Filters

American National Curriculum

Structure And Properties Of Matter

Structure And Properties Of Matter - Chemistry Questions asked by Filo students

Question 21

Views: 5,502

Chapter Test The Simple Sentence Underline the subjects and verbs in these sentences and put an

S

above each subject and a

V

above each verb.

The smell of freshly baked bread at the bakery near my apartment is making me hungry.
After a dental check-up, Dr. Talbott usually gives me a small bag with a new toothbrush and a small tube of toothpaste.
Inside the pancake restaurant are bright yellow booths and post with photos of every kind of pancake and topping in the world.
Didn't you ever dream about living in a big city?
The warm wind in my hair and the sun in my eyes were a pleas change from the sleet and snow at home.
Kyla never asked about. my background or questioned my me for leaving town suddenly.

Topic:

Structure and Properties of Matter

View solution

Question 22

Views: 5,684

How many atoms are there in

35.3 g

of carbon monoxide (CO)?

Topic:

Structure and Properties of Matter

View solution

Question 23

Views: 5,236

S1 Final Chemistry All of the questions on this Final ask about the following situation: Solid aluminum, Al(s), is dropped into hydrochloric acid,

HCl (aq)

. The masses of the substances are listed below. - Mass of

Al = 700 g

HCl = 3000 g

"Note: There is no lodine (i) anywhere in this final. It is always aluminum (AI), or chlorine (CI). 2. Identify the type of bond for

HCl

. - Identify the type of bond among the Al atoms. - Is the octet rule satisfied for each compound? Explain. 3. Will this reaction happen? How do you know? 14

Topic:

Structure and Properties of Matter

View solution

Question 24

Views: 5,905

What is the percent abundance of post-1982 pennies in the data sample? Post-1982\% Abund. Enter

Topic:

Structure and Properties of Matter

View solution

Question 25

Views: 5,730

Robert Boyle did not believe that water was one of the basic elements that all substances were made of. To this, he conducted an experiment where he ran an electric current through water. He placed two test tubes above each of the terminals of the electricity source and collected the gas that came out. He repeated the experiment a total of three times, each timesusing the same amount of water and the same level of electric urrent. These are his experimental results: 2. The statement "Robert Boyle did not believe that water was one of the basic elements" is an exat a...

Hypothesis
Conclusion
Independent Variable
Constant

Topic:

Structure and Properties of Matter

View solution

Question 26

Views: 5,515

1. Define plasical and chemical properies, provide three examples of each, discuss their reversibility, and explain fondamental differences between them Physical properties is a process whereby properties can be observed without changing its chemical composition. Ixamples are volume,color and molecular weight, while chemical properties is a defined as the characteristics of a particular substance that can be observed only after changing its chemical reaction xubstance I sample, heat of combustion, its reactivity and its flammability and pll value. The fundamental diferences between pliysical and chemical properties are as follows (a) Chemical properties are related to chemical boumd of the substance while physical are not In chemical properties, the chemical identify of a substance are been changed while pliysical preperties are not. Chemical properties use to infer the the reaction of substance while in physical propertics it is enly describes the appearance of the substance. 2. Density is a physical preperty of a molecule that's measured as mass per unit volume. Given that density is usually cepressed in the units of

g / cm^{'}

, calculate the density of a cube of plastic that has a mass of

2331 g

and an edee length of

1.500 cm

(volume of a cube is

Y = P

). Be sure to show all steps in the process and include units throughout the problem. Density is said to be the ratio of mass of volume to volume. Mass of the cube

= 2331 g

(1) = 1.500 cm

(v = 1^{'}) = 1. 5^{'} = 3.375 cm^{3}

so we have that the density Density

=

= \frac{2.331}{3.375 cm ^{3}} = 0.691 g / cm^{3}

3 Two hiquids are in a graduated cylinder - Liquid

A

has a density of

1.004 g / cm^{'}

B

has a density of

06223 g / cm^{3}

. Assuming that they do NOT mix, which liquid is on top and which hiquid is on bottom? Where would you expect to find the plastic cube from Question 22 if it is dropped into the gaduated cylinder with these two liquids? Liquid

A

= 1.004 g / cm^{'} = 1.00 4_{g} / cm^{3}

Liquid B density is

= 0.622 3_{v} / cm^{3}

A

seems to be more denser than that of liquid

B

B

would float when mixed with liquid B Therefore, according to the experiment liquid

B

will be on the up while one in liquid

A

will be at the down If it is dropped into the graduated cylinder with these two liquids. The density of

A

is more than that of

B

B

would be on the top while the cube and liquid in

A

will be at the bottom. 4. Three quantum numbers are derived from Schrodinger's equation that describe the probability of finding an Lectron around a nucleus: the principal quantum number, the angular momentum quantum number, and the magnefic quantum number. Explain each quantum number, including associated shapes, numbers, lenters, and values in your own words. Principle quaritum number is deseribes as the size of the orbital and the main energy level. It is represented by n. where

n = 1, 2, 3, 4 \dots

stand for K,L, N shell and so on. Angular momentum quantum number is deseribes the shape of the orbital. Is is represented as '

I

', ita value ranges from 0 to

(n - 1)

= 0, 1, 2.3 \dots

. the orbitals are s, p, d, f... Magnetic Quantun Number it deseribe the orientation of the orbitals. Its quantum number value range when

1 - 2

, the value will be from

- 2, - 1, - 0) + 1

, +2 5. Write the full electron configuration for phosphorus, atomic symbol P Phosphorus clectron configuration.

