Answer:
B. particles in an object move faster
Explanation:
At higher temperatures, particles in an object moves faster.
Temperature is the degree of hotness or coldness of a body.
At higher temperature, the substance is very hot. Temperature is related to the heat energy content of a bodyAs the temperature increases, the average kinetic energy of the particles of system increases more and more. This is in compliance with the kinetic molecular theory of matter. Therefore, at higher temperatures, particles in an object move faster.1. The molecular mass of hydrochloric acid (HCI) is 36.5 g/mol. How many moles of HCl are in 120g of HCI?
Answer:
3.3 mol HCl
General Formulas and Concepts:
Chemistry - Atomic Structure
Using Dimensional AnalysisExplanation:
Step 1: Define
120 g HCl
Step 2: Identify Conversions
Molar Mass of HCl - 36.5 g/mol
Step 3: Convert
[tex]120 \ g \ HCl(\frac{1 \ mol \ HCl}{36.5 \ g \ HCl} )[/tex] = 3.28767 mol HCl
Step 4: Check
We are given 2 sig figs as our lowest. Follow sig fig rules and round.
3.28767 mol HCl ≈ 3.3 mol HCl
Among the groups of elements listed below, which have the same number of electrons in their outermost energy levels? C, K, Ca, Rb, Sr
Na,Mg,AI,S
Li,B,C,F
F,CI,Br,I
Answer:
i believe its d
Explanation:
Answer:
I checked and I too think its D
Weathering, erosion, and deposition act together in a cycle that wears down
and builds up Earth's surface. true or false???
Answer:
The answer is true. Hope this helps
Which of these elements is the most chemically reactive?
A.
strontium (Sr)
B.
beryllium (Be)
C.
radium (Ra)
D.
calcium (Ca)
The most chemically reactive element among the listed elements is Radium (Ra). The correct option is C. radium (Ra)
The elements listed are alkaline earth metals, that is, they belong to group 2 of the period table.
The reactivity of alkaline earth metals increases down the group. That is, the reactivity increases with increase in atomic mass.
Among the listed element, radium (Ra) has the greatest atomic mass and it is the last element as we go down the group.
Hence, the most chemically reactive element among the listed elements is Radium (Ra). The correct option is C. radium (Ra)
Learn more here: https://brainly.com/question/3288105
The process in which the nuclei of two atoms combine to form a heavier atom, releasing a large amount of energy is known as -
Answer: Nuclear fusion
Explanation:Nuclear fusion is the process by which two or more atomic nuclei join together to form a single heavier nucleus and large amounts of energy.
Why are metals good conductors of heat?
O A. The free-moving electrons transmit heat quickly.
B. The malleable atoms slide past each other, transmitting heat.
O c. The formation of alloys allows a path for heat to travel.
O D. The ductility allows heat to move along an edge quickly.
Answer: A. The free-moving electrons transmit heat quickly.
Explanation:
Answer:
the free-moving electrons transmit heat quickly.
Explanation:
i just took the test
any help would be much appreciated, i'm being timed :( i'll mark brainliest and 5 star
Answer:
3 times ....
group 2
Explanation:
Which of the following is the smallest subatomic particle in an atom?
A: Neutron
B: Proton
C: Electron
D: Compound
Answer:electron
Explanation:
Which most accurately describes the universe as we currently describe it?
Answer: The universe consists of all physical objects on earth in space
Explanation:
How many electrons would be in a calcium cation with a positive 2 charge?
Number of electrons in a Ca²⁺ = 18
Further explanationIn an atom there are levels of energy in the shell and sub shell
This energy level is expressed in the form of electron configurations.
Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub-shells in the shell of an atom, namely s, p, d and f. The maximum number of electrons for each sub shell is
• s: 2 electrons
• p: 6 electrons
• d: 10 electrons and
• f: 14 electrons
Charging electrons in the sub shell uses the following sequence:
1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.
The element Ca has an atomic number of 20, so the number of electrons and protons (in neutral atoms) is also 20
Electron configuration of Ca : 1s², 2s², 2p⁶, 3s², 3p⁶, 4s² ⇒[Ar] 4s²
When Ca releases 2 electrons to gain stability (forming Ca²⁺ cations), the number of electrons becomes:
[tex]\tt 20-2 = 18[/tex]
and the electron configuration (Ca²⁺ ) becomes:
1s², 2s², 2p⁶, 3s², 3p⁶
ANSWER ASAP!
How does a combustion reaction form?
whats the diffrence beetween fluids and nonfluids
Answer:
One is a fluid and one is not.
Explanation:
Fluid is a common state of certain substances, or a type of matter. Liquid is one of the three phases or state of matter. Fluids flow and has some viscosity (thickness). Liquids also flows and it has volume, but no definite shape. A non fluid is a substance that is not a liquid.
Answer:
one is limited and one isn't
Which statement describes longwave radiation? Choose the correct answer.
O It does not affect Earth's energy budget.
O It is solar energy that falls on Earth's features.
O It makes up about 30% of the energy emitted by Earth.
O It is infrared radiation emitted after being absorbed by Earth's features.
Answer: D
Explanation: Heat resulting from the absorption of incoming shortwave radiation is emitted as longwave radiation
Una muestra de 2,36 gramos de NaHCO3 se descompuso completamente en un experimento. 2NaHCO3 → Na2CO3 + H2CO3 En este experimento, el dióxido de carbono y los vapores de agua se combinan para formar H2CO3. Después de la descomposición, el Na2CO3 tenía una masa de 1,57 gramos. Determine la masa del H2CO3 producido. Calcule el porcentaje de rendimiento de H2CO3 para la reacción.
Answer:
105%
Explanation:
El porcentaje de rendimiento se define como la masa obtenida del producto (En este caso, en términos de H2CO3), dividida en la masa teórica que debe ser producida.
La masa real se obtiene con las moles del otro producto que fueron producidas (Que son las mismas moles producidas de H2CO3)
Y la masa teórica se obtiene a partir de las moles de reactivo adicionadas:
Masa teórica:
2.36g NaHCO3 * (1mol / 84g) = 0.0281 moles de NaHCO3
0.0281 moles de NaHCO3 * (1mol H2CO3 / 2 moles NaHCO3) =
0.014 moles de H2CO3 son producidas. La masa es:
0.014 moles de H2CO3 * (62g / mol) = 0.871g es la masa teórica
Masa real:
1.57g Na2CO3 * (1mol / 106g) = 0.014 moles de Na2CO3
0.0148 moles de Na2CO3 * (1mol H2CO3 / 1 moles Na2CO3) =
0.0148 moles de H2CO3 son producidas. La masa es:
0.0148 moles de H2CO3 * (62g / mol) = 0.918g es la masa real producida
Así, el porcentaje de rendimiento es:
0.918g / 0.871g * 100 =
105%
The mode of 12, 17, 16, 14, 13, 16, 11, 14,13, 16 is
Answer:
Mean = 14.2Median = 14Mode = 16Range = 6Explanation:
__________________________________________________________
Mean = 14.2 or 14
Median = 14
Mode = 16
Range = 6
__________________________________________________________
Here are all the numbers from least to greatest order: 11, 12, 13, 13, 14, 14, 16, 16, 16, 17.
__________________________________________________________
Hope this helps! <3
__________________________________________________________
which of the following elements has the lowest ionization energy?
a. Argon
b. Hydrogen
c. Beryllium
d. Hellium
Among the given options, the element that has the lowest ionization energy is beryllium. Thus, the correct option for this question is C.
What do you mean by Ionization energy?Ionization energy may be defined as the amount of energy that is significantly required in order to eliminate an electron from an isolated atom or molecule. It is the minimum energy required to remove the most loosely bound electron of an isolated gaseous atom, positive ion, or molecule.
The group of elements that have the lowest ionization energy is known as alkali metals or alkali earth metals. This is because of the shielding effect that the ionization energy decreases from top to bottom within a group. Beryllium is a member of group 2 which has the lowest ionization energy. While Fluorine is said to have the highest ionization energy.
Therefore, the element that has the lowest ionization energy is beryllium. Thus, the correct option for this question is C.
To learn more about Ionization energy, refer to the link:
https://brainly.com/question/20658080
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5. An anion of carbon C-4 has how many electrons?
a. 6
b. 8
C. 9
d. 10
Answer:
A.6
Explanation:
An atom of carbon can share four electrons. Carbon has a total of six electrons, with two in the first orbital and four in the second orbital.
A block of material has a volume of 50 cubic centimeters, and a mass of 1,000 grams; what is that object's density?
O Why are you asking me this question??
0 .02 cc/g
O None of these answers N
O All of these answers
20 g/cc
050,000 g/cc
O 5 g/ccccc
Answer:
Density = [tex]20\ g/cm^3[/tex]
Explanation:
Given that,
Mass of the object, m = 1000 g
Volume of the block, V = 50 cm³
We need to find the density of the object. Density is equal to mass per unit volume.
d = m/V
[tex]d=\dfrac{1000\ g}{50\ cm^3}\\\\=20\ g/cm^3[/tex]
So, the density of the object is [tex]20\ g/cm^3[/tex].
When collecting H2 gas from the reaction of Mg with HCl, it is desirable to have desirable to have which of the following scenarios?
Answer:
Explanation:
Excess hci
What is the balanced equation for KOH+CO2—>K2CO3+H2O
The balanced equation :
2KOH+CO₂⇒K₂CO₃+H₂O
Further explanationEqualization of chemical reaction equations can be done using variables. Steps in equalizing the reaction equation:
1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c etc.
2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index between reactant and product
3. Select the coefficient of the substance with the most complex chemical formula equal to 1
Reaction
KOH+CO₂⇒K₂CO₃+H₂O
give coeffiecientaKOH+bCO₂⇒K₂CO₃+cH₂O
make equationK, left=a, right=2⇒a=2
H, left=a, right=2c⇒a=2c⇒2=2c⇒c=1
O, left=a+2b, right=3+c⇒a+2b=3+c⇒2+2b=3+1⇒2b=2⇒b=1
the equation becomes :
2KOH+CO₂⇒K₂CO₃+H₂O
1/2 divided by 20km
please answer
Answer:
10 is the answer for the question
What is this plzzzzz helppp tyvmmmm
this graphs represents
plz help me out guys
Answer:
Switch is the 2 circles
battery is the 2 lines
bulb is the x-men sign
Explanation:
Answer:
hope it helped you
have a nice day
what is the chemical formula for lithium chloride
Answer:
LiClExplanation:
chemical formula for lithium chloride is LiClhope it helps
plzz mark as brainliest..
Hydrofluoric acid is what type of acid?
Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water. Solutions of HF are colourless, acidic and highly corrosive. It is used to make most fluorine-containing compounds; examples include the commonly used pharmaceutical antidepressant medication fluoxetine (Prozac) and the material PTFE (Teflon).
Se sabe que un compuesto contiene 33.002% de carbono,9.063% de hidrogeno y el resto de oxigeno. El espectrometro de masas indica que la masa molecular aproximada es de 191g/mol(cual es la formula empirica y molecular probable
Answer:
CH3O
C6H18O6
Explanation:
Porcentaje de masa de oxígeno = 100% - (33,002% + 9,063%) = 57,935%
Divida el porcentaje en masa de cada elemento por su masa atómica relativa;
H- 9.063 / 1, C- 33.002 / 12, O - 57.935 / 16
H- 9.063, C- 2.75, O- 3.62
Dividir por la proporción más baja;
H-9.063 / 2.75, C- 2.75 / 2.75, O- 3.62 / 2.75
H- 3, C-1, O- 1
Fórmula emperical = CH3O
Dado que la masa molecular es 191 g / mol
Sea n el número de cada átomo de la molécula
Por tanto, su fórmula molecular es; (CH3O) n = 191
[12 + 3 (1) + 16] n = 191
31n = 191
n = 191/31
n = 6
Por lo tanto, la fórmula molecular del compuesto es; (CH3O) 6 que es C6H18O6
Ples help is it Fission, Fusion, or Both 1. Incredibly high amounts of energy are released. ____ 2. Results in a nuclear change. ______ 3. The end product is heavier. _____ 4. Two nuclei become one. ____ 5. The end product is lighter. ____
Answer:
1. fission
2. both
3. fusion
4. fusion
5. fission
Explanation:
Fission refers to the splitting of a single nucleus into two or more small nuclei while fusion refers to the combination of two or more small nuclei into one heavy nucleus.
When a single heavy nucleus splits, energy is released and the end products are 2 or more lighter nuclei. On the other hand, when several light nuclei fuse into one nucleus, energy is absorbed and the end product is one heavy nucleus. Both fission and fusion result in a nuclear change.
Snow is a form of
E: evaporation
F. precipitation
G. condensation
H. transpiration
Which would balance the equation? (Look at picture on my laptop)
-3
-4
-1
-2
The answer is 2
2H2 + O2 ---> 2H2O