Can someone help me with this please

Explanation:

1397.4 uranium atoms......

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 4.42g of aluminum must react with 100 g of copper (ii) phosphate.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

mole =given mass ÷ molar mass

2 Al + 3 Cu[tex]_3[/tex](PO[tex]_4[/tex])[tex]_2[/tex] → Al[tex]_2[/tex] (PO[tex]_4[/tex])[tex]_3[/tex]+ 3 Cu

moles of copper phosphate= 100 g/380.58

                                               =0.26 moles

3 moles of copper sulphate need 2 mole of Al

0.26 moles of copper sulphate need (2/3)×0.26

                                                         =0.17moles

mass of Al= 0.17×26

                  =4.42g

Therefore, 4.42g of aluminum must react with 100 g of copper (ii) phosphate.

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During electrolysis, a current is passed through the molten MgCl2, and when this happens, the Mg2+ ions move to the negative electrode where they PICK UP OR GAIN ELECTRONS. This is reduction. The Cl- ions move to the positive electrode where they LOSE ELECTRONS. This is oxidation.

Answer:

Explanation:

Dinitrogen pentaoxide is a nitrogen oxide.

...

3.1Computed Properties.

Property Name Property Value Reference

Formal Charge 0 Computed by PubChem

Answer:

+6

Explanation:

Answer:

the answer is chlorophyll....

Explanation:

if u need it's purpose just let me know

Explanation:

the green colouring matter found in plants is called chlorophyll.

Answer:

An impure substance

Explanation:

Substance means: hard surface example: salt,corals,coal.

Answer:

1. -5

2. 88.7

3. -23.3333

4. 126.5

5. 69.8

6. 30.61111

7. 118.4

8. 275

9. 94.82

10. 44.6

Explanation:

Answer:

here you go

Explanation:

1.-5

2.88.7

3.23.333

4.126.5

5.69.8

6.30.6111

7.118.4

8.275

9.94.82

10.44.6

Answer:

40

Explanation:

I'm not sure

Answer:

4400 ml

Explanation:

Answer:

Endocrine system

Explanation:

Endocrine system influences the function of the body's hormones via internal glands that are secreted into the circulatory system.

in a forest fire, your endocrine system would trigger the release of  adrenaline which is the fight or flight hormone. it would affect your heart rate, metabolism, oxygen intake, and blood flow allowing you to move quicker and escape the fire

Answer:

1,4 mol

Explanation:

2 mol of Al reacts with 3 mol of FeO so for 2.1 mol of FeO you need 2 x 2.1 / 3 = 1.4mol

What factors can influence the properties of glass, which include its ability to transmit, reflect, or absorb light, or to be transparent?

Answer · 47 votes

The properties can be influenced by many factors. The most common are the shape of the object, the lighting where the object is located, the environment (colors, shapes, density of other objects, etc.), and the viewing angle of the observer.

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Answer:

Explanation:

The intermolecular forces are stronger in Iodine, meaning that its molecules are stronger and can hold that solid structure at room temperature, where Bromine cannot due to its IMF's being weaker.

Answer:

As the two plates move apart from each other, which often occurs at a rate of several centimetres per year, molten rock wells up from the underlying mantle into the gap between the diverging plates and solidifies into new oceanic crust. Spreading centres are found at the crests of oceanic ridges.

Explanation:

I found this answer by taking notes in class

Answer:

0k HI! so the answer is A

Explanation:

hope is helpful

Answer:

Explanation:

pH > 7   as 10 is more than 7

The cleaner is very corrosive.

It is a moderately basic. If it was 12 that would make it much more basic (100 times more basic).

Answer:

1. A. Thyroid Gland Function

B. detecting Blood Clots

C. Treating Cancer

2. An example would be how many are used as tracers for diagnostic purposes

3. Beneficial because it gives us ways to eleminate pests, by the sterile insect technique

Number three is kinda iffy a bit difficult to explain it may be explained better in your book.

