what was the name of yesterday's supermoon​

Answer:

Reaction Rate is the reaction rate or reaction is the speed at which chemical reaction takes place.

Rate constant is the chemical kinetics a reaction rate constant or reaction rate

Answer:

78 : 71

Explanation:

From the question given above, the following data were obtained:

Mass of KCl = 149 g

Mass of K = 78 g

Mass ratio of K and Cl =?

Next, we shall determine the mass of Cl in the compound. This can be obtained as follow:

Mass of KCl = 149 g

Mass of K = 78 g

Mass of Cl =?

Mass of Cl = (Mass of KCl) – (Mass of K)

Mass of Cl = 149 – 78

Mass of Cl = 71 g

Finally, we shall determine the mass ratio of K and Cl. This can be obtained as follow:

Mass of K = 78 g

Mass of Cl = 71 g

Mass ratio of K and Cl =?

Mass ratio = mass of K / mass of Cl

Mass ratio = 78 / 71

Therefore, potassium, K and chlorine, Cl are released in mass ratio of 78 : 71

Answer: 1.825 moles of hydrogen gas are produced.

Explanation:

The balanced chemical equation is:

[tex]Mg(s)+2HCl(aq)\rightarrow H_2(g)+MgCl_2(aq)[/tex]  

According to stoichiometry :

2 moles of [tex]HCl[/tex] require = 1 mole of [tex]Mg[/tex]

Thus 3.65 moles of [tex]HCl[/tex] will require=[tex]\frac{1}{2}\times 3.65=1.825moles[/tex]  of [tex]Mg[/tex]

Thus [tex]HCl[/tex] is the limiting reagent as it limits the formation of product and [tex]Mg[/tex] is the excess reagent.

As 2 moles of [tex]HCl[/tex] give = 1 mole of [tex]H_2[/tex]

Thus 3.65 moles of [tex]HCl[/tex] give =[tex]\frac{1}{2}\times 3.65=1.825moles[/tex]  of [tex]H_2[/tex]

Thus 1.825 moles of hydrogen gas are produced.

Answer:

The technique is called weighing by difference

Answer:

The sample's volume at STP is 52.416 L.

Explanation:

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

Then you can apply the following rule of three: if 1 mole of a gaseous sample occupies 22.4 L, 2.34 moles how much volume does it occupy?

[tex]Volume=\frac{2.34 moles* 22.4 L}{1 mole}[/tex]

Volume= 52.416 L

The sample's volume at STP is 52.416 L.

Answer:

How fans work....Instead of sucking in hot air and pushing it down, the fan sucks up cool air and pushes it higher. When the fan forces cool air higher, the cool air forces warm air down. Instead of giving you more access to cool air in your room, the fan gives you more access to the warm air, making you feel nice and cozy.

What fans do....A fan, or a breeze, helps by replacing this hot, humid air with cooler, drier air that allows for more evaporation. Similarly, even without sweat, our body loses heat to the surrounding air simply by convection. ... The breeze from the fan carries that hot air away and perpetuates the process, effectively cooling you off.

Explanation:

Answer:

True

Explanation:

The change which shift the equilibrium to produce the maximum possible amount of SO₃ is decreasing the temperature.

According to this principle if any external stress is applied in the equilibrium state then equilibrium will shift towards that side where the external stress will decreases.

In the given chemical equation energy is releases in the form of heat, then in this condition:

Hence decreasing the temperature will produce maximum SO₃.

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Answer: a) current

Explanation:

Answer:

0.181 M

Explanation:

Begin by finding the total moles by using the volume and molarity given:

[tex]\frac{3.25 mol}{1000 mL} x \frac{25.0 mL}{1} = 0.08125 mol[/tex]

(Remember molarity is mol/L, which is equal to mol/1000 mL.)

Divide the moles by the volume after dilution:

[tex]\frac{0.08125 mol}{450.0 mL} x \frac{1000 mL}{1 L} = \frac{0.181 mol}{L} = 0.181 M[/tex]

The concentration of the diluted solution is 0.181 M.

Answer:

its valnce electrons is 2 and the reaction to metal

Answer:

redox reaction

Explanation:

:D

Answer:

The reaction between metallic aluminum and hydrochloric acid is what is known as an oxidation-reduction reaction or redox reaction. Both oxidation and reduction take place simultaneously.

Answer:

56

Hope this helps :)

Answer:

-2070 kJ

Explanation:

Answer:

C. Sebum

Explanation:

C. Sebum

Answer:

pH = 3.34

Explanation:

We can calculate the pH using Henderson-Hasselbach's equation:

for HCOOH, pKa = 3.75.

We can calculate [HCOO⁻] and [HCOOH] using the given number of moles for each one and the final volume:

Then we proceed to calculate the pH:

The pH of the resulting solution is 3.34.

Since  

Final Volume = 44.12 mL + 250 mL = 294 mL

Now

= 294 mL / 1000

= 0.294 L

Now

[HCOO⁻] = 0.036 mol / 0.294 L = 0.122 M

[HCOOH] = 0.091 mol / 0.294 L = 0.310 M

So, the pH should be

= 3.75 + log0.122/0.310

= 3.34

hence, The pH of the resulting solution is 3.34.

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The diffusion of solutes through transport proteins in the plasma membrane is referred to as facilitated diffusion. Passive transport is a subset of facilitated diffusion. Facilitated diffusion is still passive transport even though it uses transport proteins.

