Pls, Help ASAP with 30 points!!!
Describe the similarities and differences between the eruptions of
less gassy and more gassy magma.

Answer:

D. Uses sunlight to create glucose (sugar)

Explanation:

The function of the chloroplast is that it uses sunlight to create glucose.

The chloroplast allows for light to be trapped which is used for the synthesis of glucose from carbon dioxide and water.

The chloroplast is a rich in a pigment called the chlorophyll. This chlorophyll is a green pigment which allows for the trapping of solar energy

This solar energy is used to carryout the photosynthetic reaction.

Answer:

1. because what if you do a incorrect ion? it would be all wrong! 2. you dont get it quickly because! you might get the wrong equipment. 4. yep! no food or drinks!

Explanation:

hope this helps ☻︎

As you can see the picture, in the three given compounds i.e. ethane, ethene and ethyne, ethyne have shortest bond. Bond length of ethyne is very short when compared to the ethane and ethene. Shorter the bond, bond strength will be more. Hence, our answer is ethyne.

Answer:

ethyne has shortest bond

Answer:

40

Explanation:

M = n/v  hope this helps :b

The correct answer for emperical and molecular formula = C5H14N2 .

3.23 g x (12.011 / 44.0098) = 0.8815 g carbon

1.865 g x (2.016 / 18.0152) = 0.2087 g Hydrogen

1.58 g x (28.014 / 108.009) = 0.4098 g Nitrogen

1.50 g minus (0.8815 + 0.2087 + 0.4098) = 0.

Convert each element's mass to moles.

0.8815 g/12.011 g/mol = 0.0734 mol carbon

0.2087 g 1.008 g/mol = 0.207 mol Hydrogen

0.4098 g 14.007 g/mol = 0.02926 mol Nitrogen

Step three is to calculate the ratio of molar amounts expressed in the smallest, whole numbers.

0.0734 mol 0.02926 mol = 2.51 carbon

7.07 mol hydrogen = 0.207 mol 0.02926 mol

Nitrogen: 0.02926 mol = 1 Nitrogen: 0.02926 mol = 1

Doubling each value yields C = 5, H = 14.14, and N = 2, resulting in the empirical formula C5H14N2. 

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Answer: Fatty foods are a type of food works best to slow the speed at which alcohol is absorbed by the body.

Explanation: The slowly alcohol is metabolized by the body, fatty foods are better for this. The delaying factors are that heavy foods, including oil and non-vegetarian food, are intoxicating. The body takes significantly longer to digest and occupies the stomach longer.

Answer:

Rich in heart-healthy monounsaturated fats, avocados are one of the best foods you can eat before drinking alcohol.

Explanation:

That's because fat takes much longer to digest than protein or carbs, which can help slow the absorption of alcohol.

Answer:

A polymer is any of a class of natural or synthetic substances composed of very large molecules, called macromolecules, which are multiples of simpler chemical units.  Polymers make up many of the materials in living organisms and are the basis of many minerals.

Explanation:

Explanation:

The first man-made polymers were actually modified versions of these natural polymers. Celluloid, the stuff from which silent-movie film was made, was a plastic created from chemically modified cellulose. The first completely synthetic polymer (that is, made by people through chemical synthesis), invented in the early years of the twentieth century, was Bakelite: a plastic made by reacting phenol and formaldehyde under pressure at high temperatures.

# be careful #

Answer:

0.054 moles of carbon dioxide will be produced

Explanation:

Step 1: Data given

Number of moles oxygen = 0.085 moles

Step 2: The balanced equation

2C8H18 + 25O2 → 16CO2 + 18H2O

Step 3: Calculate moles of carbon dioxide

For 2 moles octane we need 25 moles oxygen gas to produce 16 moles carbon dioxide gas and 18 moles water vapor

0.0544

For 0.085 moles O2 we'll have 16/25 * 0.085 = 0.054 moles CO2

0.054 moles of carbon dioxide will be produced

Answer:

less than 45 cm, as the ball transforms some of its potential eneregy to termal energy and sound energy

Answer:

A. CODIS

Explanation:

The Combined DNA Index System (CODIS), administered by the FBI, maintains DNA profiles obtained through federal, state, and local DNA sample collection programs, and makes this information available to law enforcement agencies across the country for law enforcement identification purposes.

Answer:

Characteristics...

Explanation:

I hope that's right, if not super sorry. I'm not the smartest. I tried my best if it's wrong

Answer:

C. heat the substance to the boiling point.

Answer:

heat the substance

Explanation:

Answer:

Synthesis

Explanation:

The given chemical equation MgBr₂ + NaCl -> MgCl₂+ NaBr is a double displacement reaction where in the anions of two compounds are exchanged with each other.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Strong electrolytes : NaCl, HBr The correct options are a and b.

Weak electrolytes : HCH3CO2 The correct option is c.

Non-electrolyte:  CH3OH, H2O The correct options are d and e.

The classification of aqueous solutions as non-electrolytes, strong electrolytes, or weak electrolytes depends on the degree to which they dissociate into ions when dissolved in water.

a) NaCl - Strong electrolyte: It dissociates completely into its ions (Na+ and Cl-) when dissolved in water.

b) HBr - Strong electrolyte: It also dissociates completely into its ions (H+ and Br-) in an aqueous solution.

c) HCH3CO2 (Acetic Acid) - Weak electrolyte: It partially dissociates into its ions (H+ and CH3COO-) in water.

d) CH3OH (Methanol) - Non-electrolyte: It does not dissociate into ions and thus does not conduct electricity in an aqueous solution.

e) H2O (Water) - Non-electrolyte: Although it can act as a weak electrolyte when ionized to a small extent, it is generally considered a non-electrolyte because of its low conductivity.

The correct options for strong electrolytes are a and b, for non-electrolytes are d and e and for weak electrolytes is c.

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Answer:

N₂ + 3H₂ → 2NH3

4Fe + 2Cl₂ → 4FeCl

Explanation:

This equations are now balanced

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Answer:

Mass and volume are two units used to measure objects. Mass is the amount of matter an object contains, while volume is how much space it takes up.

Explanation:

The temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.

To determine the temperature of the gas in Kelvin after its volume is reduced, we can use the combined gas law, which relates the initial and final conditions of pressure, volume, and temperature for a given amount of gas.

The combined gas law equation is:

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

Where P₁ and P₂ are the initial and final pressures, V₁ and V₂ are the initial and final volumes, T₁ is the initial temperature in Kelvin, and T₂ is the final temperature in Kelvin.

Given that the initial volume V₁ is 3,480 mL, the initial temperature T₁ is -70.0 °C (which needs to be converted to Kelvin), and the final volume V₂ is 2,450 mL, we can substitute these values into the equation.

To convert -70.0 °C to Kelvin, we add 273.15 to it, resulting in T₁ = 203.15 K.

Now we can solve for T₂:

(T₂ * V₁) / T₁ = V₂

T₂ = (V₂ * T₁) / V₁ = (2,450 mL * 203.15 K) / 3,480 mL

Simplifying the equation, we find:

T₂ ≈ 143.27 K

Therefore, the temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.

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Answer:

Everyone, this is Ricky. And today we're working on Problem 51 from Chapter 22 and we're gonna determine the number of UNP. Aired electrons for the complex island of CEO seal for minus two I first up, let's determine the charge of art metal ion. So cue is our charge plus four minus one, which is a charge of each chloride ion. The overall charge of minus two Hugh is equal to plus two. I hope this will help

Mothballs in a clothes closet gradually disappear over time, because their components sublime.

Mothballs are small balls of chemical pesticide and deodorant, sometimes used in closets where clothes are susceptible to damage from mold or moths. Mothballs are usually made of naphthalene, 1,4-dichlorobenzene or camphor. What all the compounds have in common is that they sublime at room temperature. Sublimation is a physical change in which matter changes from the solid to the gas state. Once the components are in the gaseous state, the diffuse, and that's why there are no visible remainings over time.

Mothballs in a clothes closet gradually disappear over time, because their components sublime.

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The amount of heat required to raise the temperature of the 34.2 g sample of aluminum by 34 oC is 1043.52 J.

What is Temperature?

Temperature is a measure of the average kinetic energy of the particles in a substance. It is a physical property that determines the direction of heat flow between two objects or systems in contact with each other. Temperature is measured in degrees Celsius (°C) or Fahrenheit (°F), or in kelvin (K) in the International System of Units (SI).

The amount of heat (q) required to raise the temperature of a substance can be calculated using the formula:

q = m x c x ΔT

Where:

m = mass of the substance (in grams)

c = specific heat of the substance (in J/g oC)

ΔT = change in temperature (in oC)

Plugging in the values given:

m = 34.2 g

c = 0.9 J/g oC

ΔT = 34 oC

q = (34.2 g) x (0.9 J/g oC) x (34 oC)

q = 1043.52 J

Therefore, the amount of heat required to raise the temperature of the 34.2 g sample of aluminum by 34 oC is 1043.52 J.

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Answer:

\(2NH_{3 (g)} + 3O_{2 (g)} +2CH_{4 (g)} --> 2HCN_{(aq)} + 6H_{2}O_{(l)}\)

Explanation:

Given that, an experiment to measure the enthalpy change for the reaction of aqueous copper(II) sulfate, CuSO4(aq) and zinc, Zn(s) was carried out in a coffee cup calorimeter; the heat of the reaction in the whole system is calculated to be 2218.34 kJ

Heat of reaction (i.e enthalpy of reaction) is the quantity of heat that is required to be added or removed when a chemical reaction is taken place in order to maintain all of the compounds present at the same temperature.

The formula used to calculate the heat of the reaction can be expressed as follows:

Q = mcΔT

where:

From the information given:

∴

The change in temperature i.e. ΔT = T₂ - T₁

ΔT = 91.5° C - 25° C

ΔT = 66.5° C

The number of moles of CuSO₄ = 1.00 mol/dm³ × 50.0 cm³

\(\mathbf{= (1 \times \dfrac{50}{1000})\ moles}\)

= 0.05 moles

Then;

Using the relation:

\(\mathbf{number \ of \ moles = \dfrac{mass}{molar \ mass}}}\)

By crossing multiplying;

mass of CuSO₄ = number of moles of CuSO₄ ×  molar mass of CuSO₄

mass of CuSO₄ = 0.05 moles  × 159.609 g/moles

mass of CuSO₄ = 7.9805 grams

∴

Using the formula from above:

Q = mcΔT

Q = 7.9805 g × 4.18 kJ/g °C × 66.5° C

Q = 2218.34 kJ

Therefore, we can conclude that the heat of the reaction is 2218.34 kJ

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Explanation:

To solve this question, we use the following formula: M = n/V

where:

n = moles of solute = 3.5

V = volume of the solution = 3.125

M = molarity

So:

M = 3.5/3.125

M = 1.12 mol/L

Answer: M = 1.12 mol/L

When the magnet on the right is moved toward the suspended magnet on the left, a repulsive force between the two magnets causes the suspended magnet to swing to the left; option B

Magnets are materials which exhibit magnetism or produces a magnetic field.

Magnets attract other objects to themselves and these objects are said to be magnetic.

Magnetic objects include metals such as iron.

A magnet has two ends called poles. The poles of a magnet are the North and South pole.

Magnetic lines of forces begin at the North pole whereas magnetic lines of forces end in at the south Pole.

The law of magnetism states that like poles of a magnet repel each other while unlike poles attract.

Considering the given magnets;

the magnet on the right is moved toward the suspended magnet on the left causing the suspended magnet to move to the left means that the end of the magnets repel each other.

This implies that the ends are two similar ends of the magnets.

In conclusion, unlike ends of a magnet attract whereas unlike ends repel.

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Note that the complete question is given below:

The magnet on the right is moved toward the suspended magnet on the left.

Which statement describes the interactions of the magnets in terms of their magnetic fields?

A. A repulsive force between the two magnets causes the suspended magnet to swing to the left.

B. A repulsive force between the two magnets causes the suspended magnet to oscillate like a pendulum.

C. An attractive force between the two magnets causes the suspended magnet to swing to the right.

D. An attractive force between the two magnets cause the suspended magnet to oscillate like a pendulum.

Answer:

9.5 mol

Explanation:

Let's consider the unbalanced equation for the combustion of tetraethyl-lead (IV).

Pb(C₂H₅)₄ + O₂ ⇒ PbO + CO + H₂O

Pb atoms are balanced. We will balance C atoms by multiplying CO by 8.

Pb(C₂H₅)₄ + O₂ ⇒ PbO + 8 CO + H₂O

Then, we will balance H atoms by multiplying H₂O by 10.

Pb(C₂H₅)₄ + O₂ ⇒ PbO + 8 CO + 10 H₂O

Finally, we get the balanced equation by multiplying O₂ by 9.5.

Pb(C₂H₅)₄ + 9.5 O₂ ⇒ PbO + 8 CO + 10 H₂O

All in all, we need 9.5 moles of O₂ to burn 1 mole of Pb(C₂H₅)₄.

Answer:

81mg ÷ 1000 = 0.081g

0.081g ÷ 1.40g/cm3 = 0.058cm3

Explanation:

Firstly convert milligrams to grams. Use the mass to divide the density and find the volume in cm3

In the question, we require a liquid that can be heated & cooled quickly. Therefore, for this purpose, we need a liquid whose value of specific heat capacity is low, it will absorb less amount of heat to get the required change. Hence, option (B)- Low specific heat, is correct.

A heat engine is a system which converts heat into work by taking heat from the reservoir to carry out some work. There is a discharge of some heat to the sink. In this system, there will also be some waste in the form of heat. There are different types of heat engines and a Carnot engine has the maximum efficiency.

The specific heat capacity of any substance is defined as the amount of heat required by one gram of a substance to raise the temperature of that substance by 1 degree Celsius. In the question, we require a liquid that can be heated & cooled quickly, so for this purpose, we need a liquid whose value of specific heat capacity is low, As it will absorb less amount of heat to get the required change.

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Answer:

When the operation of the voltaic cell, which is formed of an aluminum and silver strip takes place, the atom of aluminum loses three of its electrons and the Al3+ formed moves within the solution. The Al3+ ion gets dissolved within the solution and the electrons lost in the process moves through the wire and get acquired by the ions of silver, which then get reduced to solid Ag resulting in the mass gain of silver strip.