Answer:
Try everything or guess, that will always work
1.42 x 10^24 molecules
1.78 x 10^28 molecules
7.04 x 10^23 molecules
14.2 x 10^24 molecules
Explanation:
Where does the light we see from the moon come from?
PLEASE HELP!!!
Which of the analogies best describes a Bohr model of an atom?
A. A Bohr model is like a bowling ball because they are both solid spheres.
B.A Bohr model is like a model of the solar system because they both show orbits around a massive center
C. A Bohr model is like a string of beads because they both contain small parts that are lined up in a row.
D. A Bohr model is like a jigsaw puzzle because they are both made up of small parts that are all joined together.
Answer:
B is the Bohr model of atom
how do we make our natural resources last for generations to come?
Answer:
We can use non-plastic water bottles, use reusable ziploc bags, use a felt grocery bag, fill a bucket of water while you are showering then afterwards use it to water plants.
this all can help because it is our reusable and the plastic things can end up in the ocean (ocean/ water is a natural resource).
What was important about the Hydrogen bright line emission spectrum?
Answer:
The emission spectrum lines are the changes in the quantum energy levels of the single electron in the Hydrogen atom.
Explanation:
Electrons move around the hydrogen atom in electron waves patterns. These waves occur in distinct quantum energy levels.
The change from one quantum energy level to another energy level has a definite energy level change. There is a wave length associated with each change in energy levels. These wave lengths have a color associated with them.
Low energy level changes have long wave lengths associated with them giving red and orange colors.
High energy level changes have short wave lengths associated with them giving blue and violet colors.
Note each atom has a unique emission spectrum associated with the energy levels and electron structure of the atom. Helium was first discovered by looking at its emission spectrum as seen in the sun.
Explanation:
BCL PART
<
10 of 25
Fill in the coefficients with the correct numbers to create a balanced equation,
Al + _ Brg _M1Brz
0 1,21
2,3,2
4,6,4
34,3
Answer:
im not sure sorry
Explanation:
Which of the following is/are true regarding chemical
nomenclature?
A. All elements in a compound must be included
in the name.
B. Ionic and molecular nomenclature have
different rules.
C. A formula for an ionic compound is written
with the cation first followed by the anion.
D. A chemical formula must always be reduced to
the lowest whole number ratio.
Answer:
c
Explanation:
i took the quiz
pls answer if you do ty so much
Answer:
c
Explanation:
What is the formula of a compound that has [1 mol Fe], [1 mol Ti], and [3 mol O]
Answer: [tex]FeTiO_3[/tex]
Explanation:
Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.
Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.
The molecular formula for a compound that has [1 mol Fe], [1 mol Ti], and [3 mol O] will be [tex]FeTiO_3[/tex]
Which of the following is
NOT a part of the digestive
system?
A
Mouth
B Esophagus
C Intestines
D
Kidneys
1137 AM
o search
B
Answer:
Kidneys
Explanation:
I learned about it :)
Answer:
DkidneysExplanation:
I hope it helps
Determine the block of the element Iron which has 26 atomic number:
Answer:
ok
Explanation:
Answer:
Iron
Explanation:
How do most diamonds get their color?
Answer:Most naturally-coloured diamonds are created when trace elements interact with the carbon atoms during the diamond's creation. The presence of chemical elements such as nitrogen, sulphur, and boron can colour diamonds in shades of yellow, green, and blue. ... Trace elements have never been found in pink diamonds.
in other words it depends on the heat of how it is made
What is true of a Brønsted-Lowry base?
A. A Brønsted-Lowry base accepts H+ ions.
B. A Brønsted-Lowry base donates electrons.
C. A Brønsted-Lowry base donates OHions.
D. A Brønsted-Lowry base accepts OH-ions.
Answer:
I think the answer is A sorry if I am wrong :c
A Brønsted-Lowry base is a species that accepts H⁺ ions (A).
What is Brønsted-Lowry theory?It is an acid-base theory.
Brønsted-Lowry acid: is a species that donates H⁺.Brønsted-Lowry base: is a species that accepts H⁺.What is true of a Brønsted-Lowry base?
A. A Brønsted-Lowry base accepts H⁺ ions. True.
B. A Brønsted-Lowry base donates electrons. False. This is a Lewis base.
C. A Brønsted-Lowry base donates OH⁻ ions. False. This is an Arrhenius base.
D. A Brønsted-Lowry base accepts OH⁻ ions. False. This is not part of any acid-base theory.
A Brønsted-Lowry base is a species that accepts H⁺ ions (A).
Learn more about Brønsted-Lowry acid and bases here: https://brainly.com/question/7256753
What does the word photosynthesis mean?
PIC IS BELOW!
Can somebody sort these from non-metals to metals?
Sonorous, low melting point, high density, brittle, dull, malleable, basic oxide
Is the following statement true or false:
Cellular respiration only occurs in animal cells.
Question 1 options:
True
False
Answer:
False
Explanation:
Humans and plans do it as well
Answer:
False
Explanation:
Cellular respiration takes place in the cells of all organisms. It occurs in autotrophs such as plants as well as heterotrophs such as animals.
please answer fast! Which of the following statements are false?
