Answer: helium has the largest first ionization energy, while francium has one of the lowest.
Explanation:
The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.
Answer:
Helium has the highest
Explanation:
What type of energy is used to form a chemical bond?
Solar energy
Free energy
Stored energy
Heat energy
Heat energy
I thing it's that? ok will hope you have a good day :)
how many moles are equivalent to 4.151 x 10^25 particles of lithium?
Answer:
68.95moles
Explanation:
Given parameters:
Number of particles of lithium = 4.151 x 10²⁵ particles
Unknown:
Number of moles = ?
Solution:
From the mole concepts, we know that;
6.02 x 10²³ particles are contained in 1 mole of a substance
4.151 x 10²⁵ particles contains [tex]\frac{4.151 x 10^{25} }{6.02 x 10^{23} }[/tex] = 68.95moles
8. Which type of bond results when one or more valence
electrons are transferred from one atom to another?
A) a hydrogen bond
B) an ionic bond
C) a nonpolar covalent bond
D) a polar covalent bond
Answer:
B
Explanation:
How many moles of atoms in 22.5 g Zn
Answer: 1 mol of Zn is 65.38g
Explanation: To find the number of moles of Zn, we divide the given amount of Zn by the molar mass of Zn. Hence, 1.34 g of Zn contains 0.020 moles of Zinc.
0.34 mole of atoms in 22.5 g Zn.
What are moles?A mole is defined as 6.02214076 × [tex]10^{23}[/tex] of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
To find the number of moles of Zn, we divide the given amount of Zn by the molar mass of Zn.
[tex]Moles = \frac{mass}{molar \;mass}[/tex]
[tex]Moles = \frac{22.5}{65.38 u}[/tex]
Moles = 0.34 mole
Hence, 0.34 mole of atoms in 22.5 g Zn.
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which of the following is the best description of an elment
A. A substance that cannot be broken down into simpler substance
B. A small particle made with a specific chemical composition
C. A naturally occurring mineral made of more than one substances
D. A collection of atoms that have different abilities when joined together
Answer:
d
Explanation:
atoms join together to produce elements
Answer:
An element is a substance whose atoms all have the same number of protons: another way of saying this is that all of a particular element's atoms have the same atomic number. Elements are chemically the simplest substances and hence cannot be broken down using chemical reactions.
Explanation:
What is the oxidation number for Ba?
A. +1
B. -2
C. +2
D. -1
Answer:
+2
Explanation:
Ba is present in group 2 and group 2 show + oxidation state
Help Me ASAP! Looking at the picture above which images would be best classified as molecules?
Answer:
B
Explanation:
Answer:
C) B AND C
Explanation:
points
A student rings a brass bell with a frequency of 300 Hz. The sound wave
travels through brass, air, and glass. What is the wavelength of the wave in
brass?
Medium
Wave speed
(m/s)
Brass
4,700
Air
346
Glass
5,640
A. 0.64 m
B. 1.6 m
C. 0.064 m
D. 16 m
The wavelength of the wave in brass medium, given that the wave has a frequency of 300 Hz is 16 m (Option D)
How do I determine the wavelength in brass?The wavelength of a wave is defined according to the following formula:
Velocity (v) = wavelength (λ) × frequency (f)
Divide both sides by frequency
Wavelength (λ = Velocity (v) / frequency (f)
With the above formula, we can obtain the wavelength of the wave in the brass medium. Details below:
Frequency (f) = 300 HzWave speed in brass (v) of = 4700 m/sWavelength in brass (λ) = ?Wavelength (λ = Velocity (v) / frequency (f)
Wavelength in brass = 4700 m/s / 300 Hz
Wavelength in brass= 16 m
Thus, we can conclude that the wavelength is 16 m (Option D)
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The molecules in a gas
Answer:
? which gas, explain further
Explanation:
Something that is made out of natural resources for human use is called
Answer:
Man-made resources
Explanation:
Humanized resources are items or substances that have value to human lives that do not occur in the natural world. Examples of man-made resources include plastic, paper, soda, sheet metal, rubber and brass. These contrast with natural resources, such as water, crops, sunlight, crude oil, wood and gold.
PLEASE HELPP! EXPLAIN UR ANSWER AND ILL GIVE BRAINLIEST
Answer:
false it removes carbon dioxide ......The heart pumps blood to all parts of the body. Blood provides oxygen and nutrients to the body and removes carbon dioxide and wastes. As blood travels through the body, oxygen is used up,
Explanation:
Oxygenated blood travels from the lungs through the pulmonary veins and into the left side of the heart, which pumps the blood to the rest of the body (see Function of the Heart). ... Then the blood is pumped through the pulmonary artery to the lungs, where it picks up oxygen and releases carbon dioxide.
Answer:
true because your heart contains blood that flows through you body system
What is the mole ratio of water (H20) to phosphoric acid (H3PO4)?
P.010 + H2O 4H3PO4
Before
After
Р
4
(4) - 4
4(4) - 16
O 10+1
H
2
3(4) - 12
1:1
46
6:4
2:2
Answer:
the answer to this problem is before
Explanation:
is mass conserved in 2Na+2H2O=2NaOH+H2
Answer:
yes mass conservation is in 2Na+2H2O=2NaOH+H2
Explanation:
it tells how many atoms or molecules of a reactant or a product take part in the reaction
Oxygen-16 and Hydrogen-1 Are they becoming positively or negatively charged ions to gain stability?
they are becoming negatively charged.
