What state
of matter has a defined volume but undefined shape?

Answer:

160N

Explanation:

F = m × a

Where;

F = force (Newton)

m = mass (kg)

a = acceleration (m/s²)

According to this question, a 50kg car is pulling a 30kg car. This means that the total mass of the cars is 50kg + 30kg = 80kg

Hence, the force required to accelerate the cars at 2m/s² can be calculated this:

F = 80 × 2

F = 160kgm/s²

F = 160N

Answer:

See explanation

Explanation:

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In a displacement reaction, more reactive element displaces less reactive element from its compound and from the above reaction we observed that, Chlorine displaces bromine from its compound (KBr) to form Potassium chloride (KCl), therefore Chlorine is more reactive non - metal.

The equation for above reaction is :

\( \large\boxed {\mathrm{2KBr + Cl_2 \rightarrow 2KCl + Br_2}}\)

_____________________________

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Answer:

covalent bonds

Explanation:

because the electrons are shared between atoms therefore the binds are very directional

Heat liberated to produce 1 mole of nitric acid is −493 kJ mol−1.

What is nitric acid?
The inorganic substance with the formula HNO3 is nitric acid. It is a mineral acid that is very corrosive. The substance is colourless, but older samples frequently have a yellow cast from decomposition into nitrogen oxides. The majority of nitric acid that is sold commercially has a 68% concentration in water. Nitric acid that is fuming when the solution contains and over 86% HNO3. Fumigating nitric acid can also be classified as red concentrated nitric acid at concentration levels above 86% or white livid nitric acid at concentration levels above 95%, depending on the quantity of nitrogen dioxide present.

The following sequence of reaction occurs in commercial production of aqueous  nitric acid.

4NH3(g)+5O2(g)→4NO(g)+6H2O(l)             ΔH=−904kJ.....(1)

2NO(g)+O2(g)→2NO2(g)                            ΔH=−112kJ.....(2)

3NO2(g)+H2O(l)→2HNO3(aq)+NO(g)         ΔH=−140kJ.....(3)

1mole of HNO3 = 3/2moles of NO2→
32mole ofNO→3/2mole ofNH3
Heat liberated to produce 1 mole of nitric acid is
3/8×(ΔH1)+3/4×(ΔH2)+1/2×(ΔH3)
=(3/2×1/4)(−904)−(3/2×1/2)(−112)−(3/2×1/3)(−140)
=−493 kJ mol−1



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Answer:

Motion, in physics, change with time of the position or orientation of a body. In both cases all points in the body have the same velocity (directed speed) and the same acceleration (time rate of change of velocity).

Explanation:

Answer:

The ball you want to submerge displaces the water occupied in the ball's volume. ... In water the concrete has a buoyancy pressure force equal to the displaced liquid's weight and weighs only 120 pounds until it reaches the surface.

Explanation:

Answer:

Igneous rocks must go through the sedimentary process to change into metamorphic rocks. Igneous rocks are chemically changed into metamorphic rocks because of high temperature and pressure. Metamorphic rocks are formed from melting igneous rocks. Metamorphic rocks and igneous rocks do not follow a rock cycle.

Explanation:

hope this helps!

Answer:

C

Explanation:

It's igneous rocks must go through the sedimentary process answer thing

(1) Beryllium is the fourth element with a total of 4 electrons.In writing the electron configuration for beryllium the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the remaining 2 electrons for Be go in the 2s orbital.

Therefore the Be electron configuration will be 1s²2s².

(2) ron has Total 26 electrons,so In writing electronic configuration of FE(iron) we will put 26 electrons in Orbitals.

For Iron the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for Iron go in the 2s orbital. The next six electrons will go in the 2p orbital. The p orbital can hold up to six electrons. We'll put six in the 2p orbital and then put the next two electrons in the 3s. Since the 3s if now full we'll move to the 3p where we'll place the next six electrons. We now shift to the 4s orbital where we place the remaining two electrons. After the 4s is full we put the remaining six electrons in the 3d orbital and end with 3d6.

Therefore the Iron electron configuration will be 1s²2s²2p⁶3s²3p⁶4s²3d⁶.

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Answer:

D). Scientific method.

Explanation:

'Scientific research method' is described as the method of research that 'employs evidence as well as logic to learn about the natural phenomenon and world.' An observation is made at first, then sufficient data is gathered to formulate a theory or hypothesis and its validity is tested and the results are interpreted. The careful observation is logically tested and justified by testing the accuracy through appropriate evidence. It helps in reaching more authentic conclusions and hence, option D is the correct answer.

Answer:

In physical changes no new materials are formed and the particles do not change apart from gaining or losing energy

Explanation:

Explanation:

i think its B but i'm not fully sure (Correct)

Answer:

B.

Explanation:

Answer:

The usual cause of sea breeze is the difference in specific heat capacity between land and water Land heats and cools more quickly than water. What is the cause of a sea breeze? The air over the land is warmed and rises, to a greater temperature than that over the sea.

Explanation:

Your answer is C ! <3

The difference in specific heat capacity between land and water is the cause of sea breeze.

land and ocean heat up at different rates, sea breezes often occur during hot, summer days. The land surface warms up more quickly than the water surface during the day. As a result, the air above land is warmer than that over water.

Just to refresh your memory, warmer air is lighter than cooler air. Warm air rises as a result. As a result, the warmer air above the ground is rising. The cooler air above the water is moving across the surface of the land to replace the rising heated air as it rises over the land.

This is the sea breeze, which is seen at the top of the next picture. The land breeze that happens is seen at the bottom of the following picture.

Therefore, The difference in specific heat capacity between land and water is the cause of sea breeze.

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The chloride ion's ground state electron configuration is [Ne] 3s2 3p6.

An atom of chlorine that has lost one electron and now has a net charge of -1 is known as a chloride ion.

The chloride ion contains 16 electrons overall due to the loss of one electron from the chlorine atom, which has 17 protons in its nucleus.

The chloride ion's atomic structure resembles that of a chlorine atom, but one electron from the 3s orbital is missing.

The chloride ion now has an electron configuration of [Ne] 3s2 3p6, with the 3s orbital having two electrons and the 3p orbital having six.

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Answer:

9.78x10^(-5) mol

Explanation:

To convert molecules to moles, divide the # of molecules by 6.02x10^23.

5.89x10^19 / 6.02x10^23 = 9.78x10^(-5) mol

I believe gases do not have a definite shape, color, or texture.

A solid has definite volume and shape, a liquid has a definite volume but no definite shape, and a gas has neither a definite volume nor shape

So the answer is a gas

The correct statement about the Big Bang Theory is D) It is a scientific theory because it is a widely accepted explanation of nature. The Big Bang Theory is a scientific theory that describes the origin and evolution of the universe.

The correct statement about the Big Bang Theory is D) It is a scientific theory because it is a widely accepted explanation of nature.

The Big Bang Theory is a scientific theory that describes the origin and evolution of the universe. It is based on extensive observational evidence, such as the observed redshift of galaxies, the cosmic microwave background radiation, and the abundance of light elements in the universe. These pieces of evidence support the idea that the universe began with a hot, dense state and has been expanding and evolving over billions of years.

As a scientific theory, the Big Bang Theory is subject to scientific scrutiny and can be modified or refined based on new evidence or observations. However, it is widely accepted within the scientific community due to the extensive empirical support and its ability to explain a range of cosmological phenomena.

Therefore, option D is the correct statement regarding the nature of the Big Bang Theory as a widely accepted scientific explanation of the universe's origin and evolution.

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Note The Complete Question

The Big Bang Theory states that the universe started with an explosion and expanded over the next few billion years.

Which statement is correct about the Big Bang Theory?

A)It is an everyday life theory because it is based on observation.

B)It is a scientific theory because it cannot be changed or replaced.

C)It is an everyday life theory because it is not supported by evidence.

D)It is a scientific theory because it is a widely accepted explanation of nature

The molar concentration of \(Ca²⁺\) in the original sample was \([Ca²⁺] = 2.10³ M.\)Volume of unknown calcium solution \((V) = 0.555 L = 0.555 dm³ (since 1 L = 1 dm³)\) . Mass of calcium chromate precipitate (\(m) = 416.6 mg = 416.6 x 10⁻³ g (since 1 mg = 10⁻³ g)\)

We need to calculate the molar concentration of \(Ca²\)⁺ in the original sample. First, we convert the mass of the precipitate to moles using its molar mass. The molar mass of calcium chromate \((CaCrO₄)\) can be calculated by adding the atomic masses of its constituent elements:

Molar mass of\(CaCrO₄\)= (40.08 g/mol for Ca) + (51.996 g/mol for Cr) + (4 x 16.00 g/mol for O) = 156.08 g/mol

Now, we can calculate the moles of \(CaCrO₄\) precipitate:

Moles of\(CaCrO₄ (n) = mass / molar mass = (416.6 x 10⁻³ g) / 156.08 g/mol = 2.67 x 10⁻⁵ mol\)

Since calcium chromate has a 1:1 stoichiometric ratio with \(Ca²⁺,\) the moles of\(Ca²⁺\) in the original sample is also\(2.67 x 10⁻⁵ mol.\)

Finally, we can calculate the molar concentration of \(Ca²⁺\)in the original sample by dividing the moles by the volume of the solution:

Molar concentration of\(Ca²⁺ ([Ca²⁺]) = moles of Ca²⁺\)/ volume of solution = \((2.67 x 10⁻⁵ mol) / 0.555 dm³ = 2.10³ M\)

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The molar mass of a 0.314-gram sample of gas having a volume of 1.6L at 287K and 0.92 atm is 0.503g/mol.

The temperature and pressure of a gas that behaves like an ideal gas is directly proportional to one another.

First, calculating molar mass :

The molar mass of a substance can be calculated by dividing the mass of the substance by its number of moles.

However, the number of moles can be calculated using the formula:

PV = nRT

From where;

P = pressure

V = volume

R = gas law constant

T = temperature

n = number of moles

0.92 × 1.6 = n × 0.0821 × 287

1.47 = 23.56n

n = 1.47/23.56

n = 0.624 moles

Molar mass = 0.314 g ÷ 0.624 mol

Molar mass = 0.503 g/mol

Therefore, the molar mass of a 0.314-gram sample of gas having a volume of 1.6L at 287K and 0.92 atm is 0.503g/mol.

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The energy is required to remove a proton from ¹⁵N₇ is

The reaction to remove the proton is given as follows :

¹⁵N₇  ---->   ¹⁴C₆  +  H

The mass of ¹⁵N₇   =  15.000109

the mass of ¹⁴C₆ = 14.003242

The mass of H = 1.007825

The energy requires to remove a proton is given as:

E = ( 14.003242 + 1.007825 - 15.000109) u

E = 0.010958 × 9312.5 MeV

E = 10.2046375 MeV

Thus, energy is required to remove a proton from ¹⁵N₇ with  the masses of the atoms ¹⁵N₇ , ¹⁴C₆ and H are 15.000109 u , 14.003242 u and 1.007825 u , respectively is 10.2046375 MeV.

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Answer:

boiling water on a stove is an example of thermal energy thermal energy produced when the atoms and molecules is in a substance vibrate faster due rise in temperature .

PLEASE mark brainlest ......... please

The temperature of the gas sample was \(269 Kelvin (K).\)

To solve this problem, we can use the ideal gas law:

\(PV = nRT\)

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

First, we need to rearrange the equation to solve for T:

\(T = PV/nR\)

Now we can plug in the given values and solve for T:

\(T = (0.925 atm)(3.51 L)/(1.350 mol)(0.0821 L·atm/mol·K)T = 269 K\)

Therefore, the temperature of the gas sample was \(269 Kelvin (K).\)

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molar solubility of PbBr2 in 0. 500 M KBr solution is 4S3 = 6.60 x 10–6 . PbBr2 ionizes as Pb2+ + 2Br-, molar solubility of PbBr2 in a 0. 500 M Pb(NO3)2 solution is 0.0181 moles/lit..

If molar solubility of PbBr2 is “S”, then solubility of Pb2+ is also “S” but that of Br- would be “2S”. Ksp = [Pb2+] [Br-]2 = (S) (2S)2 = 4S3 = 6.60 x 10–6 4S3 = 6.6 x 10–6,this gives Solubility S = 1.181 x 10–2 = 0.0181 moles/lit. solid's solubility (usually referred to as its molar solubility) is expressed as the concentration of the "dissolved solid" in a saturated solution. This would simply be the concentration of Ag+ or Cl- in the saturated solution for a simple 1:1 solid like AgCl. The other way to express solubility is through molar solubility, which is defined below. It is the number of moles of solute in one litre of saturated solution and is abbreviated with a lower case's'. It is expressed in moles per litre, also known as molarity.

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The given thermochemical equation is as follows Now we need to calculate the amount of acetone used.\(C3H6O(l) + 4O2(g) → 3CO2(g) + 3H2O(g) ΔH∘rxn = −1790 kJ\)

Volume of acetone = 174 mL

Density of acetone = 0.788 g/mL

Now we need to calculate the amount of acetone used.

Mass = Volume × Density=

174 mL × 0.788 g/mL=

137.112 g

Now we can calculate the heat released by using the following formula:

Heat released = n × |ΔH|

Where,n = Number of moles|ΔH|

= Enthalpy change= 1790 kJ/mole

Now we need to calculate the number of moles.

Number of moles of acetone = (mass of acetone) / (molar mass of acetone)

Molar mass of acetone (C3H6O) = 3 × Atomic mass of carbon + 6 × Atomic mass of hydrogen

+ 1 × Atomic mass of oxygen= (3 × 12.01) + (6 × 1.01) + (1 × 16.00

)= 58.08 g/mol

Number of moles of acetone = (mass of acetone) / (molar mass of acetone)= 137.112 g / 58.08 g/mol= 2.361 mol

Now,

Heat released = n × |ΔH|= 2.361 mol × 1790 kJ/mol

= 4233.69 kJ

= 4234 kJ

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Answer:

Yall are coming after that person above me when theres no diagram!!!! HELLO????????????? crazy

Explanation:

The environmental impact of electric car batteries depends on the source of the electricity used to charge them and the method of disposal or recycling of the batteries.

If the electricity used to charge the batteries comes from renewable sources, the environmental impact is minimal. However, if the electricity comes from fossil fuels, the environmental impact can be significant. Additionally, proper disposal or recycling of batteries is important to minimize environmental impact. The environment refers to the natural surroundings and conditions in which people, animals, and plants live. It includes everything from the air we breathe, the water we drink, the land we live on, and the weather patterns that affect us.

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