
R = gas constant =[tex]0.0821Latm/Kmol[/tex]
T =temperature =[tex]273K[/tex] (at STP)
[tex]V=\frac{nRT}{P}[/tex]
[tex]V=\frac{1mol\times 0.0820 L atm/K mol\times 273K}{1atm}=22.4L[/tex]
Thus 1 mole of every gas occupies 22.4 L at STP
Answer:
1 mole of any gas has a volume of 22.4 L at STP
Explanation:
ap3xx
Questions
Warm air rising in the atmosphere is an example of heat being transferred by
o absorption
O conduction
O convection
O radiation
Answers
Answer:
the answer is convection
convection
What is the best example of electromagnetic energy in everyday life
Answers
Answer:best
Explanation:
Best
Which of following is the most accurate description of a piston in an internal-
combustion engine?
A shaft that converts the up-and-down motion into a rotary motion
A plug that protrudes through the cylinder head and makes sparks that ignite the
air-and-fuel mixture
A can-shaped component that moves smoothly up and down and is the main
moving part
O A hollow metal tube drilled into the solid metal engine block
Answers
Answer:
A can-shaped component that moves smoothly up and down and is the main moving part
Explanation:
I chose the other answer that other person listed but got it wrong. This instead is the correct answer
Answer:
C. A can-shaped component that moves smoothly up and down and is the main
moving part
Explanation:
The piston is a can-shaped component that can move smoothly up and down inside the cylinder; it moves up to compress the air-and-fuel mixture and is pushed down when the spark plug ignites the mixture, which causes an explosion.
Compounds formed when non-metals react with metals consist of particles called ionic compound
Answers
Heptane, pentane and octane are accidentally mixed. They all have different boiling points. Pentane boils at 360 ° C, hexane boils at 690 ° C and octane boils at 12 ° C. What method would you use to separate these liquids? Explain how the method works.
Answers
Answer:
Fractional distillation
Explanation:
Heat the mixture upto 700°C
The compuond with low boiling point will evaporate first and the compound with higher boiling point will evaporate last.
3. Hydrochloric acid is used to clean metals.
The acid reacts with the oxide layer on the surface of the metal, forming a salt and water.
Which word describes the metal oxide?
A alloy
B base
C element
D indicator
Answers
From background knowledge, we know that a base plus acid gives you a salt and water. The hydroxide ions from the base neutralise the hydrogen ions from the acid, which gives you water ( as it has a pH of 7).
Therefore, your answer is b, a base
Answer:
Base
Explanation:
Acid + Base ⇒ Salt + Water (Neutralization Reaction)
So the substances forming salt and water must be acid and base.
Since HCl is acid so the Metal Oxide would be the base.