chemical equation why calcium oxide is a basic
HELP ASAP!!!
What is the molarity of 930 mL of LiCl solution that contains 139.9 g of LiCI?
A. 3.5 mol/L
B. 150 mol/L
C. 3.3 mol/L
D. 3.5 x 10-3 mol/L
Explanation:
To determine the molarity, we have to find the number of moles in the volume given, and then extrapolate to find the number of moles that would be in 1 L.
Determine the moles in the given volume
moles of LiCl = mass ÷ molar mass
= 139.9 g ÷ 42.39 g/mol
= 3.30 mol
Find the moles in 1 L
Since 930 mL of LiCl = 3.30 mol
then 1000 mL of LiCl = (3.30 mol × 1000 mL/L) ÷ 930 mL
= 3.55 mol/L
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1. matter
2. oxygen
3. water
4. hydrogen
5. compound
hope it helps :)
is CuCl2 polar or nonpolar ?
Which diagram or diagrams represent a compound?
Answer:
x and z cuz compound are group of molecules or atoms
Coniferous forests grow in a wide range of climates, from the coldest polar regions to the warmest tropical regions and everything in between. Circle True or False.
The answer is true, yw.
Coniferous forests grow in a wide range of climates, from the coldest polar regions to the warmest tropical regions and everything in between. This statement is true.
What are conifers ?Conifers are a type of gymnosperm plants bearing cone like structures in which the seeds are located. Don't be fooled by the fact that coniferous woods are widespread around the world. Some of the wildest trees in the world can be found there.
Hyperion, a coastal redwood tree, is the tallest tree in the world, reaching a height of 379 feet, equivalent to a 35-story structure. From Siberia to Canada, coniferous rainforest biomes can be found. They have cold winters and warm to hot summers.
Temperatures in coniferous forests are quite low all year long. Summertime temperatures range from -7°C to 21°C, while the average wintertime temperature ranges from -54°C to -1°C. Hence, the statement is true.
Find more on conifers:
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• An atom of _________ has an atomic mass of ______ because it has ______ protons and _____ neutrons ?
Answer:
carbon 12 6 6
Explanation:
what is the maximum wavelength of photon that will eject a ground state electron from a hydrogen atom?
Answer:
9.13 x 10^-8 m
Explanation:
The maximum wavelength of photon that will eject a ground state electron from a hydrogen atom is 9.18 * 10^-8.
What is wavelength?
Wavelength is defined as the distance between identical points in the adjacent cycle of a waveform signal propagated in space or along the wires.
Wavelength is calculated as wave speed and frequency.
Wavelength = speed/frequency
SI unit of wavelength is meter.
A ground state atom is an atom in which total energy of the electron can not be lowered by transferring one or more electrons to different orbitals.
Thus, the maximum wavelength of photon that will eject a ground state electron from a hydrogen atom is 9.18 * 10^-8.
To learn more about wavelength, refer to the link below:
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Displacement
A. Must be in a particular direction
B. Is the change in position of an object
C. Must be in a straight line
D. All of the above
Answer:
Option D
Explanation:
Displacement is a vector quantity.
Someone pls help me I will mark you as brain
Answer:
1st one is the answer water cannot be purified by nature pls add me in brainliest
The atomic number tells you the number of_______ in one atom of an element. It also tells you the number of_________ in a neutral atom of that element. The atomic number gives the indentity of an element as well as its location on the Periodic Table. No two different element will havr the________ atomic number
Explanation:
script ok script ok ok ok
which two of the four quantum numbers determine the energy level of an orbital in a multielectron atom?
Answer:
Therefore both Principal quantum number (n) and angular momentum quantum number (1) are responsible to energy level of an orbital in a multi electron atom.
Explanation:
Hope this helps.
Are cations nonmetals
and anions are metals?
Answer:
First, each element that forms cations is a metal, except for one (hydrogen), while each element that forms anions is a nonmetal. This is actually one of the chemical properties of metals and nonmetals: metals tend to form cations, while nonmetals tend to form anions. Are positive ions metals or nonmetals?
Explanation:
Which of the following is NOT a way that water moves from the land to the atmosphere?
what does temperature measure
Answer:
Average kinetic energy that's the answer
Answer:
hotness or coldness
.....................
when you receive fluid in the hospital, it is often 0.9% saline solution. what would happen if the nurse used distilled water instead?
Answer:
The distilled water solution would be hypotonic to your blood cells, so they would gain water, swell, and possibly burst.
. The best way to separate sodium chloride solution and sand is by:
Answer:
Dissolving the mixture in water, filtering and then perform evaporation on the filtrate
Which element has the greatest first ionization energy?
B
C
Be
Li
Which statement is true about the ionic size of the elements in a group as one moves from bottom to top in that group?
Ionic size decreases from bottom to top within the group.
Ionic size increases from bottom to top within the group.
Ionic size does not vary in any predictable way within the group.
Ionic size stays the same within the group.
Answer:
helium
Explanation:
The first ionization energy varies in a predictable way across the periodic table. 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: 2nd answer " C "
Explanation:
First ionization energy is a periodic trend that increases up and to the right on the periodic table. After looking at the position of these elements on the periodic table, carbon is clearly the best answer-choice (B) aka " C "
what are some chemical properties of lead besides it’s melting and boiling points
Answer:
Atomic mass. 207.2 g.mol -1. Electronegativity according to Pauling. 1.8. Density. 11.34 g.cm-3 at 20°C. Melting point. 327 °C. Boiling point. 1755 °C.
Explanation:
i think
Fe-C-Cr alloy is covalent or ionic?
Answer:
covalent....................
HELP PLZZZZZZZ ASAP
Which best describe the kinetic energy of the particles in solids, liquids, and gases? Check all that apply.
Particles in solids have low kinetic energy.
Particles in solids have high kinetic energy.
Particles in liquids have moderate kinetic energy.
Particles in liquids have low kinetic energy.
Particles in gases have high kinetic energy.
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 is change in science??
Answer:
A transition from one accepted theory to another or from one employed method to another.
Explanation:
can evaporated milk be substituted for heavy cream?
Answer:yes
Explanation:
A block of aluminum weighs 50.0g it's density is 2.70 g/cm3 what is the volume of a block
Answer:
18.51g/cm³
Explanation:
Mass=50.0g
Density =2.7g/cm³
Volume =Mass/Density
Volume =50/2.7
Volume =18.51g/cm³
why did rutherford think that all of the alpha particles would go straight through?
The
6.
1. 0,005
5x10 3.
7.
2. 5,050
=
88104
8.
3. 0.0008 =
1 X 103
9.
4. 1,000 =
10
10
5. 1,000,000 =
Answer:
So the asnwer is 66666666666666666666666666666666666666666666666666666666666666666666666666666666666668888844444444444444444443299997832........................................................4563ygfdjuzgu3456655555555555555555555553444446445444444555554
Explanation:
the ion with 36 electrons, 34 protons, and 44 neutrons
Why silicone and germanium are useful in electronic industry????
Answer:
: Each has four valence electrons, but germanium will at a given temperature have more free electrons and a higher conductivity. Silicon is by far the more widely used semiconductor for electronics, partly because it can be used at much higher temperatures than germanium
Explanation:
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ch3cooh + naoh ?????????????
Answer:
CH3COOH+NAOH=.>CH3COONA+H20
Explanation: