Which of the following statements is not a description of Venus?

Closest planet to the sun
Has a thick atmosphere
One of the rocky planets
Has no moons
Question 2 (Matching Worth 4 points)
(06.02 LC)

Match the planet to its description.

Match Term Definition
Mars A) Liquid water covers more than 70% of its surface
Venus B) Has the hottest recorded surface temperatures of the solar system
Earth C) Iron oxide causes the red color of its soil
Mercury D) Is a rocky planet with extreme temperature changes
Question 3(Multiple Choice Worth 2 points)
(06.02 LC)

Which of the following statements is not a description of Earth's moon?

The moon has a very thin atmosphere.
The moon has some of the oldest rocks in the solar system.
The moon's rotation is the same as its revolution.
The moon has the same temperature all around.
Question 4(Multiple Choice Worth 3 points)
(06.02 LC)

Which of the following statements is not a description of Saturn?

Known for its rings
Largest planet in the solar system
One of the gas giant planets
Has several moons
Question 5(Multiple Choice Worth 3 points)
(06.02 MC)

According to the chart below, which planet has the smallest inner core?

Image describing the composition of the terrestrial planets (Mercury, Venus, Earth, and Mars) and the gas giants (Jupiter, Saturn, Uranus, and Neptune) of our solar system. Mercury is composed of 45 percent core, 50 percent mantle, and 5 percent surface crust. Venus is composed of 15 percent inner core, 20 percent outer core, 60 percent mantle, and 5 percent surface crust. Earth is composed of 5 percent inner core, 35 percent outer core, 55 percent mantle, and 5 percent surface crust. Mars is composed of 50 percent inner core, 45 percent outer core, and 5 percent surface crust. Jupiter is composed of 5 percent rock, 15 percent water, 60 percent metallic hydrogen, and 20 percent hydrogen gas. Saturn is composed of 10 percent rock, 20 percent water, 30 percent metallic hydrogen, and 40 percent hydrogen gas. Uranus is composed of 30 percent rock, 35 percent water, and 35 percent hydrogen. Neptune is composed of 15 percent rock, 60 percent water, and 25 percent hydrogen gas.

Mars
Jupiter
Venus
Earth
Question 6(Multiple Choice Worth 3 points)
(06.02 MC)

Two planets are orbiting a star. Planet A is closer to the star than Planet B. Which description explains the expected motion of Planets A and B?

The average speed of Planet B is faster than that of Planet A.
The average speed of Planet A is equal to that of Planet B.
The orbital period of Planet B is shorter than that of Planet A.
The orbital period of planet A is shorter than that of Planet B.
Question 7 (True/False Worth 2 points)
(06.02 LC)

Each planet is at an equal distance from the sun at all points in its orbit.

True
False

Answer:

use safety goggles

Explanation:

plz give me brainleist

Answer:

a) CaF₂.

b) 7.81g of CaF₂ are present.

Explanation:

a) The calcium ion has as charge Ca²⁺ and fluoride ion is F⁻, that means formula unit is:

CaF₂

b) 1 molecule of CaF₂ contains 2 anions, F⁻. Thus, the moles of CaF₂ is:

1.2x10²³ anions * (1 moleculeCaF₂ / 2 anions) = 6x10²² molecules of CaF₂

6.022x10²³ molecules = 1mol:

6x10²² molecules of CaF₂ * (1mol / 6.022x10²³molecules) = 0.10 moles CaF₂.

1 mole of CaF₂ has a mass of 78.07g:

0.10 moles CaF₂ * (78.07g / mol) =

7.81g of CaF₂ are present

Answer:

Basically, a variable is any factor that can be controlled, changed, or measured in an experiment. It's anything that can be changed in the experiment.

Explanation:

Scientific experiments have several types of variables. The independent and dependent variables are the ones usually plotted on a chart or graph, but there are other types of variables you may encounter. The presence/absence of the chemical is the independent variable. The health of the (ex:)rat (whether it lives and can reproduce) is the dependent variable.

Answer:

The mass (in grams) of precipitate is 0.6386 gram.

Calculation,

To find the mass of precipitate, first we have to find the precipitate. So, the chemical  reaction when cesium hydroxide react to large excess of \(TiSO_{4}\).

Mole of cesium hydroxide = given mass/molar mass = 2.34 gm/ 149.912 g/mol= 0.0156 moles

\(2CsOH+TiSO_{4}\)→\(Ti(OH)_{2} +Cs_{2} SO_{4}\)

So, mole ratio 2: 1

It means two moles of cesium hydroxide required to form one mole of titanium hydroxide.

To produce 0.0156 moles of cesium hydroxide = 0.0156 moles×1 mole/2

Mole of titanium hydroxide = 0.0078 mole

Mole of titanium hydroxide = given mass/molar mass of titanium hydroxide

Mole of titanium hydroxide = given mass/81.82 g/mol = 0.0078 mole

Mass of titanium hydroxide = 0.0078 mole ×81.88 g/mol  = 0.6387 gm

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The functional groups that could give a positive test with DNPH are ketones and aldehydes.

A positive test with 2,4 dinitrophenylhydrazine (DNPH) indicates the presence of a carbonyl group (C=O). Therefore, the functional groups that could give a positive test with DNPH are ketones and aldehydes.

By dissolving DNPH in a solution containing methanol and a little amount of strong sulfuric acid, Brady's reagent or Borche's reagent is created. This mixture is employed to find ketones and aldehydes.

Dinitrophenylhydrazone, a precipitate that is yellow, orange, or red, is a sign of a positive test.

Hydrocarbons, amines, alcohols, and carboxylic acids do not contain a carbonyl group and hence, they will not give a positive test with DNPH.

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Answer:

397,570 g/m^3

Explanation:

The volume of the cylinder can be calculated using its height and diameter.

Mass of the soil sample (m) = 30 g

Height of the cylinder (h) = 6 cm

Diameter of the cylinder (d) = 4 cm

First, we need to calculate the radius (r) of the cylinder

Radius (r) = diameter / 2 = 4 cm / 2 = 2 cm = 0.02 m

Now, we can calculate the volume (V) of the cylinder

V = π * r^2 * h

V = 3.14159 * (0.02 m)^2 * 0.06 m

V = 7.5398 E-5 m^3

Calculate the bulk density (ρ) using this formula

ρ = m / V

ρ = 30 g / 7.5398 E-5 m^3

ρ = 397,887 g/m^3

Answer:

12, 28, 16

Explanation:

If we are trying to find mass, neutrons are our guy. 28 "mass points" means 28 neutrons. Each neutron is one point

We know there are 12 protons and electrons if we look at a table of elements, the number in the top-left is always the number of protons and we can subtract mass from the protons to get our electrons

We control the volume of the gas in the pressure vs. volume experiment through Boyle's Law, the relationship between pressure and volume.

Boyle's Law: The Connection Between Volume and Pressure.

The volume of a gas reduces as pressure increases because the gas particles are pushed closer together. The ability of a gas to spread its particles farther apart causes its volume to increase as pressure decreases, in contrast. A gas can have its pressure or temperature altered in order to vary its volume. The volume of the gas would increase as the temperature rose. The volume of the gas would, however, drop if the pressure were raised. As a result, the relationship between the volume and pressure is inverse. Boyle's Law's constant, the gradient of a straight line, is determined by graphing pressure (p) against the volume's reciprocal (1/V). The number of gas particles per unit volume rises as volume declines.

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The energy in joules is supplied by a breakfast bar containing 170 nutritional calories is 711,280 joules.

To calculate the energy in joules supplied by a breakfast bar containing 170 nutritional calories, you can use the conversion factors provided:

1 nutritional calorie = 1000 calories

1 calorie = 4.184 joules

In order to determine the energy, we will convert the nutritional calories to calories and then calories to joules.

First, convert the nutritional calories to calories:

170 nutritional calories × 1000 calories/nutritional calorie = 170,000 calories

Next, convert the calories to joules:

170,000 calories × 4.184 joules/calorie = 711,280 joules

So, the breakfast bar provides 711,280 joules of energy.

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Answer:

24 oral syringes

Explanation:

The nitrate salt solutions of the eight metal cations (K, Ca, Cr, Mn, Fe, Co, Ni, Zn) are used in part I of the experiment because they are soluble in water. This allows for easy preparation of solutions for testing. Additionally, the eight nitrate salt solutions are not acidic, making them neutral and not interfering with the chemical reactions being studied.

The nitrate salt solutions of the eight metal cations, K, Ca, Cr, Mn, Fe, Co, Ni, and Zn, are used in part I of the experiment because they are soluble in water. This makes them easy to prepare and work with in the laboratory.

The solubility of these salts is due to the presence of nitrate ions, which are highly soluble in water. The metal cations in these salts are positively charged and can form bonds with the negatively charged nitrate ions, resulting in a stable and soluble compound.

In addition, the eight nitrate salt solutions are not insoluble, as insoluble salts would not dissolve in water, making it difficult to work with them in the laboratory. They are also not acidic, as nitrates are generally neutral in nature.

Overall, the solubility of the nitrate salt solutions of the eight metal cations makes them suitable for use in part I of the experiment, allowing for easy preparation and handling, as well as providing a stable and soluble compound for the reactions to occur.

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Answer:

Element Symbol Mass percent

Magnesium. Mg. 20.192%

Oxygen. O. 53.168%

Sulfur. S. 26.639%

Explanation:

hope this helps u out

The correct formula of the molecule is C4H9O2.

The model of a compound is a representation of the molecule. It gives us an idea of what the molecule looks like as well as its molecular formula.

Looking at the structure of the compound as shown in the model in the question, the correct formula of the molecule is C4H9O2.

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Answer:C4H9O2.

Explanation:

Answer:

car

Explanation:

Cars have hydraulic brake circuit that operates a car's brake's on four wheels.

Answer:

barbers chair

Explanation:

Okay, let's solve this step-by-step without using quadratics:

1) The equilibrium constant Kc = 0.36 means the equilibrium lies to the left. So there will be more N2O4 than NO2 at equilibrium.

2) The initial concentration of N2O4 is 0.1 mol dm^-3. Let's call this [N2O4]initial.

3) At equilibrium, the concentrations of N2O4 and NO2 will be [N2O4]equil and [NO2]equil respectively.

4) We know the equilibrium constant expression for this reaction is:

Kc = ([NO2]equil)^2 / [N2O4]equil

5) Setting this equal to 0.36 and plugging in 0.1 for [N2O4]initial, we get:

0.36 = ([NO2]equil)^2 / (0.1 - [NO2]equil)

6) Simplifying, we get:

0.036 = [NO2]equil^2

7) Taking the square root of both sides, we get:

[NO2]equil = 0.06 mol dm^-3

So the equilibrium concentration of NO2 is 0.06 mol dm^-3.

Let me know if you have any other questions! I can also provide a more step-by-step explanation if needed.

Answer: Ionic attractions

Explanation:

Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

The force exerted by the gas on the piston in newtons (N) is 38503.5N.

Pressure is the amount of force that is applied over a given area divided by the size of this area.

This means that the pressure can be calculated as follows:

P = F/A

Where;

According to this question, in a car piston, the pressure of the compressed gas (red) is 5.00 atm. If the area of the piston is 0.0760 m², the force exerted can be calculated as follows:

506625N/m² = F/0.0760m²

F = 38503.5N

Therefore, the force in Newtons is 38503.5N.

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Explanation

Given:

mass of glycol = 0.250g

mass of solvent (water) = 40g = 0.04 Kg

i = 1

Required: The boiling point of the solution

Solution

where Kb is the boiling point elevation constant

m is the molal concentration (molality) of all species

Step 1: Find the moles of glycerol

n = m/M

n = 0.250g/92,09382 g/mol

n = 2.71x10^-3 mol

Step 2: Find the molality

molality (m) = moles of solute/Kg of solvent

molality = 2.71x10^-3/0.04Kg

molality = 0.068 m

Step 3: Find the change in temperature

Kb of water = 0.512 cm^-1

DT = 0.512 x 0.068

DT = 0.035 'C

Step 4: Find the boiling point

Boiling point of water = 100 'C

DT = 0.035 'C

New boiling point =100 + 0.035 = 100.035 'C

Answer

100.035 'C

In the given unbalanced reaction, the number of sodium is not balanced. There must have two sodium in the product side also. The correct formula of sodium sulphate is Na₂SO₄.

According to the law of conservation of mass, the total mass of a system is conserved. Thus, mass can neither be created nor be destroyed. Therefore, for a chemical reaction, the total mass in the product side must be equal to the total mass in the reactant side.

The balanced equation of  a chemical reaction thus, obeying the mass conservation law where, each element have to be equal in number in both sides.

In the given reaction, the number of Na in reactant side is 2 and that in product side is 1 only. Thus total mass of sodium is not conserved. It can be corrected as Na₂SO₄ in the product side.

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Explanation:

According to the problem 0.2916 g of water were produced, so we have to find the number of moles of H in that sample of water. First we will convert those grams into moles using the molar mass of water.

molar mass of H = 1.01 g/mol

molar mass of O = 16.00 g/mol

molar mass of H₂O = 2 * 1.01 g/mol + 1 * 16.00 g/mol

molar mass of H₂O = 18.02 g/mol

moles of H₂O = 0.2916 g * 1 mol/(18.02 g)

moles of H₂O = 0.01618 moles

One molecule of H₂O contains two atoms of H. So 1 mol of H₂O molecules will contain 2 moles of H atoms. We can use that relationship to find the answer to our problem.

1 mol of H₂O = 2 moles of H

moles of H = 0.01618 moles of H₂O* 2 moles of H/(1 mol of H₂O)

moles of H = 0.03236 mol

Answer: 0.03236 mol of H atoms are present in the water produced.

Answer:

2 moles of oxygen

Explanation:

Basic Equation (given) :

2H₂ (g) + O₂ ⇒ 2H₂O (g)

Taking the number of moles of oxygen and water in proportion :

Therefore, 2 moles of oxygen are required to make 4 moles of water.

\( \textsf{\qquad\qquad\huge\underline{{\sf Answer}}} \)

As per the given equation, we can infer that :

For getting 2 moles mole of water, 1 mole of oxygen gas was required. so to get 4 moles of water we need :

We just have to multiply the whole reaction by 2 on both sides, in order to get 4 moles of H2O on product side.

\( \qquad \qquad \rm4 \: H_2 + 2 \: O_2 \rightarrow4 \: H_2O\)

therefore, we need

\(\qquad \sf  \dashrightarrow \: 2 \times 1 = 2 \: moles \: \: oxygen \: gas\)

Answer:

The correct option is;

C. It will become more brown

Explanation:

Given that the reaction is as follows;

Cl₂(g) + ICl (g) ⇄ ICl₃

We have that the reaction and a decrease in the concentration of the reactants will favor the reverse reaction that is the decomposition of the yellow iodine trichloride and the formation of green chlorine gas and brown iodine chloride

Given that some green chlorine gas, which is part of the reactant, will be removed, the reverse reaction will be favored and initial concentration of the yellow iodine trichloride and the green chlorine gas will be reduced while the proportional concentration of the brown iodine chloride will increase and the mixture will become more brown.

Answer:

become more green

Explanation:

S: -2  (Sulfur) , Br: -1  (Bromine), I: -1  (Iodine) ,Li: +1  (Lithium) ,Sr: +2  (Strontium) ,Mg: +2  (Magnesium) ,Na: +1  (Sodium) ,Cs: +1  (Cesium), Ba: +2  (Barium) ,F: -1  (Fluorine) ,O: -2  (Oxygen)

Magnesium is an essential mineral found in the human body. It plays an important role in the body, acting as a cofactor in over 300 enzyme systems that regulate diverse biochemical reactions in the body, including protein synthesis, muscle and nerve function, blood glucose levels, and blood pressure regulation. Magnesium is also involved in energy production and metabolism and is necessary for the proper functioning of muscles, nerves, and enzymes. It helps to keep bones strong, maintains normal heart rhythm, and helps to regulate blood sugar and blood pressure levels. Magnesium is found in many foods, including green leafy vegetables, nuts, seeds, and some types of seafood.

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Answer:

Explanation:

Properties of metals:

1. They have a lustre ( shine )

2. They have a silvery-grey or golden-yellow colour.

3. They conduct heat and electricity.

4. They are ductile ( can be drawn into wires ) .

5.They are malleable ( can be hammered into thin sheets ).

6. They are sonorous ( make a ringing sound when hit ).

Properties of non-metals:

1. They display a variety of colours.

2. They are poor conductors of heat and electricity.

3. They are not lustrous, ductile or malleable.

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The percentage weight of a solution containing 3.23 g NaCl in 77 g of the solution is 4.02%.

Mass Percent Concentration (mass %) = mass of solute (g) ÷ mass of solution (g) × 100%

To find the mass percent concentration of NaCl in a solution, divide the mass of the solute (NaCl) by the mass of the solution and then multiply by 100 to get the percentage.

The mass of NaCl in the solution is given as 3.23 g, while the mass of the entire solution is 77 g.

Percent weight = mass of solute ÷ mass of solution × 100% = 3.23 g ÷ 77 g × 100% = 0.0402 × 100% = 4.02%

Therefore, the percentage weight of the solution is 4.02%.

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Answer:

There is 13 atoms in total.

Explanation:

There is 2 potassiums, 4 borons and 7 oxygens.

So 2 + 4 + 7 = 13 atoms

Hope this helps!

Answer:oml felt

Explanation:

I'm sorry tho

Answer:

800-273-8255

Explanation:

here is the sui cide hotline number

Answer:

True, gasses can apply a force on an object.

84.02g/mol

Explanation:

To determine the molar mass of the unknown gas with a density of 3.45 g/L at 1.00 atm and 25.0 °C, you can use the following equation:

Molar Mass = (Density × Ideal Gas Constant × Temperature) / Pressure

First, convert the temperature to Kelvin: 25.0 °C + 273.15 = 298.15 K

Now, plug in the given values:
- Density: 3.45 g/L
- Ideal Gas Constant (R): 0.0821 L·atm/mol·K
- Temperature: 298.15 K
- Pressure: 1.00 atm

Molar Mass = (3.45 g/L × 0.0821 L·atm/mol·K × 298.15 K) / 1.00 atm

Molar Mass = 84.02 g/mol

So, the molar mass of the unknown gas is approximately 84.02 g/mol.

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