In contrast to passive diffusion, assisted diffusion does not result in the carried molecules dissolving in the phospholipid bilayer. Proteins instead allow the delivered molecules to pass through the membrane without coming into contact with its hydrophobic interior.

Materials move across the plasma membrane with the aid of membrane proteins during facilitated transport, also known as facilitated diffusion.

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Answer:

The great age of continental rocks results from their inability to be subducted. ... We also know that the increase in age of ocean crust away from ocean basins results from creation of new sea floor at the MORs, with destruction of older sea floor at ocean trenches, which are often located near continental margins.

Explanation:

The age of the ocean crust used as evidence for plate tectonics because older ocean crust is being melted back into the mantle at divergent boundaries.Older ocean crust is being melted back into the mantle at divergent boundaries. Therefore, option A is correct.

Plate tectonics is a theory because it supplies an explanation of why and how segments of the earth displace and make earthquakes and mountains and volcanos.

This states why ocean floor rocks are generally less than 200 million years old whereas the oldest continental rocks are more than 4 billion years old.

The great age of continental rocks effects from their inability to be subducted. We also know that the addition in age of ocean crust away from ocean basins results from activity of new sea floor at the MORs, with destruction of older sea floor at ocean trenches.

Thus, option A is correct.

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Your question is incomplete, most probably your question was

Why is the age of the ocean crust used as evidence for plate tectonics?

A Older ocean crust is being melted back into the mantle at divergent boundaries.Older ocean crust is being melted back into the mantle at divergent boundaries.

B There are striations on the ocean crust where the continental crust moved over the top of it.There are striations on the ocean crust where the continental crust moved over the , top of it.

C Ocean crust is older than continental crust so it shows that the continents are younger.Ocean crust is older than continental crust so it shows that the continents are , younger.

D New ocean crust is being formed at underwater divergent boundaries pushing away older crust.

Answer:

2365 g

Explanation:

The mass of CaCl₂ will be 110.98 grams, this can be calculated by using the molarity formula.

It is defined as the ratio of a number of moles of solute to the volume of solution in liters.

It is given by:

M= n/V

What information do we have?

V= 1.0 L

M= 1.0 M

Molar mass of CaCl₂  = 110.98g/mol

To find:

m=?

M= n/V

n= M/V

n= 1 mole

A Number of moles is the ratio of mass over the molar mass.

n = m/ M

1 mole= m / 110.98 g/mol

m= 110.98 grams

Thus, the mass of calcium chloride is 110.98 grams.

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Explanation:

An atomic mass unit is defined as a mass equal to one twelfth the mass of an atom of carbon-12.

Answer:

I will go for a heterogeneous mixture

Explanation:

alloy is basically a mixture

Answer:

a. mass of glucose required = 4.50 g

b. mass of glucose required = 0.05 g

c. mass of glucose required = 25g

Explanation:

1a. molar mass of glucose = 180.156 g/mol

volume of solution = 250 mL or 250 mL * 1 L/1000 mL = 0.25 L

concentration of solution = 100 mM or 100mM * 1 M/1000 mM = 0.10 M

amount in moles = mass/ molar mass = concentration * volume

mass in grams = concentration * volume * molar mass

mass = 0.10 * 0.25 * 180.156

mass of glucose required = 4.50 g

b. mass concentration of 0.05 % solution = 0.05 g/100 ml = 0.5 g/L

volume of solution = 100 mL = 0.1 L

mass in grams = mass concentration * volume

mass in grams =  0.5 g/L * 0.1 L

mass of glucose required = 0.05 g

c. mass concentration of solution = 50 mg/ mL = 0.05 g/ 0.001 L = 50 g/L

volume of solution = 500 mL = 0.5 L

mass of solute required = concentration * volume

mass required = 50 g/L * 0.5 L

mass of glucose required = 25g

Answer:

A. Water particles barely move forward; they move in a circular pattern.

Answer:

For k-12 its:

Explanation:

Water particles barely move forward; they move in a circular pattern.

^^

Answer:

D)

Explanation:

This seems like a weird question

Water is held together by covalent bonds. The amount of energy required to break these bonds so that water would split into it's respective ions is pretty high. The chances that any one of the molecules floating in 1L of water get enough energy to spontaneously burst into it's ions is slim to none.

So, D) seems like the most likely answer

0.0000001 moles​ is the number of water molecules self-ionize in one liter of water.

Water ionization occurs when water molecules sepparate this can lead to two different ions:

Water ionization is not very common. Indeed, most water is found as H2O not as ions. However, in a liter of water it is expected 0.0000001 moles​ ionized or [tex]10^{-7}[/tex].

So, the correct answer is D. because this is the universal logarithm to calculate ionization of water and the concentration of ions.

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The force of gravity points straight down, but a ball rolling down a ramp doesn't go straight down, it follows the ramp. Therefore, only the component of the gravitational force which points along the direction of the ball's motion can accelerate the ball. The other component pushes the ball into the ramp, and the ramp pushes back, so there is no acceleration of the ball into the ramp. If the ramp is horizontal, then the ball does not accelerate, as gravity pushes the ball into the ramp and not along the surface of the ramp. If the ramp is vertical, the ball just drops with acceleration due to gravity. These arguments are changed a bit by the fact that the ball is rolling and not sliding, but that only affects the magnitude of the acceleration but not the fact that it increases with ramp steepness.

Answer:

owa owa owa owa

Explanation:

owa owa owa owa owa owa owa

Answer: Options 1,3,6

Answer:

Wymień różnice między systemem palowym a systemem wiązkowym rośliny