check wether all the answers are correct or not. please?​

Answer:

building really complicated legos

Explanation:

Answer:

double replacement

Explanation:

Answer:

It is indeed double replacement

Explanation:

OwO ^ ^ its A guys knowing cause i took the test

Answer:

C

Explanation:

cookware manufacturers who make pans out of steel only

Answer:

It is Physical Change

Explanation:

Because it is just water turning into another substance of water, nothing chemical is happening.

Answer: A bike

A bike is composed of various simple machines. It has a wheel and axle as one component, and it also has screws to hold the various parts together, along with levers and pulleys that are connected to the pedals. So all of these simple machine concepts work together to help transport the rider from point A to point B.

The other answer choices of screw, inclined plane, and lever, are fairly simple machines that don't have many things going on at once compared to a bike.

The least simple machine is "A Bike"

Hope this helps!

Answer:

[tex]74.64\ \text{g}[/tex]

Explanation:

Reactants

Magnesium = 24.3 g

Hydrogen chloride= x g

Products

Hydrogen gas = 2.04 g

Magnesium chloride = 96.9 g

As the mass of the reactions is conserved we have

Mass of reactants = Mass of products

[tex]24.3+x=2.04+96.9\\\Rightarrow x=2.04+96.9-24.3\\\Rightarrow x=74.64\ \text{g}[/tex]

Mass of hydrogen chloride is [tex]74.64\ \text{g}[/tex].

Answer:

Agree

Explanation:

The deep-sea vent ecosystem gets energy storage molecules without sunlight. Life in the vent ecosystem relies on alternate energy through the use of hydrogen sulfide present in the water emanating from the vent.

The producers that form the basis of the food chain are bacteria that use the hydrogen sulfide to create energy-rich molecule in a process known as chemosynthesis.

The equation of the chemosynthesis is as below:

[tex]CO_2 + 4H_2S + O_2 --> CH_20 + 4S + 3H_2O[/tex]

Answer:

1.67 mol S

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

53.7 g S

Step 2: Define Conversions

Molar Mass of S - 32.07 g/mol

Step 3: Convert

[tex]53.7 \ g \ S(\frac{1 \ mol \ S}{32.07 \ g \ S} )[/tex] = 1.67466 mol S

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

1.67466 mol S ≈ 1.67 mol S

Formation. Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material

Answer:

d is the answer I think .....

Answer:

Voltage is the pressure from an electrical circuit's power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light.

Explanation:

I hope this is right i found it off a website called fluke!

Answer:

Explanation:

All periodic tables list different amounts of elemental masses. I'm going to round Sodium to 23

1 mol of sodium = 23

0.0467 mol sodium = x

Cross multiply

1*x = 0.0467 * 23

x = 1.0741 grams

Answer:

This type of meat is substance. If you were talking about meters then it would be a system of measurement.

Answer:

Mixture

Explanation:

Meat is composed of approximately 72–75 % water, 21 % nitrogenous compounds (19 % proteins and 1.5 % nonprotein nitrogen compounds which include nucleotides, peptides, creatine, and creatinine), 2.5–5 % lipids, 1 % non-nitrogenous compounds (vitamins) and carbohydrates (a very small amount of glycogen).

Answer:

[tex]0.00365\ cm=3.65\times 10^{-3}\ cm[/tex]

Explanation:

Aly's teacher said some bacteria can be as small as 0.00365 cm long.

In this problem, we need to write the length of the bacteria written in scientific notation. Any number can be written in the form of scientific notation as follows :

[tex]N=a\times 10^b[/tex]

a is a real no and b is an integer

In the given number, there are two zeroes before 3. We need to shift the decimal after 3. It can be done as follows :

[tex]0.00365\ cm=3.65\times 10^{-3}\ cm[/tex]

Hence, this is the required solution.

3) orbitals can hold two electrons provided they are spinning in the same direction

We define an orbital in chemistry as a region in space where there is a high probability of finding an electron.

Each orbital holds a maximum of two electrons which spin in opposite direction according to Pauli exclusion principle.

According to this principle no two electrons can have the same set of quantum numbers. As a result, the spin quantum numbers of two electrons in the same orbital must differ hence they spin in opposite directions.

https://brainly.com/question/19536139

Answer:

Liquids and gases show random movements because of potential and kinetic energy.

It happens when heat is applied to the particles and they gain more potential and kinetic energy and move around faster. With gases, they have the most energy.

If anything doesnt make sense, make sure to message me

Answer:

The particles show random motion because liquid and gas particles do not have a rigid structure, unlike solid particles. They are free to go anywhere.  

Explanation:

Answer:

they will die because they need to be in salt water

Answer:

even though the particles of a liquid are moving, they are attracted to each other so they don't spread far apart to become a gas.

Explanation:

"but some do when they evaporate"

In liquids, the particles are allowed to move freely rather than the solid. The gaseous particles can move more freely than liquids.

In liquids, the particles are placed randomly and thus are allowed to move freely but they do not become a gas as liquids are slightly less compressible than gases.  Even though the particles of a liquid are moving, they are attracted to each other so they don't just spread far apart to become a gas.

Find more information about Liquids here:

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Answer:

See explanation

Explanation:

The overall charge on ClO3−  is shown on the image attached to this answer. If we calculate the formal charges on each atom in the structure, we will notice that one oxygen atom has a formal charge of -1 while all other atoms have a formal charge of zero.

This gives the compound an overall charge of -1 as shown in the image attached to this answer. This is the correct Lewis structure for the compound ClO3− .

The molecule has a formal charge of -1 on all oxygen atoms, and +2 on the Cl atom.

When all the electrons of an atom are shared equally, the charge attained by the atom is known as a formal charge.

The formal charge can be calculated as:

Formal charge = valence electron - non-bonding electron - [tex]\rm \dfrac{bonding\;electron}{2}[/tex]

In the molecule, the formal charge of Oxygen = -1.

In the molecule, the formal charge of Chlorine = +2

The oxygen atom has 8 electrons, in which 2 are shared in the bond formation, and 6 electrons are valence electrons.

The chlorine atom has 7 valence electrons in which 6 electron pairs are shared with the oxygen atom, and 1 lone pair has been available with Cl.

The structure of [tex]\rm ClO_3^-[/tex] molecule has been given in the image attached. The image shows the available lone pairs and the bonding in the structure.

Thus, the molecule has a formal charge of -1 on all oxygen atoms, and +2 on the Cl atom.

For more information about the formal charge, refer to the link:

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Answer:

9.4 x 10^-4 J/g°C

Answer:

500g Ika= 10.85 mol 500g (46.0699) - 10.35 mol - 3.00m - 13.62 kq 5.

Explanation:

Does this help?

A 3.00 M solution of [tex]C_2H_5OH[/tex] would be prepared by dissolving 0.500 kg of  [tex]C_2H_5OH[/tex] in 3.62 kg of water.

0.500 kg  [tex]C_2H_5OH[/tex] is equivalent to (mole = mass/molar mass):

      500g/46.07 = 10.85 moles of  [tex]C_2H_5OH[/tex]

3.00 M solution of  [tex]C_2H_5OH[/tex] can be prepared by dissolving 10.85 moles in (molarity = moles/volume):

                      10.85/3 = 3.62 Liters of water

3.62 liters of water weighs (density = mass/volume);

              1 x 3.62 = 3.62 kg

Thus, 3.62 kg of water will be required to prepare the solution.

More on stoichiometric calculations can be found here: https://brainly.com/question/27287858

#SPJ2

The phrase to indicate the flood mitigation technique it describes are:

Floodplain management – protects buildings in low-lying areas

stormwater management – reduces water runoff into streets, lawns, and other sites, and enhanced by the addition of urban green spaces.

Elevated structures-used mainly on the coast, raises structures above flood level.

Flood mitigation is the control and management of movement of the blood water.    

It includes flood gates and flood walls which manage the water of flood and prevent it from destroying building and homes.

There are different types of flood mitigation techniques for different areas.

Thus, Floodplain management – protects buildings in low-lying areas

stormwater management – reduces water runoff into streets, lawns, and other sites, and enhanced by the addition of urban green spaces.

Elevated structures-used mainly on the coast, raises structures above flood level.

Learn more about flood mitigation

https://brainly.com/question/20783715                                                                                                                                                                                                                                              

Flood mitigation manages and controls the flood water by removing inhabitants from the area.  Floodplain management protects buildings.

A flood mitigation is the control and management of the flood water by floodgates and floodwalls to prevent and protect the buildings and people.

The floodplain management of the mitigation technique involves the protection of low-lying buildings, stormwater management controls the flow of the floodwater flow in the streets and elevated structures are used in coastal regions to raise the level of the floodwater.

Therefore, different flood mitigation techniques are used to control and manage flood water.

Learn more about flood mitigation here:

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Answer: it floats because it’s less dense than water

Explanation: since it’s less dense it floats

Answer:

0

Explanation:

Given parameters:

Half-life  = 8.08days

Unknown:

What fraction is left unchanged after 16.16days = ?

Solution:

The half - life of a substance is the time taken for the half of a radioactive material to decay to half.

  Day 0           Day 8.08         Day 16.16

   100%                 50%                 0%        Parent

    0%                     50%                100%     Daughter

After 16.16 days, non of the original sample will remain unchanged.

Answer:

The number of stamps and cards Maggie has left if she gives 45 stamps to a friend is 183

Explanation:

If Maggie gives 45 stamps to a friend, you must calculate the number of stamps and cards she has left.

You know Maggie has 4 folders with 30 stamps in each folder. So the number of stamps she owns is calculated as:

4 folders*30 stamps in each folder= 120 stamps

If Maggie gives 45 stamps to a friend, then the number of stamps she has left will be calculated as the difference (the subtraction) between the stamps she owned and the ones she gives away:

120 stamps - 45 stamps= 75 stamps

On the other hand, she has 3 binders with 36 baseball cards in each binder. So the number of cards she owns is calculated as:

3 binders * 36 baseball cards in each binders= 108 baseball cards

The number of stamps and cards you have left is calculated as:

75 stamps + 108 baseball cards= 183

The number of stamps and cards Maggie has left if she gives 45 stamps to a friend is 183

Answer:

Yes

Explanation:

Sulfur and Sodium will have the same number of electron shells.

  Electronic configuration of

           k   l  m

  Na = 2  8  1

   S =  2  8  6

We see that the have the same energy level.

Also, they belong to the same period on the periodic table. Elements in the same period will have equal number of shell.