Please help. Thank you:)
Many earthquakes occur along the edges of continents that surround the Pacific Ocean. This area is called the Pacific Ring of Fire. Why does this region have so many earthquak
O A. The water in the Pacific Ocean is very heavy and pushes down on the Earth.
O B. Landslides are common along the steep Pacific Ocean coastlines.
O C. Plate boundaries occur along the edges of the Pacific Ocean.
OD. Strong typhoons are common in the Pacific Ocean.
Answer:
c
Explanation:
the plate tectonics collide there a lot
Please answer 14 will give brainliest
Answer:
I think it's alkali metals
Answer:
[tex]its \: fluorine \: and \: it \: belongs \: to \ : \\ 17th \: family \: noble \: gases[/tex]
Name the type of chemical reaction.
NaBr + H3PO4 → Na3PO4 + HBr
Answer:
double displacement (metathesis) hope that helps!(^_^メ)
Explanation:
meh.
1.Let's say you could see inside of the nucleus of a Silver atom and inside the nucleus of a Cobalt atom. How would they look different?
2.If a substance has no (or almost no) likelihood of undergoing a chemical reaction with another element it is said to be:
a.Ionized
b.Malleable
c.Reactive
d.Inert
e.An Isotope
3. Evaluate this sentence and explain why it is incorrect:
“Neon came into contact with Iron and the reaction was very explosive.”
4. Mr. Carney does and experiment. He weighs himself. He weighs 210 lbs. He then runs 15 miles. Then weighs himself. He now weighs 200 lbs.
Explain the conservation of mass using this experiment as your example.
NEED ANSWERS NOW DUE TODAY
4 Na + O2 → 2 Na2O
6.79 moles of O2 will react to form how many moles of Na2O?
Answer:
13.94moles of Na₂O
Explanation:
The balanced reaction expression is given as:
4Na + O₂ → 2Na₂O
Given parameters:
Number of moles of O₂ = 6.97moles
Unknown:
Number of moles of Na₂O
Solution:
To solve this problem;
1 mole of O₂ will produce 2 moles of Na₂O ;
6.97 moles of O₂ will produce 6.97 x 2 = 13.94moles of Na₂O
10 Look carefully at the picture. it shows an electron in the excited state on the left, and the
electron returning to its ground state on the right. When the electron return to the ground state it
emits
photon
excited state
ground state
a) blast of cold air
c) proton
b) electrostatic charge
d) photon (light)
An elephant and a parakeet standing on ledge will have a different amount of potential energy because of their . this is for science actually
Answer:
Mass
Explanation:
1. How many moles of nitrogen gas are in 1.54x10^26 molecules? How many atoms?
2. How many molecules of water are in 3.45 moles of water?
3. How many atoms of C are in 2.00 moles of Cv6Hv12Ov6? (v means the number is below)
Answer:
Try everything
1. How many moles of nitrogen gas are in 1.54x10^26 molecules? How many atoms?
2. How many molecules of water are in 3.45 moles of water?
3. How many atoms of C are in 2.00 moles of Cv6Hv12Ov6? (v means the number is below)
Explanation:
A chemical formula is shown the subscription in a chemical formula represent the
Answer:
A, option is the correct answer of this question
WILL GIVE BRAINLIEST!!
A magnetic globe is being held down on a base. When released, the globe rises above the base and eventually comes to rest floating above the base.
In which position shown does the globe have the greatest magnetic potential energy?
Answer:
It is position 3
Explanation:
Because the further the magnets are the higher the potential energy, and in position 3 the globe is the furthest from the base meaning that in base 3 the magnetic potential energy is the highest or greatest there.
what volume of 0.20 M NaCl contains 10.0 g
What valence electron number do they all have in common
How many atoms are in 4.5 g of AICI3?
Answer:
2.047 × 10^22 atoms.
Explanation:
To calculate the number of atoms (nA) in AlCl3, we first need to find the number of moles in the compound, AlCl3.
Molar mass of AlCl3 = 27 + 35.5(3)
= 27 + 106.5
= 133.5g/mol
Using mole = mass/molar mass
mole = 4.5/133.5
mole = 0.034moles
number of atoms in a substance (nA) = number of moles (n) × Avagadros number or constant (6.02 × 10^23 atoms)
nA of AlCl3 = 0.034 × 6.02 × 10^23
nA = 0.2047 × 10^23
nA = 2.047 × 10^22 atoms.
What animal did Darwin study in the Galapagos Islands?
1. Yellow fin tuna
2. Spiders
3. Hawks
4. Finches
Answer:
The answer is 4.
Explanation:
Finches.
Answer:
4. Finches
Darwin studied the forms of the beak, and found that they were different based on what they ate.
If one mole of an unknown substance is 200.59 g/mole, what is the mass of 0.33 moles of that substance?
Answer: 66.83g
Explanation: (200.59 g/mole = Hg)
0.33 moles = 66.83g