A block has a mass of 30g and dimensions of 1.5cm by 4.8cm by 2.3cm. Calculate the density (round to TWO sig figs).

6.02 x \(10^{20\) formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

To convert formula units of MgCl₂ to moles of MgCl₂, we need to use Avogadro's number, which relates the number of formula units to the number of moles.

Avogadro's number (NA) is approximately 6.022 x 10^23 formula units per mole.

Given that we have 6.02 x 10^20 formula units of MgCl₂, we can set up a conversion factor to convert to moles:

(6.02 x 10^20 formula units MgCl₂) * (1 mol MgCl₂ / (6.022 x 10^23 formula units MgCl₂))

The formula units of MgCl₂ cancel out, and we are left with moles of MgCl₂:

(6.02 x 10^20) * (1 mol / 6.022 x 10^23) = 0.1 mol

Therefore, 6.02 x 10^20 formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

It's important to note that this conversion assumes that each formula unit of MgCl₂ represents one mole of MgCl₂. This is based on the stoichiometry of the compound, where there is one mole of MgCl₂ for every one formula unit.

Additionally, this conversion is valid for any substance, not just MgCl₂, as long as you know the value of Avogadro's number and the number of formula units or particles you have.

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Answer:

answer is a

Explanation:

ik cause i did this before

Answer:

B

Explanation:

I think that saying gas and not stating the type seem off.

Answer:

Ions.

Explanation:

Hello!

In this case, since iron is a metal which has lots of uses in the design of metallic alloys and materials, when it is at its ground state we say it is just Fe; however, since it is a metal, it is very likely to lose electrons and therefore getting positively charged as +2 or +3, say:

\(Fe^{2+}\\\\Fe^{3+}\)

Thus, since they are positively charged, they are classified as cations, which are ions.

Best regards!

The density of the can is 0.041 g/mL.

The term density is the ratio of the mass to the volume of an object. We know that the volume is an intrinsic property of the substance. The volume does not change thus, it can be used to identify a substance.

Now we have that the volume of the liquid that the can could hold is 332 ml. This is the real volume of the aluminum can. The mass of the can is found to be 13.5g.

Density = mass/volume = 13.5g /  332 ml = 0.041 g/mL

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Answer:

The growth of any plant is controlled by many factor and it depends on them.

Explanation:

The words are sorted according to their genetic factors and the environment factors by the category on which they effect and impact the growth of a plant.

Genetic factor :

Waxy leaves, bad tasting leaves, disease, leaf structure, types of stem, plant structure, reproduction, types of roots.

Environment factor : sunlight, drought, fire, flood, heat wave, insects, wind, space, pH of soil, temperature, pollution, terrain, soil conditions, lack of air.

Explanation:

well I'm not 100% sure but I studied a little bit with rocks and crystals I've noticed that the hotter the temperature are it does not matter if it is Obsidian the hotter it is the more shinier it will become so the texture of it has to be a right temperature to be able to create a different texture such as a diamond and a diamond has to be compressed so hard that it will turn into diamond this is just an explanation please do not take this as a real answer I hope this help you though

Answer: False

Explanation:

Eating or drinking in the lab can, first and foremost, increase your risk of exposure to hazardous materials. Food or drink can leave a mess increasing the risks for contamination of your experiments and potentially attracting pests.

Answer:

false; one could be in thin shape but thay doesnt always mean they are healthy, or fit...there is always a chance there can be malnutrition or they have a good metabolism, but to be in shape, there should be a good balance of fat and muscle in the body

Answer:

False

Explanation:

Answer:

a Leaning towards the speaker

Answer:

See explanation for sorting of items

Explanation:

Biochemical standard state

Change in [H2O] is assumed to be insignificant

∆G°'

pH=7

Constant value for [Mg^2+]

Chemical Standard State

Temperature is 25°C

Initial concentration of reactants and products is 1M

Pressure is 1 ATM

Both

∆G°

[H^+] = 1M

Nuclear Fission

Nuclear fission, subdivision of a heavy atomic nucleus, such as that of uranium or plutonium, into two fragments of roughly equal mass. The process is accompanied by the release of a large amount of energy. In nuclear fission the nucleus of an atom breaks up into two lighter nuclei.

Nuclear fission is a process where the nucleus of an atom is split into two or more smaller nuclei, known as fission products. The fission of heavy elements is an exothermic reaction, and huge amounts of energy are released in the process.

Isomers are different chemical substances that have different physical and chemical properties, but have the same molecular formula, that is, the same number of atoms of each chemical element.

First, let's see if both have the same molecular formula:

Compound 1: C4H8

Compound 2: C4H8

They have a double bond and have a double bond between the 2nd and 3rd carbons and the carbon is in the opposite direction. This is an indication of geometric isomerism. Geometric spatial isomers is a particular case of spatial isomerism in which isomers are formed by unsaturated open structures (composed of a double bond between carbons).

Therefore, they are cis and trans isomers.

Answer: B. Isomers.

Answer:

Voltaic cells convert chemical energy to electrical energy by means of an oxidation-reduction reaction. Electrolytic cells convert electrical energy to chemical energy, so they are the opposite of voltaic cells. They require an input of electrical energy to cause an oxidation-reduction reaction.

Explanation:

that good enough for ya my asian friend?

Answer:

This is the answer hopefully you understand this also can you mark me brainliest pls

Answer:

entire, increasing, decreasing

Explanation:

The EM Spectrum is the entire range of EM waves in order of increasing frequency and decreasing wavelength.

Answer:

Specifically 100 billion-400 billion.

Answer:

neap tide

Explanation:

There are two different types of tides, which are the spring tide and the neap tide.

Neap tides are weak tides which occur when the gravitational forces of the sun and the moon are at right angles to each other with respect to the earth. Since the sun and moon are at right angles, it causes a difference between the low and high tide.

The spring tide are strong tides which occur when the moon, sun and earth are in straight line. The spring tide occur during full moon and new moon.

Answer:

Neap Tides  

The result is a neap tide. The same effect happens during third quarter. These occur during first and last quarter moons. The gravitational pull is not as strong.

Explanation:

the first answer is correct

Please find the equation to form copper (I) ion from neutral copper (Cu) below:

Hence, the correct equation is   mentioned above.

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Explanation:

According to your question,

no. a. ans would be like; chemical formula is defined as the an expression which determines no. and type of molecule of a compound.

b. no. ans; it tells that what type of compound is formed with the type and no. of atoms present in the atom.

c. no ans; the formulation of h2so4 states that it is acid named as hydrochloric acid which is formed by reacting of hydrogen (2 atoms ) ,sulpher (*1atom) and oxygen(4atoms).

Hope it helps...

Answer:

The mass of N a H C O 3 present is 2.431 g

Explanation:

The sample contains 57.2 % N a H C O 3  by mass.

To find the mass of N a H C O 3  in the sample, we need to find what the equivalent of 57.2 %.

Mass of N a H C O 3  = Percentage Composition * Mass of sample

Mass of N a H C O 3  = 57.2 / 100     * 4.25

Mass of N a H C O 3   = 2.431 g

The mass of N a H C O 3 present is 2.431 g

The mass of the compound (NaHCO₃) contained in 4.25 g is 2.431 g.

The given parameters;

The mass of the compound (NaHCO₃) contained in 4.25 g is calculated by the finding its equivalent in the given percent composition as follows;

\(mass \ = \frac{57.2}{100} \times 4.25\\\\mass = 2.431 \ g\)

Thus, the mass of the compound (NaHCO₃) contained in 4.25 g is 2.431 g.

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Answer:

Explanation:

I hope it helps you.

80 mL of 0.25 M Pb(NO₃)₂ solution are needed to react with 0.40 L of 0.10 M NaCl solution according to the given reaction.

Double displacement reactions, also known as double replacement reactions or metathesis reactions, are chemical reactions in which two ionic compounds react with each other and exchange ions to form two new compounds.

First, we need to determine the limiting reagent in the reaction between NaCl and Pb(NO₃)₂ . The balanced equation shows that the mole ratio of NaCl to Pb(NO₃)₂ is 2:1, so we can calculate the number of moles of each reactant:

moles NaCl = 0.10 M x 0.40 L = 0.04 moles

moles Pb(NO₃)₂  = 0.25 M x V

where V is the volume of Pb(NO₃)₂  solution needed in litres.

To react completely with the NaCl, we need 2 moles of Pb(NO₃)₂  for every 1 mole of NaCl. So, we can set up an equation to solve for V:

0.04 moles NaCl / 2 x (1 molePb(NO₃)₂  / 1 mole NaCl) = 0.25 M x V

Simplifying, we get:

V = (0.04 / 2) / 0.25 = 0.08 L = 80 mL

Therefore, 80 mL of 0.25 M Pb(NO₃)₂ solution are needed to react with 0.40 L of 0.10 M NaCl solution

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Answer:

\(-23592.19\ \text{J/mol}\)

Explanation:

T = Temperature = 309 K

\(\Delta G^{\circ}\) = Standard Gibbs free energy = -65.0 kJ/mol

R = Gas constant = 8.314 J/mol K

\([H^+]\) = Biological standard state has hydrogen ions = \(10^{-7}\ \text{molar}\)

Reaction quotient is given by

\(Q=\dfrac{1}{[H^+]}\\\Rightarrow Q=\dfrac{1}{10^{-7}}\\\Rightarrow Q=10^7\)

Standard biological Gibbs free energy is given by

\(\Delta G=\Delta G^{\circ}+RT\ln Q\\\Rightarrow \Delta G=-65000+8.314\times 309\times \ln10^7\\\Rightarrow \Delta G=-23592.19\ \text{J/mol}\)

The standard biological Gibbs free energy of the reaction is \(-23592.19\ \text{J/mol}\)

Answer:

The first ionization energy varies in a predictable way across the periodic table. The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.

Explanation:

The pressure of the environment affects the liquid's boiling point. The boiling point of the liquid is higher when it is under high pressure than when it is under normal atmospheric pressure. For a given pressure, various liquids have different boiling points.

The temperature at which a liquid's vapour pressure equals the surrounding atmosphere is known as the boiling point of the liquid. This temperature causes the liquid to become a vapour.

The temperature of the liquid, the pressure of the atmosphere, and the pressure of the vapour all affect its boiling point.

We know that change in temperature of a system is given by the following formula:

Initial boiling point (T₁) = 80.1 °C

ΔT = T₂ - T₁

2.25 = T₂ - 80.1

T₂ = 82.35  °C

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Answer:

82.35

Explanation:

acellus

Answer:

Explanation: Step 1: Identify the given information We are given the following information: - Initial volume (V1) = 2.7 L - Initial pressure (P1) = 4.5 atm - Final volume (V2) = 7.2 L - Final pressure (P2) = ? Step 2: Use Boyle's Law Boyle's Law states that the pressure of a gas is inversely proportional to its volume, as long as the temperature and the amount of gas remain constant. Mathematically, it can be represented as: P1 * V1 = P2 * V2 Step 3: Solve for the final pressure (P2) We can rearrange the equation to solve for P2: P2 = (P1 * V1) / V2 Now, plug in the given values: P2 = (4.5 atm * 2.7 L) / 7.2 L P2 = 12.15 / 7.2 P2 ≈ 1.6875 atm Step 4: Round the answer Since we are dealing with pressure, it is common to round the answer to two decimal places: P2 ≈ 1.69 atm

The force that helps keep the Earth in its orbit around the Sun is the gravitational force.

The Sun has a massive gravitational pull due to its large mass, which causes the Earth to be attracted towards it. This force of attraction is what keeps the Earth in its stable orbit around the Sun.

The gravitational force between the Sun and the Earth is balanced by the Earth's velocity and centrifugal force, which allows it to maintain a stable orbit around the Sun.

The gravitational force is the attractive force that exists between any two objects with mass. The magnitude of the gravitational force between two objects is proportional to the product of their masses and inversely proportional to the square of the distance between them.

This means that the larger the mass of the objects and the closer they are to each other, the stronger the gravitational force between them.

In the case of the Earth and the Sun, the Sun is much more massive than the Earth, which means it exerts a much stronger gravitational force on the Earth. The Earth is constantly falling towards the Sun due to the force of gravity.

However, the Earth also has a tangential velocity that keeps it moving in a circular orbit around the Sun. This is known as centrifugal force, which is the force that acts on an object moving in a circular path, pulling it away from the center of the circle.

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