i need help with d and e

it should be 50/50 percent

so 50%

hopefully this is right !

Answer:

The water is clearly close to boiling temperature when you add the ice. So, initially the ice cools the water that is near it to near 0degC. Water between about 0 and 8 degrees is more dense than hotter water, so the cold water sinks to the bottom.Jun 14, 2020

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Answer:

hot water has more melting point

Explanation:

hot water has more melting point

hot water cpyld be boiled

Answer:

I think it's either A or D I'm not sure hope that I helped you.

Answer:

the law of conservation of energy states that energy neither created nor destroyed that means in a chemical reaction Mass reactants ( starting material)=tomass of produt

Answer:

c

Explanation:

trust me its reasonanle

Per cent composition of Magnesium (Mg) in Magnesium Phosphate compound ie [tex]Mg_3(PO_4)_2[/tex] is 27.74%. Hence, option C is correct.

Percent is from the Latin adverbial phrase per centum meaning “by the hundred.”

Determination of the percentage composition of Mg in Mg₃(PO₄)₂

Molar mass of Mg₃(PO₄)₂ = 262 g/mol

Mass of Mg in Mg₃(PO₄)₂ = 24×3 = 72 g

Percentage composition of Mg =?

[tex]Percentage = \frac{Mass \;of \;elements x 100}{Mass \;of \;compound}[/tex]

[tex]Percentage = \frac{72 X 100}{262}[/tex]

27.74%.

Hence, option C is correct.

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It's the eye because it's the organ of sight

Answer:

By using the techniques of archeology.

Explanation:

Students recover an individual's remains from a surface grave by using the techniques of archeology field to scrape away the layers of soil from that remains in a way that the remains can't be damaged. If they find the remains within 10 centimeters of digging, they can dig down further in order to dig out all the remains safely. The instruments of archeology field are used because they are light and can be used to dig out fossils of ancient organisms.

Answer:

the highest frequency

Explanation:

Answer: 102.56

Explanation: I just took the K12 test and this is my answer.

Answer:

Gas and Liquids

Explanation:

Answer:

See explanation

Explanation:

Oxygen has six electrons in its outermost shell. This means that its octet can be completed when it shares two electrons with another oxygen atom.

In a covalent bond, each bonding atom contributes one electron to the bond. This means that four electrons are shared between two oxygen atoms. Each atom contributes a total of two electrons which are shared. This molecule of oxygen satisfies the octet rule rather than a single atom of oxygen.

An image of the oxygen molecule is attached to this answer.

This system of two oxygen atoms joined together in a covalent bond is called an oxygen molecule(O2).

“Many of the objections are long standing but apparently unknown to many geophysicists, while some are peculiar to the new global tectonics. The conclusions drawn, in order of probability, are (1) the continents have almost certainly not moved with respect to each other; (2) convection is not active throughout the whole mantle; (3) even if convection is active in the upper mantle it cannot account for drift; (4) pole positions derived from paleomagnetism, and results of this method of investigation in its global form generally, are afflicted with an unknown cause of error and are in any case too inexact for drift reconstructions.”

(Wesson, 1972)

Answer:

chemical energy

Explanation:

just put that

Answer:

chemical energy

Explanation:

it is the light dependent reaction

Answer:

Atomic models are important because, they help us visualize the interior of atoms and molecules, and thereby predicting properties of matter.

Explanation:

We study the various atomic models in our course of study because, it is important for us to know, how did people come to the present concept of an atom. How did physics evolve from classical to quantum physics.

All these are important for us to know and thus, knowledge about various atomic models, their discoveries and drawbacks and finally improvements based on scientific evidence present at that time is important for us to understand the underlying theory very well.

Explanation:

A DAY IN THE LIFE OF METIS JOURNAL. I WROTE IT HOPE U LIKE IT XD

We, who live in the west, were Nomadic. So we always moved from place to place to hunt buffalo and other fur-bearing animals. And now again we have to shift everything we collected , like, all the essential needs we collected. It’s really hard to shift stuff, But when you move to a new place you get to see new beautiful places. They are just so satisfying to see! It’s like all my work(like the shifting work) is paid off. I love it! We always meet the Hudson’s bay company employees, and give them furs which we took from the bissons and other furry animals we hunted. And in exchange they give us their (Hudson’s Bay company) goods. Which is good! Because then we or I won't be able to enjoy that delicious pemmican!

