Answer:
For example, the atomic radius of the metal zirconium, Zr, (a period-5 transition element) is 155 pm (empirical value) and that of hafnium, Hf, (the corresponding period-6 element) is 159 pm. ... The increase in mass and the unchanged radii lead to a steep increase in density from 6.51 to 13.35 g/cm3.
Explanation:
what is the molarity of 5.63 moles of lithium in 3.25 liters of solution
Answer:
1.73 Molar
Explanation:
The formula is Molarity=moles of solute/liters of solution, which can be written in whatever way you prefer, and examples include: M=N/V or M=mol/L.
M=N/V
M= [tex]\frac{5.63}{3.25}[/tex]
Divide 5.63 by 3.25. When you calculate this, you get 1.73, therefore your answer is 1.73 molar.
What is the atomic number of an isotope with the following symbol:
20 F
Answer:9
Explanation:
F is Flourine on the periodic table; the atomic number of Flourine is 9
caution: when you say “20 F” your meaning is unclear. regardless of what you mean, though, the atomic number of F is 9
An isotope of an element has 95 protons and 146 neutrons. What is the symbol for this
element?
Answer:
238 is the answer
Explanation:
238 - 146 + 3 = 95
Americium (95Am) is an element that has 95 protons and 146 neutrons in its nucleus of an atom.
What is Americium (95Am)?Americium is an element that has 95 protons and 146 neutrons. Its symbol is Am. Its atomic mass is 241 amu which is get by addition of proton and neutron.
So we can conclude that Americium (95Am) is an element that has 95 protons and 146 neutrons in its nucleus of an atom.
Learn more about isotope here: https://brainly.com/question/364529
8. Look at the following electronic configurations of elements and predict which element has the highest electron affinity? Explain your answer. [ /3A]
a. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4
b. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5
c. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
d. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1
e. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2
Answer:
e, beacause that is the higher voltage
Explanation:
calculate
Two different gases are stored inseparate closed containers. If both gases have a temperature of 50°C, which
statement is true?
Answer:
Explanation:
there should be more showing than telling
HELP IM BEING TIMED
What type of weather can Georgia expect in the next 12 hours?
A light rain or drizzle
B heavy precipitation or thunderstorms
C many days of rain, snow, or fog
D sunny, clear, and windy
Answer: I think it's B
Which group in the periodic table contains the lightest ferromagnetic element?
Question 12 options:
A)
Group 9
B)
Group 8
C)
Group 10
D)
Group 7
The answer is B) Group 8 .
The microscope has the power to show details of
an object more clearly. This is known as
Answer:
Explanation:
in order for the user to clearly view an image, the microscope must carry out two processes. ... the ability of the microscope to increase the size of the image of an object is called______. magnification. the microscope has the power to show details of an object more clearly.
The power of a microscope to show details of an object more clearly is: resolution.
A microscope can be defined as an optical device which is typically designed and developed to make an enlarged (magnified) image of a minute (very small) object, in order to show all the littlest or tiniest details (information) about the object that cannot be seen by the natural human eye.
Generally, the different types of microscopes include:
Inverted microscope.Compound light microscope.Scanning electron microscope.Polarizing microscope.In Science, the resolution of a microscope is a measure of its power to clearly show the details of an object.
Read more: https://brainly.com/question/20376243
What is the formula for sulfate?
What is the charge of sulfate?
What is the correct formula for copper (II) sulfate?
Answer:
SO₄²-, -2, CuSO4
Explanation:
Dang that was long.
What volume of ammonia (NH3) will react completely with 25.0 liters of O2? 4 NH3 + 3 O2 ---> 2 N2 + 6 H2O
Answer:
18,75 litres
Explanation:
4 NH3 + 3 O2 ---> 2 N2 + 6 H2O
n (NH3) : n (O2) = 4 : 3
<=>
V (NH3) : V (O2) = 4 : 3
Hence, V(O2) = 3 × V (NH3) ÷ 4 litres
V(O2) = 3 × 25.0 ÷ 4 litres
V(O2) = 75 ÷ 4 litres
V(O2) = 18,75 litres
If you have any questions, feel free to ask :)
1.
Archaeologists have discovered the legendary Golden Igloo of the Pribiloff Islands, a structure consisting of a
halfspherical shell with an inner diameter of 1.25 m and an out diameter of 1.45 m. What is the value of this antiquity,
given that gold currently sells for $1,263/ounce and has a density of 19.3 g/cm3? (Note that 1 ounce = 31.1034768 g)
Answer:
The value of the Golden Igloo is $227.4 million.
Explanation:
First, we need to find the inner and the outer volume of the half-spherical shell:
[tex] V_{i} = \frac{1}{2}*\frac{4}{3}\pi r_{i}^{3} [/tex]
[tex] V_{o} = \frac{1}{2}*\frac{4}{3}\pi r_{o}^{3} [/tex]
The total volume is given by:
[tex] V_{T} = V_{o} - V_{i} [/tex]
Where:
[tex] V_{i} [/tex]: is the inner volume
[tex]r_{i}[/tex]: is the inner radius = 1.25/2 = 0.625 m
[tex] V_{o} [/tex]: is the outer volume
[tex]r_{o}[/tex]: is the outer radius = 1.45/2 = 0.725 m
Then, the total volume of the Igloo is:
[tex] V_{T} = \frac{2}{3}\pi r_{o}^{3} - \frac{2}{3}\pi r_{i}^{3} = \frac{2}{3}\pi [(0.725 m)^{3} - (0.625 m)^{3}] = 0.29 m^{3} [/tex]
Now, by using the density we can find the mass of the Igloo:
[tex] m = 19.3 \frac{g}{cm^{3}}*0.29 m^{3}*\frac{(100 cm)^{3}}{1 m^{3}} = 5.60 \cdot 10^{6} g [/tex]
Finally, the value (V) of the antiquity is:
[tex] V = \frac{\$ 1263}{oz}*5.60 \cdot 10^{6} g*\frac{1 oz}{31.1034768 g} = \$ 227.4 \cdot 10^{6} [/tex]
Therefore, the value of the Golden Igloo is $227.4 million.
I hope it helps you!
What is the key difference between a liquid and a gas?
A. average kinetic energy
B. intermolecular attractions
C. the ability to flow
B. intermolecular attractions.
Write the position of metals, non - metals and metalloids in the periodic table.
Answer:
The metals are to the left of the line (except for hydrogen, which is a nonmetal), the nonmetals are to the right of the line, and the elements immediately adjacent to the line are the metalloids.
Balance the following equation:
Sg + F2 --> SF
Answer:
S+ F2 ⇒ SF
S=1
F =2
So S +F2 ......... 2SF
2S + F2 ..........2SF this is a balance equation
S=2 F=2 in left side s=2 F = 2 in rightside
Explanation:⇆
⇒
20 points to whoever can answer these 3 questions correctly
Answer:
1) A. NO
2) B. 4
3) D. 8
Explanation:
តើកាបូនមានវ៉ាឡង់ប៉ុន្មាន
Answer:
uuuhhh?
Explanation:
answer for brainlist and extra points!!
Answer:D
Explanation:
Which of these is NOT found in the earths crust?
Oxygen
Iron
Sulphur
Helium
Explanation:
helium
Helium gas is not found in earth crust
When would scientists need to change a theory?
Answer:
if it cannot be made to fit the new findings
Answer:
As additional scientific evidence is gathered, a scientific theory may be modified and ultimately rejected if it cannot be made to fit the new findings; in such circumstances, a more accurate theory is then required.
Explanation:
please follow me
iammallikaSelect the correct answer.
What is the chemical formula of calcium chloride?
A.
CaCl
B.
Ca2Cl2
C.
Ca2Cl
D.
CaCl2
Answer:
D.CaCl2
Explanation:
Answer:
ans is D because the velency of calcium is 2 and clorine is 1 if we do cross multyply then it is option d7. A small stone added to boiling liquids to make them boil more evenly without sudden violent releases of
vapours are called
Answer:
A boiling chip, boiling stone, porous bit or anti-bumping granule is a tiny, unevenly shaped piece of substance added to liquids to make them boil more calmly.
These help in making the liquid boil more easily
Answer:
umm i think it's called boiling chip
10.Give an example of an adaptation in birds, where shape of beak is related to the eating habits of that bird.
Answer:
It isn't only for the eating habits but also for building nests, hunting small insects, birds, other creatures including defence. Birds have a narrow small throat so the beak helps ripping off small peices of a big animal l(small bird) and for insects they crush and swallow it, they se their beak for feeding their children by grinding food in their beak and transferring it to the youngsters mouth
I gotta pick 4 last question to pass :,) pls help:>
whoever answers first will be marked brainliest unu
Answer:
Explanation:
heat up the solvent
increse the pressurre of the mixture
add more solute
agitate
Why aren't acid-base reactions considered redox reactions, even though they involve the transfer of hydrogen atoms?
Answer: Acid/base and precipitation reactions almost always are NOT redox reactions. For redox to have happened, the number of electrons that an element has must change (i.e. its oxidation state must change). ... But the hydrogen ion never "has" any electron throughout the process and remains in a +1 oxidation state.
Explanation:
let me know if that helped...(☞ﾟヮﾟ)☞
Acid-base reaction is not a redox reaction, since the oxidation number remains unchanged in acid-base reaction.
What is acid-base reaction?An acid-base reaction is the chemical reaction that occur when acids and bases react together.
What is redox reaction?Redox reaction is a reaction that involves the transfer of electrons between the atoms, ions, or molecules.
Acid-base reactions involve the transfer of hydrogen ions between reactants. Redox reactions involve a change in oxidation number for one or more reactant elements.
Redox reactions involve a change in oxidation number for one or more reactant elements.
Acid-base reactions involve a transfer of a hydrogen ion instead of an electron and the transfer of an H+ ion leaves the oxidation numbers unaffected.
To learn more about acid-base and redox reaction here
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What is the different things that we have and animals?
Answer:
the different things that we have and animals are.:
to gain emotional support.it acts as a real friend.for meat,flesh,milk and milk products, wool,etc.for transportation like horseto enjoy and play like with dolphinsThe two basic types of air pollutants are _____.
liquids
invisible
particulates
gases
Answer:
particulates and gases
Explanation:
The tectonic plates float on the lower portion of Earth's crust?
Answer:
The tectonic plates comprise the bottom of the crust and the top of the Earth's mantle. There are ten major plates on Earth and many more minor ones. They float on a plastic-like part of the Earth's mantle called the asthenosphere.
Explanation:
Answer:
Yes
Explanation:
Mention the reason why aquatic plants have air filled tissues.
Answer:
Aquatic plants have aur filled tissues to make them easy to float.....
Explanation:
It provides buoyancy
What term is used when heat is absorbed by a reaction, thus leaving the surroundings colder
Please please help me!!!! I WILL GIVE BRAINLIEST
Answer:
20.0 sec
you can use ln (2)=k* t1/2 then ln N2/N1=-k(t2-t1)
or just divide 100 by 2 then 50 by 2 then 25 by 2 then 12.5 by 2 and that is 4 half lifes at 5 secs each
Explanation: