(02.01 LC)
Which landform represents a large area of thick ice that moves slowly?

Answer:

carbon

Explanation:

carbon has 6e- hence belong to group 4 and period 2

Answer:

Boron

Explanation:

Both silicon and boron are metalloids, and boron belongs on the second row (period)

Answer:

Theoretical yield = 16.76 g

Percent yield = 87%

Explanation:

Given data:

Mass of iron oxide = 23.5 g

Theoretical yield of iron = ?

Actual yield of iron = 14.5 g

Percent yield of iron = ?

Solution:

Chemical equation:

2Fe₂O₃ + 3C     →  4Fe + 3CO₂

Number of moles of iron oxide:

Number of moles = mass/molar mass

Number of moles = 23.5 g/ 159.69 g/mol

Number of moles = 0.15 mol

Now we will compare the mole of iron oxide with iron metal.

                      Fe₂O₃         :            Fe

                         2              :              4

                      0.15            :          4/2×0.15 = 0.3

Mass of iron:

Mass = number of moles × molar mass

Mass = 0.3 mol × 55.85 g/mol

Mass = 16.76 g

Percent yield:

percent yield = (actual yield / theoretical yield)× 100

Percent yield = (14.5 g / 16.76 g) × 100

Percent yield = 0.87 × 100

Percent yield = 87%

Answer:

I tried the answer above and it’s correct

Explanation:

Answer:

a: iron is a substance

Explanation:

because its hard and brittle and classified as a metal

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{13 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 21.594684...[/tex]

We have the final answer as

Hope this helps you

Answer:

Does the wave require a medium in order to travel?

Explanation:

The question whose answer would determine whether the wave in question is mechanical or electromagnetic would be if the wave requires a medium in order to travel or otherwise.

A mechanical wave would require a medium in order to transport its energy from one place to another, that is, travel. On the other hand, an electromagnetic wave does not require any medium in order to travel, that is, it can travel through vacuums or empty spaces. Light and sound waves are typical examples of electromagnetic and mechanical waves respectively.

Answer:

Carbohydrates can be represented by the stoichiometric formula (CH2O)n, where n is the number of carbons in the molecule. Therefore, the ratio of carbon to hydrogen to oxygen is 1:2:1 in carbohydrate molecules.

Explanation:

May I have brainliest please? :)

Answer:

(CH2O)n, where n is the number of carbons in the molecule.

Explanation:

Also remember the 1:2:1 ratio of carbon:hydrogen:oxygen

Answer:

1.65hr

Explanation:

Given parameters:

Number of labs  = 5 labs

 Time taken  = 3 minutes

Unknown:

Time taken in hours to grade 165 labs  = ?

Solution:

Let us find the rate of the teacher;

  Rate  = [tex]\frac{number of labs}{time}[/tex]  

  Insert the parameters and solve;

   Rate  = [tex]\frac{5}{3}[/tex]   = 1.67labs/min

Now;

   Time to grade 165 labs  = [tex]\frac{number of labs}{rate}[/tex]  

   Time to grade 165 labs  = [tex]\frac{165}{1.67}[/tex]   = 98.8min

  Since;

               60min = 1hr

               98.8min  = [tex]\frac{98.8}{60}[/tex]   = 1.65hr

Answer: gamma-ray telescopes

Explanation:

this is the answer because the question is asking what telescope must be

placed to observe SHORT-WAVELENGTH radiation. Gamma-rays have very short wave-lengths so therefore it would be gamma-ray telescopes. visible, infrared, and radio all have long wave-lengths, so we can instantly eliminate them.

The Earth's atmosphere is known to be able to blocks all X-rays from space.  telescopes must be places in orbit around Earth in order to observe short-wavelength radiation is gamma-ray telescope.

X-rays is known to have high energy that are in reflecting telescope. Gamma rays from space is commonly blocked by the Earth's atmosphere as the radiation is lethal.

This rays are able too be detected by the optical flashes that they emit when interacting with the material in a particular defined instrument.

Learn more about Gamma-ray telescope from

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Answer:

There are four σ bonds and no lone pairs around phosphorous atom in the lewis structure of H3PO4 molecule. Therefore total number of VSPER pairs are four. Therefore, shape of molecule around phosphorous atom is tetrahedral.

Explanation:

There are four σ bonds and no lone pairs around phosphorous atom in the lewis structure of H3PO4 molecule. Therefore total number of VSPER pairs are four. Therefore, shape of molecule around phosphorous atom is tetrahedral.

therefore total number of vsper pairs of four. Therefore, shape of molecule around phosphorous atom is tetrahedral.

Loose sugar dissolves much faster than a sugar cube because loose sugar (a) has greater surface area.

When any solute dissolve in ground into small pieces it dissolve faster in solvent than large pieces because in small ones the large surface area is exposed into solvent.

With the greater surface area is exposer, the contact in between the solute particles and the solvent is more. this is the reason that loose sugar cube dissolve much faster than sugar cube as sugar cube has less surface area in contact with solvent.

Thus, Loose sugar dissolves much faster than a sugar cube because loose sugar (a) has greater surface area.

To learn more about solubility here

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Answer:

2AL(ClO3)3 → 2ALCl3 + 9O2

Explanation:

Answer:

1250kg

Explanation:

Given parameters:

Acceleration  = 1.2m/s²

Force  = 1500N

Unknown:

Mass on the vehicle  = ?

