what mass of small stones would be needed to make the strongest concrete? give a reason for your awnser.

Answers

Answer 1

Answer:

For a good consert mix aggregate needed to the clean hard strong partical free of absorb chemicals or coating clay and other fine materials


Related Questions

Describe the nucleus of an atom in short ​

Answers

Answer:

The nucleus is a small, region at the center of the atom which consists of protons and neutrons.

More Detailed Answer:

The nucleus is a small, dense region at the center of the atom. It consists of positive protons and neutral neutrons, so it has an overall positive charge. The nucleus is just a tiny part of the atom, but it contains virtually all of the atom's mass.

- flexbooks

6. If more reactants are used in a chemical reaction, more products will be produced. This is
because a) More reactants cause the reaction to heat up
b) More reactants take up the same volume
c) More reactants have more atoms to react to form more products
d) Too many products can slow down the reaction

Answers

Answer:

D

Explanation:

A gas mixture contains 1.52 atm of Ne, 766 mmHg of He and Ar. What is the partial pressure, in atmospheres, of At if the gas mixture has a total pressure of 3.27atm

Answers

Answer:

0.74 atm.

Explanation:

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

Pressure of Ne (Pₙₑ) = 1.52 atm

Pressure of He (Pₕₑ) = 766 mmHg

Total pressure (Pₜ) = 3.27 atm

Pressure of Ar (Pₐᵣ) =?

Next, we shall convert the pressure of He from mmHg to atm. This can be obtained as follow:

760 mmHg = 1 atm

Therefore,

766 mmHg = 766 mmHg × 1 atm / 760 mmHg

766 mmHg = 1.01 atm

Finally, we shall determine the partial pressure of Ar. This can be obtained as follow:

Pressure of Ne (Pₙₑ) = 1.52 atm

Pressure of He (Pₕₑ) = 1.01 atm

Total pressure (Pₜ) = 3.27 atm

Pressure of Ar (Pₐᵣ) =?

Pₜ = Pₙₑ + Pₕₑ + Pₐᵣ

3.27 = 1.52 + 1.01 + Pₐᵣ

3.27 = 2.53 + Pₐᵣ

Collect like terms

3.27 – 2.53 = Pₐᵣ

Pₐᵣ = 0.74 atm

Thus the partial pressure of Ar is 0.74 atm.

TIMED PLS HELP AND WILL GIVE BRAINLIST
Given the following reaction:

2 Al + 2 KOH + 4 H2SO4 + 22 H2O --> 3 H2 + 2KAl(SO4)2•12H2O

If you start with 8.3 mL of 9.9M sulfuric acid, what is the theoretical yield of alum?

Answers

Answer:

19.4 g of alum, will be its theoretical yield

Explanation:

The reaction is:

2 Al + 2 KOH + 4 H₂SO₄ + 22H₂O → 3H₂ + 2KAl(SO₄)₂•12H₂O

Let's determine the amount of acid.

M are the moles contained in 1 L of solution or it can be mmoles that are contained in 1 mL of solution

M = mmol /mL

M . mL = mmol

We replace: 8.3 mL . 9.9 M = 82.17 mmoles

We convert to moles: 82.17 mmol . 1 mol / 1000mmol = 0.082 moles

Ratio is 4:2

4 moles of sulfuric acid can make 2 moles of alum

By the way, 0.082 moles of acid may produce ( 0.082 . 2) /4 = 0.041085 moles.

We convert moles to mass:

Molar mass of alum is: 473.52 g/mol.

0.041085 moles . 473.52 g/mol = 19.4 g

As the ZnCl2 dissolved, it separated into zinc ions and chloride ions. Choose the correct reaction.


A. Zinc was oxidized, chlorine was reduced.


B. Zinc was reduced, chlorine was oxidized.


C. This was not a redox reaction.

Answers

Answer:

This was not a redox reaction

Explanation:

A redox reaction is one in which a specie is oxidized and another specie is reduced. This means that one specie gains electrons while the other specie looses electrons.

Zinc chloride solid is composed of zinc ions and chloride ions. The ions only become free in solution. There is no change in the oxidation numbers of the ions as they dissolve in water.

