Pls help I’ll mark brainliest

Answer:

The starting position of this object is 3 m.

The object is traveling at a velocity of 3 m/s

Explanation:

the graph begins at 3, and increases by 3 at each second

plz mark me brainliest. :)

Answer:

Largest: Mg

Smallest: Cl

Explanation:

Answer:

4.54g of Tris base,25mL of the 0.25M stock solution of glucose and 7.5mL of the 5M stock solution of NaCl must be added and complete the volume in a volumetric flask to 250.0mL

Explanation:

To prepare the single solution we need to find the moles of each solute (Tris, glucose and NaCl) from the stock solutions anf the solid:

Moles Tris:

0.250L *(0.150mol / L) = 0.0375moles Tris * (121.1g/mol) = 4.54g of Tris base must be added

Moles glucose:

0.250L * (0.025mol/L) = 6.25x10⁻³mol glucose * (1L / 0.25mol) = 0.025L = 25mL of the 0.25M stock solution of glucose must be added

Moles NaCl:

0.250L * (0.150mol / L) = 0.0375mol NaCl * (1L / 5mol) = 0.0075L =

7.5mL of the 5M stock solution of NaCl

You must add:

4.54g of Tris base,25mL of the 0.25M stock solution of glucose and 7.5mL of the 5M stock solution of NaCl must be added and complete the volume in a volumetric flask to 250.0mL

Answer:

A search warrant is a document that is signed by the district attorney, and authorizes the search of a building for the purpose of collecting evidence at a crime scene.

Solution :

For the reaction :

[tex]$\text{TrisH}^+ + H_2O \rightarrow \text{Trish}^- + H_3O^+$[/tex]

we have

[tex]$Ka = \frac{[\text{Tris}^- \times H_3O]}{\text{Tris}^+}$[/tex]

   [tex]$=\frac{x^2}{0.02 -x}$[/tex]

  [tex]$=8.32 \times 10^{-9}$[/tex]

Clearing [tex]$x$[/tex], we have [tex]$x = 1.29 \times 10^{-5} \text{ moles of acid}$[/tex]

So to reach [tex]$\text{pH} = 7.8 (\text{pOH}= 14-7.8=6.2)$[/tex], one must have the [tex]$\text{OH}^-$[/tex] concentration of the :

[tex]$\text{[OH}^-]=10^{-pOH} = 6.31 \times 10^{-7} \text{ moles of base}$[/tex]

So we can add enough of 1 M NaOH in order to neutralize the acid that is calculated above and also adding the calculated base.

[tex]$\text {n NaOH}=1.29 \times 10^{-5}+6.31 \times 10^{-7}$[/tex]

            [tex]$= 1.35 \times 10^{-5} \text{ moles}$[/tex]

Volume NaOH [tex]$= 1.35 \times 10^{-5} \text{ moles} \times \frac{1000 \text{ mL}}{1 \text{ mol}} = 0.0135 \text{ mL}$[/tex]

Tris mass [tex]$H^+ = 0.02 \text{ mol} \times 157.6 \text{ g/mol}=3.152 \text{ g}$[/tex]

Now to prepare the said solution we must mix:

[tex]$3.152 \text{ g Tris H} + 0.0135 \text{ mL NaOH} \ 1 M$[/tex] gauge to 1000 mL with water.

Answer: 10

Explanation: 10 + 4.1 = 10

A gas exerts a pressure of 4.1 atm at 300K. Therefore, 13.1 atm is the pressure of the gas at 1010K.

The force delivered perpendicularly to an object's surface per unit volume over which this force is dispersed is known as pressure. The pressure as compared to the surrounding air is known as gauge pressure.

Pressure is expressed using a variety of units. Some of these come from dividing a unit of force by an area unit the traditional pressure measurement with in imperial and U.S. is the pound-force every square inch, whereas the SI pressure measurement, also called the pascal, becomes a newton per square meter.

P₁/T₁=P₂/T₂    

4.1/300=P₂/1010

P₂ =13.1 atm

Therefore, 13.1 atm is the pressure of the gas at 1010K.

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Answer:

Steps 3 and 4 :)

Answer:

C) Atoms

Explanation:

Hope that helped :)

Answer:

a) 300K

b) 373K

c) 273K

Explanation:

to go from °C to K all you have to do is add 273.

Answer: O a layer of grass clippings, a layer of fruit scraps, some soil, and some water

Explanation:

The compost pile is made up of decomposing organic materials that are obtained from dead and decaying vegetable or plant matter, animal materials like dung, dead skins and others. The decomposition is done by the soil microbes that recycle the matter into nutrients that are absorbed by the plants. All the components of the compost pile are degradable and completely converted into organic matter. The grass clipping and fruit scraps mixed with soil and water can be easily decomposed by the soil microbes easily.

The appropriate layering process for a compost pile would be: a layer of grass clippings, a layer of fruit scraps, some soil, and some water and the correct option is option 4.

This layering process ensures a balanced mix of nitrogen-rich "green" materials (such as grass clippings) and carbon-rich "brown" materials (such as fruit scraps).

The addition of soil introduces microorganisms necessary for decomposition, and water provides moisture for the composting process.

The layering of different materials promotes proper airflow and creates an optimal environment for the decomposition of organic matter, resulting in the formation of nutrient-rich compost.

Thus, the ideal selection is option 4.

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Answer:

In a chemical reaction, there is a change in the composition of the substances; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.

Explanation:

Answer:

13440 J

Explanation:

c ≈ 4200 J / (kg * °C)

m = 80 g = 0,08 kg

[tex]t_{1}[/tex] = 10 °C

[tex]t_{2}[/tex] = 50 °C

The formula is: Q = c * m * ([tex]t_{2} - t_{1}[/tex])

Calculating:

Q = 4200 * 0,08 * (50 - 10) = 13440 (J)

Answer:

CeO₂

Explanation:

Hello!

