Help!!!
Identify an element on the periodic table that is chemically similar to boron (B).
Answers
Answer:
Metalloid
Explanation:
A metalloid is a type of chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals. There is neither a standard definition of a metalloid nor complete agreement on the elements appropriately classified as such
Related Questions
Consider these scenarios. Scenario A: Carmen reads an article in Tasty Food magazine stating that eating an apple can help you feel awake and alert. Scenario B: Yuki reads an article in the Professional Journal of Medicine stating that ginger root can help prevent some types of cancer. Which article is more likely to have been peer reviewed? How do you know?
Answers
Answer:
Scenario B
Explanation:
In Scenario B; Yuki reads an article in the Professional Journal of Medicine stating that ginger root can help prevent some types of cancer. The article was published in a professional journal. Manuscripts sent to professional journals for publication must pass through a peer review process in order to ascertain the reliability of the data presented.
Magazine articles may not go through a peer review process since it is not written for the consumption of a professional audience.
Answer:
Sample Response: The article that Yuki read (Scenario B) has been peer reviewed. This article is published in a scientific journal and has been judged for quality by other professionals in the field.
Explanation:
How many hours are in 7 months? (assume 30 days in a month)
Answers
Answer:
there is about 5110.01 hours in 7 months
Explanation:
because no 7 months in a row have the same amount of months so about 730.001428571 days in 7 months times the number of months. Hope this helps!
Answer: 730.08 hours x 7= will get you your answer
Explanation: Because, the average month is 30.42 days. A day is 24 hours, so the average month is 730.08 hours ( 30.42 days * 24 hours ). Just do the math above and that should be your answer.
if 125g of KClO3 is heated, what is the total mass of the products?
Answers
Given parameters:
Mass of KClO₃ = 125g
Unknown:
Total mass of the products = ?
When KClO₃ is heated, it thermally decomposes to KCl and O₂ according to the chemical equation below;
2KClO₃ → 2KCl + 3O₂
All chemical equations obeys the law of conservation of matter and with this regard, we know that the amount of reactants used is the same as that of the product.
The total mass of the products must give us 125g according to this law of conservation of matter.
Now to find the masses of each product,
Find the number of moles of the given reactant:Number of moles = [tex]\frac{mass}{molar mass}[/tex]
molar mass of KClO₃ = 39 + 35.5 + 3(16) = 122.5g/mol
So number of moles of KClO₃ = [tex]\frac{125}{122.5}[/tex] = 1.02moles
2. Now, using this number of moles, find the number of moles of the products using this value;
2 moles of KClO₃ produced 2 moles of KCl
1.02 moles of KClO₃ will also produce 1.02moles of KCl
2 moles of KClO₃ produced 3 moles of O₂
1.02 moles of KClO₃ will produce [tex]\frac{1.02 x 3} {2}[/tex] mole = 1.53 moles of O₂
3. Now find the masses of each product;
Mass = number of moles x molar mass
molar mass of KCl = 39 + 35.5 = 74.5g/mol
molar mass of O₂ = 16 x 2 = 32g/mol
Mass of KCl = 74.5 x 1.02 = 75.99g
Mass of O₂ = 32 x 1.53 = 48.96g
Total mass of products = mass of KCl + Mass of O₂ = 75.99g + 48.96g
= 124.95g
This value is approximately the same as that of mass of KClO₃
What do mass and weight have in common?
Answers
Answer:
Mass is a measure of how much matter an object contains, while weight is a measure of the force of gravity on the object. An object has the same composition, and therefore mass, regardless of its location.
Explanation:
four large grocery food chains sell approximately how much of the nations food
Answers
100 percent one-half one-fourth three-fourths.
(got it off google sorry if it is wrong)
one-half
got it right on the quiz
What did Dalton determine about the relationship between atoms, elements, and compounds?
Answers
Answer: got on xbox
Explanation:
Your cross country skis are 210 cm long. What is their length in inches?
Answers
210 cm converted into inches is 82.67716535 in.
Which ion was formed by providing the second ionization energy to remove an electron?