Since the oxidation numbers of the species do not change, the process is not a redox reaction

1.1 Define the concept risky behaviour?​

Answers

Answer:

Risky behavior or risk-taking behavior is defined according to Trimpop (1994) as “any consciously, or non-consciously controlled behavior with a perceived uncertainty about its outcome, and/or about its possible benefits, or costs for the physical, economic or psycho-social well-being of oneself or others.” In addition to this broad definition, there are other definitions of risky behavior depending on the field of research. While in the economic view, risk is defined in terms of the variability of possible monetary outcomes, in the clinical literature, the risk is generally defined as exposure to possible loss or harm (Schonberg, Fox, & Poldrack, 2011). Turner et al. (2004) described risk-taking behavior further as either a socially unacceptable volitional behavior with a potentially negative outcome in which precautions are not taken, such as speeding, drinking and driving, drugs abuse, unprotected sex and so on.


4 Calculate the mass of tin that can be extracted from 100 kg of tin ore that contains
1% tin by mass. Calculate the mass of waste produced.

Answers

Answer:

formula for calculating mass is

first U will HV to find number of moles

m=n×M

Cheese is an example of Solid in gas colloid Liquid in gas colloid Solid in liquid colloid Liquid in solid colloid

Answers

The solution in which the solute particles are suspended in a liquid (fluid) is called colloidal solution. Colloid is a solution that has particles ranging between 1 and 1000 nanometres. Cheese is a solid emulsion in which liquid is solute and solid is solvent. Hence, cheese is colloidal solution of liquid in solid.

Is the number of electrons in different shells of an atom fixed or unlimited ? Explain by giving an example.​

Answers

Answer:

the number of electrons in a particular shell is given by the formula 2n^2 . However an electron when gets very exicited loose energy in the forms of radiation and comes in high energy level shell.

(20 points and excuse any offensive or seemingly bad language in this question) Budding and regeneration are two types of asexual reproduction.

Answers

Answer: true

Asexual reproduction is the process by which an organism is produced from a single parent cell. There are four major forms of asexual reproduction - budding, binary fission, regeneration and parthenogenesis. ... Regeneration is a type of asexual reproduction in which the organism is capable of regrowing certain body parts.

Explanation:

id k what u r talking abt but hope this helps

DIRECTION:Tell how charging takes place in each illustration.​

Answers

Answer:

Due to static charges.

Explanation:

In the illustration, we can see that when we bring the magnet close to the body, the static charges present on the body rearrange theirselves and attracted by the magnet. The magnetic substance is responsible for the arrangement of charges on the body and when they are arranged, they attract each other so we can say that static charges are present on the body and rearrangement occurs in the body.

What is the role of gravity in maintaining the atmospheric layer around Earth ? Please put a simple explanation Thank you !

Answers

Answer:

Explanation:

First of all, we need to understand what gravity is. Gravity in its simplest form can be best visualized as a force of attraction, that pulls all objects that have a mass towards itself.

It is usually exerted by an object with a larger mass and felt by objects with smaller masses.

Putting this into context, the earth exerts a gravitational pull on all substances with masses, which are around it. This includes the oceans, birds, airplanes, clouds, and even gasses in the atmosphere. The atmospheric gasses may be light enough to float, but they can't go very far, since gravity is constantly tugging at them. This keeps the gasses that make up our atmosphere, within a reasonable radius, which is very close to the earth. In a nutshell, gravity prevents them from floating away into outer space.

What is the flow rate of oil if 70mL of oil take 20 seconds to flow out of a pipe?

Answers

Q=Vt Q = V t , where V is the volume and t is the elapsed time. The SI unit for flow rate is m3/s, but a number of other units for Q are in common use. For example, the heart of a resting adult pumps blood at a rate of 5.00 liters per minute (L/min).

Which 3 organisms feed on dead matter and waste products?

Earthworm
Ladybug
Fungi
Mice
Bacteria

Answers

Answer:

mice

bacteria

fungi

Explanation:

that's the answer

what are primary miniral nutrient in plant grawth​

Answers

Mark Brainliest please

Answer


There are 17 nutrients that essential for the growth of the plants. These nutrients are classified into two categories on the basis of requirement micronutrients (required in less amount) and macronutrient (required in large amount). The three primary nutrients needed for plant growth are nitrogen, phosphorous and potassium.

which chemical formula describes carbon monoxide?
a) CO
b) CO2
c) C100
d) CH4

Answers

Es(CO) .

muchas gracias!!

Answer:

[tex]{ \bf{a). \: CO}}[/tex]

What is a covalent bond ?

Answers

What is a covalent bond ?

Answer is c A bond between two atoms resulting from a transfer of an electron.

Explanation:

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.

A covalent bonds is a bond between two atoms that is made up of share electrons.

