Science activity 1.4.2​

Answers

Answer 1
You forgot to the pic again

Related Questions

Name the 3 steps involved in the treatment of polluted water? class 7​

Answers

Explanation:

The processes involved in removing the contaminants include physical processes such as settling and filtration, chemical processes such as disinfection and coagulation, and biological processes such as slow sand filtration

PLS HELP URGENT
Electron dot diagrams
Use your periodic table to write the electron dot diagrams for the following atoms.
1. Calcium (Ca)
2. Polonium (Po)
3. Moscovium (Mc)
4. Boron (B)
5. Fluorine (F)

Answers

i think i’d is calcium

Balance the equation by typing in the correct coefficients into the blank spaces in front of each formula. Type 1 if
the coefficient is 1, do not leave space blank
_EH + _ G2 → _EG + _HG2

Answers

Answer:

2 in front of every one

Explanation:

HOPE IT HELPS

If the volume of an ideal gas is 22.5 L when it is at a temperature of 365 K, what will the volume be when the gas cools to 338K? Be sure to show your work and proper units.

Answers

Answer:

20.8L = Final volume of the gas

Explanation:

Based on Charles's law, the volume of a gas is directly proportional to the temperature of the gas under pressure constant. The equation is:

[tex]\frac{V_1}{T_1} =\frac{V_2}{T_2}[/tex]

where V is volume and T absolute temperature of 1, initial state and 2, final state.

If initial volume is 22.5L, initial T = 365K and final temperature 338K:

22.5L / 365K = V₂ / 338K

20.8L = Final volume of the gas

What is the limiting reactant if 10 moles of NH 3 react with 30.0 moles of NO ?

Answers

Answer:

NO is the limiting reactant.

Explanation:

4NH3 + 6NO --> 5N2 + 6H2O

Molar ration NH3 : NO = 10: 30 = 1: 3

Stoichiometric molar ration NH3:NO = 4:6 = 2:3

NO is the limiting reactant.

what is the mass in grams of 1.204x10^24 molecules of hydrogen gas (H2) ?

Answers

Answer:

4.03 g

Explanation:

The mass in grams of the hydrogen gas is 4.0 g

Stoichiometry

From the question,

We are to determine the mass in grams of the hydrogen gas.

First, we will determine the number of moles of hydrogen gas present.

Using the formula,

[tex]Number\ of\ moles =\frac{Number\ of \ molecules}{Avogadro's\ constant}[/tex]

From the given information,

Number of hydrogen molecules = 1.204 × 10²⁴ molecules

Thus,

Number of moles of hydrogen gas present = [tex]\frac{1.204 \times 10^{24} }{6.02 \times 10^{23} }[/tex]

Number of moles of hydrogen gas present = 2 moles

Now, for the mass of the hydrogen gas

Using the formula,

Mass = Number of moles × Molar mass

Molar mass of hydrogen gas = 2.016 g/mol

Then,

Mass of the hydrogen gas = 2 × 2.016

Mass of the hydrogen gas = 4.032 g

Mass of the hydrogen gas ≅ 4.0 g

Hence, the mass in grams of the hydrogen gas is 4.0 g

Learn more on Stoichiometry here: https://brainly.com/question/2861244

helooo i need help please :)

Answers

It is a ,d and c just make sure tho

Select the chemical formula that contains 10 atoms of hydrogen.
2C4H10
2CH4
2C2H5
2C2H6

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2C4H10 is your answer and you can verify this by looking at the H that has 10 after it

A compound and oxidant react to produce heat and a new product is what reaction

Answers

Answer:

A compound and oxidant react to produce heat and new product is chemical reaction.

What do the colors of light combine to make _______________ light.

Answers

the answer is dure light I'm not sure of this answer ,but it might be to go with .

Solutions of potassium chloride and silver nitrate are mixed.

Answers

Answer:

A solution of potassium chloride when mixed with silver nitrate solution forms an insoluble white substance silver chloride.

Explanation:

:)

Enzymes in your body act as a catalyst. Thus the role of enzymes is to
O inhibit chemical reactions
o increase the rate of chemical reactions
O help you breathe
decrease the rate of chemical reactions

Answers

Increase the rate of chemical reactions. Enzymes act as catalyst which, by definition, speeds up a reaction. Enzymes help just a little more :)

In a given population, which members are most likely to survive and produce offspring?

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Answer:

Those individuals with advantageous traits are more likely to survive and reproduce. The survivors pass down these advantageous traits to their offspring.

Explanation:

Can someone help me plz

Answers

i’m pretty sure the answer is C

PLEASE HELP ASAP
During convection heat is transferred through fluids. Which statement is true about fluids?

Only gasses are fluids
Only liquids are fluids
Only solids are fluids
Both liquids and gasses are fluids

Answers

both liquids and gasses are fluids is the answer

3. Which of the following do all living organisms have in common? A. Cells held up by cell walls B. The method to get water and food into their cells C. Cells are made from pre-existing cells D. Special cells that can do many different things​

Answers

C. Cells are made from pre-existing cells. :) Glad I can help

C.
A 35.5 g cube of aluminum initially at 48.5° C is submerged into 105.3 g of water at 15.4
What is the final temperature of both substances at thermal equilibrium?

Answers

Answer:

The final temperature of both substances at thermal equilibrium is 17.3°C

Explanation:

To calculate the final temperature of both substances at thermal equilibrium -:

First , we calculate the heat of A1  cube as follows -

            q= mSΔT

(where q = heat of the cube , m = mass of cube , S= specific heat of cube  {0.902j/g°C}, T = Temperature )

Putting the values given in the question ,

        [tex]q= 32.5g\times0.902\j/g[/tex]°[tex]C[/tex][tex]\times(T_f-45.8[/tex]°[tex]C)[/tex]

            [tex]29.315\times(T_f-45.8)J[/tex]

Now , calculate the heat of water -

         q=mSΔT

Putting values from the question ,

           [tex]q=105.3g\times4.18j/g[/tex]°[tex]C[/tex][tex]\times (T_f-15.4[/tex]°[tex]C)[/tex]

              =[tex]440.154\times(T_f-15.4)J[/tex]

          Now ,

Heat lost by water A1= Heat gained by water [negative sign about heat lost]

         [tex]-29.315\times(T_f-45.8)J[/tex] [tex]=440.154\times(T_f-15.4)J[/tex]

            [tex]\frac{-(T_f-45.8)J}{T_f-15.4)J} =\frac{440.154}{29.315}=15.0[/tex]

      [tex]-T_f+45.8[/tex]°[tex]C=15T_f-231.2[/tex]°[tex]C[/tex]

       [tex](45.8+231.2)[/tex]°[tex]C[/tex]=[tex]16T_f[/tex]

        [tex]16T_f=277.03[/tex]°[tex]C[/tex]

       [tex]T_f=\frac{277.03}{16}[/tex] = 17.3°C

Therefore , the final temperature of both substances at thermal equilibrium is 17.3°C

             


Which system is responsible for the production of red blood cells?

Answers

hormone erythropoietin (EPO) is responsible for the production of red blood cells.

the answer is the EPO system

Which salt is the most common found in ocean water?

magnesium


calcium carbonate


potassium


sodium chloride

Answers

Answer:

Sodium chloride

Explanation:

There are several salts in seawater, but the most abundant is ordinary table salt or sodium chloride (NaCl). Sodium chloride, like other salts, dissolves in water into its ions, so this is really a question about which ions are present in the greatest concentration. Sodium chloride dissociates into Na+ and Cl- ions.

D sodium chloride sodium is salt

Calculate the number of moles of gas that occupy a 16L container at a pressure of 3 atm and a temperature of 48oC

Answers

Answer:

1.81

Explanation:

3*16=n(0.0821)(48+273)

Why is think chemistry is important? i need 5 paragraph please

Answers

Answer:

because it is so fundamental to our world . chemistry plays a role in everyone lives.

It touches almost every aspect of our existence in some way.

Chemistry is essential for meeting our basic needs of food, cloth, etc.

Chemistry plays a important and useful role towards the development and growth of industries.

chemistry also helps you become who you want to be.

On the periodic table, in which period is copper?

Answers

Answer:

At the top of Group 11 above silver and gold.

Period 4

Explanation:

Which diatomic molecule (H2, N2 or O2) forms the strongest bond and why

Answers

Answer:

Hydorgen will.

Because hydrogen has 1 as valency.

What type of reaction is shown here?
2 NO2-202 + N2
O Double replacement
O Combustion
O Decomposition
O Single replacement
Synthesis

Answers

The given reaction is the type of Decomposition reaction. A decomposition reaction occurs when one reactant splits into many products.

What does a reaction's breakdown entail?

Chemistry reaction reactions of decomposition. Decomposition reactions occur when complex chemical entities split apart into smaller components. Decomposition reactions often demand energy input.

What are the names for decomposition reactions?

Decomposition reactions are those that divide or break the compounds into two simpler products. Because two or more reactants are combined to create a single product in a combination reaction, they are known as the reverse of combination reactions.

The exothermic nature of a decomposition reaction is why?

It entails the severing of ties. Energy is necessary to dismantle the bonding between atoms. Decomposition advances when energy in the form of heat or electricity is provided. As the bond is broken during this reaction, energy is given to them, making them endothermic processes.

To know more about the decomposition reaction visit:

https://brainly.com/question/16728382

#SPJ1

what fault block that is located below the fault​

Answers

Answer:

it is called the foot block

I'LL GIVE 30 POINTS PLEASE ANSWER!!!
Which terms correctly identify the indicated structures in this sketch of a cell viewed under a microscope? Match each label to the correct cell part. Question 5 options: Golgi Apparatus Nucleus Endoplasmic Reticulum Mitochodrion Ribosome Lysosome
1.

2.

3.

4.

5.

6.

Answers

1.Golgi
2. nucleus
3.Endoplasmic
4.Mitochondria
5.Ribosome
6.Lysosome

(8.6 1029) 7.4 X1029)

Answers

Answer:

65563.914234

Explanation:

8.61029 x 7.4 x 1029

63.716146 x 1029

multiply

= 65563.914234

What do properties of matter tell us about a substance?

Answers

Answer:

Chemical properties of matter describes its "potential" to undergo some chemical change or reaction by virtue of its composition. What elements, electrons, and bonding are present to give the potential for chemical change. It is quite difficult to define a chemical property without using the word "change"

Explanation:

At what point in the cooking process is food typically seared?

Answers

Answer: when you look at the meat, and it looks beautiful like a crispy donut made by Gordan Ramsay

Explanation:

Hells Kitchen is kewl

Which substance would be the strongest?
carbon
steel
gold
silver

Answers

Answer:

steel

Explanation:

Answer:

B. STEEL

Explanation:

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In the One Leg Stand Test, the suspect is asked to ...A. walk heel to toe, one leg at a time.B. turn around on one leg.c. balance on one leg. Explain why this quadrilateral is not a parallelogram. I had to write a argumentative essay on how fortnite was addictive and I was just wondering if I need to edit. Do you wonder what your kid is playing all the time and is it affecting them? Kids/teens are playing a video game called Fortnite and parents and teachers are debating if this game is an addiction or just an amusement. Parents, teachers, and scientists are trying to figure out the outcome of this issue if it is addicting. Some people think that this game is just an amusement and something for kids to enjoy but others think it is an addiction and that it is affecting them. Although Fortnite is an amusing game that kids can have fun with, we need to understand that kids play it too much because they can be affected in school and themselves because of not finishing their work, and it is also affecting their mental health, and it is a big distraction with life at home as well. First, why Fortnite is an addiction is because kids will not be able to get their work done in class. In the article "Fortnite-Addiction or Amusement" it states Teachers are finding that this is the hottest topic of conversion, and they are spending all their time at home playing this game, forgetting about their academic responsibilities" (Crouch 13). This explains that kids are talking about Fortnite instead of doing their school work. One time when I was at school we were doing a school project and I got assigned with classmates that liked to play Fortnite and that is all they talked about during the time we had to do the project and I did pretty much all the work. In conclusion, kids are spending way too much time talking about it instead of working at school. I Next, why Fortnite is an addiction is because it could be affecting their own health. According to the author of the article "Fortnite-Addiction or Amusement" it states "According to Psychology Today, "[too much screen time] can unintentionally cause permanent damage to their still-developing brains" (Crouch 10). This explains that playing video games can cause permanent damage to their brains. To explain further this means when looking at a screen for too long this may cause their permanent damage to their brains because they are still growing. In conclusion, too much screen time can cause permanent damage to the brain unless already fully developed. On the other hand, Fortnite can be an amusing game by it being free for everyone. According to the text it states "First, one of the top reasons why Fortnite is so popular is because the initial game is free" (Crouch 5). However, that means that the game is more accessible and becomes more of a distraction with more kids/ieens. According to the author Though many will argue that Fortnite is not the root of the problem in households and classrooms, many parents and teachers disagree, and they are seeing this game become a huge distraction and addiction in and out of the classroom" (Crouch 9). We need to find a way to stop this being such a distraction. In conclusion, although Fortnite is an amusing game that kids can play with friends and after school, we need to understand that kids need to stop making it such a distraction because of not finishing their work, and it is also affecting their mental health, and it desensitizes kids. Teachers in school are noticing that kids in school are only talking about the game Fortnite and it's distracting them from doing work. 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