A certain ore is 20.7% nickel by mass. How many kilograms of this ore would you need to dig up to have 70.0 g of nickel?

Explanation:

from producer to primary consumer is the correct answer of this question

Answer:

The answer is B.

Explanation:

"From producer to primary consumer"

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Answer:

There are 1000 mg in 1. g

There are 1000 g in 1 kg

Each students needs 2,250 mg of clay

Explanation:

In order to determine the amount of how many kilograms to order, the teacher will need to find out the total mass of clay required by the students and then the teacher will have to convert the total mass to the units required for the purchase.

The teacher would have to find out how many milligrams make one kilogram as follows

1 kg = 1000 g

1 g = 1000 mg

Therefore, 2,250 mg = 2250/1000 g = 2.25 g

2.25 g = 2.25/1000 kg = 0.00225 kg.

Answer:

its a heterogeneous mixture.

Explanation:

The heterogeneous mixture has a non-uniform composition and has two or more phases. It can be separated out physically.

A homogeneous mixture is a solid, liquid or gaseous mixture that has the same proportions of its components throughout any given sample. Conversely, a heterogeneous mixture has components in which proportions vary throughout the sample.

Examples of Heterogeneous Mixtures

Sugar and sand form a heterogeneous mixture. If you look closely, you can identify tiny sugar crystals and particles of sand. Ice cubes in cola form a heterogeneous mixture. The ice and soda are in two distinct phases of matter (solid and liquid).

Answer:

2. Solution       3.Solid

Explanation:

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:

c) 90

Explanation:

Answer:

C

Explanation:

The amount of heat required to increase temperature by  Δ T of an object with mass  m  and specific heat  s  is given by  Q = m s Δ T . For copper specific heat  s = 0.09   c a l / go C

Mental models also guide your perception and behavior. They are the thinking tools that you use to understand life, make decisions, and solve problems. Learning a new mental model gives you a new way to see the world—like Richard Feynman learning a new math technique. Mental models are imperfect, but useful.

hope this helped :)

Answer:

Quantitative

Explanation:

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:

D) 21.9

Explanation:

1 kilocalorie is equal to 4184 joules

0.001 kilocalorie is equal to 1 calorie

so 5.25 calorie=21.966 joules

Answer:

Oxygen/Carbon dioxide

Explanation:

The basic description of living things are organisms which have a cell system to produce energy with either primarily via respiratory exchange abilities, by the existence .

The primal survival need for a possessing a habitat would have to be oxygen/carbon dioxide present,

I hope this was helpful.

Answer:

Habitat

Explanation:

Thats what its called when an animal has a home there habitat

Answer:

95,000 centigrams

Explanation:

There is 1000 CG in 0.01 kilograms

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

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:

The correct option is;

C. Yes, it would hurt because the bricks would still have the same mass

Explanation:

Given that the expression "like a ton of brick" refers to the tendency of an object being crushed by another object, which is due to the impact of the force, and from Newton's law a force is proportional to the rate of change of momentum produced, therefor if the brick of the same mass is given the same velocity as it had on the Earth while the person remains stationary, it will hurt if the brick hits the person.

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:

None

Explanation:

In reporting experimental procedures/analyses, the inference is made after multiple observations have been summed up, to find the nearest possible outcome that explains the phenomenon.

If all options are listed in the question, nothing was inferred after the procedure and observation.

An example of inference would be "CO23- present" or "Chloride formation"

I hope this explanation is clear.

Answer:

it denotes 6.52× 10⁸ in scientific notation

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.

Hope this help's :)

Answer:

Number of neutrons

Explanation:

The mass of an atom is roughly the sum of the number of protons and neutrons it has. If you have the number of protons, all you would need is the number of neutrons to determine the mass.

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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.

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:

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.

Answer:

3 different elements make up Glucose

Explanation:

C = Carbon ( *6 )

H = Hydrogen ( *12 )

O = Oxygen ( *6 )

Answer:

1.66 mins

Explanation:

Distance = 200 m

Speed = 2 m/s

Time taken = [tex]\frac{Distance}{Speed} = \frac{200}{2} = 100[/tex] secs = 1.66 mins

Answer:

Increase

Explanation:

Density = Mass ÷ Volume

Let the mass be 100 for instance and the original volume to be 4.

100 ÷ 4 = 25

The new volume let it be 2.

100 ÷ 2 = 50

50 is more than 25 so the density increases