Options B is correct.

Alpha particles cannot penetrate the skin. In which of the following circumstances could they still threaten human health?

A. If they travel into the human eye.
B. If they are inhaled or swallowed.
C. If they enter into the human ear.
D. If they are touched.

Answers

Answer:

B. If they are inhaled or swallowed.

What is the molarity of a solution prepared by adding enough water to 2 g of acetone to make a total volume of 1.60 l?

Answers

Explanation:

answer is in photo above

1234567890123345678901234567890

Answers

Answer:

1234567890123345678901234567890

Explanation:

trick question....

A flexible container has 5.00 L of nitrogen gas at 298 K. If the temperature is
increased to 333 K, what will be the new volume of that sample of nitrogen?

1) 0.179 L
2) 0.223 L
3) 4.47 L
4) 5.59

Answers

Answer: 5.59 L

Explanation: I'm pretty sure it's this. I just took this test and got it right. Hope this helps you out! :))

Answer:

5.59 L

Points earned on this question: 4

Explanation:

took the test

When a substance melts, evaporates or boils, which four of the following things are true for it's particles?
Select four answers.


A. Lose energy

B. Gain energy

C. Move more

D. Move less

E. Become further apart

F. Become closer together

G. Overcome the attractive forces

H. The forces between them hold them more in place

Answers

Answer:

B, C, E, G

Explanation:

B - As particles are heated, they gain heat energy (or thermal energy, Q) from whatever the source may be.

C - Thermal energy particles gain is converted into kinetic, and the more KE/kinetic energy particles have, the more energy they have to move around.

E - When particles have more energy to move around more, they slide and move past each other and create more space; hence, they become further apart.

G - Eventually, particles will have enough energy and will move around so much that the attracting forces holding them together in the first place will be lesser than the particle's energy to break free and move from the attractive forces.

Please mark me as brianliest :D

What is lassaigne's test?

Answers

Answer:

The Lassaigne's test, also known as 

the sodium fusion test, is used in 

elemental analysis to determine the 

presenceof foreign elements,

 specifically halogens, nitrogen, and 

sulfur, in an organic compound.

--------------------------

☆Hope it helps

☆Have a great day!!

2. Which weather instrument is used to measure wind speed?

Answers

gao yin sheng, zhong yin sheng and the other shengs

Anemometer is an instrument used to measure wind speed

Which law states that the pressure and absolute temperature of a fixed quantity of gas are directly proportional under constant volume conditions?
Boyle’s law
Charles’s law
Dalton’s law
Gay-Lussac’s law

Answers

Answer:

Gay-Lussac’s law

Explanation:

Gay-Lussac’s law is one of the gas laws discovered and proposed by a French scientist called Joseph Gay Lussac (1778 - 1850). In this law, it is stated that the pressure (P) of a gas varies directly with the absolute temperature (T) at a constant volume.

That is;

: P ∝ T

: P/T = K

Where:

P = pressure exerted by the gas

T = absolute temperature of the gas

K = the constant.

Hence, according to this question, the law that states that "the pressure and absolute temperature of a fixed quantity of gas are directly proportional under constant volume conditions" is Gay-Lussac’s law.

Answer:

D. Gay-Lussac’s law

Explanation:

have a great day :)

Which statement best describes John Dalton’s use of creativity in his work?

Answers

Answer:

c

Explanation:

what is Tyndall effect ?​

Answers

My answer is in the picture.

Hope that helps

Stay safe always

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˚*・༓☾✧.* ☽༓・*˚⁺‧

The scattering of a beam of light through a colloidal solution in its dispersed phase is known as [tex]\large\boxed{tyndall \ \ effect}[/tex].

⁺˚*・༓☾✧.* ☽༓・*˚⁺‧

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

꧁❣ ʀᴀɪɴʙᴏᴡˢᵃˡᵗ2²2² ࿐

Which of the following are 'natural polymers
(bio-molecules)? Choose all that apply.
nylon
teflon
silk
cellulose
proteins
polyethylene

Answers

Answer:

cellulose

proteins

silk

Explanation:

A polymer is a macromolecule obtained by the combination of small molecules called monomers.

Polymers may be natural or synthetic. Natural polymers occur in nature. They may be part of living thing, and they include protein, cellulose and silk. These natural polymers are biological molecules.

Synthetic polymers are produced by industrial processes. Synthetic polymers include; nylon, Teflon and polyethylene.

