8. At higher temperatures _______.
A. particles in an object have less energy
B. particles in an object move faster
C. a gas contracts
D. particles vibrate slowly

Answers

Answer 1

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.

Related Questions

What is the balanced equation for KOH+CO2—>K2CO3+H2O

Answers

The balanced equation :

2KOH+CO₂⇒K₂CO₃+H₂O

Further explanation

Equalization 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 coeffiecient

aKOH+bCO₂⇒K₂CO₃+cH₂O

make equation

K, 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

What is this plzzzzz helppp tyvmmmm

Answers

looks like a Christmas tree ☺️

Weathering, erosion, and deposition act together in a cycle that wears down
and builds up Earth's surface. true or false???

Answers

Answer:

The answer is true. Hope this helps

The answer is true
Hope this helped

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​

Answers

Answer:

i believe its d

Explanation:

Answer:

I checked and I too think its D

1. The molecular mass of hydrochloric acid (HCI) is 36.5 g/mol. How many moles of HCl are in 120g of HCI? ​

Answers

Answer:

3.3 mol HCl

General Formulas and Concepts:

Chemistry - Atomic Structure

Using Dimensional Analysis

Explanation:

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

Which of the following is the smallest subatomic particle in an atom?

A: Neutron

B: Proton

C: Electron

D: Compound

Answers

Answer:electron

Explanation:

1/2 divided by 20km
please answer

Answers

Answer:

10 is the answer for the question

2.5 × 10-5 m-1 I hope that this helps

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.

Answers

Answer: D

Explanation: Heat resulting from the absorption of incoming shortwave radiation is emitted as longwave radiation

any help would be much appreciated, i'm being timed :( i'll mark brainliest and 5 star

Answers

Answer:

3 times ....

group 2

Explanation:

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

Answers

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

Which would balance the equation? (Look at picture on my laptop)

-3
-4
-1
-2

Answers

The answer is 2

2H2 + O2 ---> 2H2O

Answer: 2

Balanced chemical equation:

2 H2 + O2 -> 2H2O

Left side:

4 H’s (2 x 2)
2 O’s (1 x 2)

Right side:

4 H’s (2 x 2)
2 O’s (2 x 1)

Therefore, left side equals to the right side.

The mode of 12, 17, 16, 14, 13, 16, 11, 14,13, 16 is​

Answers

Answer:

Mean = 14.2Median = 14Mode = 16Range = 6

Explanation:

__________________________________________________________

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

__________________________________________________________

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.

Answers

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 process in which the nuclei of two atoms combine to form a heavier atom, releasing a large amount of energy is known as -​

Answers

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.

Which most accurately describes the universe as we currently describe it?

Answers

Answer: The universe consists of all physical objects on earth in space

Explanation:

which of the following elements has the lowest ionization energy?
a. Argon
b. Hydrogen
c. Beryllium
d. Hellium

Answers

The answer is C because group two (Alkaline earth metals) have the lowest energy.

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

#SPJ2

ANSWER ASAP!
How does a combustion reaction form?

Answers

A combustion reaction is when a fuel, usually a hydrocarbon, reacts with excess oxygen to form carbon dioxide gas and water vapor.
A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. Combustion reactions must involve O2 as one reactant. The combustion of hydrogen gas produces water vapor.

How many electrons would be in a calcium cation with a positive 2 charge?

Answers

Number of electrons in a Ca²⁺ = 18

Further explanation  

In 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

5. An anion of carbon C-4 has how many electrons?
a. 6
b. 8
C. 9
d. 10

Answers

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.

Snow is a form of
E: evaporation
F. precipitation
G. condensation
H. transpiration

Answers

The answer is H. transpiration

Which of these elements is the most chemically reactive?

A.
strontium (Sr)

B.
beryllium (Be)

C.
radium (Ra)

D.
calcium (Ca)

Answers

I think it’s D because They are not strongly held by the nucleus, hence are readily released. And readily released electrons means higher reactivity. Easy on the alkaline earth metals.

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

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​

Answers

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].

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. ____

Answers

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.

this graphs represents

Answers

Pls help me. Show proof on why it’s that answer.

When collecting H2 gas from the reaction of Mg with HCl, it is desirable to have desirable to have which of the following scenarios?

Answers

Answer:

Explanation:

Excess hci

plz help me out guys

Answers

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

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.

Answers

Answer: A. The free-moving electrons transmit heat quickly.

Explanation:

Answer:

the free-moving electrons transmit heat quickly.

Explanation:

i just took the test

Hydrofluoric acid is what type of acid?

Answers

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).

whats the diffrence beetween fluids and nonfluids

Answers

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

what is the chemical formula for lithium chloride

Answers

Answer:

LiCl

Explanation:

chemical formula for lithium chloride is LiCl

hope it helps

plzz mark as brainliest..

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