Can someone help me with these three questions? please

Answer:

A double replacement reaction is a type of chemical reaction that occurs when two reactants exchange cations or anions to yield two new products. Double replacement reactions are also called double replacement reactions, double displacement reactions, or metathesis reactions.

Explanation:

hope this helps mark me brainliest thank you <3

Answer:

Biology

Explanation:

I'm currently taking highschool biology right now and it's a lot of fun. If you like animals and cells, a lot of fun.

Answer:

2

Explanation:

Answer:

Although the ocean is one continuous body of water, oceanographers have divided it into four principal areas: the Pacific, Atlantic, Indian, and Arctic Oceans.

Answer:

Some parts to the ocean systems are....

1.) Saltmarsh

2.) Mangroves

3.) Mudflats

4.) Lagoons,

5.) Coral Reefs,

6.) Barrier Islands,

7.) Estuaries,

8.) The Ocean Floor,

9.) The Deep Sea

Hope this helped!

Have a supercalifragilisticexpialidocious day!

Answer:

2. Molten rock rises in Earth's mantle caused by (pressure)

Explanation:

i think i just had a similar question

Answer:

Explanation:

Cr₂O₃ ( chromium oxide )

Mass of Cr₂O₃⁻ = 2 x 52 + 3 x 16 = 104 + 48 = 152

152 gram chromium oxide contains 104 grams chromium

152 tonnes chromium oxide contains 104 tonnes chromium

5 tonnes chromium oxide contains 104 x 5 / 152 tonnes chromium

mass of chromium required =  104 x 5 / 152 tonnes

= 3.42 tonnes .

Answer:

is this true/false? if so its true.

Explanation:

Answer:

a

Explanation:

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Answer:

1.32*10^23 molecules

Explanation:

sucrose formula: C12H22O11

molar mass: 12(12.01)+22(1.01)+11(16.00)=342.34g/mol

75.0 g C12H22O11 * (1 mol C12H22O11)/(342.34g C12H22O11)=0.219 mol C12H22O11

0.219 mol * (6.022*10^23)/mol = 1.32*10^23 molecules (three sig. figures)

Answer:

Explanation:

4

Answer: The molecular formula will be [tex]C_6O_3H_{12}[/tex]

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.  

Empirical weight of [tex]C_2OH_{4}[/tex] is [tex]12\times 2+16\times 1+1\times 4=44g[/tex]

Molecular mass of compound is = 132 g

Now we have to calculate the molecular formula.

[tex]n=\frac{\text{Molecular weight}}{\text{Equivalent weight}}=\frac{132}{44}=3[/tex]

The molecular formula will be=[tex]3\times C_2OH_4=C_6O_3H_{12}[/tex]

Answer:

Density

Explanation:

Density is a measure of how much mass is contained in a given volume

Answer:

1)They have different densities.

2) The molecules are packed differently

Explanation:

Oil and Water have different densities The first reason that water and oil don’t mix is because their molecules are packed differently. The molecules of water are packed very densely. (Would be good to show water molecules packed densely) In one glass of water, there are more molecules than the number of known stars in the universe!

Answer:

diff densities

Explanation:

Answer:

A. stratosphere

E. Fertilizer

Explanation:

Answer:

Option #2 (Green seeds)

Explanation:

Since both the plants are true-breeding, both plants only have the green allele. Therefore, their offspring must also only have the green allele and will therefore have green seeds.

Answer:

it forms copper hydroxide crystals

Explanation:

NaOH(aq)+CuSO4(aq)=Cu(OH)2(s)+Na2SO(aq)

Answer:

C. gold atoms

Explanation:

Metallic bonds are found between atoms of metals. Since gold is the only metal given here, it is the solution to the problem.

Metallic bonds join atoms of metals and alloys together.

The formation of this type of bond is favored by large atomic radius, low ionization energy and a large number of electrons in the valence shell.

The metallic bond is actually an attraction between the positive nuclei of all the closely packed atoms in the lattice and the electron cloud jointly formed by all atoms losing their outermost shell electrons.

Answer:

H2SO4

Explanation:

Firstly,

2.056% hydrogen = 2.056g of H

32.69% Sulphur = 32.69g of S

65.26% oxygen = 65.26g of O

Next, we convert each mass into moles by dividing by their respective molar mass:

H = 1, S = 32, O = 16

H = 2.056/1 = 2.056mol

S = 32.69/32 = 1.021mol

O = 65.26/16 = 4.078mol

Next, we divide each mole value by the smallest mole value (1.021)

H = 2.056/1.021 = 2.01

S = 1.021/1.021 = 1

O = 4.078/1.021 = 3.99

Approximately the ratio of H to S to O is 2:1:4, hence, the empirical formula for H, S and O is H2SO4.

The empirical formula of a chemical compound is the simplest whole-number ratio of atoms present in a compound

The correct answer of the following is [tex]H_2SO_4[/tex]

The data is given as follows:-

We have to find the moles in the reaction.

The mas of the element is as follows:-

After solving the equation we get

[tex]H = \frac{2.056}{1} = 2.056mol\\\\S = \frac{32.69}{32} = 1.021mol\\\\O = \frac{65.26}{16} = 4.078mol[/tex]

Next, we divide each mole value by the smallest mole value (1.021)

[tex]H = \frac{2.056}{1.021} = 2.01\\\\S = \frac{1.021}{1.021} = 1\\\\O = \frac{4.078}{1.021} = 3.99[/tex]

The ratio of H to S to O is 2:1:4,

Hence, the empirical formula for H, S, and O is [tex]H_2SO_4.[/tex]

For more information, refer to the link:-

https://brainly.com/question/15804584

Explanation:

When a metal replaces another metal in solution, we say such a reaction has undergone a single displacement reaction.

In such a reaction, metal higher up in the activity series replaces another one due to their position.

To known the metal or metals that will replace the given copper, we need to reference the activity series of metals.

Every metal higher than copper in the series will displace copper from the solution.

So, there metals are: potassium, sodium, lithium, barium, strontium etc.

Answer:

0.468 is correct answer of your question

Answer:True

Explanation:

ayo

you need to just

5.00 x 10^24 ÷ 6.022 x 10^23 = 8.3028894×10^46

^

this is the n number

so the anwer is you bottom feeders is (8.30 moles N)

Answer:

The molar mass of sodium is 22.990 g/mol.

The molar mass of chlorine is 35.45 g/mol.

To calculate the molar mass of NaCl, we need to multiply the subscript of each element times its molar mass, then add them together. In this case since there is no subscript, it is understood to be

( 1 × 22.990 g/mol ) + ( 1×35.45 g/mol ) = ?

22.990 g/mol + 35.45 g/mol = ?

58.44 g/mol = ?

Hope this helped!

Have a supercalifragilisticexpialidocious day!

Answer:

The orest one is possible D

Explanation:

I think it is true because level 4 has 4 sublevels which is s, p, d and f.