Which term describes a change in position?
O A. Force
O B. Acceleration
O C. Motion
O D. Newton

Answer:

See below!

Explanation:

Chlorine is very electronegative, meaning that it will pull electrons, or negativity toward itself.  When it pulls the negativity towards itself, the chlorine becomes partially negative and the carbon becomes partially positive.  Because of this, the compound is polar.

Answer:

A, B, C

Explanation:

1) The 7Ti(SO₄)₃ number which represent the coefficient is 7.

2) the expression CaCO₃--> CaO + CO₂ is an example of chemical equation

3) the arrow in a chemical reaction be translated to mean a) yields c) react to form.

1) The 7Ti(SO₄)₃, in the compound the coefficient is 7. the coefficient is the number which is place in front of the chemical symbol or the chemical formula.

2) the chemical reaction is given as :

CaCO₃--> CaO + CO₂

this is an example of the chemical equation.

3)  the arrow in a chemical reaction be translated to mean the reactants will combine to form the products. so the coorect option is a) yields and c) react to form.

To learn more about chemical equation here

https://brainly.com/question/28294176

#SPJ4

The value of ∆G for the reaction Mg + 1/2 O₂ = MgO is -557.7 kJ/mol.

To determine ∆G for the reaction, we can use the Gibbs free energy equation;  ∆G = ∆H - T∆S

where; ∆H will be the enthalpy change

T will be the temperature in Kelvin

∆S will bethe entropy change

First, we need to find the values of ∆H and ∆S for the reaction. We can use the enthalpy of formation (∆Hf°) values to calculate ∆H;

∆Hf°(Mg) = 0 kJ/mol

∆Hf°(O₂) = 0 kJ/mol

∆Hf°(MgO) = -601.2 kJ/mol

∆H = ∆Hf°(MgO) - ∆Hf°(Mg) - (1/2)∆Hf°(O₂)

∆H = -601.2 kJ/mol - 0 kJ/mol - (1/2)(0 kJ/mol)

∆H = -601.2 kJ/mol

Next, we need to calculate the entropy change (∆S) for the reaction;

∆S = S°(MgO) - S°(Mg) - (1/2)S°(O₂)

∆S = 26.9 J/mol/K - 32.7 J/mol/K - (1/2)(205.0 J/mol/K)

∆S = -147.2 J/mol/K

Now we can calculate ∆G for the reaction at room temperature (298 K);

∆G = ∆H - T∆S

∆G = -601.2 kJ/mol - (298 K)(-147.2 J/mol/K)

∆G = -601.2 kJ/mol + 43.5 kJ/mol

∆G = -557.7 kJ/mol

Negative sign, indicates that the reaction is spontaneous and will proceed in the forward direction.

To know more about Gibbs free energy here

https://brainly.com/question/20358734

#SPJ4

The names of the covalent compounds are:

a. Selenium dioxide

b. Silicon tetraiodide

c. Diarsenic pentoxide

d. Tetraphosphorus trisulfide

a. The compound SeO2 is named selenium dioxide. It consists of one selenium atom bonded to two oxygen atoms.

b. The compound SiI4 is named silicon tetraiodide. It contains one silicon atom bonded to four iodine atoms.

c. The compound As2O5 is named diarsenic pentoxide. It consists of two arsenic atoms bonded to five oxygen atoms.

d. The compound P4S3 is named tetraphosphorus trisulfide. It consists of four phosphorus atoms bonded to three sulfur atoms.

In summary, the names of the covalent compounds are:

a. Selenium dioxide (SeO2)

b. Silicon tetraiodide (SiI4)

c. Diarsenic pentoxide (As2O5)

d. Tetraphosphorus trisulfide (P4S3)

What are the names of the following covalent compounds?

a. Name the compound SeO2.

b. Name the compound SiI4.

c. Name the compound As2O5.

d. Name the compound P4S3.

Learn more about selenium dioxide here:

https://brainly.com/question/30393080

#SPJ11

Answer:

The answer is b.

Explanation:

Amorphous solids have two characteristic properties. When cleaved or broken, they produce fragments with irregular, often curved surfaces; and they have poorly defined patterns when exposed to x-rays because their components are not arranged in a regular array. An amorphous, translucent solid is called a glass.

Hope this helps list as brainlest

Answer:

Chemical property

Physical property

Chemical change

Physical change

When the enthalpy is positive (H > 0), the reaction is endothermic, that is, it absorbs energy.

When the enthalpy is negative (H< 0), the reaction is exothermic, that is, it releases energy.

Therefore, the correct matches are

Endothermic:

• Positive H Value.

• Absorbs Heat.

• Products have higher energy.

Exothermic:

• Negative H Value.

• Releases Heat.

• Products have lower energy.

Answer:

air, water, sunlight

Explanation:

A limiting factor may be defined as a environmental condition or a resource that can limit the plant growth as well as distribution or the abundance of an organism or its population within the ecosystem. The ability  of any plant species to grow and spread throughout any geographic area is the direct result of the adaption to its biotic  and abiotic components of that region.

Some of the factor that affect the plant growth are : sunlight, air, proper temperature, moisture, nutrients, wind,etc.

The lack of the any one of the above essential component will determine the health of the  plant.

The value of the appropriate test statistic is 2.11. The p-value of this outcome is 0.04. At a 1% significance level, we reject the null hypothesis.

# Pre-pandemic period

mean = 590.83

std = 36.17

# Pandemic period

mean = 642.20

std = 25.03

# Pooled variance

variance = (6 × 36.17² + 5 × 25.03²) / (6 + 5) = 328.08

# Standard error

std_err = √(variance / (6 + 5)) = 18.12

# Test statistic

t = (mean_pre - mean_pandemic) / std_err = 2.11

# p-value

p = 1 - t.cdf(2.11, df=10) = 0.04

The p-value is the probability of obtaining a test statistic at least as extreme as the one observed, assuming that the null hypothesis is true. In this case, the p-value is 0.04, which is less than the significance level of 1%. This means that we can reject the null hypothesis with 99% confidence and conclude that the average CO₂ levels in the pre-pandemic and pandemic periods are not equal.

Find out more on COVID-19 pandemic here: https://brainly.com/question/29643338

#SPJ1

Answer:

Chemical Reaction:In the given reaction potassium metal is placed in water and when a reactive metal is placed in water, it reacts with water to form metal hydroxide and hydrogen gas, as a result, potassium hydroxide and hydrogen gas are produced in the reaction. A redox reaction is a reaction in which a substance is oxidized during the reaction whereas some other substance is reduced during the reaction, simultaneously.

Explanation:

correct me nlng kung mali.

Answer:

118750 ml

Explanation:

The chemical equation for complete combustion of hexane is given as;

2C6H14 + 19O2 → 12CO2 + 14H2O  

From the equation of the reaction;

2 mol of C6H14 reacts with 19 mol of O2

2 ml of C6H14 reacts with 19 ml of O2

2500 mL of C6H14 would react with x ml of O2

2 = 19

2500 = x

x = 2500 * 19 / 2 = 23750 ml

Since oxygen is 20% of air;

23750 = 20 / 100 * (Volume of air)

Volume of air = 23750 * 100 / 20 = 118750 ml

Answer:

c

Explanation:

I just learned all this in chemistry too lol

got 100 on the test last week so its good

Experiments with gold foil indicated that atoms contain a positively charged, dense center and the correct option is option C.

Experiments with gold foil, known as the Rutherford gold foil experiment, were conducted by Ernest Rutherford in 1911. In this experiment, he bombarded a thin gold foil with alpha particles.

Most of the alpha particles passed through the foil with little deflection, but some of them were deflected at large angles, and a small fraction even bounced back. This observation led Rutherford to conclude that the atom contains a positively charged, dense center called the nucleus, where most of its mass is concentrated. He proposed the nuclear model of the atom, which became a significant advancement in the understanding of atomic structure.

Thus, the ideal selection is option C.