Answer:

B and C

Explanation:

Most animals that live underwater have have gills and tails and vise versa hope this helps!

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Answer:

Sulfur hexafluoride

Explanation:

It is heavier than air that we breathe so it has an opposite effect.

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Answer:

Stopwatch

Stopwatch is a time measuring tool.

Answer:

Hydrogen

Explanation:

An example of this can be In this example, hydrogen is the limiting reagent and oxygen is the excess reagent. The amount of product formed is limited by the amount of hydrogen.

The molarity of the diluted standard solution is obtained by calculation to be 0.015 M.

Recall the dilution formula;

C1V1 = C2V2

C1 = Initial concentration = 0.1140 M

V1 = initial volume =  6.50mL

C2 = Final concentration = ?

V2 = Final volume = 50.0mL

Making C2 the subject of the formula and substituting values;

C2 = C1V1/V2

C2 = 0.1140 M ×  6.50mL/50.0mL

C2 = 0.015 M

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Rebekah reports the volume of sugar solution using metric system as 39.1 mL. Thus, option D is correct.

The metric system has been the measurement system introduced in 1790s. The system has mediated the units for the measurement of volume, mass, length.

The volume has been the space that has been occupied by matter. The volume can be denoted with SI unit L. However, the another accepted unit for volume has been mL.

Thus, the volume of sugar solution has been reported in mL.

The given sugar solution has volume of 1.32 fl. Oz

The volume in mL can be given as:

[tex]\rm 1\;fl\;Oz=29.6\;mL\\1.32\;fl\;Oz=1.32\;\times\;29.6\;mL\\1.32\;fl\;Oz=39.1\;mL[/tex]

The volume of the sugar solution reported by Rebekah on the metric scale has been 39.1 mL. Thus, option D is correct.

For more information about the metric system, refer to the link:

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Answer:

Carbon has 4 valence electrons (electrons that are used in bonding), and therefore it can make 4 bonds which is the most one can (other than some exceptions, but in general it is the most). It wants to make 4 bonds so it can reach a full octet of 8 elections, hence the rule of 8.

Explanation:

Answer:

I suggest you See Explanation. But tldr: Carbon forms four bonds with no lone pairs.

Explanation:

By "rule of 8" I am assuming you mean "Octet Rule." In case you don't know, the octet rule (or rule of 8) is a rule referring to the maximum number of valence shell electrons that an atom can hold: 8 electrons. However, there are exceptions to this: octet-deficient and expanded octet atoms. Octet-deficient atoms follow what is known as the duet rule (or rule of 2), as seen in the case of H and He, or have have a capacity of up to 6 electrons in their valence shell, as seen in the case of B and Be. Expanded octets contain 10, 12, or even 14 electrons and occur in Period 3 elements and after. (It was previously assumed that this was due to d-orbital hybridization but that hypothesis has been disproven and currently an explanation regarding expanded octets doesn't exist. Yet another Nobel Prize worthy concept to solve when you have free time!)

Anyways, how does this all apply to Carbon being the backbone of the millions of organic molecules? Well, carbon follows the octect rule. Unlike duet rule atoms, it is not limited to one bond with another atom. Neither does it hold many lone pairs to itself nor form over four bonds at once causing a decrease in stability. No, Carbon forms four bonds with no lone pairs and has perfect stability in terms of both formal charge and octect rule in many of its structures. Its capacity to bond to up to 4 atoms without comprimising stability is the reason why carbon is the backbone of organic molecules. If you feel this answer helped, gimme brainliest, have a great day! :)

Answer:

A: Cancer that affects the blood

information: Leukemia is a cancer of the early blood-forming cells. Most often, leukemia is a cancer of the white blood cells, but some leukemias start in other blood cell types.

Answer:

liquid matter

Explanation:

Answer:

C (s) + O2 (g) > CO2 (g)

That's what I got