Answer:
H2SO4 + CaCO3 → CaSO4 + H2O + CO2 - Balanced equation | Chemical Equations online!
Na2co3 HCL nacl h2o co2
This is an acid-base reaction (neutralization): Na 2CO 3 is a base, HCl is an acid. This is a gas evolution reaction, CO 2 is the formed gas.
2
Convert -27°C to Kelvin.
Answer:
-27 C converted to Kelvin is 246.15 Kelvin.
Explanation:
Hope this helps
Answer:
246.15K
Explanation:
Formula: (-27°)C + 273.15 = 246.15K
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from =3 to =1.
Answer:
[tex]1.936\times 10^{-18}\ \text{J}[/tex]
Explanation:
[tex]R_h[/tex] = Rydberg constant = [tex]2.178\times 10^{-18}\ \text{J}[/tex]
[tex]n_i[/tex] = Initial shell = 3
[tex]n_f[/tex] = Final shell = 1
We have the relation
[tex]\Delta E=R_h(\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2})\\\Rightarrow \Delta E=2.178\times 10^{-18}(\dfrac{1}{1^2}-\dfrac{1}{3^2})\\\Rightarrow \Delta E=1.936\times 10^{-18}\ \text{J}[/tex]
The energy of the photon emitted here is [tex]1.936\times 10^{-18}\ \text{J}[/tex].
What is the most likely effect of an increase in precipitation?
Lakes dry up. Shortage of water. Decrease in humidity.
Place the
elements in order from low number of valence electrons to high number of valence electrons.
1
Neon
2
Aluminum
3
Silicon
4.
Potassium
5
Magnesium
1 point
If the element Lithium (Li) were to bond with the element Sulfur (s), what
type of bond can you predict will be formed and why?*
A. Covalent-Li and S are two nonmetals
B. Covalent-Li is a metal and S is a nonmetal
C. Ionic-Li and S are two nonmetals
D. Ionic-Li is a metal and S is a nonmetal
Answer:
C. Ionic-Li and S are two nonmetals
How many atoms of nitrogen appear to be on the reactant side?
1. Which of the statements is correct?
A. Only asteroids collide with Earth.
B. Cornets are ball of ice, dust, and metal.
C. Meteoroids are streak of light produced when comet enters Earth's
atmosphere.
D. Only asteroids can be found in the solar system.
2. What do you call the fragments or debris that resulted from the collision of
asteroids or comets?
A. meteors
B. meteoroids
C. Oort Cloud
D. Kuiper Belt
3. What is the bright glow around the "head" of a comet?
A. coma
B. crown
C. halo
D. ring
4. What is the name of the famous comet that can be seen from Earth every 75 to
76 years?
A. Hale Boop
B. Comet Halley
C. Comet Tempel 1
D. Shoemaker Levy-9
5. What is the correct term for a “shooting star"?
A. asteroid
B. comet
C. falling star
D, meteor
6. What is an Asteroid Belt?
A. It has rocks crossing the Sun, Mars, and Jupiter.
B. It has rocks crossing the Sun, Jupiter, and Uranus.
C. It is an area between Mars and Jupiter where most asteroids are found.
D. It has rocks between the Earth and Jupiter where most asteroids are found.
Answer:
down
Explanation:
Answer
(a) F
Pole Star is a star in the galaxy and hence not a part of the solar system.
(b) T
Mercury is the smallest planet in the solar system and Jupiter is the largest planet in the solar system.
(c) T
Uranus is the farthest planet to the sun in the solar system and Mercury is the closest planet to the earth in the solar system.
(d) T
INSAT or Indian National Satellite System is a series of artificial Indian satellites used for telecommunications, meteorology and search and rescue operations.
(e) F
There are eight planets in the solar system. They are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Note the pluto is considered as a dwarf planet.
(f) F
Orion can be seen with naked eyes. It is one of the most magnificent constellations in the sky. It has seven or eight bright stars. Orion is also called the Hunter
In this exercise, we have to use our knowledge of astronomy to identify the correct alternatives, so we find that:
1)C
2)B
3)A
4)B
5)D
6)C
Then, based on astronomy knowledge, we can identify that the true alternatives correspond to:
1)A meteor happen a streak of light above bring into being by a meteor superlative through Earth's general feeling or mood.
2)Meteoroids exist lumps of rock or iron that revolution the brightest star, just as celestial body orbiting a star, asteroids, and comets act.
3)A coma happen the fuzzy-anticipate glow that maybe visualize situated on sides the head of a comet.
4)Halley's Comet, that happen 8 kilometres (5 miles) expansive and 16 km long, travels around the Sun each 75 to 76 age in an lengthened circuit.
5)Shooting stars exist existent what astronomers call meteors. Most meteors upset fashionable the gases around the earth before they reach the ground.
6)The celestial body orbiting a star belt happen a torus-form domain in the Solar System, situated about middle from two points the orbits of the celestial body orbiting a star Jupiter and Mars.
See more about astronomy at brainly.com/question/5165144
a pure substance could be either an element or a compound true or false?
Answer:
True
Explanation:
Both work because an element would be pure and compounds can be split into elements. This will work unless the substance isnt chemcially pure, but in this case it is so the answer would be true.
Hey guys. Sorry for all the questions. But I’m checking my answers for a Science test. Here are my questions.
1. Which type of energy does moving water have?
A. Electrical
B. Wind
C. Kinetic
D. Potential
2. A teacher walks quickly by a student sitting at her desk. Which term describes what the student observed?
A. Speed
B. Motion
C. Position
D. Force
Thank you!!
Answer:
1. c 2. b that's what i think i learned this in middle school i dont completely remember
What is the amount of diamine silver that can be formed when 10.00 g AgCl is mixed with 1.00 L of 0.100 M NH3?
The amount of diamine silver chloride = 8.87 g
Further explanationGiven
10 g AgCl
1.00 L of 0.100 M NH3
Required
the amount of diamine silver
Reaction
AgCl + 2 NH₃ → [Ag(NH₃)₂]Cl
mol AgCl :
= mass : MW
= 10 g : 143,32 g/mol
= 0.0698
mol NH₃ :
= M x V
= 0.1 x 1
= 0.1
NH₃ as a limiting reactant
mol [Ag(NH₃)₂]Cl based on NH₃ :
= 1/2 x mol NH₃
= 1/2 x 0.1
= 0.05
Mass diamine silver :
= 0.05 x 177.3822 g/mol
= 8.87 g
New rocks are heavier than old rocks.
How much heat is released when 24.8 g of ch4 is burned in excess oxygen gas?
The given question is incomplete. The complete question is:
How much heat is produced when 24.8 g of [tex]CH_4[/tex] is burned in excess oxygen gas
Given: [tex]CH _4 +2O_2\rightarrow CO_2+2H_2O[/tex] ΔH= −802 kJ.
Answer: 1243.1 kJ
Explanation:
Heat of combustion is the amount of heat released on complete combustion of 1 mole of substance.
Given :
Amount of heat released on combustion of 1 mole of methane = 802 kJ kJ/mol
According to avogadro's law, 1 mole of every substance occupies 22.4 L at NTP, weighs equal to the molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
1 mole of [tex]CH_4[/tex] weighs = 16 g
Thus we can say:
16 g of [tex]CH_4[/tex] on combustion releases heat = 802 kJ
Thus 24.8 g of [tex]CH_4[/tex] on combustion releases =[tex]\frac{802}{16}\times 24.8=1243.1kJ[/tex]
Thus heat released when 24.8 g of methane is burned in excess oxygen gas is 1243.1 kJ
How is Muscular Strength measured and why is this important to know?
Answer:
Your ability to move and lift objects refers to muscular strength. It's measured by how much force you can exert for a short period of time and how much weight you can lift.
Explanation:
Be able to describe the relationship between Freedom of Movement and phase change.
Ion knoe Wdym by “be able to describ’ so ima put it in my own words idr lol:)
if you talm bout some kentic energy or sum ok but other Dan dat ion knoe tbh
I can explain how transferring kinetic energy in and out of a substance can cause a change
13.Which shows the order of increasing ionization energy?
a.Si, Al, Mg, Na
b.Ga, Ge, As, Se
c.Be, Mg, Ca, Sr
d.F, Cl, Br, I
How many atoms are there in 48 grams of carbon?
Answer:
20
Explanation:
what does kyle learn at the end
Answer:
Umm who's Kyle?
Explanation:
Answer:
his skills aren’t as valuable to the team as he thought
Explanation:
A basketball has a mass of 0.625 kg. Most basketball hoops are at a height of 3 m above the ground. What is the gravitational potential energy of a basketball just before it goes through the hoop?
The gravitational potential energy of a basketball : PE = 18.375 J
Further explanationGiven
height = h = 3 m
mass = 0.625 kg
Required
The potential energy
Solution
The energy produced from its position is called potential energy (PE)
which can be formulated as:
PE = m. g. h (g = 9.8 m/s²)
Input the value :
PE = 0.625 x 9.8 x 3
PE = 18.375 J
PLEASE HELP! 80 points!!
A metal crystallizes in the face‑centered cubic (FCC) lattice. The density of the metal is 12020 kg/m3, and the length of a unit cell edge, , is 389.08 pm. Calculate the mass of one metal atom in grams.
Identify the metal. either ( gold, silver, platinum, palladium)
Answer:
the metal is gold I'd say
The mass of one metal atom is [tex]1.770\times 10^{-22}[/tex]grams.
The metal atom is palladium.
Explanation:
Given:
A face-centered unit cell.
The density of the unit cell is [tex]12020 kg/m^3[/tex].
The edge length of the unit cell 389.08 pm
To find:
The mass of one atom of the metal
Solution:
The density of the unit cell = d = [tex]12020 kg/m^3[/tex]
The edge length of the unit cell = a = 389.08 pm
[tex]1 pm = 10^{-12} m\\a=389.08 pm=389.08\times 10^{-12} m=3.8908\times 10^{-10}m[/tex]
Total number of atoms in F.C.C unit cell = z = 4
The atomic mass of the metal atom = M
The density of the unit cell is given by:
[tex]d=\frac{z\times M}{N_A\times a^3}\\12020 kg/m^3=\frac{4\times M}{6.022\times 10^{23}mol^{-1}\times (3.8908\times 10^{-10}m)^3}\\M=0.106586 kg/mol\\1 kg=1000 g\\M=0.106586 kg/mol=0.106586 \times 1000 g/mol\\M=106.586 g/mol[/tex]
The mass of one mole of metal atom = 106.586 g
The mass of 1 atom of metal :
[tex]=\frac{106.586 g}{6.022\times 10^{23}}\\=1.770\times 10^{-22} g[/tex]
The mass of one metal atom is [tex]1.770\times 10^{-22}[/tex] grams.
The atomic mass of the metal atom is 106.586 g/mol which is close to the atomic mass of the palladium. Hence, the metal atom is palladium.
Learn more about the density of unit cell here:
brainly.com/question/7210717?referrer=searchResults
brainly.com/question/1594030?referrer=searchResults
whats the balance to Sr + O, SrO
Answer:
SrO = Sr + O - Chemical Equation Balancer.
Explanation:
A __________________ chemical equation shows that the same number of atoms in the reactants are also in the product.
balanced
rearranged
transferred
beautiful
This element, in the nitrogen family, has more protons than silver, but less than xenon
Answer:
antimony
Explanation:
it has 51 protons, 4 more than silver and two less than xenon
why do the properties of a material determine the use of the material?
Answer:
Matter is made up of particles whose properties determine the observable characteristics of matter and its reactivity.
Explanation:
What is the percent composition of C4H10? (4 points)
44.6% C and 45.4% H
57.3% C and 42.7% H
82.7% C and 17.3% H
89.4% C and 10.6% H
Answer:82.7% C and 17.3% H
Explanation:
C4 = 12.0107g/mol x 4 = 48.0428 g/mol
H10 = 1.00794 g/mol x 10 = 10.0794 g/mol
Molar Mass of Butane, C4H10 = 48.0428 g/mol + 10.0794 g/mol= 58.1222 g/mol
percent composition of Carbon is = ( mass of carbon contained in butane / molar mass of Butane) x 100
=(48.0428 /58.1222) x 100% = 0.8265 x 100
=82.65% =82.7% of Carbon.
Percent composition of Hydrogen = (mass of Hydrogen contained in Butane / molar mass of Butane )x 100
( 10.0794/58.122 ) x 100% =0.1734 x 100
= 17.3% OF Hydrogen.
Answer:
C- 82.7% C and 17.3% H
Explanation:
I took the Quiz
A certain type of decorative lamp contains colored liquids. These liquids form globs that break off and rise to the top of the liquid. The globs rise due to____.
Answer:
The globs rises due to convection.
Explanation:
Convection is when warmer parts move to the top and the cooler parts move to the bottom. Since the globs are going to be warmer, they rise to the top.
Hope this helps :D
1. What are commonly called as "shooting stars"?
A. asteroids
B. comets
C. meteors
D. meteorites
2. What are found in the circular or somewhat like "doughnut-shaped"
region between Mars and Jupiter?
A. asteroids
B. comets
C. meteors
D. meteorites
3. Which Near-Earth Objects (NEO) are found on the Kuiper Belt and Oort
Cloud?
A. asteroids
B. comets
C. meteors
D. meteorites
4. What are comets made of?
A. dust only
B. metal only
C. dust and metal
D. dust, metal, and ice
5. What do you call the shining "head" around a comet?
A. coma
B. crown
C. halo
D. ring
Answer:
I hope I can help you
I hope I can help you
Heat from the sun moves through space by the process of
es
A)
circulation.
B)
conduction
C)
convection.
D)
radiation
Q.3 Which the following statements about the given reaction are correct:
3Fe(s) + 4H2O(g)- Fe203 (S) + 4H2(g)
i) Iron metal is getting oxidized
ii) Water is getting reduced
iii) Water is acting as reducing agent
iv) Water is acting as oxidizine agent
a) (i), (ii) and (iii) b)(iii) and (iv)
c) (i), (ii) and (iv) d) (ii) and (iv)
Answer:
The statements which are correct are;
c) (i), (ii) and (iv)
Explanation:
The chemical equation is presented as follows;
2Fe(s) + 3H₂O(g) → 3Fe₂O₃(s) + 3H₂(g)
Therefore, we have;
i) The iron gains oxygen atoms and therefore gets oxidized
The iron loses 3 electrons each to become oxidized to Fe³⁺ in Fe₂O₃
ii) The water loses oxygen and therefore it is getting reduced
iv) The water donates oxygen and therefore it is acting as the oxidizing agent
The correct options are (i), (ii) and (iv).
is CdCi2 covalent or ionic
Answer:
binary and 11
Explanation:
CaCl2 or Calcium Chloride is an ionic bond and not a covalent bond. Since there should be sharing of electrons between two atoms to be a covalent bonding. In case of calcium chloride, the calcium gives up an electron to each chlorine atom, becoming Ca2+ ions and chlorine become Cl– ions.
:)
i gave brainlest.... the answer is correct!!!
1.Oort Cloud
2.Uranus Earth and Mars
3.Kuiper Belt
4.Asteroid Belt