Someone pls help me I will make you brain

Answer:

Covalent or molecular compounds form when elements share electrons in a covalent bond to form molecules. Molecular compounds are electrically neutral. Ionic compounds are (usually) formed when a metal reacts with a nonmetal (or a polyatomic ion). Covalent compounds are formed when two nonmetals react with each other.

Explanation:

Hope this helps.

Answer:2.3×10^11

Explanation:since scientific notation is as a×10^k with 0<a<=9

Answer:

ITS CALLED RASH

Explanation:

Since we weren't given the moles of hydrogen, we have to find it. However, we can do it all in one step if we set up the equation correctly.

Since   Mass = moles × molar mass

&         Moles = #molecules ÷ Avogadro's Number

∴ mass = (#molecules ÷ Avogadro's Number) × molar mass

            =  (3.7 × 10⁴⁵ mcules ÷ (6.022 × 10²³ mcules/mole)) × 1.008 g/mol)

            = 6.19 × 10²¹ g

Answer:

yes

Explanation:

because

Answer:

Sulphur

Explanation:

Sulphur evolves the elastics of rubber, therein by heating it to make it...Hot.

Answer:

Solution A : calcium hydroxide

Solid B : calcium oxide

Gas C : Hydrogen gas

Explanation:

i) When metals react with water they form hydroxides thus calcium hydroxide

ii) When metals eact with oxygen they form oxides.

iii) Wehn metals react with hydrochloric acid they form a salt and a gas hydrogen.

HOPE THIS HELPED

Answer:

charges, & mass

Explanation:

Answer:

ok i will do the instructions

Explanation:

Answer:

Make sure that its an accepted file. If not try to refresh the page.

Answer:The answer to your question is It will be formed 0.39 moles of H₂

Data

moles of H₂ = ?

moles of HCl = 0.78

moles of Zinc = excess

Balanced chemical reaction

             2 HCl  +  Zn  ⇒  1 H₂  +  ZnCl₂

Process

Explanation:

1.- Use proportions to solve this problem. Consider the coefficients of the balanced reaction.

              2 moles of HCl ---------------------- 1 mol of H₂

              0.78 moles of HCl -----------------  x

              x = (0.78 x 1) / 2

- Simplification

             x = 0.78 / 2

- Result

             x = 0.39 moles of H₂

Answer:

220.1 litres

Explanation:

7442 ounces to litres is 220.0892.

Rounding it to 4 significant figures will make it 220.1

Answer: True

Explanation:

If you’ve seen a baseball game, you’ve probably also experienced the sight of a ball going up and up, until you begin to wonder when it’s going to come down! Yet every time, the ball does fall back to earth. Why? Gravity is an attractive force that exerts a pull between two objects, such as a baseball and the earth.

Answer:

i guess the answer is..true

the ozone in troposphere protects the earth from ultra violet waves that may cause global warming

Answer:

False, True, True, False, False, not sure, True, False, True, True

here u go

Answer:

Calcium has 20 protons 26 neutrons and 20 electrons.

argon has 18 protons

22 neutrons and 18 electrons

Bromine has 35 protons 44 neutrons and 35 electonrs

Explanation:

good luck with your homework hope I helped

Answer:

The velocity is zero

The interpretation of a position-time graph is required.

The correct option is The velocity is zero.

In a position time graph the y axis denotes the position and x axis denotes the time.

A horizontal line where [tex]y\neq 0[/tex].

This means that the points of the line will be for some value of x, the y value will always be constant.

The slope of a position-time graph will gives the velocity of the object.

Slope is given by

[tex]m=\dfrac{\Delta y}{\Delta x}[/tex]

Here, since the graph is a horizontal line, [tex]\Delta y=0[/tex]

[tex]\Rightarrow m=\dfrac{0}{\Delta x}=0[/tex]

The velocity of the person will be zero.

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Answer:

The answer is 36 atoms

Explanation: I took the test and i got 100%

There are 36 oxygen atoms in the representation "6 C₆H₁₂O₆".

We have the expression "6 C₆H₁₂O₆", which represents 6 molecules of C₆H₁₂O₆.

The subscripts are the atomicities of the element, that is, the number of atoms of each element in 1 molecule.

There are 6 atoms of oxygen per molecule of C₆H₁₂O₆. Considering that there are 6 molecules, the total number of atoms of oxygen are:

[tex]6 Molecules \times \frac{6\ O\ atoms}{1Molecule} = 36\ O\ atoms[/tex]

There are 36 oxygen atoms in the representation "6 C₆H₁₂O₆".

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Answer:

2 bonding pairs and 2 lone pairs

Answer:

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.

Explanation:

Answer:

The volume of the gas therefore becomes large as the temperature of the gas increases, the frequency of collisions with the walls of the container must increase. This, in turn, leads to an increase in the pressure of the gas.

Explanation:

hope it helps.

Answer: A, Carbon Dioxide

Explanation:

A. Soda water, like other carbonated beverages, contains carbon dioxide that has dissolved under pressure. When the pressure is released by opening the soda container, the liquid cannot hold as much carbon dioxide, so the excess bubbles out of the solution.

Answer:

A. carbon dioxide

Explanation:

the answer is A

Answer:

1800g

Explanation:

b/c d=m/v

m=dv

m=300×6=1800g

The mass of the liquid in the container is equal to 1800 g.

The density of an object can be described as the mass per unit volume of the object. The average density of any substance equals the total mass of the substance divided by its total volume.

The mathematical formula of the density can be expressed as follows:

The density of material = Mass/Volume

Mass = density × Volume

The S.I. unit of the density of any substance is Kg/m³ and it is an intrinsic property. If the size of the substance increases, the mass increases as well but the density of the substance will stay constant.

Give, the density of the liquid, d = 6.0 g/cm³

The volume of the container, V = 300 cm³

The mass of the liquid = 6 ×300 = 1800 g

Therefore, the mass of the liquid is equal to 1800 g.

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Explanation:

Endogenous pathway for lipid metabolism: VLDL is formed in the liver from triglycerides and cholesterol esters. ... In the liver, LDL is converted into bile acids and secreted into the intestines. In non hepatic tissues, LDL is used in hormone production, cell membrane synthesis, or stored.

Answer:

Law of Conservation of Mass.

Is that Right?

As per the balanced reaction, two moles or 319.4 g of Fe₂O₃ gives 4 moles or 223.4 g of Fe. Thus 6.10 g gives 4.22 g of Fe.

What is ferric oxide?

Ferric oxide is an ionic compound formed from iron and oxygen in which iron is in  +3 oxidation state. It is also called iron oxide which decomposes to form molecular oxygen and iron.

The balanced equation giving Fe and oxygen from ferric oxide is written below:

[tex]\rm 2Fe_{2}O_{3} \rightarrow 4Fe + 3O_{2}[/tex].

The molar mass of ferric oxide is 159.7 g/mol. Thus two moles weighs 159.7 × 2 = 319.4 g. Atomic mass of Fe is 55.85 hence, 4 moles is 223.4 g.

As per the balanced reaction, 319.4 g of ferric oxide gives 223.4 g of iron. Thus mass of iron , Fe produced from 6.10 g of ferric oxide is calculated as follows:

mass of Fe = (223.4× 6.10 ) /319.4

                  = 4.226 g

Hence, 4.22 g of Fe will be produced from 6.10 g of Fe₂O₃.

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Answer:

It's charge will be positive

Explanation:

4>2