Ca2+
N3–
Fe3+
S2–
Answers
Answer:
Ca2+
Explanation:
I took the test lol
Answer:
Ca2+
Explanation:
i just did the test
A piece of aluminum has a volume of 12 cm3and a mass of 32 g. What is its density? Do not forget the units.
Answers
Answer:
The answer is 2.67 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of metal = 32 g
volume = 12 cm³
The density is
[tex]density = \frac{32}{12} = \frac{8}{3} \\ = 2.6666666...[/tex]
We have the final answer as
2.67 g/cm³Hope this helps you
Answer:
2.67g/cm or 2.67g/cc
Explanation:
When a piston is pushed down on a cylinder, the pressure on the gas in the cylinder increases from 125 kPa to 375 kPa. The initial volume is 3.3 L. What is the final volume?
Answers
Answer:
The final volume is 1.1 L.
Explanation:
Given data:
Initial pressure of gas = 125 KPa
Final pressure of gas = 375 KPa
Initial volume = 3.3 L
Final volume = ?
Solution:
The given problem will be solved through the Boly's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
125 Kpa × 3.3 L = 375 Kpa × V₂
V₂ = 412.5 KPa. L/375 Kpa
V₂ = 1.1 L
The volume of gas is reduced to the 1.1 L because of increasing pressure.
A group 5A element:
actinium
arsenic
rhenium
Answers
Answer:
ARESENIC is in the 5A category
Explanation:
edge 2020
5A (Nitrogen group) elements tend to react to gain 3 electrons to be like noble gas.
What is 5A group element?5A group known as nitrogen group. In these group elements contains nonmetals, metals, halogens, noble gases and metalloids.
These elements react with oxygen to form acidic compounds.
Configuration of 5A group: 2s2 2p3, 3s2, 3p2
Example: nitrogen, phosphorus, arsenic etc.
Actinium (Ac) atomic number = 89 (it is a silvery radioactive metallic material. Actinium-227 is extremely radioactive element).
Arsenic (Ar) atomic number = 33 (it found in many minerals usually in combination of sulfur and metals but it also found in pure elemental crystal. It is a metalloid).
Rhenium (Re) atomic number = 75 (it is found in earth crust. It is used in additive to tungsten and molybdenum-based alloys. It is very toxic to humans it may causes skin related disease).
Therefore, 5A (Nitrogen group) elements tend to react to gain 3 electrons to be like a noble gas.
Learn more about 5A group element, here:
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Which one has more density?
Concrete Block
Styrofoam
Answers
Answer:
Concrete block has more density
Which of the following is FALSE about the atomic models and subatomic particles?
Which of the following is FALSE about the atomic models and subatomic particles?
a
J. J. Thompson discovered the electrons using the Cathode Ray Tube and proposed electrons were randomly scattered inside the atom.
b
John Dalton's model of the atom was a solid that was divisible into subatomic particles
c
In Schrodinger and Heisenberg's combined model of the atom, electrons were both particles and waves at the same time.
d
Rutherford's model was the first to include a positively charged nucleus at the center of the atom.
Answers
Answer:
all i know is that its not D ... good luck luv lol
Explanation:
Signs of a chemical change
Answers
Answer: There are five signs of chemical change
Color ChangeProduction of an odorChange of TemperatureEvolution of Gas (bubbles start to form)Precipitate (starts to form a solid)When these signs start to form you know chemical change is at work.
Hope this helps :)
Wat is atomic in science
Answers
hay una cosa llamada google usarlo dummby!
What is an element?
Answers
a component or constituent of a whole or one of the parts into which a whole may be resolved by bricks and mortar are elements of every masonry wall.
Answer:
An essential part of something abstract.
What is the difference between a number and a measurement ?
Answers
Answer:An exact number has absolutely no uncertainty in it. Exact numbers cannot be simplified and have an infinite number of significant figures. Measured numbers have a limited number of significant figures.
Explanation:
What is an open system?
O
A. A system that allows energy and mass to move in and out of it
B. A system that allows mass to move in and out but not energy
O
C. A system that does not allow energy or mass to move in or out of
it
O D. A system that allows energy to move in and out but not mass
Answers
Answer:
A system that allows energy and mass to move in and out of it.
APEX
A. A system that allows energy and mass to move in and out of it.
The correct definition of an open system is option A.
A system that permits both energy and matter (mass) to enter and exit is referred to as an open system. An open system is one in which energy and matter are exchanged with the environment, allowing the system to interact with and be affected by outside forces.
In opposition:
B. While energy cannot travel in or out of a closed system, mass can. Only energy, not matter, may be exchanged with the environment in a closed system.
C. An isolated system prevents the entry or exit of energy or mass. It does not interchange any energy or material with its surroundings because it is entirely self-contained.
D. It is uncommon to classify a system that permits energy to enter and exit but not mass. It defies the idea of an open system, where both energy and matter can enter and exit, and it does not reflect any particular kind of system.
To know more about energy:
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17. Is the scientific method suitable for solving problems only in
the sciences? Explain.
Answers
Answer:
Hey mate
Explanation:
Yes these methods are only used in biology, chemistry, physics, geology and physcology.... They can't be used in maths or other subject, as it is said SCIENCE IS SCIENCE!
Hope it helps you,
mark me the brainliest,
follow me
look at the image djsksk
Answers
You poor human djsksk-
Answer:
The first one is qualitative.
Second one is quantitative.
Third one is qualitative.
Fourth one is quantitative.
Explanation:
Quantitative data is information about quantities; that is, information that can be measured and written down with numbers. Qualitative data is information about qualities; information that can't actually be measured.
I hope this helps! <3
~Sakura Hitoroku
name the fuel used in rockets
Answers
How is raw steel made and how is it different from raw iron?
Answers
PLEASE HELP!!!!!!!
WILL GIVE BRAINLIEST!!!!!
Describe a volcanic eruption.
Answers
Answer:
A volcanic eruption occurs when molten rock, ash and steam pour through a vent in the earth's crust. Volcanoes are described as active (in eruption), dormant (not erupting at the present time), or extinct (having ceased eruption; no longer active).
Please mark as brainliest please
What is the equation for density?
m
O DE
V
O D= V
m
m
O D =
DE
= 1 mu
D =
Answers
mass divided by volume
Answer: This may not work for you
Explanation: Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.
Chemical engineers who specialize in negotiating for large purchases and instructing customers in use of the products are:
corporate managers
legal services
product developers
marketing personnel
Answers
Answer:
d
Explanation:
If you have an initial water level in a graduated cylinder of 15 mL and your
final water level after placing a 2g aluminum piece of metal in it is 19 mL,
what is the density of the aluminum in g/mL?
Formula? Work? Answer?
Answers
Answer:
The answer is
0.5 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of aluminum = 2 g
volume = final volume of water - initial volume of water
volume = 19 - 15 = 4
volume = 4 mL
The density of the metal is
[tex]density = \frac{2}{4} = \frac{1}{2} \\ [/tex]
We have the final answer as
0.5 g/mLHope this helps you
what is a protons mass
Answers
Answer:Proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge
Explanation:
A proton has a mass of about 1 amu
Which of the following statements is correct about the force of gravity between two objects?
A. it depends on the shape of the objects.
B. It is weaker when the objects are closer.
C. It depends on the temperature of the objects.
D. It is stronger when the objects are closer.
Answers
Answer: D
Explanation:
Shape and temperature have nothing to do with gravity. You could take a circle block and a square block and put it on the ground and they will stay there. Gravity is not weaker when objects are closer together because of Newtons law of gravitation.
Answer:
givve them brainliest
Explanation:
Hydrogen has an average atomic mass of 1.008 amu and has 3 known isotopes
(Hydrogen-1. Hydrogen-2, and Hydrogen-3), which isotope is the most abundant? Justi
Answers
Answer:
Hydrogen-1
Protium is the most abundant isotope of hydrogen.The abundances of protium, deuterium and tritium are 99.984%,0.016% and 10 to the power –15 respectively.
Unlike animal cells, plant cells have
a
Chloroplasts, Cell Wall, and 1 Large Vacuole
b
Cell Wall, Mitochondria, and Many small Vacuoles
c
Chloroplasts, Cell Wall, and Mitochondria
Answers
Answer:
b
Explanation:
Answer:
A. Chloroplasts, Cell Wall, and 1 Large Vacuole
Explanation:
Because they are plants, theres no other reason
