Students were given four unknown substances and asked to observe their
characteristics. Their observations are shown in the table below:



Which of the unknown substances is MOST likely a metal?

Answer:

9.99L

Explanation:

you can see the answer at the pic

Answer:

The volume of aluminum is 9.99 cm³.

Explanation:

Given data:

Mass of aluminum = 26.98 g

Density of aluminum = 2.70 g/cm³

Volume of aluminum = ?

Solution:

Formula:

d = m/v

now we will put the values in formula.

2.70 g/cm³ = 26.98 g / v

v = 26.98 g / 2.70 g/cm³

v = 9.99 cm³

Thus, the volume of aluminum is 9.99 cm³.

An orange falls off of a display at a store and rolls 5 meters in 2.5 seconds the average speed of the orange will be 2 meters per second.

Speed if the rate of change of position of an object in a given time of interval or per unit time of interval and it is the ratio of distance traveled to the time taken and the unit will be meter per second.

The average speed of the orange will be if the orange falls off of a display at a store and rolls 5 meters in 2.5 seconds,

               Speed = distance / time

Substituting the value,

    speed =5 meters /2.5 seconds

    speed = 2 meters per second.

Therefore, the average speed of the orange will be 2 meters per second if, the orange falls off of a display at a store and rolls 5 meters in 2.5 seconds.

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Answer:

46.943 million km

Explanation:

From an average distance of 36 million miles (58 million kilometers), Mercury is 0.4 astronomical units away from the Sun.

Answer:

29.169 million miles

Explanation:

From an average distance of 36 million miles(58 million kilometers,Mercury is 0.4 astronomical units away from the sun.

Answer: Here are some examples

Explanation:

1. In the southern spring, ozone is destroyed above Antarctica, mainly by manufactured compounds called chlorofluorocarbons (CFCs )

2. It is now generally accepted that the loss of stratospheric ozone is caused by chemical reactions initiated by chlorofluorocarbons.

3. Your refrigerator and other home appliances emit Chlorofluorocarbons, or CFCs, as do aerosol spray cans.

Hope this hlps!

Explanation:

To be able to put the chemical term chlorofluorocarbons in a sentence, you must first understand what the chemical species denotes.

We know chlorofluorocarbons are a group of compounds that consists of atoms of chlorine, flourine, and carbon.

Now, here are some sample sentences;

Answer: 45

Explanation: it would be 45 bc if the value is 5 and over the number goes up and if it is lower than 5 it would stay the same.

Answer:

45 is the answer

Explanation:

Answer:

5

Explanation:

5

Answer:

Iodine

Explanation:

I hope this answer will help you

Answer:

silicon. ?

Explanation:

lmk if its right.

Answer:

273.6 g

Explanation:

mass =(density)(volume)

mass=(5.7g/cm^3 )(48 cm^3)

cancel out your cm^3 and your are left with grams

multiply (5.7g)(48)=273.6 g

The mass of an object with a density of 5.7 g/cm³ and a volume of 48 cm³ is 273.6 grams.

Density is defined as the degree to which a material is packed together.

It is also defined as a mass per unit volume of the substance.

Its SI unit is kilogram per cubic meter or  gram per meter.

Density can be expressed as

Density = mass / volume

Mass =  density x volume

As given, Density = 5.7 g/cm³

                Volume = 48 cm³

So, Mass =  5.7 g/cm³ x  48 cm³

               =  273.6 grams

Thus, the mass of an object with a density of 5.7 g/cm³ and a volume of 48 cm³ is 273.6 grams.

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Answer:

Volume of the marble is 16 ml.

Initial volume present in graduated cylinder=45 ml.

Final volume in graduated cylinder after marble is dropped=61 ml.

Volume of water displaced=volume displaced by marble.

Volume displaced by marble=final volume in cylinder-initial volume in cylinder

Volume displaced=61ml-45ml=16ml

So volume of marble=16ml.

Answer:

16mL

Explanation:

Answer:

Covalent Bond

Explanation:

Answer:

covalent bonding

Type of Bonding: Sulfur Dioxide is a process of covalent bonding, since Sulfur and Oxygen are both non-metals. The Sulfur is in the center surrounded by 2 Oxygen atoms. In this situation, as depicted below, Sulfur Dioxide is a resonance structure and can be expressed in three different forms

Explanation:

hope that helps

The statement describes a molecule that has a trigonal pyramidal molecular shape is "The molecule has a trigonal planar electron domain geometry with two lone pairs".

So, option C is correct one.

In finding geometry of the molecule, lone pairs and bond pairs both are included but in finding shape of the molecule only bond pairs are are involve.

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Answer:C

Explanation: Took the test

Answer:

Explanation:

If the Earth's gravity is lost, all items held to the Earth's surface by gravity would float away. That includes the atmosphere, water, people, cars and animals. If an object were secured strongly to the Earth, it would probably remain attached

Answer:

Everything would be floating

Answer:An atom's positive particles are surrounded by negative matter, so the negative particles are easier to remove.

Explanation:

From our knowledge of the atom, we know that the nucleus lies at the center of the atom. The nucleus is positively charged because it contains the positive particles in the atom

The negative matter (electrons) surround the positive matter (protons) hence it is easier to remove the negative particles compared to the positive particles.

