Chemistry Middle School

WILL MARK BRAINLIEST IF CORRECT
Calculate the average rate of change for the graphed sequence from n = 1 to n = 3. graphed sequence showing point 1, 2, point 2, 4, point 3, 8, point 4, 16, point 5, 32, and point 6, 64

A. 1

B. 2

C. 3

D. 6

WILL MARK BRAINLIEST IF CORRECTCalculate The Average Rate Of Change For The Graphed Sequence From N =

Answers

Answer 1

Answer:it b

Explanation:

I've done that before

Answer 2

Answer:

The Answer is C or 3

Explanation:

I took the test

Related Questions

Cracking of octane please help! Show the chemical formula and the diagrams

Answers

Answer:

Fuels made from oil mixtures containing large hydrocarbon molecules are not efficient as they do not flow easily and are difficult to ignite. Crude oil often contains too many large hydrocarbon molecules and not enough small hydrocarbon molecules to meet demand. This is where cracking comes in

Explanation:

PLS HELP!! Need help with this asap.

Answers

Answer:

22.6881 Grams of CO

Explanation:

Fe2O3 + 3CO = 3CO2 + 2Fe

Ratio

1:3 = 3:2

How many grams of CO are needed to produce 30.2 grams of Fe

Fe2O3 Molar mass: 159.69 g/mol

CO Molar mass: 28.01 g/mol

Fe Atomic mass: 55.845

Ok so our end result is 30.2 Grams of Fe, we have 2 Fe so we have 15.1 Grams per Fe

15.1/55.845 = 0.27

So then we multiply this by 3 as we we know the ratio and get get 0.81 required as this is 3CO.

So we need 0.81 Moles of CO so we need 22.6881 Grams of CO.

What are these labels?

Answers

Answer:

From left to right

Neutral

Acid

Base

Explanation:

So using HSAB theory hard and soft (Lewis) acids and bases.

OH - Is a Hard Base

H+ Strong Acid

What is the percent by mass in a solution with 10.0 grams of solute and 25.0 grams of solvent?

Answers

Answer:

Percent by mass of solute is (10/35) x 100 =  28.57%

Percent by mass of solvent is (25/35) x 100 = 71.43%

Explanation:

10.0 grams of solute

25.0 grams of solvent

Total Mass = 35 grams

percent by mass = (Mass A / Total Mass) x 100

Percent by mass of solute is (10/35) x 100 =  28.57%

Percent by mass of solvent is (25/35) x 100 = 71.43%

The symbol ∆hf0 stands for

Answers

Answer:

standard heat of formation for compound

Explanation:


What are substances on the right side of a chemical equation
called?
a. reactants
b. groups
C. products
d. electrons

Answers

Answer:

The substances on the right side of a chemical equation are the products as reactions typically move from left to right.

A chemical equation is a representation of chemical reaction in the form of symbols and formulae where the reactants are on left side and the products on right side.

Eg. CaCO3(s)→CaO(s)+CO2(g

What is chemical equation?

Chemical equation is written "with the reactants on the left side of an arrow and the products of the chemical reaction on the right".

What is a reactant?

Reactants are "the starting materials in a chemical reaction".

What is a product?

A product is "a chemical species resulting from a chemical reaction".

Hence, the substances on the right side of a chemical equation are products.

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An iron nail with a mass of 12 grams absorbs 12 Joules of heat. If the nail was initially at 25°C, what is the final temperature?

Answers

The answer to “An iron nail with a mass of 12 g absorbs 15 J of heat. If the nail was initially at 28 °C, what is its final temperature?” is broken down into a number of easy to follow steps, and 27 words. Since the solution to 81P from 3 chapter was answered, more than 4841 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 81P from chapter: 3 was answered by , our top Chemistry solution expert on 05/06/17, 06:45PM. Introductory Chemistry was written by and is associated to the ISBN: 9780321910295. This textbook survival guide was created for the textbook: Introductory Chemistry, edition: 5. This full solution covers the following key subjects: nail, iron, heat, initially, final. This expansive textbook survival guide covers 19 chapters, and 2045 solutions.

TRUE OR FALSE

As the human population increases, demand for natural resources will also increase.

Answers

It’s true, as the human population grows, our consumption of natural recorded increases

Why is rusted iron an example of an oxidation reduction reaction A. Electrons are exchanged B. Heat is generated C. Iron combines with oxygen D. Iron becomes molten E. Oxygen is used

Answers

Answer:

C

Explanation:

Oxygen & water form rust

Calculate the molar mass of the following compounds in g/mol.
CH3CO2H

Answers

Answer:

60g/mol

Explanation:

By using nucleon numbers given on the periodic table, the mass of 1 mole of each element is:

C= 12g

H= 1g

O= 16g

Since molar mass is the sum of the masses of each element present in the compound,

Molar Mass (Mr) = 12+3(1)+12+16(2)+1 = 60g/mol

Which gas relights a glowing splint? *

C hydrogen
A ammonia
B carbon dioxide
D oxygen

Answers

Answer:

Oxygen

Explanation:

A glowing splint applied to a sample of gas "oxygen" will relight.

A company wants to put a fleet of low Earth satellites in orbit to create a worldwide telephone link. There is less of a time lag in the conversations the closer to the ground the satellites are. What advantage is there to putting them 700 km up, instead of 250 km up in the sky

Answers

If your wanting to know less of the time:


70

250

what element must combine with the metal for oxidation to take place?

Answers

lithium with oxygen
Lithium with oxygen

A bobsled has a momentum of 4000 0 kg* m/s to the south. Friction on the track reduces its momentum to 500 kg* m/s to the south. What impulse is applied to the bobsled by the friction?

A. 6500 kg* m/s north

OB. 1500 kg* m/s south O

C. 6500 kg* m/s south

O 1500 kg* m/s north

Answers

The correct answer is c

Answer: 1500 kg•m/s north

Explanation:

A PE X

How do the HOX genes in the paddlefish match the HOX genes in human

Answers

Answer:

Hox are transcription factors that are evolutionarily conserved across bilaterians and, therefore, they share sequence homology between paddlefish and humans .

Explanation:

The Hox genes represent a family of homeodomain transcription factors that play roles in the development of the axial and appendicular skeleton, being therefore critical during embryonic development. In this case, the human Hox genes are homologous to homeobox genes found in the paddlefish. These genes have a DNA-binding domain of 60 amino acids which is evolutionarily conserved in bilaterian species including paddlefish and human species.

PLEASE HELP ME ASAP! CHEMISTRY TUTOR

SEE ATTACHED

Answers

Answer:

[tex]\large \boxed{\text{-827.4 kJ}}[/tex]

Explanation:

We have three equations:

1. 2H₂S(g)            + O₂(g)   ⟶ 2S(s, rhombic) + 2H₂O(g) ; ∆H = -442.4 kJ

2. S(s, rhombic)  + O₂(g)   ⟶ SO₂(g);                                 ∆H = -296.8 kJ

3. PbO(s)             + H₂S(g) ⟶ PbS(s)               + SO₂(g);    ∆H =  -104.3 kJ

From these, we must devise the target equation:

4. 2PbS(s)            + 3O₂(g) ⟶2PbO(s)             + 2SO₂(g); ΔH = ?

The target equation has PbS(s) on the left, so you reverse Equation 3 and double it.

When you reverse an equation, you reverse the sign of its ΔH.

When you double an equation, you double its ΔH.

5. 2PbS(s) + 2H₂O(g) ⟶ 2PbO(s) + 2H₂S(g); ∆H = 208.6 kJ

Equation 5 has 2H₂O on the left. That is not in the target equation.

You need an equation with 2H₂O on the right, so you copy Equation 1.  

6. 2H₂S(g) + O₂(g) ⟶ 2S(s, rhombic) + 2H₂O(g) ; ∆H = -442.4 kJ  

Equation 6 has 2S(s, rhombic) on the right. That is not in the target equation.

You need an equation with 2S(s, rhombic) on the left, so you double Equation 2.  

7. 2S(s, rhombic)  + 2O₂(g) ⟶ 2SO₂(g); ∆H = -593.6 kJ

Now, you add equations 5, 6, and 7, cancelling species that appear on opposite sides of the reaction arrows.

When you add equations, you add their ΔH values.

You get the target equation 4:

5. 2PbS(s)  + 2H₂O(g)  ⟶ 2PbO(s) + 2H₂S(g);  ∆H =  208.6 kJ

6. 2H₂S(g) + O₂(g)        ⟶ 2S(s)     + 2H₂O(g) ; ∆H = -442.4 kJ

7. 2S(s)      + 2O₂(g)      ⟶ 2SO₂(g);                   ∆H = -593.6 kJ

4 . 2PbS(s) + 3O₂(g)      ⟶ 2PbO(s) + 2SO₂(g); ΔH = -827.4 kJ

[tex]\Delta H \text{ for the reaction is $ \large \boxed{\textbf{-827.4 kJ}}$}[/tex]

What forces does an electrically charge object experience because of its charge?

Answers

Answer:

electric force and newtons law

Explanation:

When potassium chromate (K2CrO4) is added to a solution containing 0.500 g silver nitrate (AgNO3), solid silver chromate (Ag2CrO4) is formed. a) Determine the theoretical yield.

Answers

Answer:

Theoretical Yield = 0.4882 grams

Explanation:

Potassium Chromate = K2CrO4 Molar mass: 194.1896 g/mol

Silver Nitrate = AgNO3 Molar mass: 169.87 g/mol

Silver(I) Chromate = Ag2CrO4 Molar mass: 331.73 g/mol

Potassium Nitrate = KNO3  Molar mass: 101.1032 g/mol

K2CrO4 + 2AgNO3 = Ag2CrO4 + 2KNO3

Potassium Chromate + Silver Nitrate = Silver(I) Chromate + Potassium Nitrate

Ratio 1:2 = 1:2

0.5g AgNO3

AgNO3 Molar mass: 169.87 g/mol

2AgNO3 = 339.74grams

0.5/339.74 = 0.0014717

Ag2CrO4 Molar mass: 331.73 g/mol

0.4882 grams

Theoretical Yield = 0.4882 grams

A transformer has ten turns of wire on the input side and 50 turns of wire on the output side. If the input voltage is 120 V, what will the output voltage be?

Answers

Answer:

600 V

Explanation:

The transformer equation helps us to calculate the relationship between the ratio of the number of turns of coils in the input and output sources to their respective voltages.

It states that the ratio of the secondary to primary voltages in a transformer equals the ratio of the number of loops in their coils.

Number of input turns/Number of output turns = input voltage/output voltage

10/50 = 120V/output voltage

output voltage = 120 V/0.2

Output voltage = 600 V

The picture represents _________________.

A . Compounds

B . Mixture of Elements and Compounds

C. Mixture of Elements

D. Elements

E. Mixture of Compounds

Answers

B...................

Assign an oxidation number to each element in the reaction.
CO(g) + 2H2(g)
CH3OH(g)
In CO, the oxidation number of C is
and that of O is
In H2, the oxidation number of H is
In CH3OH, the oxidation number of C is
that of O is
and that of H is
DONE
​

Answers

Answer:

In CO, the oxidation number of carbon is +2 and that of oxygen is -2

In H2 the oxidation number of hydrogen is zero

In CH3OH, the oxidation state of carbon is -2, that of hydrogen is +1 and that of oxygen is -2

Explanation:

The oxidation number of an element in any compound is defined as the electrical charge that the element appears to have as determined by a set of arbitrary rules. These rules make it possible to calculate the oxidation number of an atom in a compound given the oxidation numbers of other atoms in the same compound.

In CO, the oxidation number of carbon is +2 and that of oxygen is -2

In H2 the oxidation number of hydrogen is zero

In CH3OH, the oxidation state of carbon is -2, that of hydrogen is +1 and that of oxygen is -2

20. Which of the following is NOT true for the atoms 13N, 14N, and 'N?
a. They all have the same mass number.
b. They are isotopes.
c. They all have the same atomic number.
d. They all have 7 protons.
e. They all have 7 electrons.

Answers

Answer:

a ,e

Explanation:

math

They all have the same mass number

Which functional group defines a ketone?


−NH


−PO4


−Na


=O

Answers

Answer =o
I just looked it up

The functional group that defines a ketone is =O and the correct option is option 4.

What are Ketones?

Ketones are a common functional group in organic chemistry. Ketones have important physiological properties. As a result, they are a part of several sugars and compounds involved in medicinal use such as cortisone, an anti-inflammatory.

In ketones, the carbonyl group has 2 hydrocarbon groups attached to it. These can be either the ones containing benzene rings or alkyl groups. Ketone does not have a hydrogen atom attached to the carbonyl group.

Therefore, the functional group that defines a ketone is =O and the correct option is option 4.

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Help please thanks you

Answers

Explanation:

Ok so water is H2O and cabon dioxide in the air is CO2, so the water goes through the carbon dioxide and makes acid rain H2SO4.

Now we have our limestone which is CaCO3.

What happens is that the acid breaks apart our limestone into Ca2+ and CO3 2-. This then reforms into Calcium bicarbonate Ca(CO3)2.

Calcium bicarbonate is soluble in water and is hence washed away by the rain eroding the limestone.

Which term should replace the question mark?

Answers

Answer:

Can you explain a little bit more?

Explanation:

An independent country in which people share a common culture is called
an aristocracy.
an ethnic group.
a nation-state.
a polity.





PLease help

Answers

Answer is: a nation-state

Proof: Terms in this set (133) An independent country in which people share a common culture is called. A nation-state. The right to exercise supreme power and authority over a region, a group, or oneself. Sovereignty.

Describe the location of the shoulder blade to the collarbone.

Answers

The answer is a. Anterior.

What one advantage of owning a solar car ?

Answers

Answer:

You have no fuel cost and has low cost Maintenance

Explanation:

Find the molar mass of s6

Answers

Moles: 1

Weight, g : 192.3900

Answer:

Moles: 1

Weight, g : 192.3900

Explanation:

What is the best example of electromagnetic energy in everyday life

Answers

Electromagnetic Radiation. Do you listen to the radio, watch TV, or use a microwave oven? All these devices make use of electromagnetic waves. Radio waves, microwaves, visible light, and x rays are all examples of electromagnetic waves that differ from each other in wavelength.

Answer:best

Explanation:

Best

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