Chemistry High School

helpppp plzzzzzz it's due Monday :(



A) B) C) D) E) F) G)
H) I) J) K) L) M) N)


O) P) I need to identify whether they are compounds, elements, mixtures, a mixture of compounds, a mixture of elements, or a mixture of compounds & elements

Helpppp Plzzzzzz It's Due Monday :(A) B) C) D) E) F) G)H) I) J) K) L) M) N) O) P) I Need To Identify

Answers

Answer 1

Answer:  but thx for the points

Explanation:

Related Questions

Given 7.3 moles of Ethane Gas (C2H6) and Excess Oxygen, how many moles of CO2 would be produced in the following combustion reaction? Round to 1 decimal place. Assume 1 Mole Ethane = 30.07 g of Ethane

2C2H6 + 7O2 --> 4CO2 + 6H2O

Answers

Answer:

Explanation: Find moles of product formed when C2H6 is burned in excess oxygen? Mass percent of ethane in a mixture before it goes through combustion with propane. Combust to create water and co2. Using gas stoichiometry find the volume of sulfur burned in excess of oxygen: Gas pressure inside a vessel: 1.60 grams of methane (CH4) is combusted.



NaNO3 ———> **heat above the arrow**
NaNO2 + O2
1. What kind of reaction is the one above? *
O A. Single replacement
O B. Double replacement
O C. Composition aka synthesis
O D. Decomposition
O E. Organic combustion

Answers

Answer:

D (Decomposition)

Explanation:

This reaction is a decomposition reaction because one substance (NaNO3) is being separated into two substances (NaNO2 and O2). Alternatively, you could use the process of elimination. The reaction can't be single/double replacement because there's only one reactant, it can't be synthesis because substances are being broken down, not formed, and it can't be combustion because O2 is a product, not a reactant, and CO2 and H2O aren't being produced, as is common with combustion reactions.

Which of the following is a molecular compound?
F) NO2
G) Ca(NO3)2
H) H2SO4
J) NaOH

Answers

Answer: H

Explanation:

The answer is G my guy

Use the bond dissociation energies of H2 (435 kJ/mol) and of a typical carbon–carbon bond (347 kJ/mol) to decide which bond is stronger. Explain your reasoning.

Answers

Answer:

H2 bond is stronger

Explanation:

In this question, we are trying to make a connection between bond dissociation energy and the strength of a bond.

First of all, we must know that any bond that is quite stable must have a large bond dissociation energy. This means that more energy is supplied in order to cleave the bond.

A high bond dissociation energy actually implies that a bond is of low energy and consequently stable.

2. How do we find the number of neutrons in an atom?
(10 Points)
a. Add the protons and electrons
b. Subtract the protons from the electrons
c. Subtract the atomic number from the atomic mass
d. Subtract the atomic mass for the atomic number

Answers

Answer:

For all atoms with no charge, the number of electrons is equal to the number of protons. The mass number, 40, is the sum of the protons and the neutrons. To find the number of neutrons, subtract the number of protons from the mass number.

Explanation:

Answer:

Letter C. Subtract the atomic number from the atomic mass


How many moles of helium are contained in 9.85 x 1023 atoms?
9.85 x 1023 atoms

Answers

Answer:

10076.55

Explanation:

Explain why reactivity increases by linking increase in atomic number, number of shells with the shielding of outer most electron

Answers

the higher the atomic number, the more shells an atom has. the electrons in the outer shell are more reactive as they have a weaker attraction to the nucleus as they are furthest away from the nucleus.

How plants adapt to temperature variation

Answers

Answer: One major strategy by which plants adapt to temperature change is to decrease the degree of unsaturation of membrane lipids under high temperature and increase it under low temperature. ... This pattern of changes in membrane lipids was distinct from that occurring during slow alterations in temperature.

Explanation: I found this answer from goggle

Solve you will get brainliest and23 points

Answers

It’s the second one if you need more help tell me
Yes it is the second one

Sodium chloride is dissolved in water.
Which ions are present in the electrolyte?

Answers

It is the polar nature of water that allows ionic compounds to dissolve in it. In the case of sodium chloride (NaCl) for example, the positive sodium ions (Na+) are attracted to the negative pole of the water molecule, while the negative chloride ions (Cl−) are attracted to the positive pole of the water molecule.

Answer:

Na+

Cl-

H+

OH-

Explanation:

NaCl + H2O -----> Na+. Cl- + H+ OH-

PLEASE ASAP
HELP!!!!!!!!

Answers

Answer:

sec    explanation:    It is because it goes by order sec, min, day, month, and year etc

Answer:

sec

Explanation:

if you have 3 dozen pennies how many ml of water would they displace

Answers

The mass of the displaced fluid can be expressed in terms of the density and its volume, m = ρV. The fluid displaced has a weight W = mg, where g is acceleration due to gravity. Therefore, the weight of the displaced fluid can be expressed as W = ρVg.

Determine the molecular shape of each compound based on their Lewis structures. NO2 bent linear trigonal planar​

Answers

Answer:

Bent

Explanation

Ed

Answer:

ANSWER- C: tetrahedral

Determine the molecular shape of each compound based on their Lewis structures.

CH2Cl2

bent

linear

tetrahedral

Explanation:

hope this helped :)

6CO2 + 6H2O → C6H12O6 + 602

How many molecules of CO2 are present

Answers

Answer:

12 hydrogen + 12 hydrogen = 24 hydrogen

Hydrogen was transferred from sugar and water on the left to water on the right releasing

Explanation:

On the left side are 6 CO₂ molecules, or carbon dioxide. On the right, there are no CO₂ molecules, so in the entire equation, there are only 6 CO₂ molecules

Can someone help?
Apparently you couldn’t see the picture in the previous question. Hopefully it will now.

Answers

Answer:

ummm sugar is the answer ;-;

What do most of the plants photosynthesis occurs in ?

Answers

It occurs inside the chloroplast. Please brainiest me! :)

The visible light is a short segment of the electromagnetic spectrum.

Yes or No​

Answers

Answer:

Yes

Explanation:

The visible light spectrum is the segment of the electromagnetic spectrum that the human eye can view.

which statement accurately describe stars​

Answers

stars are made of gas & star color is related to temperature

someone help pls :,)

Answers

Answer:D

Explanation:

Cause I literally just did this

Ionic compound is NaOH do letter D should be correct.

CH4 + 202 → CO2 + 2H2O
How many grams of O2 needed to produce 36 grams of H2O?

Answers

Answer:

Mass = 64 g

Explanation:

Given data:

Mass of water produced = 36 g

Mass of oxygen needed = ?

Solution:

Chemical equation:

CH₄ + 2O₂       CO₂ + 2H₂O

Number of moles of water produced:

Number of moles = mass/molar mass

Number of moles = 36 g/ 18 g/mol

Number of moles = 2 mol

Now we will compare the moles of water and oxygen.

             H₂O       :          O₂

                2         :           2

Mass of oxygen:

Mass = number of moles × molar mass

Mass =  2 mol × 32 g/mol

Mass = 64 g

What is wrong with writing the electron configuration of a ground state atom as 1s2 2s2 2p6 3s2 3p6 4s2 4d1?

Answers

Answer:

4d - orbital makes the given electronic configuration wrong.

Explanation:

The order of electronic configuration is written as;

1s²

2s²      2p⁶

3s²      3p⁶      3d¹⁰

4s²      4p⁶      4d¹⁰        4f¹⁴

5s²      5p⁶      5d¹⁰        5f¹⁴

6s²      6p⁶      6d¹⁰        6f¹⁴

7s²      7p⁶       7d¹⁰        7f¹⁴

In order of energy level from the lowest to the highest, the configuration of the given atom in ground state can be written as;

1s²    2s²   2p⁶   3s²   3p⁶   4s²  3d¹, when compared to the given configuration, 4d orbital makes the given configuration wrong, because the next orbital after 4s is 3d.

You’ll get marked as brainlist I think because that’s what happened last time (:

Answers

Answer:

both are physical, caused by heating

Explanation:

why do iron and nickel form a metallic bond

Answers

It was made from the same material?

A student has three solid samples: one compound with covalent bonds, one compound with ionic bonds, and one compound with metallic bonds. The sample with metallic bonds is mostly likely to have which characteristic?

Answers

Answer: Hmm.. i'll try to figure it out hang on..

Explanation:

Bonding Story Mini Project

You can choose to show ​ionic bonding, covalent bonding (polar or nonpolar), or both​, but your story must do the following:
1. Explain the type or types of bonding you are showing - this does not need to be explicit, but it needs to be somehow worked into the story.
2. Show at least 2 different bonds forming (e.g. 2 different compounds)
3. Show the valence electrons of the atoms and how they meet the octet rule

Answers

there needs to be the story so that i can work with the 1st question

Please help me in Q3 it’s not understandable to me

Answers

Answer:

A- mixture

B- element

C- compound

Explanation:

A mixture is composed of two or more substances. Since it is not entirely homogeneous throughout, then it can not melt or boil at a fixed temperature.

An element is any substance that cannot be decomposed into simpler substances by ordinary chemical processes. This describes substance B.

A pure chemical element has a fixed melting and boiling point.

A compound is composed of one or more chemical elements. A compound may be broken down into its components by certain processes.

PLEASE HELP! this is a science test/quiz I’m pretty sure the answers are on the bottom if not please comment so I can tell you them

Answers

ITS NOT LETTING ME PUT THR ANSWER

Zachary adds 9.7 g to 1.114 g.
How many significant figures should his answer have?

Answers

Always use least amount of sig figs possible. So this 9.7 would be (answer): 2 sig figs

What are protons, neutrons, and electrons made of?

Answers

Answer:

quarks and gluons

I think it’s gluons but I’m not sure

What is the number after an element in a chemical equation called? Example: H2
a. subscript
b. coefficient
c. atom
d. equation

Answers

Answer:

the answer to your problem is A.Subscript...BRAINLIEST

Other Questions
A student, Ken, is given a mixture containing two carbonate compounds . The mixture includes MgCO3 and (NH4)2CO3 . The mixture is 64.16% CO3 is by mass. What is the mass percent of MgCO3 in the mixture? Suppose the fishing spot where kimi Werner goes spear fishing has an area of 946 square yards .If the fishing spot is 43 yards long, how wide is the fishing spot can you help me please i need help please? and im timed PLZ HELP want to know if its right How many grams are presented in a 7.4 moles sample of H2O? 32a + 28 = factor completely help please! its due in a few Read the passage below carefully and then choose the correct answer.Knew you not Pompey? Many a time and oftHave you climb'd up to walls and battlements,To towers and windows, yea, to chimney-tops,Your infants in your arms, and there have satThe livelong day, with patient expectation,To see great Pompey pass the streets of Rome:And when you saw his chariot but appear,Have you not made an universal shout,That TIBER trembled underneath her banks,To hear the replication of your soundsMade in her concave shores?The word TIBER refers toA.) A pauseB.) A riverC.) A generalD.) An echo Heredity isa. passing traits from one generation to the nextb. the likelihood that an individual will contract a diseasethe optimal health a person can achieved. all of the aboveC. Select the number that would make this statement true: 719.3 ________ = 7.193 1 10 100 1,000 factor the equation in the picture Could somebody answer these for me please? i will give brainlyest!!!!!!! Why did Quanah Parker and his fighters lose so many men to so few hunters in the attack on Adobe Walls? The government has lowered taxes on cattle ranchers. The determinant of supply for beef is __________ , and the supply curve will shift to the ______________________ . other goods ; left technology ; rightsubsidies and taxes ; right subsidies and taxes ; left Which part of DNA determines the traits of an organism?A. The specific sequence of the nitrogenous basesB. The hydrogen bonds holding the double helix togetherC. The amount of adenine, guanine, cytosine, and thymineD. The number of sugars in the backbone of the double helix What is the percent decrease from 376 to 0. Samir fills a different bag with 40kg of bananas. He then puts some pears in the same bag. The total weight of the bag is now 102 pounds. What is the weight of the pears that he has brought. 1kg=2.2 pounds The Rule of 10 states that as little as ________ % of the energy at any trophic level is transferred to the next trophic level. If I am a higher trophic level organism, this means that I need to eat MORE / LESS (circle one) food in order to fulfill my energy needs. The majority of the energy is lost as ________________ through the completion of metabolic processes. Estimate the solution of the system of equations