Answer:

C

Explanation:

Answer: A is the correct answer

Explanation:  It conducts more electricity than almost all other metals ans gems in jewelry

Answer:

The tilt of the Earth's axis also defines the length of daylight.Daylight hours are shortest in each hemisphere winter. Between summer and winter

solistice the number of daylight hours decreases and the rate of decrease is larger the higher the latitude.The fewer sunlight hours the colder nights.

Answer:

3rd principal energy level

Explanation:

Principle energy that explains the energy of the electrons and positions of electrons of a particular atom. There are four energy levels fist to fourth that are made of sublevels and that is made up of s, p, d and f orbitals.

First principal energy level -  2

Second principal energy level - 8

Third principal energy level - 18

Fourth principal energy level -  32

3rd energy level has 9 orbitals, which has 18 electrons

2 in the s orbital,

6 in the three p orbitals, and

10 in the five d orbitals.

So, here there are only 8 electrons in the third principal energy level.

Answer:

Atomic number of a chemical element is the number of protons found in the nucleus of every atom of that element.

The mass number, also called atomic mass number or nucleon number, is the total number of protons and neutrons in an atomic nucleus.

The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom.

Answer:

b and then c

thanks for the brainly points

Answer:

B

Explanation:

Answer:  0.36 atm

Explanation:

According to Dalton's law, the total pressure is the sum of individual pressures.

[tex]p_{total}=p_1+p_2+p_3[/tex]

Given :  [tex]p_{total}[/tex] = total pressure of gases = 0.90 atm

[tex]p_{N_2}[/tex]= partial pressure of nitrogen =  0.26 atm

[tex]p_{H_2}[/tex] = partial pressure of hydrogen = 0.28 atm

[tex]p_{NH_3}[/tex]= partial pressure of ammonia = ?

putting in the values we get:

[tex]0.90=0.26 +0.28+p_{NH_3}[/tex]

[tex]p_{NH_3}=0.36atm[/tex]

Thus the partial pressure of ammonia is 0.36 atm

Answer:

B) 0.36 atm

Explanation:

Answer: Sulfur

Explanation: Sulfur has 16 protons, silicon has 14 protons, and gold has 79 protons.

Answer:

d

Explanation:

Answer:

all of the above

Explanation:

Answer:

Volume = 3.86 ml (Approx)

Explanation:

Given:

Density of cadmium = 8.65 g/ml

Mass of pure object = 33.4 g

Find:

Volume pure cadmium

Computation:

Volume = Mass / Density

Volume = 33.4 / 8.65

Volume = 3.86 ml (Approx)

Answer:

C. C₆H₁₂

Explanation:

Alkenes are the unsaturated hydrocarbons which form a homologous series with a general formula;

       Cₙ H₂ₙ

n in this problem is 6

  2n = 2 x 6 = 12

The formula of the compound will be C₆H₁₂

Answer:

This strange green slime is a colonization of fungi caused by the humidity of the bathrooms, which to be eradicated requires a non-specific antimicrobial such as sodium hypochlorite that generates an osmotic imbalance producing a fungicidal effect.

Explanation:

The fungi that appear in the form of slime at the microscopic level have many forms of colonization, by adding coconut milk it was assumed that this would generate an environment not suitable for their metabolism and reproduction but this did not happen, therefore they continued their reproduction.

Answer:

Explain?

Explanation:

Answer:

12) In the ball and stick model, an orange ball representing the phosphorus atom and three green balls representing chlorine atoms are connected by means of sticks that are coloured halfway green and orange respectively to represent the shared electrons between phosphorus and chlorine with the chlorine atoms forming the base of a triangular pyramid while the phosphorus atom forms the top of the pyramid.

13) The scientist will have 6 grams of product as before but will have two grams of unreacted copper atoms because the mass ratio of copper to sulfur in this reaction is 2:1

Explanation:

12) Phosphorus trichloride has a trigonal pyramidal structure and is composed of three atoms of chlorine and one atom of phosphorus.

In the ball and stick model, an orange ball representing the phosphorus atom and three green balls representing chlorine atoms are connected by means of sticks that are coloured halfway green and orange respectively to represent the shared electrons between phosphorus and chlorine with the chlorine atoms forming the base of a triangular pyramid while the phosphorus atom forms the top of the pyramid.

13) The reaction between copper and sulfur to form copper sulfide is shown in the equation below:

Cu + S ---> CuS

1 mole of copper reacts with 1 mole of sulfur to produce 1 mole of copper sulfide

molar mass of copper = 64 g/mol; molar mass of sulfur = 32 g/mol, molar mass of copper sulfide = 96 g/mol

mass ratio of copper to sulfur = 63 g/ 34 g = 2

This means that 2 grams of copper will react with 1 g of sulfur to produce 3 grams of product. similarly, 4 g of copper will react with 2 g of sulfur to produce 6 grams of product.

Therefore 6 g of of copper will react with 3 g of sulfur. However, since the amount of sulfur available for reaction is 2 g only, 2 g of copper will be left unreacted after 4 g has reacted completely with 2 g of sulfur to produce 6 g of copper sulfide.