Can someone help me with this i don't understand it.

Answer:

a building or group of buildings where goods are manufactured or assembled chiefly by machine.

Answer:

Factorise is a way of writing an expression as a product of its factors using brackets.

Explanation:

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Answer:

gummy´s and it can be lofat gummy´s

Explanation:

Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule

Answer:

Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule.

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Answer:

Yes, actually it is a compound.

Explanation:

There are important differences between the properties of a mixture and a compound. In this table, the column Mixture refers to the gasses hydrogen and oxygen, and the column named Compound refers to water.

Explanation:

Given that,

Mass of metal cube, m = 20 g

Volume of cube, V =5 mL

We need to find the density of the cube. Mass per unit volume equals density.

[tex]d=\dfrac{m}{V}\\\\d=\dfrac{20\ g}{5\ mL}\\\\d=4\ g/mL[/tex]

So, the density of the cube is 4 g/ml.

We know that the density of Aluminium is 4 g/mL.

So, the cube is not Aluminium cube.

The density of Aluminium is 2.7 g/mL.  The cube is not the Aluminium cube.So, option B and E is correct

Mass of metal cube, m = 20 g

Volume of cube, V =5 mL

The formula for density is as follows:-

[tex]Density=\frac{Mass}{Volume} \\\\[/tex]......(1)

Substitute 20 g for mass, and 5 ml for volume in the above equation as follows:-

[tex]Density=\frac{20\ g}{5\ mL} \\\\=4\ g/mL[/tex]

So, the density of the cube is 4 g/ml.

We know that the density of Aluminium is 2.7 g/mL.  So, the cube is not the Aluminium cube. So option B and E are correct.

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Answer:

i would say false.

Explanation:

some discoveries are made as people continue exploring the world...........they are just prooved in the laboratory, while there are other which are still made in the lab and are also examined there.

Answer:

DUPLET RULE: The tendency of an atom to acquire an outer most shell of two electrons is called duplet rule. OCTET RULE: The tendency of an atom to acquire an outermost shell of eight electrons is called the octet rule.

Answer:

10%

Explanation:

Out of the original layer, only ten percent is transferred to the next

Answer:

4789000000

Explanation:

When we multiply anything by 10, we follow the base 10 system rules.

All we simply have to do is move the decimal place 9 places to the right.

4.789 x 10⁹ = 4789000000

Answer:

4,789,000,000

Explanation:

4.789 × 10⁹

using 10⁹ = 1

-----

10⁹

4.789. 4.789

---------- = ---------------------

10⁹ 1,000,000,000

4.789 × 10⁹ = 4, 789, 000, 000

Answer:

3.2x10⁻⁸ moles of vinyl chloride per liter

Explanation:

The concentration of C₂H₃Cl is 2.0x10⁻⁶g/L. To find moles per liter we need to convert this mass to moles using molar mass of vinyl chloride:

Molar mass C₂H₃Cl:

2C = 2*12g/mol = 24

3H = 3*1g/mol = 3

Cl = 1*35g/mol = 35

Molar mass = 35g/mol + 3g/mol + 24g/mol = 62g/mol

2.0x10⁻⁶g * (1mol / 62g) =

Answer:

95,000 centigrams

Explanation:

There is 1000 CG in 0.01 kilograms

so you do 1000*95 which equals 95,000 centigrams.

Answer:

10.85 g of H2O.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

NaOH + HCl —> NaCl + H2O

Next, we shall determine the mass of NaOH that reacted and the mass of H2O produced from the balanced equation.

These can be obtained as illustrated below:

Molar mass of NaOH = 23 + 16 + 1 = 40 g/mol

Mass of NaOH from the balanced equation = 1 × 40 = 40 g

Molar mass of H2O = (2×1) + 16 = 2 + 16 = 18 g/mol

Mass of H2O from the balanced equation = 1 × 18 = 18 g

Summary:

From the balanced equation above,

40 g of NaOH reacted to produce 18 g of H2O.

Finally, we shall determine the mass of water, H2O produced from the reaction as follow:

From the balanced equation above,

40 g of NaOH reacted to produce 18 g of H2O.

Therefore, 24.1 g of NaOH will react to produce = (24.1 × 18)/40 = 10.85 g of H2O.

Therefore, 10.85 g of H2O were produced from the reaction.

Answer:

45

Explanation:

1+4x1=5

2+5x2=12

3+6x3=21

5+8x5=45

Answer:

17.55 carats

Explanation:

First, there is a need to know the mass of 1.0 mL of diamonds. The density of diamond is 3.51 g/mL and density is the ratio of mass and that of volume. Hence;

mass of diamond = density of diamond x volume.

Since the volume of the diamond is 1.0 mL and the density is 3.51 g/mL,

mass of 1.0 mL of diamond = 3.51 x 1.0 = 3.51 g.

1 g = 5 carats, therefore 3.51 g would be;

                3.51 x 5 = 17.55 carats.

Hence, there would be 17.55 carats of diamond in 1.0 mL of diamond.

The families that have the highest reactivities are the a lkali metals and earth alkali metals . These are located far left on the periodic table. They are highly reactive because they have an shell with only 1 electron and need to complete the shell to become stable. The family that is unreactive is inert elements or noble gases.

The alkali metals (lithium family) are highly reactive while the noble gases (helium family) are highly unreactive.

The alkali metals are the elements of group 1 in the modern periodic table which are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).

All alkali metal has their outermost electron in the s-orbital with the outer configuration ns¹. The alkali metals easily lose the outermost electrons to form cations with charge + 1. Therefore they are highly reactive and are stored under oil to stop the reaction with air.

The noble gases have completely filled electronic configurations. The noble gases have a general outer configuration ns²np⁶ so they have completely filled valence shell therefore, they do not feel any attraction for other atoms. Therefore, noble gases exist in monoatomic form. Therefore, noble gases are highly unreactive and also known as inert gases.

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Answer:

Wash your hands thouroughly with soap and water

Explanation:

Guessing. Hope I get it right for a brainly

Answer:

B C E

Explanation:

are all correct

Answer:

Water particles have strong intermolecular forces.

Explanation:

Water molecules are affected by attraction and repulsion and that causes the water to have strong forces and intermolecular strength to be strong.

Water particles have strong intermolecular forces.

Intramolecular forces are the forces that keep atoms together inside a molecule. Intermolecular forces are forces that exist among molecules. determine intermolecular appeal between H-Cl molecules and intramolecular attraction within H-Cl molecules.

The most powerful intermolecular forces are dipole-dipole interactions. A dipole-dipole pressure is while the high-quality aspect of a polar molecule draws the bad facet of every other polar molecule.

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Answer:

2. Solution       3.Solid

Explanation:

Answer:

Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension. This sediment is often formed when weathering and erosion break down a rock into loose material in a source area.

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Sedimentary rocks are one of three main types of rocks, along with igneous and metamorphic. They are formed on or near the Earth’s surface from the compression of ocean sediments or other processes.

Answer:

nitrogen and hydrogen

Its molecular mass is 17g

Explanation:

Ammonia = NH3

nitrogen= 14g

hydrogen= 1g × 3 =3

14+3=17

Answer:

b is the correct answer

Answer:

Glucose is the carbohydrate produced by photosynthesis. Energy-rich glucose is delivered through your blood to each of your cells. ATP is the usable form of energy for your cells.

Explanation:

The process of melting a crystalline solid can be

reversed if the liquid is cooled. The change from the liquid state

to the solid state is called freezing. As the liquid cools, it loses

thermal energy. As a result, its particles slow down and come

closer together. Attractive forces begin to trap particles and the

crystals of a solid begin to form.

"The total kinetic energy of all the particles in a sample of

matter is called thermal energy. Thermal energy, an extensive

property, depends on the number of particles in a substance as

well as the amount of energy each particle has. If either the

number of particles or the amount of energy in each particle

changes, the thermal energy of the sample changes. With identically sized

samples, the warmer substance has a greater thermal energy."

Question part in the given data is missing, however the missing part is as follows:

What safety rules were violated?

Answer:

The correct answer would be:

-Never work in the lab without teacher or adult present

-Keep chemicals away from hands and face.

-Do not touch lab supplies without permission

Explanation:

According to the lab safety and precaution rules one should follow the lab rules strictly to avoid any risk and mishap. These rules include, the chemical management, lab safety equipment, and many other rules including don not work in absence of teacher or the adult.

One should avoid touching chemical and equipment without permission of teacher and never touch chemicals with bare hand and not to touch chemical and keeps it from face.

Answer:

3

Explanation:

calcium (Ca)

carbon(C)

oxygen(O)

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Answer:

3 different elements, 6 total in the Calcium Carbonate molecule

Explanation:

Ca=Calcium

C=Carbon

O=Oxygen (* 3)

Answer:

This law states that, despite chemical reactions or physical transformations, mass is conserved — that is, it cannot be created or destroyed — within an isolated system. In other words, in a chemical reaction, the mass of the products will always be equal to the mass of the reactants.