In this case, since we are given the mass of both cerium and the cerium oxide, we can first compute the moles of cerium and the moles of oxygen as shown below:

[tex]n_{Ce}=4.2gCe*\frac{1molCe}{140.12gCe}=0.03molCe\\[/tex]

[tex]m_O=5.16g-4.2g=0.96gO\\\\n_O=0.96g*\frac{1molO}{16.0gO} =0.06molO[/tex]

Now, we simply divide each moles by 0.03 as the fewest moles in the formula to obtain the simplest formula (empirical formula) of this oxide:

[tex]Ce=\frac{0.03}{0.03}=1\\\\O =\frac{0.06}{0.03}=2[/tex]

Thus, the formula turns out:

[tex]CeO_2[/tex]

Regards!

Answer:

The answer is below

Explanation:

A 21.0 g sample of aluminum, which has a specific heat capacity of 0.897 J g '°C ', is dropped into an insulated container containing 200.0 g of water at 25.0 °C and a constant pressure of 1 atm. The initial temperature of the aluminum is 90.1 °C Assuming no heat is absorbed from or by the container, or the surroundings, calculate the equilibrium temperature of the water. Be sure your answer has 3 significant digits.

Solution:

The amount of heat lost or gained by a substance is given by the formula:

Q = mcΔT

Where Q is the heat lost or gained, m is the mass of the substance, ΔT is the temperature change.

The law of conservation of energy states that energy cannot be created or destroyed but can be transferred.

Therefore the heat lost by aluminum = heat gained by water

[tex]Q_{lost}=Q_{gained}\\\\m_ac_a\Delta T_a=m_wc_w\Delta T_w\\\\m_a= mass \ of\ aluminium = 21g,c_a=specific\ heat\ capacity\ of\ aluminum\\=0.897\ J/g^oC, \Delta T_a=90.1^oC-x,x=equilibrum\ temperature\\m_w= mass \ of\ water = 200g,c_w=specific\ heat\ capacity\ of\ water\\=4.184\ J/g^oC, \Delta T_w=x-25^oC\\\\ hence:\\\\21*0.897*(90.1-x)=200*4.184*(x-25)\\\\1697.2137-18.837x=836.8x-20920\\\\838.8x+18.387=1697.2137+20920\\\\857.187x=22617.2137\\\\x=26.4^oC[/tex]

Answer:

B

Explanation:

Metals are found on the left side of the table and nonmetals the right, (K) is on the very left column meaning it is highly reactive

The option which best describes the properties of potassium (K), based on its position on the periodic table of chemical elements is: B.  a highly reactive metal.

Alkali metals can be defined as the monovalent chemical elements that are found in Group IA of the periodic table.

Generally, these group of chemical elements readily lose their single (one) valence electron to form ionic compounds with non-metals. Some examples of alkali metal are:

Potassium (K) being an alkali metal with a single (one) valence electron in its outermost shell is considered to be highly reactive with other chemical elements, especially halogens because of its position on the periodic table of chemical elements.

In conclusion, Potassium (K) is a highly reactive metal based on its position on the periodic table of chemical elements.

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Answer:

I think its scenario 2 Guitar strings

Explanation:

"You move your fingers and arm to play the guitar! This energy was stored in the molecules inside your muscles and now is being used to move your fingers which, in turn, transfers energy to the strings of the guitar. Now the strings are vibrating, having kinetic energy,"

I searched this up, if you answer requires an explanation put this in your own words.

Answer:

C

Explanation:

Answer:

The zebra mussel is a fresh and brackish water bivalve mollusk. It feeds on plankton and suspended organic matter. It is listed 100 most damaging invasive alien species in the world of the International Union for Conservation of Nature

Zebra mussels are an invasive, fingernail-sized mollusk that is native to fresh waters in Eurasia. Their name comes from the dark, zig-zagged stripes on each shell. Zebra mussels probably arrived in the Great Lakes in the 1980s via ballast water that was discharged by large ships from Europe

Explanation:

hope this helps

Answer:

Eurasia

Explanation:

Answer:

See explanation

Explanation:

The destruction of ozone is a non-elementary reaction. This means that it does not take place in a single reactive encounter. The reaction rather takes place is a sequence of steps called the reaction mechanism.

We can see that in the overall reaction, ozone is reduced to ordinary oxygen thus the ozone layer is depleted by this reaction. It is a two step reaction as shown.

Both steps (1) and (2) are bimolecular. The equation of the net reaction is shown in the image attached.

Answer:

9.solar system

10.comet

11.gravity

12.earth and saturn

Answer:

true

Explanation:

Hotter things have more heat energy than colder things. That's because the atoms or molecules move around faster in hot things (red, right) than they do in cold things (blue, left). ... The more heat you supply, the faster the molecules move and the further apart they get.

Answer: Depends on the situation.

Explanation: Hotter things do have more energy than colder things. But, if the mass of the colder thing is bigger, it really depends. If the colder thing have way more particles than the hotter thing, the colder thing may have more energy.

Explanation:

Please, if I may ask, what is the exact question?

Answer:

This would be 63 gallons :)

Explanation:

The Volume of water = 2.4 × 10² L

The Volume of water in gal = ?

The solution:  We know that one gal is equal to 3.785 litter.

So in conclusion, 2.4 × 10²L × 1 gal / 3.785 L

2.4 × 10²L × 0.264 gal. L⁻¹

0.634 × 10² gal

Hopefully this helps :3

63 gal

Answer:

Fire

Explanation: