Answer: Some are solid, some are gaseous, a few are liquid. Some are metallic: they have a peculiar lustre; some are coloured (like sulfur) or colourless. Some have a low density; some have a high density. Some are malleable and ductile; some are brittle. Some conduct electricity and heat well; some don’t.
Many metals tend to have structural uses. Nonmetallic elements less so.
Metals tend to have crystal forms featuring close-packed centro-symmetrical structures. Nonmetallic elements tend to have crystal structures featuring more open and directionally packed structures.
Some are especially toxic; some are essential to life; some are both depending on exposure level.
Most are stable; some are less so.
Some elements are highly reactive; some are almost inert (helium, neon, and argon may be completely inert in ambient conditions).
Many metals have basic oxides; quite a few oxides of nonmetallic elements form acids when they are dissolved in water. Some elements can go both ways.
There are many generalisations you can make about metallic and nonmetallic elements, and quite a few exceptions at the margins.
Explanation:
State and explain the three basic properties of element.
Answer :-Some properties of an element can be observed only in a collection of atoms or molecules of the element. These properties include color, density, melting point, boiling point, and thermal and electrical conductivity.
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Answered by - ItzMaster
you have a gas that has a pressure of 2 atm and a volume of 10L. what would be the new volume if the pressure was changed to 1atm?
Answer:
20 Liters
Explanation:
Boyles Law => ΔP ∝ 1/ΔT => P₁V₁ = P₂V₂ => V₂ = P₁V₁/P₂
P₁ = 2 atm
V₁ = 10 Liters
P₂ = 1 atm
V₂ = ?
V₂ = 2atm x 10L / 1atm = 20 Liters
Don’t have to explain please just give me an answer
Answer:
the 3rd one is the answer
Calculate the mass in grams of 2.56 × 10 −3 mol of iron.
Answer:
1.43 grams
Explanation:
Fe = 55.8 grams Fe = 1 mole Fe
2.56 • 10^-3 moles Fe / 1 • 55.8 grams Fe / 1 mole Fe = 1.43 grams Fe
Basically, you're just multiplying the molar mass of Fe (iron) by the moles of 2.56 • 10^-3 Fe, to find how many grams are in it.
2.56 • 10^-3 moles Fe = 1.43 grams Fe
Which three of the following are the laws that Mendel discovered?
Law of Heredity
The Law of Segregation
The Law of Dominance
Law of Gravity
The Law of Independent Assortment
Answer:
genetics i.e the law of heredity
Answer:Mendel proposed three laws: Law of Dominance. The Law of Segregation. Law of independent assortment.
Explanation:Gregor Johann Mendel was a scientist who is recognized as the Father and Founder of genetics. Mendel conducted many experiments on the pea plant (Pisum sativum) between 1856 and 1863. He studied the results of the experiments and deducted many observations. Thus, laws of inheritance or Mendel’s laws of inheritance came into existence. Before learning about Mendel’s laws of inheritance, it is important to understand what the experiments performed by Mendel were.
HELP PLEASE
an unknown gas has a pressure of 121.6 kPa, a volume of 31 L and a Temperature of 256K. How many moles of gas
are there?
Answer:
0.031moles
Explanation:
ok so it would help if I knew the marks but 1 mole = 1000L so if the volume was 31L then if you convert you will get that answer
The moles of gas at the given sample of gas is 1.7 moles.
What is ideal gas equation?Ideal gas equation gives idea about the behavior of gas at different condition & represented as:
PV = nRT, where
P = pressure = 121.6 kPa = 1.2 atmV = volume = 31 Ln = moles = ?R = universal gas constant = 0.082 L.atm / K.molT = temperature = 256KOn putting all these values, we get moles as:
n = (1.2)(31) / (0.082)(256) = 37.2 / 20.9
n = 1.7 moles
Hence required moles of gas is 1.7 mole.
To know more about ideal gas equation, visit the below link:
https://brainly.com/question/555495
#SPJ2
Why do you think Newton’s cradle stops swinging? What does this imply about the energy in the system of pendulums?
HELP A #QUEEN OUT !!!!!!
Select the correct answer.
Which reaction is a decomposition reaction?
A.
2KClO3 → 2KCl + 3O2
B.
4Na + O2 → 2Na2O
C.
ZnS + 3O2 → 2ZnO + 2SO2
D.
2NaBr + CaF2 → 2NaF + CaBr2
Answer: 2KClO3 → 2KCl + 3O2
Explanation: it's the only one that was broken down into more parts than the start, the rest were simply reseperated
this one : 1 → 2
b : 1 + 1 = 2
c : xy+ wz → wy + xz
d : qwer +tyuio → qwui + tyero
ALSO I got it right
Image attached 50 points!
You know the number of moles of Mg that react: 6 moles.
You don't know (yet) how many moles of Mg₃N₂ are produced when 6 moles of Mg react.
The coefficients of each substance in the chemical equation tells us the molar ratio between the substances. The coefficient of Mg is 3, and the coefficient of Mg₃N₂ is 1 (coefficients of 1 are implied and omitted). So, for every 3 moles of Mg that react, 1 mole of Mg₃N₂ is produced.
We can use the proportion set up in the image to calculate the number of moles of Mg₃N₂ produced. In the first fraction, the green-boxed numerator should be our known number of moles of Mg, that is, 6 moles Mg. In the second fraction, we insert our molar ratio. Since we want the product of these two fractions to have the units "moles Mg₃N₂," the numerator in the second fraction should be 1 mole Mg₃N₂ and the denominator should be 3 moles Mg.
Our setup should look like this:
[tex]\frac{\textrm{6 moles Mg}}{1} \times \frac{\textrm{1 mole }\mathrm{Mg_3N_2}}{{\textrm{3 moles Mg}}} = \textrm{2 moles }\mathrm{Mg_3N_2}.[/tex]
Indeed, 2 moles of Mg₃N₂ are produced.
Answer:
2 moles of Mg₃N₂ are produced.
Explanation:
Sodium chlorate is used to produce yellow fireworks. Heating sodium chlorate creates oxygen and sodium chloride. How many moles of sodium chlorate is needed to produce 5.70 moles of oxygen?
https://www.geneva304.org/Downloads/ch%209%20key6.pd
this is what i found add an "f" at the end and search
If you have a cup of water at 35 degrees Celsius, and a bath tub of water at 35 degrees Celsius which will melt the most ice and why?
Clasifica cada uno de los siguientes incisos como sustancia pura (elemento y compuesto) o mezcla (homogénea y heterogénea). Explica brevemente. (a) arroz con leche (b) agua de mar (c) magnesio (d) gasolina
Answer:
Ver explicacion
Explanation:
Un arroz con leche es una mezcla heterogénea porque está compuesto por partículas sólidas de diferentes tipos y tamaños.
El agua de mar es una mezcla homogénea de sustancias todas en la misma fase.
El magnesio es una sustancia pura y es un elemento.
La gasolina es una mezcla homogénea de sustancias comúnmente utilizadas como combustible.
what ive learned about heat,sound and light
Answer:
they are all in parts of our life and we need them each for surviving.
Explanation:
ILL GIVE BRAINLEST
What does the half-life of a radioisotope correspond to?
Answer:
To describe the rate at which the isotope will decay and give off radiation.
Explanation:
How many moles are present in 5.24g of H2O?
Answer:
The answer is 18.01528.
We assume you are converting between grams H2O and mole.
Explanation:
???????????????????????
Answer:
B and D
Explanation:
Bc it has more fat than the other
1) Which New York State landscape region is located at 42 N, 75 W?
A) Erie-Ontario Lowlands
B) Hudson-Mohawk Lowlands
C) the Catskills
D) Tug Hill Plateau
Answer:C) the Catskills
Explanation:
Difine the term compound
Answer:
Its when like two pure substances are like combined into one.
Explanation:
Determine the volume of the product containing carbon produced when 15.0 g of C2H2 are reacted with an excess of oxygen gas
Answer:
25.8 L
Explanation:
Step 1: Write the balanced equation for the complete combustion of acetylene
C₂H₂ + 2.5 O₂ ⇒ 2 CO₂ + H₂O
Step 2: Calculate the moles corresponding to 15.0 g of C₂H₂
The molar mass of C₂H₂ is 26.04 g/mol.
15.0 g × 1 mol/26.04 g = 0.576 mol
Step 3: Calculate the moles of CO₂ produced from 0.576 moles of C₂H₂
The molar ratio of C₂H₂ to CO₂ is 1:2. The moles of CO₂ produced are 2/1 × 0.576 mol = 1.15 mol.
Step 4: Calculate the volume corresponding to 1.15 moles of CO₂
At standard temperature and pressure, 1 mole of CO₂ occupies 22.4 L.
1.15 mol × 22.4 L/1 mol = 25.8 L
Name the following base: NaOH
Answer:
Arrhenius Base
Explanation:
"NaOH is an Arrhenius base because it dissociates in water to give the hydroxide (OH-) and sodium (Na+) ions. An Arrhenius acid is therefore any substance that ionizes when it dissolves in water to give the H+, or hydrogen, ion. ... Acids provide the H+ ion; bases provide the OH- ion; and these ions combine to form water."
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Hope I Helped, Feel free to ask any questions to clarify :)
Have a great day!
More Love, More Peace, Less Hate.
-Aadi x
When the pressure is in a certain gas cylinder with a volume of 4.50 L reaches 500atm, the cylinder is likely to explode. If this cylinder contains 40.0 moles of argon at 25.0°C, is it on the verge of exploding? Calculate the pressure
Answer:
The cylinder is nit on the verge of exploding.
Explanation:
Temperature= 25.0°C
The conversion of T(°C) to T(K) is shown below:
T(K) = T(°C)+ 273.15
So,
T=(25.0 + 273.15) K = 298.15 K
Volume= 4.50 L
Moles= 40.0 mol
Using ideal gas equation as:
PV = nRT
where,
P is the pressure
V is the volume
n is the number of moles
T is the temperature
R is gas constant having value = 0.0821 Latm/ K. mol x 298.15 K
⇔ P= 217.58 atm
Pressure limit = 500 atm .
What plants need in order for photosynthesis to occur
A) Photosynthesis
B)Products
C)Chloroplasts
D)Glucose
Answer:
for photosynthesis to occur you need chloroplasts, light, water and carbon dioxide. hopefully that helps
⦁ Find the concentration of H+, OH-, PH and POH of 0.03 M of magnesium hydroxide which ionizes to the extent of only 1 /3 in aqueous solution.
Answer:
[tex]pH=12.3\\\\pOH=1.7\\[/tex]
[tex][H^+]=5x10^{-13}M[/tex]
[tex][OH^-]=0.02M[/tex]
Explanation:
Hello there!
In this case, according to the given ionization of magnesium hydroxide, it is possible for us to set up the following reaction:
[tex]Mg(OH)_2(s)\rightleftharpoons Mg^{2+}(aq)+2OH^-(aq)[/tex]
Thus, since the ionization occurs at an extent of 1/3, we can set up the following relationship:
[tex]\frac{1}{3} =\frac{x}{[Mg(OH)_2]}[/tex]
Thus, x for this problem is:
[tex]x=\frac{[Mg(OH)_2]}{3}=\frac{0.03M}{3}\\\\x= 0.01M[/tex]
Now, according to an ICE table, we have that:
[tex][OH^-]=2x=2*0.01M=0.02M[/tex]
Therefore, we can calculate the H^+, pH and pOH now:
[tex][H^+]=\frac{1x10^{-14}}{0.02}=5x10^{-13}M[/tex]
[tex]pH=-log(5x10^{-13})=12.3\\\\pOH=14-pH=14-12.3=1.7[/tex]
Best regards!
Baby Mice
Seif's pet mouse had babies. Five of the babies were black and two were white. The
father mouse was black. The mother mouse was white. Seif and his friends wondered
why the mice were different colors. These were their ideas
Jerome: Baby mice inherit more traits from their fathers than their mothers
Alexa: The baby mice got half their traits from their father and half from their mother.
Juner Male traies are stronger than female traits.
Seif Rack mke have more traies than white mice.
Fiona: The black baby mice are probably make and the white baby mice are probably
female
India, Paver in die for colo don't matter what whine will
Consider Seif and his friends responses/ideas. Answer the
following questions:
1. Which friend has the correct answer about how traits are inherited in this method of reproduction?
2. Is this type of reproduction asexual or sexual? How do you know? (use details from the texti
Answer:
I would say for #1 Fiona and for #2 sexual
Explanation:
Please give brailiest
A mass of 0.30 kg is attached to a spring that has a spring constant of 210 N/m. What will be the period of this system?
Answer:
its A hope this helps
Explanation:
PLEASE HELP!!!!! 10 POINTS!!
What electron could have quantum numbers n=3, l=0, ml=0, ms=-1/2
Answer:
Explanation:
It is a 3s electron
Materials that do not allow electrons to flow easily are called _____________.
Answer:
Materials that do not let current flow easily are called insulators.
Most nonmetal materials such as plastic, wood and rubber are insulators
What is the charge of a Li ion?
A. +1
B. +2
C. -1
D.-2
Answer:
A
Explanation:
because the charge of Li ion is +1 well I don't know the explanation yet but I'm sure about the answer
PLEASE HELO DOES ANYONE KNOW THE RIGHT ANSWER ??
Answer:
the last one because matter is the amount of space
How is a molecule and compound similar? How are they different from each other?
Answer:
A molecule is a group of two or more atoms held together by chemical bonds. A compound is a substance which is formed by two or more different types of elements which are united chemically in a fixed proportion. All molecules are not compounds. All compounds are molecules.
Explanation:
Compare a low-dose rate internal radiation treatment to a high dose rate internal treatment. What do you think are the positives and negatives of each?