Learn more about Gold foil experiment, here:

https://brainly.com/question/33537458

#SPJ6

Answer:

d = 0.2 g/cm³

General Formulas and Concepts:

Density = mass / volume

Explanation:

Step 1: Define

m = 100 g

V = 500 cm³

d = ?

Step 2: Find density

Answer:

pH = 4.27. Porcentaje de disociación: 0.03%

Explanation:

El pH de un ácido débil, HX, se obtiene haciendo uso de su equilibrio:

HX(aq) ⇄ H⁺(aq) + X⁻(aq)

Donde la constante de equilibrio, Ka, es

Ka = 1.65x10⁻⁸ = [H⁺] [X⁻] / [HX]

Como los iones H⁺ y X⁻ vienen del mismo equilibrio podemos decir:

[H⁺] = [X⁻]

[HX] es:

20g * (1mol/55g) = 0.3636moles / 2.100L = 0.1732M

Reemplazando es Ka:

1.65x10⁻⁸ = [H⁺] [H⁺] / [0.1732M]

2.858x10⁻⁹ = [H⁺]²

5.35x10⁻⁵M = [H⁺]

pH = -log[H⁺]

El porcentaje de disociacion es [X⁻] / [HX] inicial * 100

Reemplazando

5.35x10⁻⁵M / 0.1732M * 100

1. The new volume of 500 mL of gas is approximately 385 mL.

2. The new pressure is 345.45 torr.

The relationship between pressure, volume, and temperature of a gas is described by Boyle's law, which states that the volume of a gas is inversely proportional to its pressure, provided that the temperature remains constant. To find the new volume, we need to use the equation:

V1 * P1 = V2 * P2

Where V1 is the initial volume, P1 is the initial pressure, V2 is the final volume, and P2 is the final pressure. Substituting the given values, we get:

V2 = V1 * (P1 / P2) = 500 mL * (750 torr / 980 torr)

So, the new volume of 500 mL of gas is approximately 385 mL.

The relationship between pressure, volume, and temperature for a fixed number of gas particles can be described by the ideal gas law: PV = nRT, where P is the pressure, V is the volume, n is the number of particles, R is the gas constant, and T is the temperature (in Kelvin). In this problem, we are given the initial pressure, volume, and temperature, and asked to calculate the final pressure after the volume expands.

2. Since the number of particles (n) and temperature (T) are constant, we can rearrange the equation to find the final pressure after the volume expands:

P1V1 = P2V2

P2 = P1 * (V1/V2)

Plugging in the given values:

P2 = 500 torr * (650 mL / 900 mL) = 345.45 torr

So the new pressure of the helium is 345.45 torr.

For more such questions on gas laws:

https://brainly.com/question/27009857#

#SPJ11

Answer:

0.749351061980325 moles (Exact)

0.75 moles (Rounded to the nearest hundredth)

Hope this Helps!

(Sorry if the answer is confusing)

Answer:

-867.7

Explanation:

Answer:

???????

Explanation:

Answer: 2510

Explanation: Hope this Helps

Answer:

C. Density

all the others are chemical properties

Answer:

C: Density

Explanation:

The change in enthalpy of the reaction is - 2225.97 kJ

To calculate ΔH of the reaction, C3H8(g) + 5O2(g) à 3CO2(g) + 4H2O(l)

Arrange the given reaction steps in such a way that the Reactants and the Products are on the exact same side as in the main reaction.

The first step has C3H8 on the product side, so reverse the entire reaction

C3H8(g) à 3C(s) + 4H2(g)

When the reaction is reversed so should the sign of ΔH.

So the new ΔH1 = + 103.85 kJ

The second and the third steps have Reactants and products aligned exactly the way it is in the main reaction, so no changes in the ΔH values are required for those.

The summation of the steps would be

C3H8(g) + 3C(s) + 3O2(g) + 4H2(g) + 2O2(g) à 3C(s) + 4H2(g) + 3CO2(g) + 4H2O(l)

The reactants and products which are underlined will get canceled from both sides.

Hence, the net reaction is weith enthalpy

C3H8(g) + 5O2(g) à 3CO2(g) + 4H2O(l)

Mathematically,

ΔHreaction = ΔH1 + ΔH2 + ΔH3

                  = + 103.85 kJ + (–1186.5 kJ) + (–1143.32 kJ)

            = - 2225.97 kJ

To know more about enthalpy, Click on

https://brainly.com/question/16720480

#SPJ1

Answer:

Plasma

Explanation:

Estimated to be 99.999% of the visible universe, cosmic plasma may be considered to be the first state of matter, that preceded the other states of matter in the history of the evolution of the Universe.

Answer:

236 g/mol

Explanation:

This question is asking to calculate the molar mass/formula mass of calcium nitrate tetrahydrate with the chemical formula: Ca(NO3)2 · 4H20. This is done as follows:

Atomic mass of the constituent elements are as follows:

Ca = 40

N = 14

O = 16

H = 1

Hence, in Ca(NO3)2 · 4H20.

= 40 + {14 + 16(3)}2 + 4 {1(2) + 16}

= 40 + {14 + 48}2 + 4{2 + 16}

= 40 + {62}2 + 4{18}

= 40 + 124 + 72

= 236

Hence, the molar mass of Ca(NO3)2 · 4H20 is 236g/mol.

Answer:

236 g/mol

Explanation:

Answer:

A

Explanation:

The answer to this question is A. Both ripening and spoiling are chemical reactions.

Spoiling is a chemical reaction because spoiled food has bad smell and taste and it changes colour too.

Ripening of fruits is a chemical change. For example the colour could change as well as the texture.

Answer:

option a) chemical reaction, chemical reaction.

Explanation:

Changes in which new substances with different properties are formed are called chemical changes. Cooking of food, burning of substances are chemical changes as entirely new substances are formed. Burning of a candle wax releases carbon dioxide and water vapour (new substances). in here ripening and spoiling is a change that cannot be reversed which makes it a chemical change.

Nitric acid is a strong acid while the nitrate ion is a very weak base. Nitric acid is able to consume hydroxide ions. However, the nitrate ions present are unable to consume hydronium ions. As a result, the set of compounds does not form a buffer solution.

A mole is the number of entities present in a substance, such as atoms, molecules, or ions. A mole of any substance is defined as 6.0221023 molecules. Just as we use a standard value to quantify diverse things, such as 1 dozen = 12 items, we utilise the mole to quantitatively calculate the size of the tiniest creatures.

The number of atoms in 12g (0.012 kg) of 12C isotope is equal to the number of particles in 1 mole of the substance. One of the most crucial facts to remember is that the mole of a material always includes the same number of entities regardless of the substance.

Learn more about Molar Mass refer:

https://brainly.com/question/21334167

#SPJ4

Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

Bimolecular nucleophilic substitution (SN2) reactions are concerted reactions in which both the nucleophile and the substrate are involved in the rate-limiting step. Bonds are broken and new bonds are formed in a single step thanks to the coordinated nature of this reaction. In order to comprehend this reaction, it is essential to examine the transition state, which replicates the concerted rate-limiting step.

What is Hammond postulate?

The geometrical structure of the transition state of an organic chemical reaction is described by Hammond's postulate (also known as the Hammond-Leffler postulate), a physical organic chemistry hypothesis.

According to the postulate, which George Hammond first put forth in 1955, if two states, such as a transition state and an unstable intermediate, happen concurrently during a reaction process and have nearly the same amount of energy, their interconversion will only cause a slight reorganization of molecular structures.

Bimolecular nucleophilic substitution (SN2) reactions are concerted reactions in which the rate-limiting step involves both the nucleophile and the substrate. Due to the concerted nature of the reaction, the bonds are broken and new bonds are formed all in one step. It is crucial to examine the transition state, which resembles the concerted rate-limiting step, in order to interpret this reaction. The halide (L) bond is broken while the nucleophile forms a new bond with the carbon in the "Depiction of SN2 Reaction" figure.

To learn more about charge to be distributed, click on the below link:

https://brainly.com/question/14799724

#SPJ4