A: In a chemical change, atoms are rearranged to make new compounds.
B: The same element is present before and after a chemical change.
C: A physical change does not produce an entirely new substance.
D: A chemical property can be observed without changing the identity of the substance.
I believe it is C.
Hope this helps!
We have 548 grams of CaCl2. How many molecules of CaCl2 do we have? (The molar mass of CaCl2 is 110.98 g/mol)
Group of answer choices
2.97 x 10^24 molecules
3.66 x 10^28 molecules
9.1 x 10^22 molecules
4.37 x 10^22 molecules
Answer:
Try everything
1.42 x 10^24 molecules
1.78 x 10^28 molecules
7.04 x 10^23 molecules
14.2 x 10^24 molecules
Explanation:
Which group in the food chain uses the energy of the sun to create its own food A consumers B predators C producers D prey
Answer:
C producers
Explanation:
All food chains start with energy from the sun. This energy is captured by plants. Thus the living part of a food chain always starts with plant life and ends with an animal. Plants are called producers because they are able to use light energy from the sun to produce food (sugar) from carbon dioxide and water.
Select the correct answer.
Which substance is most likely to form in a precipitation reaction?
A.
calcium nitrate
B.
copper(I) nitrate
C.
iron(I) chloride
D.
iron(II) sulfide
E.
potassium sulfate
Answer:
C.
Explanation:
Iron is most likely to form a precipitation reaction.
the spectral classes of four stars are shown in comparison with a Hertzsprung-Russell diagram. Based on the information which star is most like the sun?
Answer: star 3
Explanation: i did the test
Answer: star 3
Explanation:I did the test
Calculate AH for the following reaction.
C2H4(g) + H2(g) → C2H6(g)
(ΔHf° for C2H4(g) = 52.5 kJ/mol; ΔHf° for C2H6(g) = -84.7 kJ/mol)
a. -137.2 kJ
b. -32.2 kJ
c. 32.2 kJ
d. 137.2 kJ
Answer:
a.-137.2 kJ
Explanation:
If the first example symbol used is addition you can copy the plus and follow it how to solve the next!And also if the negative or positive sign.
Being able to curl your tongue is a recessive trait (t), while not being able to curl your tongue is a dominant trait (T).
Having curly hair is also a recessive trait (s), while having straight hair is a dominant trait (S).
Parent 1 can curl their tongue (tt) and also has straight hair (Ss). Parent 2 cannot curl their tongue (TT) and has
curly hair (ss). In your notebook, perform a dihybrid cross for these traits. Parent 1: ttSs Parent 2: TTSS
13
What are the Parent 1 gametes? (HINT: FOIL. There will be 4 genotypes)
14
What percent of offspring can curl tongue and have straight hair?
15
What percent of offspring cannot curl tongue and have curly hair?
What is the result of the following calculation? Record to the correct number of significant figures.
7.830 g x 1.041 = ?
Answer:
8.15103
g
x
Explanation:
The correct tool for measuring mass is ...
A. electronic balance.
B. ruler.
C. water displacement.
D. graduated cylinder.
Answer:
electronic balance
it should be electronic balance
Combustibles fosiles ¿Por qué son inflamables los gases naturales?¿Dónde están los gases naturales?¿Cómo podemos sacar el aceite?¿Dónde está el carbón?¿Es el combustible fósil una fuente no renovable? AYUDAA
Answer:
1) Los gases naturales son inflamables porque el natural contiene metano junto con una pequeña cantidad de otros gases orgánicos, lo que hace que una mezcla de entre 5 y 15% de concentración de gas natural con aire u oxígeno se queme por completo cuando se enciende.
2) El petróleo crudo, que son depósitos de hidrocarburos que se encuentran en depósitos naturales en las formaciones subterráneas de la Tierra, se obtiene perforando un pozo en el yacimiento de petróleo a través del cual se permite que una parte importante del petróleo fluya fuera del yacimiento bajo la presión del yacimiento para recibir procesamiento e instalaciones de almacenamiento en la superficie
3) El carbón se forma cuando se aplica compactación y calor a la turba que proviene de material vegetal muerto enterrado durante un período de varios millones de años.
4) Los combustibles fósiles se consideran una fuente de combustible no renovable porque la velocidad a la que se produce es más rápida que la velocidad a la que se forma.
Una fuente de energía renovable, como la energía eólica, es producida por la naturaleza tan rápido como se consume para generar energía.
Explanation:
please I'm not really sure.
Answer:
a pea!
Explanation:
Answer:
A pea
Explanation:
We already know a electron is smaller than a proton.
advantages of solar energy
How far does a car travel if its traveling 15 m/s for 28 seconds.
PLEASE HURRY IM TIMED Atoms are made up of electrons, neutrons, and____?
protons
compounds
mixtures
water
Answer: protons
Explanation:
A. Protons I learned this in class
What is "the cloud"?
A. The delivery of services and storage of data on multiple servers
using the Internet
B. A computer that provides services to and stores data but cannot
be accessed by other computers
O c. A system of devices that can communicate with one another
through analog signals sent through wires
D. A way to send analog data from one specific computer to another
computer that stores it as digital data
A
Explanation:
no proof just to know I'm internet gal