 The one reason that makes me proud of my parents is that because of them I am like a translator for both sides in the fur trade! Anyways coming back to the present. As I said before, we were moving today to another place, But on the way some people along with my father will ride the famous York boats carrying supplies to fur posts. I begged my father to take me with him! And as usual he gave me some silly reason for me to stay. And now since I don’t have anything to do I will-..Nevermind, My mom’s calling me. Okay after helping my mom keep the fur posts into the York boats me , my mom, and the others are just relaxing and enjoying nature just to take a break. Since, I am so obsessed with my Journal notebook today I’m just going to sit here and right what comes to my mind. I’m not like the others who always seem to be talking with someone. I like my own space! 

I kind of miss my dad already, but he and his fellow members need to travel the waterways from the red river further west and north to hudson bay. These red river carts also travel the trek back and forth over land to St. Paul, Minnesota and to posts in saskatchewan.  Speaking about the red river, the only large settlement in the region is the red colony. About 12000 people lived in this colony around Fort Garry. Some were the original Selkirk settlers or their descendents. They had come from Scotland with lord Selkirk when he established the colony in 1811. Many of these original settlers were poor farmers who had been displaced  from their lands in scotland. They had endured many hardships in the early years of settlement, including foods, hunger, and sickness. I love studying about other colonies, cultures , history etc.

Answer:

Atomic size decreases on going along a period from left to right because the electron enters into the same shell, therefore, attraction between nucleus and outermost electron increases and thus atomic size decreases. Valency first increases from 1 to 4 and then decreases from 4 to GO along a period from left to right.

Answer:

kha gya vo chasmis ........

Answer:

2.77 atm

Explanation:

The total pressure of a mixture of gases is calculated as the addition of the partial pressures of the gases. In this case, the total pressure (Pt) is calculated from the partial pressures of helium (PHe), nitrogen (PN₂) and neon (PNe):

Pt = PHe + PN₂ + PNe

First, we have to convert the partial pressures to the same unit (atm). For this, we have to know that 1 atm=760 mmHg=760 Torr

PHe = 585 mmHg x 1 atm/760 mmHg = 0.77 atm

PN₂= 0.76 atm

PNe= 940 Torr x 1 atm/760 Torr = 1.24 atm

Finally, we calculate the total pressure in atm:

Pt = 0.77 atm + 0.76 atm + 1.24 atm= 2.77 atm

Answer:

All igneous rocks the basis of the rock cycle are formed by plate tectonics. ... The heat from the mantle that fuels plate tectonics causes both igneous and sedimentary rocks to be turned into metamorphic rocks. The metamorphic rocks can be eroded into sedimentary rocks are remelted back into igneous.

Explanation:

Answer:

The law of floatation is applied in all vessels which travel by waterways that include ships, submarines and ferry boats. It is also applied in some vessels which travel by air ways such as hot air balloon and air ship. Balloons of different colors and shapes are filled with lighter gas so that will float in air.

Answer:

*hot air balloon

*swimming

Explanation:

sna makatulong po:)

Answer:

why would u want 2?

Explain in the comments why.

Answer:

No, I don't think so at least

Explanation:

In chemistry, you do calculations to find the concentration of a solution with another solution of KNOWN concentration. Without concentrations of either solution, were would you get values from? Where would you start? :3

You can not titrate  a solution of unknown concentration with another solution of unknown concentration and still get a meaningful answer.

Titration involves the standardization of unknown solution using a standard solution. By this definition, titration must involve a standard solution.

Since the two unknown solutions are not standardized, we can never get a meaningful answer because we can not be able to perform any calculation unless we have a standard solution.

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Answer:

An Arrhenius acid is a substance that associates in water to form hydrogen irons (H+) In other words an acid increases the concentration of H+ ions in an aqueous solution

Answer:

personally I think it's a but it could also be D.

But yeah personally I would say A

Answer:

[tex]MgCl_{2} O_{4}[/tex]

Explanation:

When calculating an empirical formula from percentages, assume you have a 100g sample. This allows you to convert the percentages directly to grams, because X % of 100g is X grams.

So:

15.3 % = 15.3g Mg, 44.5% = 44.5g Cl, 40.2% = 40.2g O

The next step is to divide each mass by their molar mass to convert your grams to moles.

15.3/24.3 = .630 mol

44.5/35.5 = 1.25 mol

40.2/16.0 = 2.5 mol

Then you will divide all of your mol values by the SMALLEST number of moles. This gives you whole numbers that are the mole ratio (subscripts) of the empirical formula.

.630 mol/.630mol = 1

1.25 mol/.630mol = 2

2.5 mol/.630mol = 4

So the empirical formula is

[tex]MgCl_{2} O_{4}[/tex]

Answer:

Cows and other ruminant animals (like goats and sheep) emit methane, a potent greenhouse gas, as they digest grasses and plants. This process is called “enteric fermentation,” and it's the origin of cows' burps.

Explanation:

Answer:

Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything.