Chemistry High School

pls help with this !!!!!!

Answers

Answer 1

Answer:

thank you for the update on

Answer 2

Answer:

es la dos

Explanation:

Related Questions

when washing tableware the water temperature should be:

Answers

When washing tableweare the water temperature should be warm

1.5 of potassium ioxcide in 150cm^3 of solution

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Answer:

Explanation:

I'm not sure what is being asked, not the units of "1.5." I don't know of potassium "ioxicide." Was "dioxide" intended?

I'll assume the question is "What is the concentration, in Molar, of 1.5g of potassium dioxide in 150cm^3 of water (150cm^3 is 150 ml).

The molar mass of K2O, potassium dioxide, is 94.2 g/mole. 1.5g is (1.5g/94.2 g/mole) or 0.0159 moles of K2O. The definition of Molar is moles/liter. So take the moles of K2O and divide by the liters, which is 0.150L in this case.

(0.0159 moles K2)/0.150 L = 0.106 M K2O

Can matter be created or
destroyed?

Yes or No

Answers

Answer:

Explanation:

The same amount of matter is present before and after chemical and physical changes. Matter cannot be created or destroyed

Answer:

none is created or destroyed. This concept is called the Law of Conservation of Mass.

the mixing of which pair of reactants will result in a precipitation reaction?

Answers

Answer:

NH4Br and NH4I are both soluble in water, and they don't react with each other. So this pair will not form precipitation.

NaClO4 and (NH4)2S are both soluble in water. While in water, they dissociate into Na+, ClO4-, NH4+ and S2- ions, which don't react with each other. So this pair will not form precipitation.

Ni(NO3)2 and Na2CO3 are both soluble in water. When the 2 solutions combine, NiCO3 forms. NiCO3 is not soluble in water, so it will precipitate out from the solution. This pair will result in precipitation.

K2SO4 and Cu(NO3)2 are both soluble in water. While in water, they dissociate into K+, SO42-, Cu2+ and NO3- ions, which don't react with each other. So this pair will not form precipitation.

Explanation:

Hope this helps...

12. A beginner's bowling ball has a mass of 4.9 kg and a volume of 5.4 liters. Will it float in water,
which has a density of 1.0 g/mL?

Answers

Taking into account the definition of density and Archimedes' principle, the beginner bowling ball will float on the water.

But first it is neccesary to know that density is a quantity referred to the amount of mass in a certain volume of a substance or a solid object.

In other words, the density is the relationship between the weight (mass) of a substance and the volume that the same substance occupies.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

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

In this case, a beginner's bowling ball has a mass of 4.9 kg and a volume of 5.4 liters. This is:

mass= 4.9 kg= 4900 g (being 1 kg= 1000 kg)volume= 5.4 L= 5400 mL (being 1L=1000 mL)

Replacing in the definition of density:

[tex]density=\frac{4900 g}{5400 mL}[/tex]

Solving:

density=0.907 [tex]\frac{g}{mL}[/tex]

On the other hand, Archimedes' principle says that an object immersed in a liquid experiences an upward vertical force equal to the weight of the volume of the dislodged liquid.

The sinking or floating of an object is determined by its density with respect to that of the liquid in which it is submerged.

Considering water as the liquid where the object is submerged in this case, an object with a higher density than water will sink. In contrast, an object with a lower density than water will float.

In this case, considering that water has a density of 1 [tex]\frac{g}{mL}[/tex], the bowling ball for beginners has a lower density. This indicates that, having a lower density than water, the object will float.

In summary, the beginner bowling ball will float on the water.

Learn more about density:

brainly.com/question/952755?referrer=searchResults brainly.com/question/1462554?referrer=searchResults

What law states that matter cannot be created nor
destroyed, even in a chemical reaction?
A
Newton's Laws of Motion
B
Law of Conservation of Mass

Answers

Answer:

I believe it would be Law of conservation of mass (sorry if I'm incorrect)

Can u please help me on this question, first person to answer will be marked brainlist

Put the words in order like 1 something 2 something 3 something or whatever u think is the best way to answer this question for me

Answers

Answer:

1.이산화탄소

2.낮은

3.높은

4.쓰레기

5.빠른

6.산소

7입자

Explanation:

내가 틀렸다면 나를 수정하는 데 도움이되기를 바랍니다.

electronegativities of the elements be, mg, ca, and sr follow a specific trend within their group. based on this trend, the atoms of which element will have the least attraction for an electron?

Answers

Based on the trend of electronegativities values of the elements Be, Mg, Ca, and, Sr within their group (increasing from bottom to top), the atoms of the element Sr will have the least attraction for an electron.

We need to remember that electronegativity indicates the affinity or attraction of an element for an electron. Hence, the higher the electronegativity, the higher the attraction of that element for an electron.

The values of electronegativities of the given elements are the following:

Be = 1.57

Mg = 1.31

Ca = 1.0

Sr = 0.95

We can see that the increasing trend of electronegativities in this group is from the bottom to the top, having the Sr with the lowest electronegativity value and the Be with the highest.

This trend is related to atomic size, the larger the atomic size, the lower the electronegativity because the electron in the outermost shell will feel less attraction towards the nucleus of an atom. In a group of the periodic table, the size of an atom will increase from top to bottom.

Therefore, according to the said above, the atoms of the Sr will have the least attraction for an electron (it has the lower electronegativity value).

Find more about electronegativity here:

https://brainly.com/question/2060520?referrer=searchResults https://brainly.com/question/24370175?referrer=searchResults

I hope it helps you!

"type one to two paragraphs describing the changes in potential and kinetic energy of the cart.
Be sure to discuss how the potential and kinetic energy of the cart changes at each of the four
positions along the track, and explain why these changes occur."

Click the links to open the resources below. These resources will help you complete the assignment. Once you have created your file(s) and are ready to upload your assignment, click the Add Files button below and select each file from your desktop or network folder. Upload each file separately.

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The cart starts out in position A with high potential energy, low kinetic energy, and some thermal energy. As the cart progresses into position B, the kinetic energy begins to increase and the potential energy begins to decrease; as the thermal energy increases as thermal energy from the track is transferred to the cart through friction. Once the cart reaches position C, it has high kinetic energy, low potential energy, and some thermal energy. At position D, the cart has high potential energy, low kinetic energy, and some thermal energy. The potential energy throughout is correlated to gravity, the kinetic energy is correlated to momentum, and the thermal energy is correlated to friction. The potential energy is at its maximum during position A, and its minimum at position C; the kinetic energy is at its maximum during position C, and its minimum at position A; the thermal energy is at its maximum during position B, and its minimum at position A

convert using metric and U.S. conversion factor. Convert 0.672 ft to mm

Answers

The Malcontents' major complaints were that the Trustees had placed too many limitations on the ownership of land, the right to make and to buy alcohol, and the right to own slaves.

Answer:

204.8256

Explanation:

PLEASE HELPP!
True or False: Hydrogen is an alkali metal.

Answers

False most likely hydrogen is a type of gas so it might be false

Answer: falso

Explanation:

If an atom has four electrons in the outer energy level, how will it form a bond?
A. It will gain electrons.
B. It will share electrons.
C. It will not form a bond.
D. It will lose electrons.

Answers

Answer:

b . Thunder formed between carbon atoms and other elements because carbon has four valence electrons it made take for Coral Bell and funds to obtain a complete outer energy level.

WWE Roman reigns vs john cena summerslam 2021 who won?

Answers

Answer:Reigns then hit two Superman punches and a spear to score the pinfall. Result: Roman Reigns defeated John Cena via pinfall to retain the title.

Explanation:

Answer: Roman Reigns I hope this helps

Explanation:

Answers

Answer:

1. four in the first energy level, four in the second energy level

2. eight in the first energy level, zero in the second energy level

3. zero in the first energy level, eight in the second energy level

4. two in the first energy level, six in the second energy level *

Explanation:

1. four in the first energy level, four in the second energy level

Answer:

I know someone that has the answer

Explanation:

I know someone that has the answer

Explain what a product is

Answers

Answer:

an article or substance that is manufactured or refined for sale. or a thing or person that is the result of an action or process.

Explanation:

Answer:

product is the item offered for sale. A product can be a service or an item. It can be physical or in virtual or cyber form. Every product is made at a cost and each is sold at a price. The price that can be charged depends on the market, the quality, the marketing and the segment that is targeted.

what is the molar mass of dimethylglyoxime, c4h8n2o2?

Answers

Answer: 116.12 g/mol

Explanation:

The molar mass of a compound can be calculated by finding the molar of the individual atoms that combine to make the compound.

Molar mass of compound =

∑ (molar mass of element × number of atoms of the element)

∴ Molar mass of dimethylglyoxime

= 4C + 8H + 2N + 2O

= [(4 × 12.011) + (8 × 1.0080) + (2 × 14.007) + (2 × 15.999)] g/mol

= 116.12 g/mol

∴ the molar mass of dimethylglyoxime = 116.12 g/mol

Think of a time you might have used the scientific method without even realizing it.

Answers

Answer:

when i exist

Explanation:

Someone pls help me I will make you brain

Answers

Answer:

I think it's true

Anyone help me answer this please anyone

Answers

Answer:

[tex]\huge\boxed{\sf Q = 5880\ Joules}[/tex]

Explanation:

Given:

m = mass = 40 g = 0.04 kg

c = specific heat constant of water = 4200 J/Kg°C

ΔT = change in temperature = T2-T1 = 60 °C - 25 °C = 35°C

Required:

Q = change in heat energy = ?

Formula:

Q = mcΔT

Solution:

Q = (0.04)(4200)(35)

Q = 5880 Joules

[tex]\rule[225]{225}{2}[/tex]

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