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{3}

, and it start from this confinguration notation heips to provide casy way to its to write and communicate how electrons are been arranged around the nucleus of an atom. Is, to 25,

3 s

up to 58 . 6. Identify if phosphorous is paramagnetic or diamagnetic and explain why. Phosphorus is paramagnetic because it has 3 unpaired electrons in their outemost shell which gives phospho the properties it has 7. Compare and contrast the alkali metals and the alkaline earth metals by filling in the table below.

Topic:

Structure and Properties of Matter

View solution

Question 27

Views: 5,900

11. Draw the Lewis structure for sulfur tetrafluoride,

S_{4}

You can write on paper and then take a pic and paste it in the document. 42. Draw the electron pair geometry for sulfur tetrafluoride,

SF_{4}

. What's the name of the molecular shape of sulfur teforfluoride? Note: You can draw this on paper, take a picture, and paste the picture in your document. 13. Draw the structure of water. Is water considered polar or nonpolar? Explain why? Note: You can draw this on faper, take a pieture, and paste the picture in your document. 14/When someone is injured, responding medical personnel may use either hot packs or cold packs to treat the injuries. These are examples of miniature chemical reactions. Using hot packs and cold packs as an example, explain the terms endothermic reaction and exothermic reaction. 15. Combustion reactions take place between a fuel and oxygen and produce carbon dioxide and water. Balance the following combustion reaction.

□ C_{2} H_{6} O + □ O_{2} \to □ CO_{2} + □ H_{2} O

16. Aqueous lead (II) nitrate,

Pb (NO_{3})_{2}

undergoes a double displacement reaction with aqueous sodium chloride,

NaCl

, in which a precipitate forms. If the precipitate contains lead, write the balanced chemical equation for this re-ction. Be sure to include the states of each of the reactants and products. 12. Explain the four basic types of chemical reactions. Be sure to include a sample equation for each type. I Describe how rate relationships and activation energy are important in chemical reactions. 9. White the equilibrium expression for the following reaction.

CaO (s) + CH_{4} (g) + 2 H_{2} O (g) ⇌ CaCO_{3} (s) + 4 H_{2} (g) Kp = 2344

20. Osing the equilibrium expression from Question

#19

and based upon the value of

K

, would you expect there to be more or less product in the equilibrium mixture? Explain why.

CaO (s) + CH_{4} (g) + 2 H_{2} O (g) ⇌ CaCO_{3} (s) + 4 H_{2} (g) Kp = 2344

Topic:

Structure and Properties of Matter

View solution

Question 28

Views: 5,234

11. Draw the Lewis structure for sulfur tetrafluoride, SFA You can write on paper and then take a pic and paste it in the document. 2. paw be clectron puir geomenty for sulfur tetrantluonide, SF, What's the name of the molecular shape of sulfur stothermic reaction and exothermic reaction. tween a fucl and oxygen and produce carbon dioxide and water. Balance Combustion reactions take place brion. 46. Aucous leas (II) nirrate,

Pb (NO O

) , undergocs a double displacement reaction with aqueous sodium chloride, Nol, in which a precipitate forms. If the precipitate contains lead, write the balanced chemical equation for this 2. Eeplain the four basic types of chemical reactions. Be sure to include a sample equation for each type. 7. pescribe how rate relationships and activation energy are important in chemical reactions. W. Wonte the equilibrium expression for the following reaction.

CaO (s) + CH_{4} (g) + 2 H_{2} O (g) ⟹ CaCO_{3} (s) + 4 H_{2} (g) Kp = 2344

20. 0sing the equilibrium expression from Question

#19

and based upon the value of

K

, would you expect thet be more or less product in the equilibrium mixture? Explain why.

CaO (s) + CH_{4} (g) + 2 H_{2} O (g) ⇌ CaCO_{3} (s) + 4 H_{2} (g) Kp = 2344

Topic:

Structure and Properties of Matter

View solution

Question 29

Views: 5,639

You can write on paper and then take a pic and paste it in the document. 2. Draw the electron pair geometry for sulfur tetrafluoride,

SF_{4}

. What's the name of the molecular shape of

s

tereffluoride? Note: You can draw this on paper, take a picture, and paste the picture in your document. 13. Draw the structure of water is water considered polar or nonpolar? Explain why? Note: You can draw this paper, take a picture, and paste the picture in your document. 14. When someone is injured, responding medical personnel may use either hot packs or cold packs to treat the injuries. These are examples of miniature chemical reactions. Using hot packs and cold packs as an example, explain the terms endothermic reaction and exothermic reaction. 15. Combustion reactions take place between a fuel and oxygen and produce carbon dioxide and water. Balance iherollowing combustion reaction.

□ C_{2} H_{6} O + □ O_{2} \to □ CO_{2} + □ H_{2} O

46. Aqueous lead (II) nitrate,

Pb (NO_{3})_{2}

undergoes a double displacement reaction with aqueous sodrum chloride, Nare, in which a precipitate forms. If the precipitate contains lead, write the balanced chemical equation for this reection. Be sure to include the states of each of the reactants and products. 1. Explain the four basic types of chemical reactions. Be sure to include a sample equation for each type. If Describe how rate relationships and activation energy are important in chemical reactions. 9. Woute the equilibrium expression for the following reaction.

CaO (s) + CH_{4} (g) + 2 H_{2} O (g) ⇌ CaCO_{3} (s) + 4 H_{2} (g) Kp = 2344

20. Osing the equilibrium expression from Question

#19

and based upon the value of

K

, would you expect there to be more or less product in the equilibrium mixture? Explain why.

CaO (s) + CH_{4} (g) + 2 H_{2} O (g) ⇌ CaCO_{3} (s) + 4 H_{2} (g) Kp = 2344

Topic:

Structure and Properties of Matter

View solution

Question 30

Views: 5,208

Which option best describes a marine climate?

warm winters and cool summers
cold temperatures year-round
cold winters and hot summers
warm temperatures year-round

Topic:

Structure and Properties of Matter

View solution

Found the solution, but did not understand the concept?

Connect with a tutor in less than 60 seconds 24x7

Ask my first question

Question 31

Views: 5,414

What is the change in enthalpy when

250 g

of water evaporates at

10 0^{\circ} C

(Δ H_{v} = 40.67 \frac{k J}{m o l})

Molar Masses - Hydrogen:

1.0079 g / mol

16.00 g / mol

Calculate the heat in kJ. Round to two decimal places. Enter the number of kJ only; no units. Your Answer:

564.45

Topic:

Structure and Properties of Matter

View solution

Question 32

Views: 5,145

Metallic osmium, Os, has a density of

22.59 g / cm^{3}

the largest known elemental density. What is osmium's density in

kg / m^{3}

g

Subrith Answer Try Another Version 10 item attempts remaining

Topic:

Structure and Properties of Matter

View solution

Question 33

Views: 5,289

From the following enthalpy changes,

C (s) + 1/2 O_{2} (g) \to CO (g) CO (g) + 1/2 O_{2} (g) \to CO_{2} (g) Δ H^{\circ} = - 110.5 kJ Δ H^{\circ} = - 283.0 kJ

calculate the value of

Δ H^{\circ}

for the reaction

C (s) + O_{2} (g) \to CO_{2} (g)

Topic:

Structure and Properties of Matter

View solution

Question 34

Views: 5,258

How would you calculate the reaction rate of a chemical reaction? Determine the change in concentration of reactants between two points, and subtract it by the change in time. Determine the change in concentration of reactants between two points, and add it to the change in time. Determine the change in concentration of reactants between two points, and divide it by the change in time. Determine the change in concentration of reactants between two points, and multiply it by the change in time.

12345678910

Topic:

Structure and Properties of Matter

View solution

Question 35

Views: 5,387

testplayerv1.aakash.ac.in/testpar 16

\approx

Review Isopropyl bromide react with zinc in hydrochloric acid gives hydrocarbon

A

as major product. The correct IUPAC name of

A

is Only one correct answer

Isobutane
2,3-Dimethylbutane
Propane
Hexane

Topic:

Structure and Properties of Matter

View solution

Question 36

Views: 5,884

WAEC Past Questions Download mobile app to study offline Prepare for JAMB too, all in one app 14 The effect of the demand for product

A

caused by a change in the price of a product

B

cross-elasticity of demand
elasticity of supply
competitive demand
composite demand
joint demand

Topic:

Structure and Properties of Matter

View solution

Question 37

Views: 5,567

View Answer \& Discuss (15) JAMB 1978 (15 Which of the following can be regarded as a liability of a commercial bank?

advances
deposits
treasury bills
overdrafts
cash

Topic:

Structure and Properties of Matter

View solution

Question 38

Views: 5,465

How many electrons does hydrogen have?

Topic:

Structure and Properties of Matter

View solution

Question 39

Views: 5,269

How do you calculate atomic number of an element?

Topic:

Structure and Properties of Matter

View solution

Question 40

Views: 5,422

Is cooking an egg an example of a physical or chemical change?

Topic:

Structure and Properties of Matter

View solution

Prev

1 2 3 4 5 6 7

Next

Get instant study help from an expert tutor 24/7