Chemistry High School

Please do the worksheet

Please Do The Worksheet
Please Do The Worksheet

Answers

Answer 1
i hope someone answers for you

Related Questions

Given the following equation:
2KMnO4 → K2MnO4 + MnO2 + O2
How many grams of KMnO4 are required to produce
1.60 grams of O2?
g

Answers

Mass of KMnO4 required : 31.607 g

Further explanation

The reaction equation is the chemical formula of reagents and product substances  

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products  

Reaction

2KMnO₄ → K₂MnO₄ + MnO₂ + O₂

mol of O₂ :

[tex]\tt \dfrac{1.6}{16}=0.1[/tex]

mol ratio KMnO₄ : O₂ = 2 : 1

mol of KMnO₄ :

[tex]\tt \dfrac{2}{1}\times 0.1=0.2[/tex]

mass of KMnO₄ :

MW KMnO₄ : 158,034 g/mol

[tex]\tt mass=0.2\times 158,034 =31.607~g[/tex]

The table below lists the properties of a metallic element.

shiny, silver colored, forms +1 and +2 ions, compound with sulfur is bright red.

Where on the periodic table would this element most likely be found?

Group 1
Group 2
Group 12
Group 13

Answers

Answer:

Group 12

Explanation:

Answer:

I got all answers correct on my test and got 100%, this question was in the test which got correct

so your answer is group 12

Explanation:

balance this chemical equation pleaseee

Answers

Pb(NO3)2 + 2NaCl > 2NaNO3 + PbCl2

What type of reaction is illustrated?

Answers

combustion reaction

describe how electricity moves through wires

Answers

The particles that carry charge through wires in a circuit are mobile electrons. The electric field direction within a circuit is by definition the direction that positive test charges are pushed. Thus, these negatively charged electrons move in the direction opposite the electric field.

An element found in groups 3-12 of the periodic table is classified as a[n]

Answers

Answer:

Transition Metals

Explanation:

Hope this helped :)

What is the formal charge of carbon in CO?

|C≡O|​

Answers

Answer:

FC of C = -1

General Formulas and Concepts:

Lewis Dot StructuresResonance StructuresFormal Charge: FC = # of valence e⁻ - # of lone e⁻ - # of bonds

Explanation:

Step 1: Define

Carbon (C)

4 valence e⁻2 lone e⁻3 bonds

Oxygen (O)

6 valence e⁻2 lone e⁻3 bonds

Step 2: FC of C

Substitute:                    FC = 4e⁻ - 2e⁻ - 3Subtract:                       FC = -1

Which best describes what is occurring when a door is almost closed and rays of light fan out from the small opening? absorption interference refraction diffraction

Answers

Answer:

The correct answer is Option D (diffraction).

Explanation:

Diffraction has been known as a mechanism through which light rays divide across clusters of darkness and light rather than into the colors of the rainbow. That is the twisting of such an obstacle across the sun. In this case, the challenge has been the door from which the illumination moves and bends.

Other alternatives are not relevant to the specified case. So, the alternative above would be appropriate.

Answer: D

Diffraction

Explanation:

E D G E 2 0 2 0

If an element is on the 4th row of the periodic table...how many energy levels/rings would you need to draw a Bohr 's model of the element's atom?

Answers

Answer:

4 energy levels/rings

Explanation:

By the atomic model proposed by Niels Bohr, the electrons orbit around the nucleus in shells having different energy level each with the ability to contain a given maximum amount of electrons.

The closest shell to the nucleus named the K shell, can have a maximum of two electrons, the next shell known as the L shell can have 8 electrons while the next shell, M, can have a maximum of 18 electrons

The arrangement of the periodic table is based on the number and location of electrons such that elements in the 4th row (period 4 elements) have three completed energy levels/rings before, their valence ring making the total number of rings = 4 energy levels/rings.

Which solution has the greatest number of hydroxide ions?



i need a friend....

Answers

Answer:

homogeneous solutions

The answer is homogeneous solutions


How many moles of Mg2+
are in 6.4 X1022 ions?

Answers

Answer:

0.11 moles

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{6.4 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.10631229...[/tex]

We have the final answer as

0.11 moles

Hope this helps you

What is the volume of 89.6 moles of gas at STP *

Answers

Volume = 89.6 x 22.4 = 2,007.04L

The ionization energies for removing successive electrons from sodium are 496 kJ/mol, 4562 kJ/mol,
6912 kJ/mol, and 9544 kJ/mol. The great jump in ionization energy after the first electron is removed
indicates that
Select one:
O a. sodium has four or five electrons.
O b. the atomic radius has increased.
c. a d-electron has been removed.
d. the noble gas configuration has been reached.

Answers

Answer:

D

Explanation:

The high jump of ionization energy indicates that we are trying to remove electron from noble gas configuration state.

The ionization energy data specifies that the Elements are from group 1 at period 3 or greater.

Removing the first electron require 496 kJ and the second ionization energy jump significantly due to the removal of electron from the noble gas configuration which is logical because electron try to maintain the especially stable state.

What is the mass of 1.34x10^24molecules of Iron? *

Answers

Answer:

Ion channel proteins allow ions to diffuse across the membrane. A gated channel protein is a transport protein that opens a "gate," allowing a molecule to pass through the membrane

Explanation:

GUYS I NEED THIS ASAP ​

Answers

It’s DEFINITELY 2 like DEFINITELY

13
0121
This question is about sodium and chlorine.
FIGURE 2 shows the positions of sodium and
chlorine in the periodic table.
FIGURE 2
CI
Na
02
State ONE difference and ONE similarity in t
electronic structure of sodium and of chlori
[2 marks]

Answers

The question is asking you to compare each elements electrons, specifically valence since it mentioned their placement on the table.

Similarly: they both are only one electron away from stability (a full octet)

Difference: Sodium will want to loose the one electron, and Chlorine will take it.

A boat sails into a bay and drops anchor. Several hours later, it is surrounded by mud. What
happened?

Answers

Answer:

the flow of the water pushed the mud around the anchor

Explanation:

The information regarding the mud should be explained below:

The following information should be considered:

In the case when it should be surronded by mud so there is low tide arise.it is occur at the time when the water retreats to its lowest level, moving away from the shore.

Learn more: https://brainly.com/question/5763151?referrer=searchResults

For each successive electron removed from an atom, the ionization energy
Select one:
a. increases.
b. decreases.
C. remains the same.
d. shows no pattern.

Answers

the answer is:

a. increases

a. increases.

Ionization energy:

The amount of energy required to remove an electron from an isolated atom or molecule.

→ Trend for Ionization energy:

First ionization energy generally increases as you move left to right across a period. This is due to increasing nuclear charge, which results in the outermost electron being more strongly bound to the nucleus.First ionization energy generally decreases as you move down a group. This is because the outermost electron is, on average, farther from the nucleus, meaning it is held less tightly and requires less energy to remove.

Thus, for each successive electron removed from an atom, the ionization energy increases.

Learn more:

brainly.com/question/10545417

Name two or more body systems that work together.

Describe how they work together.

Answers

Answer:

All of your body systems have to work together to keep you healthy. Your bones and muscles work together to support and move your body. Your respiratory system takes in oxygen from the air

Explanation:

what is the most reactive metal in Period 4 of the periodic table?

Answers

According to the electronic configuration, the most reactive metal in Period 4 of the periodic table is potassium.

What is electronic configuration?

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

Learn more about electronic configuration,here:

https://brainly.com/question/29757010

#SPJ6

I have a quick question how do I balance these chemical equations

VbO + E2O → Vb(OE)2
YG + T3N → TG + Y3N
Tu + JgMO3 → Tu(MO3)2 + Jg
XfRf2 + Re2 → XfRf3

Answers

1. Already balanced I believe
2. 3YG+T3N=(TG)3+Y3N
3.Tu+(JgMO3)2=Tu(MO3)2+2Jg
4. Unsure

What can you make with molecules

Answers

Answer:

water

Explanation:

Answer:

Explanation: Las moléculas se encuentran fuertemente enlazadas con la finalidad de formar materia. Las moléculas están formadas por átomos unidos por medio de enlaces químicos.

Listening is a more complex process than hearing.

Answers

Arent listening and hearing and listening the same thing.

A wooden block has a mass of 562 g and a volume of 72 cm3. What is the density rounded to the nearest tenth!

Answers

Answer:

The answer is 7.81 g/cm³

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question we have

[tex]density = \frac{562}{72} \\ = 7.80555555...[/tex]

We have the final answer as

7.81 g/cm³

Hope this helps you

Answer:

r

Explanation:

A 20.0g sample of metal with a specific heat of 5 J/(g°C) raised it's initial temperature to 40.0 when 500J heat was added. What was the initial temperature of the metal?

Answers

The initial temperature of the metal = 35 °C

Further explanation

Heat can be formulated :

Q = m . c . ΔT

Q = heat, J

c = specific heat, J/g C

ΔT = temperature, °C

m = 20 g

c = 5 J/(g°C)

Q = 500 J

T₁ = 40 C

the initial temperature :

[tex]\tt \Delta t(T_2-T_1)=\dfrac{Q}{m.c}\\\\40-T_1=\dfrac{500}{20.5}\\\\40-T_1=5\\\\T_1=35^oC[/tex]

Four students are carrying out different laboratory procedures. Piroja is mixing baking soda and vinegar to see if it reacts. Jason is heating salt water over a burner until the water evaporates. Kali is putting crushed ice and ice cubes on a table to see which melts first. Francisco is separating iron filings from sand using a magnet. Which experiment relies on convection? Piroja’s experiment Jason’s experiment Kali’s experiment Francisco’s experiment

Answers

Answer: Jason experiment

Explanation:

I just took the test

Answer: Jason's Experiment

How do the alveoli in the lungs move oxygen and nutrients into the bloodstream? 1.Gravity 4.Time 2.Diffusion 5.Pressure 3.Magnetic force

Answers

Answer:

2.Diffusion

Explanation:

As we metabolize certain nutrients for the correct functioning of our cells, carbon dioxide is produced as a result. We need oxygen in order to metabolize them, so we need to have a system to incorporate it, and to eliminate the carbon dioxide produced.

This system is provided by the interaction between the respiratory system, which allows the enter of oxygen into the body and gets rid of the carbon dioxide, and the circulatory system, which acts transporting carbon dioxide and oxygen to and from the lungs, respectively.

The surface available for the gaseous exchange is enlarged by the pulmonary alveoli. The alveoli are the terminal aerial spaces of the respiratory system and the structures where the exchange between the air and blood is produced. Each alveolus is surrounded by a net of capillaries, where oxygen is freed from the hemoglobin and moves into the cells by diffusion. Carbon dioxide, diffuses out of the cells into the capillaries, where most of it dissolves in the plasma of the blood.

give 7 and example of how each wave in the EM spectrum in used in our daily lives

Answers

1. it’s use for our food in like microwaves and ovens
2. airplanes are guided by radar waves,
3.the tv is used by electromagnetic waves
4. they are used in heaters,
5.infrared cameras which detect people in the dark
6.Allows airport security to observe the internal contents of objects and luggage using airport scanners
7.doctors use electromagnetic waves in x-rays

Rock salt mixed with ice actually lowers the temperature of the salt/ice mix. Physical or chemical property?

Answers

Answer:

chemical

Explanation:

Salt changes the chemical makeup of the water and allows it to get colder than what it would normally freeze at.

For every action, there is an equal and opposite reaction.

Does the statement describe a scientific law?

Answers

Answer:

yeah its newton's third law

Explanation:

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Classify each number below as an integer or not. Gamma rays are given out from theof radioactive atoms. What one word completes the sentence?? Write for 5 minutes about one thing for which you are thankful. Explain the Black Bean Incident. Who was involved and why? What was the outcome? Chief Executive role for the president's job what is it? HELP WILL GIVE BRAINEST AND 20 POINTS!!! WHY IS KAMALA HARRIS BECOMING VICE PRESIDENT A HOT TOPIC OR TRENDING?? GIVE ABOUT 4-5 SENTENCES EXPLAINING WHY AND PLEASE MAKE IT GOOD Find the value of c that completes the squarex^2-16x+cPlease help me with how to do this, and show me. Thank you. In which system of government are leaders most accountable to citizens? what two trends in the 1990's were changes implemented by us business Which of the following geographical features acted as a natural defense for Egypt against enemies from the south? A. the Nubian desert B. the Mediterranean Sea C. the cataracts of the Nile D. the black silt on the river banks Please select the best answer from the choices provided A B C D HURRYYYYPeople in this stage can sometimes have midlife transitions/crisis or empty nest syndrome. In the ____ and ____ stages of product life cycle, firms often set priorities on growth and/or market share Is this cute()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()() A car is sold for $18,000. After one year, the value of the car is $9,900. Write an exponential function y to determine the value ofthe car after x years if the rate of decrease is the same each year.y =Estimate the value of the car after 6 years. Round the answer to the nearest dollar. In The Lightning thief chapter 12, how did percy defeat medusa What salient feature of the video presentation has caught your interest and why? Which statement best describes how the Grange tried to help farmers financially in the late 1800s? 3(x+5)-10 = -2(x+10) What is the sum of all integers that are multiples of 4 from 1 to 150? *Show your solution* Compare how the nervous system and endocrine system work to send messages through the human body.