What volume of 12 M NaOH and 2 M NaOH should be mixed to get 2 litres of 9 M NaOH solution?​

Answers

So you add 1.4 L of 12M NaOH to 0.6 L of 2M NaOH to get 2 L of 9M NaOH.

The volume of 12 M NaOH and 2 M NaOH should be mixed to get 2 litres of 9 M NaOH solution is 1.4 L and 0.6 L

What is Concentration ?

In chemistry, concentration is the abundance of a constituent divided by the total volume of a mixture.

Several types of mathematical description can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration.

Amount of stuff = concentration x volume.

We can set up 2 equations:

V₁ = volume 12M NaOH.V₂ =  volume 2M NaOH.

(12×V₁) + (2×V₂) = 9×2 = 18

12V₁ + 2V₂ = 18 (1)

V₁ + V₂ = 2 (2)

From (2) we get:

V₁ = (2 − V₂)

Substituting  V₁ back into (1)  ⇒

12 (2−V₂) + 2V₂ = 18

24 − 12V₂ + 2V₂ = 18

10V₂ = 6

V₂ = 0.6L

From (2) we can say:

V₁ + 0.6 = 2

V₁ = 2 − 0.6 = 1.4L

Therefore, The volume of 12 M NaOH and 2 M NaOH should be mixed to get 2 litres of 9 M NaOH solution is 1.4 L and 0.6 L

Learn more about concentration here ;

https://brainly.com/question/19221273

#SPJ2

How many individual decay steps are in the decay chain of
uranium-238 before the stable end product of lead-206 is
produced?

Answers

Answer:

432

Explanation:

Other Questions
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Problem 2 (2 points): If the rate of net investment flow is given by I(t) = 200e0.2t, calculate:a/ The capital formation from the end of the second year to the end of the sixth year;b/ The number of years required before the capital stock exceeds $200 000.pls The three angles in a triangle have measures of 55, 75, and (2x). What is the value of x? Which sequence is generated by the function f(n + 1) = f(n) - 2 for f(1) = 10?A. -10, -12, -14, -16, -18, ...B. -2, 8, 18, 28, 38, ...C. 8, 18, 28, 38, 48, ...D. 10, 8, 6, 4, 2, ...Not sure the answer HELP!! what are the advantages of encoder The number 0.00325 10-8 cm can be expressed in millimeters as A) 3.25 10-11 mm. B) 3.25 10-10 mm. C) 3.25 10-12 mm. D) 3.25 10-9 mm. Read this passage from a rhetorical text that claimscities should ban the raising of chickens in urbansettings.To support the claim that cities should ban the raising ofbackyard chickens, the writerbcRaising backyard chickens puts people and the foodsupply at unnecessary risk. For example, in 2017 theCenters for Disease Control and Prevention identified1,120 cases of salmonella linked to backyard poultryfarming. 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In this assessment, you will take a virtual field trip to any aquatic ecosystem of your choice and learn about the biotic and abiotic factors that shape it.A virtual field trip is a Web search of a location you are unable to visit in person. For this virtual trip, pick any sea, lake, bay, or river in the world and research the biotic and abiotic factors that make it unique. Include the following features in your virtual field trip research:1. the location of your body of water2. a description of the geography surrounding your body of water3. the effects of sunlight on the aquatic life inhabiting your body of water4. the depths and salinity of your body of water and how this shapes the types of aquatic life present5. the effects of seasonal changes to water temperatures and aquatic life in your body of water6. predictions or current research on the effects of climate change to your body of waterOnce, youve gathered your research, share your virtual field trip with us. Include pictures of your aquatic ecosystem and the life within it in your presentation, but make sure to cite the sources of your pictures and research. Please review the student example and rubric for this virtual field trip before continuing.You may share your field trip in any creative format you would like. Here are a few suggestions:- video or media presentation- slide show- Web page- illustration that includes research notes If you need would like an assessment outline 8Trina has a family history of thyrold Issues, and it has caused many of her family members to gain weight, which is a common sideworried that she may develop thyroid problems one day but does not think that exercise will help since it is a gland, not a musclethat this means that it cannot be targeted and strengthened. What is the BEST response to Trina?OA Isometric exercises strengthen the thyroid gland.OB. If a condition runs in her family, she will get it no matter what.Oc. 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Help pls I'll give 25 points Norms is the force that brings group members closer together.TrueFalse if f(x) = -3x - 5 and g(x) = 4x-2, find (f+g)(x) 12s + 10t = 546s + 10t = 42What is a and what is t