Solution:

According to newton's second law of motion:

  Force  = mass x acceleration

Since mass is the unknown, insert the parameters and solve;

       1500  = mass x 1.2

        mass = [tex]\frac{1500}{1.2}[/tex]   = 1250kg

Explanation:

- sodium is an alikal metal and chlorine is a halogen

-sodium forms metallic bond while chlorine cant

- chlorine is an oxidant while sodium is a reducing agent

The chemical equation is said to be balanced if the number of atoms in the reactants and products is the same

Equation balanced ⇒ total number of atoms in reactants(on the left)= total number of atoms in products(on the right)

H₂+O₂---> H₂O

Reactants : H₂, O₂

Products : H₂O

not balanced

H₂O₂ ---> H₂O+O₂

Reactants : H₂O₂

Products : H₂O, O₂

not balanced

Na+O₂ ---> Na₂O

Reactants : Na, O₂

Products :  Na₂O

not balanced

N₂+H₂ ---> NH₃

Reactants : N₂, H₂

Products :  NH₃

not balanced

P₄+O₂---> P₄O₁₀

Reactants : P₄, O₂

Products :  P₄O₁₀

not balanced

Fe+H₂O ----> Fe₃O₄ + H₂

Reactants : Fe, H₂O

Products :  Fe₃O₄

not balanced

Answer:

The answer is (c)

Explanation:

Answer:

C. The most common religion is Catholism.

Explanation:

I'm taking the quiz rn.

Answer:

[tex]V_2=18 \ L \ H_2[/tex]

General Formulas and Concepts:

Chemistry - Gas Laws

Explanation:

Step 1: Define

Initial Volume: 5.0 L H₂ gas

Initial Temp: 273 K

Final Temp: 985 K

Final Volume: ?

Step 2: Solve for new volume

Step 3: Check

We are given 2 sig figs as the smallest. Follow sig fig rules and round.

[tex]18.0403 \ L \ H_2 \approx 18 \ L \ H_2[/tex]

Answer:

B. Density stays the same no matter how much of a substance there is.

Explanation:

Density of the substance is the same and it is the measure of its mass per unit volume. Thus, the mass of titanium per  1 cm³  is 4.506 g which is the same for 10 g, 100 g or whatever the mass.

Density of a substance is the measure of its mass per unit volume. It describes how closely its particles are packed.  Density of an object depends on its bond type, temperature and pressure.

The more denser the object is , more will be its mass distribution per unit volume. Substances denser than water will sink on it otherwise they float on water.

Density is constant for a substance, the distribution of given mass per unit volume is same for all masses. Hence, the density of 100 g Ti is same as that of 10 g. i.e., 4.56 g/cm³.

To find more on density, refer here:

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Answer:

He traveled at a speed of 4 m/s with a velocity of 4m/s north, and his acceleration changed when stopping for lunch.

Explanation:

Trust me took test got it right!

Answer:

190+2=192

Explanation:

192 add it 192 added

Answer: they are right

Explanation:

Answer:

[tex].5865 \\ \\ \\ \\ \\ \5865[/tex]

[tex] \\ \\ 5865 \inf \inft \cos( \\ \) [/tex]

Answer:

λ  = 0.5×10⁻⁶ m

Explanation:

Given data:

Frequency of light = 6.01 ×10¹⁴ Hz

Wavelength of light = ?

Solution:

Formula:

Speed of light = wavelength × frequency

Speed of light = 3×10⁸ m/s

3×10⁸ m/s = λ × 6.01 ×10¹⁴ Hz

λ  = 3×10⁸ m/s / 6.01 ×10¹⁴ Hz

        Hz = 1/s

λ  = 0.5×10⁻⁶ m

Answer:

Its D. Light energy to to electrical energy

Explanation:

Answer:

D. Light energy to electrical energy

Explanation:

its lowkey obvious lol

Answer:

E is the anwser

Answer:

D. Volume

Explanation:

Properties mentioned in the question;

colour = gray

Nonmetallic

Density = 3.8 g/mL

Volume = 48.3 mL

Of the mentioned, which is extensive ?

Extensive properties are those properties that are proportional to the amount of substance present.

The correct option is D. Volume. The other properties do not change with increasing or decreasing amount of the mineral

Answer:

c )C02

d)CaO + CO2

Explanation:

the masses of the elements are conserved

Answer:the 4th one is incorrect,and the 1st one is incorrect hope this helps.

Adsorption is defined as a process in which gas molecules tend to adsorb on the surface of a solid solvent.

Therefore, the statement solids are not able to act as a solvent if a gas is the solute, is false.

On the other hand, gases can also act as a solvent if a solid is the solute.

Explanation:

Adsorption is defined as a process in which gas molecules tend to adsorb on the surface of a solid solvent.

Therefore, the statement solids are not able to act as a solvent if a gas is the solute, is false.

On the other hand, gases can also act as a solvent if a solid is the solute.For example, air present in the surrounding acts as a solvent and solid substances present in the surrounding acts as a solute.

Hence, the statement gases are not able to act as a solvent if a solid is the solute, is false.

Thus, we can conclude that following are the statements which are incorrect.

Solids are not able to act as a solvent if a gas is the solute.

Gases are not able to act as a solvent if a solid is the solute.