The substances composed of atoms that all have the same number of protons are called elements.
What are the names of substances made up of atoms with the same number of protons?
The substances which are made up of atoms with the same numbers of protons are called as element.
An element is a substance with the same number of protons in all of its atoms. Gold is an example of an element. A pure gold bar is made up of only one element, gold.
All matter is composed of substances known as elements, which have distinct chemical and physical properties and cannot be broken down into other substances via ordinary chemical reactions.
Gold, for example, is an element, as is carbon. Only 92 of the 118 elements occur naturally. The remaining elements are unstable because they were only created in laboratories.
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differences between alkalis, bases and acids? (answer for many points :) )
Explanation:
protons.
An acid can also be thought of as a chemical that can neutralize a base. Similarly, a base can neutralize an acid.
Acids turn litmus paper red, while bases make litmus paper turn blue.
Some examples of acids are sulfuric acid, hydrochloric acid, nitric acid, and so on. Some examples of bases are sodium hydroxide, potassium hydroxide, and so on.
Acids generally taste sour, while bases have a bitter taste.
Alkalis are the bases that are water-soluble, which means that they dissolve in water. In other words, not all bases are water-soluble, and only the water-soluble bases are known as alkalis. An example of an alkali is sodium hydroxide. It is a base because it can neutralize an acid, and because it is water-soluble, it is an alkali. An example of a base that is not alkali is copper oxide. This chemical can neutralize an acid, but it is insoluble in water.
In other words, all alkali are bases but not all bases are alkalis.
Also, an alkali has a hydroxide group, while a base has an oxide group in it.
what best describe the process of percipitation in the water cycle
Answer:
Precipitation is water released from clouds in the form of rain, freezing rain, sleet, snow, or hail. It is the primary connection in the water cycle that provides for the delivery of atmospheric water to the Earth. Most precipitation falls as rain.
Explanation:
list 10 uses of composite
Aerospace
Thermoset composites are being specified for wings, fuselages, bulkheads, and other applications in commercial, civilian and military aerospace applications.
Appliance/Business
Thermoset composite are being used in frames, equipment panels, handles and trims in appliances, power tools, business equipment and many other applications.
Thermoset composites for the appliance industry are used in washers, dryers, refrigerators, freezers, ranges, ovens, dishwashers for components that include control panels, handles, knobs, vent trims, side trims, motor housings, kick plates and many others.
Automotive/Transportation/Farm/Construction
Composites are now being used in vehicle and equipment applications, including, panels, frames, interior components and other parts.
Civil Infrastructure
Some composite infrastructure applications include buildings, roads, bridges and pilings.
Construction
Thermoset composites are replacing many traditional materials for home and offices architectural components including fixtures, doors, wall panels, roofing, window frames, moulding, vanity sinks, shower stalls and even swimming pools.
Corrosive Environments
Composites are ideal for applications in corrosive environments, such as chemical processing plants, pulp and paper converting, oil and gas refineries and water treatment facilities. Common applications include fans, grating, tanks, ducts, hoods, pumps and cabinets.
Electrical
With strong dielectric properties including arc and track resistance, Thermoset components include substation equipment, microwave antennas, standoffs and pole line hardware and printed wiring boards. Applications and components include switchgear, motor controls, standoff insulators, control system components, circuit breakers, arc chutes, arc shields, terminal blocks, terminal boards, metering devices, bus supports and lighting components.
Marine
With their corrosion resistance and light-weighting attributes, Marine composite applications include boat hulls, bulkheads and other components for military, commercial and recreational boats and ships.
When the equation Al2(SO4)3 + NaOH + Al(OH)3 + Na2SO4 is correctly balanced, what is the coefficient of Al(OH)3?
How do plants get their food molecules??
Answer:
Photosynthesis
Explanation:
Plants get energy/food molecules from a process called Photosynthesis
Steps Of Photosynth's -
The Reactants collect in the chloroplast. ( Carbon Dioxide, Water, Energy ) Light Energy from the sun drives Chemical Reactions.The Reactants Include glucose and oxygen which is released into the air.
Hope This Helps!
-Aslina <3
2 NaOH + H2SO4 ------> 2 H2O + Na2SO4
How many moles of H2O can be produced from 12.5 moles of NaOH?
Explanation:
2moles of NaOH -> 2moles of H2O
so the number of moles r equal.
hence moles of H2O is 12.5
if youre good at chemistry u better help me now please!
Answer:
letter B is the answer
Explanation:
just take a look at the atoms
Answer:
B.) Only elements have one kind of atom.
Explanation:
An element consists of only one type of atom, while a compound consists of two or more types of elements
Q.1 Name the following:
1. A crystalline allotrope of carbon built up from a hexagonal unit.
2. An allotrope of carbon used for the manufacture of coke.
3. An amorphous allotrope of carbon which floats on water.
4. An acid formed when carbon dioxide is dissolved in water under pressure.
5. The gaseous product obtained when carbon monoxide is passed over heated iron (III) oxide.
Answer:
Sorry, i also don't know the answer to this.
what is the meaning of magnification?
i need help please!
Answer:
the action of magnifying something or the process of being magnified
Answer:
1 : the act of magnifying. 2a : the state of being magnified. b : the apparent enlargement of an object by an optical instrument. — called also power
How does the chemical formula for the sulfite ion differ from the chemical formula for the sulfate ion?
O sulfite contains 2 oxygens and sulfate contains 3 oxygens
O sulfite contains 3 oxygens and sulfate contains 2 oxygens
O sulfite contains 3 oxygens and sulfate contains 4 oxygens
O sulfite contains 4 oxygens and sulfate contains 3 oxygens
Answer:
Sulfite contains 3 oxygens and sulfate contains 4 oxygens
Explanation:
If we had 79.3 grams of Xe, would we expect a volume that is
greater than or less than that obtained with neon?
a
Greater than
b Equal
с
Less than
Answer:less than
Explanation:
If we had 79.3 grams of Xe, we would expect a volume that is less than obtained with neon. So, the correct option is (C).
What is Density?Density is defined as the mass per unit volume of a substance. The most commonly used symbol for density is ρ, although the Latin letter d can also be used. Density is defined as mass divided by volume:
[tex]{\displaystyle \rho ={\frac {m}{V}}}[/tex]
where ρ is density,
m is mass, and
V is volume.
The mass contained per unit volume of an object is known as density. where the SI unit of density is kilogram per cubic meter [tex](kg/m^3).[/tex] Density is inversely proportional to volume, so the density of Xenon is [tex]5.894 kg/m^3[/tex] while the density of neon is 0.89994 kg/m³. So, if density is more than volume will be less and vice versa. In this case, density of Xenon is more as compare to neon so, the volume of neon will be more.
Thus, if we had 79.3 grams of Xe, we would expect a volume that is less than obtained with neon. So, the correct option is (C).
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19)
Why are unique atomic spectra produced by different elements?
How many moles of Al would be produced from 20 moles of Al2O3?
2Al2O3
->
4A1 + 302
[tex]\displaystyle 40 \ mol \ Al[/tex]
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[RxN - Balanced] 2Al₂O₃ → 4Al + 3O₂
[Given] 20 mol Al₂O₃
Step 2: Identify Conversions
[RxN] 2 mol Al₂O₃ → 4 mol Al
Step 3: Stoich
[DA] Set up: [tex]\displaystyle 20 \ mol \ Al_2O_3(\frac{4 \ mol \ Al}{2 \ mol \ Al_2O_3})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 40 \ mol \ Al[/tex]Step 4:Check
Follow sig fig rules and round. We are given 1 sig fig.
Since our final answer already has 1 sig fig, there is no need to round.
Which change will cause gravitational force between and a soccer ball to increase?
Answer:
Moving the balls closer together. The distance decreases and force increases.
Which of the following is NOT an atom that hydrogen bonds?
Select one:
a. Oxygen
b. Nitrogen
c. Fluorine
d. Sodium
Answer:
The answer is D sodium
Explanation:
What property allows objects to be subject to gravity?
friction
mass
inertia
acceleration
Answer:
Mass
Explanation:
explain what keeps the electrons confined in the space surrounding the nucleus
Answer:
Electrons are trapped inside the atom because of the attraction forces with positively charged protons that are found in the nucleus.
If you know the atomic number and the mass number of an atom of any element, you can determine the atom's composition.
A:True
B:False
True. i hope its correct, have a good day. stay happy and stay safe
Answer:
A:true
Explanation:
The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules.
The highest pressure ever produced in a laboratory setting was about 2.0 x 10 6 atm. If we have a
1.0 x 10 -5 liter sample of a gas at that pressure, then release the pressure until it is equal to 0.275 atm,
what would the new volume of that gas be?
Answer:
Volume = 72.7272
Explanation:
if only pressure and volume change, then we can do some simple math to find the answer.
2 x 10 ^ 6 times 1 x 10 ^-5 = 20
pressure and volume must equal 20
20 = 0.275 x volume
20 / 0.275 = new volume
I don't remember significant digits but your volume is 72.72727272 just repeated
If we have a 1.0 x 10 -5 liter sample of a gas at that pressure, then release the pressure until it is equal to 0.275 atm, the new volume will be 72.7272
What is Volume?Volume is the space occupied by a three-dimensional object.
By the Boyle's law
[tex]\rm P_1V_2= P_1V_2[/tex]
P1 (initial pressure) = [tex]2.0 \times10^6 atm[/tex]
V1 (initial volume) = [tex]1.0 \times10^-5 L[/tex]
P2 (final pressure) = 0.275 atm
V2 (final volume) = ? (in L)
Putting the values in the equation
[tex]\rm 2.0 \times10^6 atm \times 1.0 \times10^-5 L = 0.275 atm \times V_2\\\\V_2 = \dfrac{20}{0.275} = 72.72 L[/tex]
Thus, the volume is 72.72 L.
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A chemical ____ is a force of attraction between atoms or
ions that share or transfer valence electrons.
A chemical bond is a force of attraction between atoms or ions that share or transfer valence electrons.
Pliss help
A)random change
B)natural selection
C) artificial selection
D)inbreeding
And why
Answer: I believe it is artificial selection (not certain though)
Explanation: modern day dogs have been bread an domesticated to be used by humans in ways we see fit.
Look at the image below:
Mid ocean ridge
Sea Level
Celing Tin
Marine Sediment
Oceanhatsak/bero) 57 kr
pug
NOOP
thospheremantle Plazburite)
0 Ops
FR00130 kn
asthenosphere mantie
peridotite)
What type of plate boundary is shown here?
convergent
divergent
transform
Answer:
divergent is when plates move apart from each other
Answer:
thats also divergent
you sent the same picture twice
Microscope Structure and Function Worksheet
Pdf
Pls match the letters according to the numbers
Pls answer for 25points
Pls do them correctly
How many atoms are in 2.54 mole O?
Answer: 1.505 * 10^24 atoms
========================================================
Work Shown:
1 mole = 6.02 * 10^23 atoms
2.5*(1 mole) = 2.5*(6.02 * 10^23 atoms)
2.5 moles = (2.5*6.02) * 10^23 atoms
2.5 moles = (15.05) * 10^23 atoms
2.5 moles = (1.505 * 10^1) * 10^23 atoms
2.5 moles = 1.505 * (10^1*10^23) atoms
2.5 moles = 1.505 * 10^(1+23) atoms
2.5 moles = 1.505 * 10^24 atoms
This is true for any element. This value is an approximation since there are roughly 6.02 * 10^23 atoms in 1 mole of any element.
28 grams of Al react with 30 Oxygen gas (O2) to produce Al Oxide (Al2O3). How many grams of Al Oxide will be produced
Answer:
58
Explanation:
Due to conservation of energy, the sum of the reactants = the sum of the products. So 28 + 30 = 58g
The planets in the solar system revolve around the Sun because the Sun is
Answer: Anyway, the basic reason why the planets revolve around, or orbit, the Sun, is that the gravity of the Sun keeps them in their orbits. ... If the Sun weren't there, the Earth would travel in a straight line. But the gravity of the Sun alters its course, causing it to travel around the Sun, in a shape very near to a circle
You arrive at English class 45 seconds after leaving math which is 100
meters away. How fast did you travel?
Answer:
4.97097
Explanation:
You traveled 4.97097 mph.
What is Temperature
Choose 1
Answer:
B. A measure of the average kinetic energy of a substance.
Explanation:
Temperature is a measure of the average kinetic energy of the particles in an object.
Brainlist pls!
should we learn chemical kinetic derivation
Answer:
Yes
Explanation:
It is important to learn about in science
Answer : Yes
Explanation:
One reason for the importance of kinetics is that it provides evidence for the mechanisms of chemical processes. Besides being of intrinsic scientific interest, knowledge of reaction mechanisms is of practical use in deciding what is the most effective way of causing a reaction to occur.
Who discovered the nucleus?