Kinetic friction is the frictional force needed to start an object at rest into
motion.
O A. True
O B. False

The property of liquid that create meniscus in glass tubes is Adhesion

Adhesion is the property of liquid in which two different or disimillar molecules or surfaces to cling to each other. For example, solids have a very high cohesive properties and this make them not to stick to the surfaces they come in contact.

Therefore, Adhesion property of liquids creates a meniscus in glass tube.

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Answer:

Adhesion

Explanation:

Answer:

NO + O2 NO2

Explanation:

The volume of the NaOH used is calculated as 14 mL.

The term stoichiometry has to do with the calculation of the amount of substance in a reaction using mass - mole or mass - volume relationship.

Here;

Number of  moles of CaCO3 = 0.205 g/100.1 = 0.00205 moles

Number of  moles of HCl = 2.00 M * 7/1000 L = 0.014 moles

2 moles of HCl reacts with 1 mole of CaCO3

x moles of HCl reacts with 0.00205 moles of CaCO3

x = 0.00205 moles * 2/1 = 0.0041 moles

Hence HCl is the excess reactant

Amount of excess HCl =  0.014 moles -  0.0041 moles = 0.0099 moles

Concentration of excess HCl reacted = 0.0099 moles/125 * 10^-3 = 0.0792 M

Using;

CAVA/CBVB = NA/NB

CAVANB = CBVBNA

VB = CAVANB/CBNA

VB = 0.0792 M * 10 mL * 1/ 0.058 M

VB = 14 mL

Missing parts;

A 0.205 g sample of caco3 (mr = 100.1 g/mol) is added to a flask along with 7.50 ml of 2.00 m hcl. caco3(aq) + 2hcl(aq) → cacl2(aq) + h2o(l) + co2(g) enough water is then added to make a 125.0 ml solution. a 10.00 ml aliquot of this solution is taken and titrated with 0.058 m naoh. naoh(aq) + hcl(aq) → h2o(l) + nacl(aq) how many ml of naoh are used?

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Answer:

They are all vascular plants.

Explanation:

Vascular plants, also known as tracheophytes, are highly advanced plant creatures with leaves, stems, and roots, as well as a vascular system made up of conducting vessels. Ferns are herbaceous, pteridophytic vascular plants that do not produce flowers or seeds. Gymnosperms are vascular plants that produce seeds but do not produce blooms. Because the seeds aren't covered or protected by an ovary, they can be seen on the plant's leaves or other components. Angiosperms are flowering plants containing seeds that develop inside the ovary, which develops and produces fruit.

Answer:

They all produce seeds

Explanation:

Explanation:

1. wet seving has been propsed as amethofolog to study aggregete stability aganist watet erosion

Answer:

I think is D not sure

Explanation:

In an ecosystem, the corals need the strong water currents found here in order to find sufficient mates.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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A solution has a pH of 5.4, the determination of [H+].

Take negative to other side

-pH = log H+

multiple Antilog on both side

(Antilog and log cancel each other )

Antilog (-pH) = [ H+ ]

New Formula :- Antilog (-pH) = [+H]

Now put the values of pH in new formula

Antilog (-5.4) = [+H]

we can write -5.4 as (-6+0.6) just to solve Antilog

Antilog ( -6+0.6 ) = [+H]

Antilog (-6) × Antilog (0.6) = [+H]

[tex]Antilog (-6) = {10}^{ - 6} , \\ Antilog (0.6) = 4 [/tex]

put the value in equation

[tex] {10}^{ - 6} \times 4 = [H+] \\ 4 \times {10}^{ - 6} = [H+][/tex]

[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]

The ion had 4+ charge when it had 86 electrons, so it should have no charge on it if there are 4 more electrons and the atom will be neutral.

And since we know that number of electrons in a neutral atom is equal to Atomic Number of that atom.

So, at neutral phase, it had 86 + 4 = 90 electrons

hence, our required atom is : Thorium

And it's ion will be ~[tex]\sf Th^{4+} [/tex]

➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖

With an Ag concentration of 0.020 M and a Pb2+ concentration of

0.0010 M, Only PbSO4(s) will precipitate,

Option C is correct

Generally, the equation for the Chemical Reaction  is mathematically given as

Ag2SO4--->2Ag++SO4^{-2}

Where

PbSO4--->Pb2+ +SO4^{-2}

Therefore

Ag2SO4=[0.02^2[0.001]]

Ag2SO4=4*10^{-7}

and

PbSO4=[0.001^2[0.001]]

PbSO4=4*10^{-6}

In conclusion,Since PbSO4>>PAg2SO4, Only PbSO4(s) will precipitate.

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Answer:

option no b is right answer

Answer:

b

Explanation:

The pressure of a 5.00 L flask at 25˚ C that contains 0.200 mol of Cl2 is 0.98atm.

The pressure of a gas can be calculated by using the following expression:

PV = nRT

Where;

P × 5 = 0.2 × 0.0821 × 298

5P = 4.893

P = 4.893 ÷ 5

P = 0.98atm

Therefore, the pressure of a 5.00 L flask at 25˚ C that contains 0.200 mol of Cl2 is 0.98atm.

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Answer:

Your answer would be:
0.98atm.

Explanation:

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Answer:

erosion, weathering, dissolution, precipitation, and lithification So,D.weathering and erosion followed by compaction

Explanation:

mark me brainliest!!

Answer:

pbo2+cl-=clo-+pb(oh)2

Explanation:

balance by ion electron

Answer:

4 shared electrons

Explanation:

There are 4 shared electrons in the lewis structure of h2o2.

Answer:

I don't know but I'm curious now

Answer:

A Violet object

Explanation:

An Violet object attracts the heat after white objects, followed by orange, yellow, green, blue, indigo and violet, which attracts the most heat of any visible color other than black.

Fruits don't taste sour because of less hydrogen ions and less acid.

Scientists discovered that pulp from sour fruit contains more hydrogen ions, which leads sour taste while on the other hand, the sweeter fruit-like pineapples has pulp that contains fewer hydrogen ions, leading to less acidic and sweeter in taste.

So we can conclude that fruits don't taste sour because of less hydrogen ions and less acid.

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Answer:

Explanation:

Whenever you see molar masses in gas law questions, more often than not density will be involved. This question is no different. To solve this, however, we will first need to play with the combined ideal gas equation PV=nRT to make it work for density and molar mass. The derivation is simple but for the sake of time and space, I will skip it. Hence, just take my word for it that you will end up with the equation:M=dRTPM = molar mass (g/mol)d = density (g/L)R = Ideal Gas Constant (≈0.0821atm⋅Lmol⋅K) T = Temperature (In Kelvin) P = Pressure (atm)As an aside, note that because calculations with this equation involve molar mass, this is the only variation of the ideal gas law in which the identity of the gas plays a role in your calculations. Just something to take note of. Back to the problem: Now, looking back at what we're given, we will need to make some unit conversions to ensure everything matches the dimensions required by the equation:T=35oC+273.15= 308.15 KV=300mL⋅1000mL1L= 0.300 LP=789mmHg⋅1atm760mmHg= 1.038 atmSo, we have almost everything we need to simply plug into the equation. The last thing we need is density. How do we find density? Notice we're given the mass of the sample (0.622 g). All we need to do is divide this by volume, and we have density:d=0.622g0.300L= 2.073 g/LNow, we can plug in everything. When you punch the numbers into your calculator, however, make sure you use the stored values you got from the actual conversions, and not the rounded ones. This will help you ensure accuracy.M=dRTP=(2.073)(0.0821)(308.15)1.038= 51 g/molRounded to 2 significant figuresNow if you were asked to identify which element this is based on your calculation, your best bet would probably be Vandium (molar mass 50.94 g/mol). Hope that helped :) 

The cell notation is; Cu^2+(aq)/Cu(s)//Mg(s)/Mg^2+(aq). The standard cell notation helps us to write the cell equation easily.

The electrochemical cell involves the transformation of chemical energy to electrical energy in an electrochemical cell. The two electrodes involved are the cathode and the anode.

In this case, the Mg is the anode and the Cu is the cathode hence the cell notation is; Cu^2+(aq)/Cu(s)//Mg(s)/Mg^2+(aq).

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Answer:It’s important to know WHY. Great explanations are what makes Brainly awesomeExplain everything. Imagine that the person who was asking, knows nothing at all so you need to start from the very beginningAlways include the steps and/or background required to get to the final answer. Let’s help other people understand and solve future problems on their ownShow all the calculation if it is a numerical question.

Explanation:

The lead acid battery produces energy by oxidation of lead. The amount of lead oxidized in this case is 1.47 g.

The lead acid battery is the common accumulator that we have in use. It is made up of a cell that contains lead electrodes in an acid.

The oxidation of lead occurs according to thr equation;

Pb(s) ----> Pb^2+(aq) + 2e

If 207 g of Pb is oxidized by 2(96500)C

x g of lead is oxidized by (221 * 6.20) C

x = 207 g * (221 * 6.20) C/2(96500)C

x = 1.47 g

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Answer:

294 moles of P

Explanation:

For every 1 mol of P4O10 contains 4 mol of P

so;

73.5 mol P4O10 × 4 mol P

1 mol P4O10

= 73.5 × 4

= 294 moles of P

73.5 mol of [tex]P_4O_{10}[/tex] contains 294 moles of P. In 1 mole of [tex]P_4O_{10}[/tex], there are 4 moles of P.

The International System of Units (SI) uses the mole (abbreviated as mol) as its basic unit to measure the amount of a substance. It is mostly used in chemistry and is defined as the volume of a substance that contains exactly 12 grammes of pure carbon-12 in terms of atoms (or equivalent amounts of molecules, ions, or particles). The fundamental notion that atoms combine in whole-number ratios to form compounds serves as the foundation for the concept of the mole. It makes it simple for scientists to convert between a substance's mass and the quantity of atoms or molecules it contains.

In 1 mole of [tex]P_4O_{10}[/tex], there are 4 moles of P.

=4 × 73.5 moles of P.

= 294 moles of P

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Answer: To melt 500 g of ice, 4000 joule of heat is required.

Explanation:

I love the helps

The energy required to melt one gram of ice is 334 J. Then the heat energy required to melt 500 g of ice into water is 1.6 × 10⁵ J.

The change in energy associated with a phase change or any chemical reaction is called enthalpy change. Then, heat energy required to melt or freeze the substance.

The heat of fusion of ice is 334 J/g. Therefore, the heat energy required to melt the 1 g of ice is 334 J. Now the equation being used to  find the energy for m g of ice to melt is:

q = mHf.

Hf = 334J/g

m = 500 g

q = 500 × 334 J/g = 1.6 × 10⁵ J

Therefore, the heat energy needed to melt 500 g of ice to water is 1.6× 10⁵ J.

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Thermal energy flows from hot to colder bodies and is determined by the process of calorimetry.

Thermal energy is the energy transfer process which occurs as a result temperature difference between two bodies.

Thermal energy flows from hot to colder bodies.

The quantity of Heat transfer is determined using a calorimeter.

The calorimeter works on the principle of conservation of energy. The principle of the calorimeter is stated as follows:

The quantity of Heat, q = mass × specific heat capacity × temperature difference

Therefore, it can be concluded that thermal energy flows from hot to colder bodies.

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Answer:

I did this earlier, here's what I put.

Answer:

I expect it is barium sulfate

Explanation:

Based on their nature of waves, seismic waves changes speed as it moves through different materials.

Seismic waves are the waves that are produced and travel through the earth crust during an earthquake.

Seismic waves are often described as elastic waves which is the energy caused by a sudden breaking of rock within the earth's crust.

Seismic waves can travel at different speeds through different types of rock, bouncing back or changing direction.

Therefore, the correct statement which describes a seismic wave during an earthquake is that the wave changes speed as it moves through different materials.

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