Answer:
https://www.bbc.co.uk/bitesize/guides/zpykxsg/revision/3 (i know ppl hate it when you put links but i actually think this may explain it)
Explanation:
When sand is mixed with water, it forms:
Answer:
Heterogeneous mixture.
(The composition is not uniform.)
butane is a saturated hydrocarbon
Why is a comet's orbit considered a cycle?
Answer:
. Comets go around the Sun in a highly elliptical orbit.
Explanation:
Answer:
Comet's orbit around the sun at a rapidly high speed witch considers the comets orbit a cycle.
Because they have aromas, compounds with a ring of resonance bonds are called –
A) fragrent compounds
B) pungent molecules
C) aromatic compounds
D) scented structures
Please helppp and no linkss
Answer:
C I'm pretty sure
Explanation:
uhhhhhhhhh yes
How many molecules of ammonia would there be in 40.0 grams of ammonia?
1.42x10^24 molecules
40.0 grams NH3 (6.02x10^23/17.0 grams NH3)= 1.42x10^24 molecules
Help would be majorly appreciated
Answer:
a) the atomic number is 15
b) the mass number is 15+16 = 31
c) element is phosphorus
d)Group 15 period 3
This is an acid that dissociates 100% into ions. HA -> H+ + A-
(Hint: 10 letters)
Answer:
Uhh i'm not sure if this can help but natural resources?? SO SORRY IF IT DOESN'T HELP!
Answer:
Strong Acids
Explanation:
What is the freezing point of water if 15.0 g of NaCl is dissolved
in 100. g of water? (Kf of water = 1.86 K-kg/mol)
a
255 K
b 263 K
C273 K
d 268K
e 277 K
Answer:
263
Explanation:
PLEASE HELP
A strong acid will __________ into ions when placed in water.
A
not dissolve
B
partially dissolve
C
completely dissolve
D
sometimes dissolve
Answer:
c. completely dissolved
What is the concentration, in M, of a KBr solution that contains 0.0688 moles of
KBr dissolved in 0.250 liters?
2.75 M
3.63 M
1.78 M
0.275 M
Answer:
2.75M
Explanation:
Concentration(M)= mol/volume
0.0688mol/0.250L
=0.2752M
which Scientific discovery resulted in the solid atom theory
being adapted into the Plum Pudding model of the atom?
Answer:
After discovering the electron in 1897, J J Thomson proposed that the atom looked like a plum pudding . To explain the two types of static electricity, he suggested that the atom consisted of positive 'dough' with a lot of negative electrons stuck in it.
how many mol are there if there are 3 mol of KNO3?
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles KNO3, or 101.1032 grams.
1. How is energy transported from where it is generated to homes?
2. How is some energy lost as it is transmitted and how can this be minimized?
Plz answer fast its worth 30 points
Answer:
1. (put in simpler words so no one knows you got it off of brainly)
The electricity that flows to our homes is generated in power stations. From here, it flows through large transmission lines, which carry it to substations. Finally, distribution lines carry electricity from substations to houses, businesses, and schools.
2. (put in simpler words so no one knows you got it off of brainly)
The transmission over long distances creates power losses. The major part of the energy losses comes from Joule effect in transformers and power lines. The energy is lost as heat in the conductors. This can be minimized by
answer choice 1: reducing technical losses including: replacing incorrectly sized transformers, improving the connection quality of conductors (power lines), and increasing the availability of reactive power by installing capacitor banks along transmission lines.
answer choice 2: (just in case answer choice 1 isn't what you're looking for)
You can reduce losses in your home by spreading out your electricity use evenly throughout the day, instead of running all your appliances at once.
Explanation:
hope this helped <3
1. Place these unknown pH test papers in order from most acidic to most alkaline.
B
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14
pH color chart
A. Paper D, paper C, paper B, paper A
B. Paper B, paper A, paper C, paper D
CPaper C. paper D paper A, paper B
D. Paper D paper o paper A, paper B
Answer:
D. Paper D, paper C, paper A, paper B
Explanation:
Please check the attached image for a diagram showing clearly the pH colour chart
pH measures how acidic or alkaline a solution is. The pH scale ranges from 1 - 14
Solutions with a pH less than 7 are acidic
Solutions with a pH equal to 7 are neutral
In the image, test papers D and C occur on the left, thus, they are acidic
Solutions with a pH greater than 7 are alkaline
pH test papers are used to test to test how acidic or alkaline a solution is
How many mols of H2SO4 is in 0.80 L of 1.40 M H2SO4?
Which of these belongs in the outermost shell (energy level) of an atom?
A)Neutrons
B)Photons
C)Electrons
D)Protons
Answer:
C)Electrons
Explanation:
Hope this helped!!!
HNO3 + KOH + H2O + KNO3
ACID:
BASE:
SALT:
Explanation:
acid, HNO3
base, KOH
salt ,KNO3
A student measures out 5 mL of calcium chloride solution into a small container and 5 mL of sodium carbonate solution in another small container. The total mass of both chemicals and the containers they are in is 15.5 g. When the student combined the two clear liquids, a gooey, cloudy precipitate formed. What would the total mass of the products and the two containers be after this reaction took place?
Group of answer choices
15.2 g
15.5 g
31.5 g
Answer:
15.5g
Explanation:
your welcome
Buscaban el elixir de la vida eterna A) Los alquimistas B) Los flogistas C) Los iatroquímicos D) Los químicos E) Los brujos
Answer:
A) Los alquimistas.
Explanation:
¡Hola!
En este caso, es necesario recordar que en la historia de la ciencia, la alquimia se define como una vieja práctica protocientífica con tintes filosóficas que se enfocaba en la combinación de elementos de la química, metalurgia, física, medicina, astrología, semiótica, misticismo, espiritualismo y el arte; por tal razón, se sabe que esta era la que buscaba el elixir de la vida eterna. Por lo tanto, la respuesta es A) Los alquimistas.
¡Saludos!
Which of the following is true of oxygen?
A. Oxygen is an element because its most basic unit is a single type of atom.
B. Oxygen is a compound because its most basic unit is a single type of atom.
C. Oxygen is a mixture because its most basic unit contains more than one particle.
D. Oxygen is a compound because its most basic unit contains more than one type of particle.
Answer:
A. Oxygen is an element because its most basic unit is a single type of atom.
Explanation:
Oxygen is the chemical element with the symbol O and atomic number 8.
Describe the conversion of light energy in a blackberry plant.
Answer:
Anthocyanins are used in organic solar cells because of their strong light harvesting, and their ability to convert this light energy into electrical energy.
Explanation:
Solar panels plug you into the sun by absorbing solar energy with photovoltaic (PV) cells. When hit with sunlight, they generate electricity which then flows into a device called an inverter which converts the electricity into a form (120 volts, 60Hz) for household use.
Consider the reaction
2 NO2 (g) <=> N2O4
If the equilibrium concentration of both NO2 and N2O4 are 0.2 M, what is the value of Kc?
A. 0.2
B. 0.3
C. 0.225
D. 5.0
E. 2.5
Please help.
Answer:
D. 5.0
Explanation:
Step 1: Write the balanced equation at equilibrium
2 NO₂(g) ⇄ N₂O₄(g)
Step 2: Calculate the concentration equilibrium constant
The concentration equilibrium constant (Kc) is equal to the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients.
Kc = [N₂O₄]/[NO₂]² = 0.2 / 0.2² = 5
How many moles are in 38 grams of Argon?
Answer:
we can conclude that there are 0.55 moles in 22 grams of argon.
A boulder sits at rest on top of a mountain. What conclusion can be made about the forces acting on the boulder
Explanation:
Since, the boulder is at rest. This means that there is an equilibrium of forces acting on the boulder.
According to principle of equilibrium of forces a body can be in position of rest only when net force acting on body is zero for translation equilibrium and net moment acting on the body must also be zero for rotational equilibrium.
Therefore, net forces and net moment acting on the boulder is zero.
what type of intermolecular forces does ammonium lauryl sulfate have?
Answer:
Ammonium lauryl sulfate, like any other surfactant, makes a good base for cleansers because of the way it disrupts the hydrogen bonding in water. Hydrogen bonding is the primary contributor to the high surface tension of water. In hydrogen bonding with the water surrounding them.
What are the half-reactions for a galvanic cell with aluminum and gold electrodes?
A. A3+ (aq) + 3e > Al(s) and Au+(aq) + e* → Au(s)
B. Al(s) → A13+(aq) + 3e and Aut(aq) + e
Au(s)
C. AB+(aq) + 3e – Al(s) and Au(s) — Au (aq) + e
D. Al(s) → AB+(aq) + 3e and Au(s) → Au(aq) + e
Answer:B is right
Explanation: Al loses electrons and is oxidised, Au gains electron. And is reduced
To solve such this we must know the concept of half cell reaction. Therefore, the correct option is option B that is Al(s) → A1³⁺(aq) + 3e and Au(aq) + e [tex]\rightarrow[/tex]Au(s)
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Oxidation is loss of electrons and reduction is gain of electrons. The electron transfer from oxidant to reductant. Al loses electrons and is oxidized, Au gains electron. And is reduced.
Therefore, the correct option is option B that is Al(s) → A1³⁺(aq) + 3e and Au(aq) + e [tex]\rightarrow[/tex]Au(s)
Learn more about the chemical reactions, here:
brainly.com/question/3461108
#SPJ2
What is the difference between voluntary and involuntary muscles?
A. Voluntary muscles are striated and tire easily; involuntary muscles are not striated and do not tire easily.
B. Voluntary muscles can be almost anywhere; involuntary muscles are found only in the heart.
C. Voluntary muscles are under your conscious control; involuntary muscles are not.
D. Voluntary muscles are all skeletal muscles; involuntary muscles are cardiac muscles.
help me please id appreciate it
Answer:
Thats the periodic table of elements
Explanation:
Hello, just wondering if anyone could help. If so thanks!!!
Exercise 2:
The thermic decomposition of potassium chlorate (KClO3
) is a method used at laboratory to produce oxygen (O2
) and produce potassium
chloride (KCl).
1. Write the balanced equation of the reaction
2. Calculate :
3.1. The molar mass of KClO3
3.2. The number of moles of oxygen gaz produced during the decomposition of
0,5mol de KClO3
(s)
3.3. The mass of potassium chloride obtained from 30,6 g KClO3 solid
M(K)= 39 g.mol-1
; M(Cl)= 35 g.mol-1
; M(O)= 16 g.mol-1
Answer:
1. KCLO3------>KCL + 3/2O2(g)
2. 122.5g/mol
3. 0.2mol
4. 18.5g