Which of the following are examples of plasmas?

Answer:

Cu2 + 2Mg-> 2Cu+ Mg2

Explanation:

Balance the equation and make sure both the reactant and the products are the same

Hope it will be helpful

\(Cu^{+2} + 2Mg\)  -> \(2Cu + Mg^+2\)  is the correct half-reactions.

A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total oxidation numbers is the same for both the reactants and the products.

\(Cu^{+2} + 2Mg\)  -> \(2Cu + Mg^+2\) is the correct half-reactions.

Magnesium is oxidized because its oxidation state increased from 0 to +2 while Cu is reduced because its oxidation state decreased from +2 to 0.

Learn more about balanced equations here:

brainly.com/question/15052184

#SPJ5

Answer:

Lake pontchartrain

Explanation:

Answer:

40,113 years

Explanation:

To find the age of the sample, you need to use the half-life formula:

\(N(t)=N_0(\frac{1}{2})^{t/h\)

In this formula:

------> N(t) = current mass (g)

------> N₀ = initial mass (g)

------> t = time passed (yrs)

------> h = half-life (yrs)

You can plug the given values into the equation and rearrange the formula to find "t".

N(t) = 0.781 g                       t = ? yrs

N₀ = 100 g                           h = 5730 yrs

\(N(t)=N_0(\frac{1}{2})^{t/h\)                                           <----- Half-life formula

\(0.781=100(\frac{1}{2})^{t/5730}\)                                     <----- Insert values

\(0.00781=(\frac{1}{2})^{t/5730}\)                                       <----- Divide both sides by 100

\(log_{1/2}(0.00781)=log_{1/2}((\frac{1}{2})^ {t/5730})\)               <----- Take \(log_{1/2}\) of both sides

\(7.00 = \frac{t}{5730}\)                                                   <----- Solve \(log_{1/2}\)

\(40,113 = t\)                                                   <----- Multiply both sides by 5730

The given sample is 40,113 years .

Half-life, in radioactivity, is the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay.

Half-life formula,

\(\rm N(t)\;=N_0(\dfrac{1}{2})^\frac{t}{t1/2}\)   .......(1)

where,

N(t)=current mass

N₀=initial mass

t=time period

h=half -life

Given,

N(t)=0.781g, t=? yrs, N₀=100g, h=5730 years

\(\rm N(t)\;=N_0(\dfrac{1}{2})^\frac{t}{t1/2}\)

put the values, in ......(1)

0.781=100(1/2) \(t/5730\\\)

log₁/₂(0.00781)=log₁/₂ ( 1/2)\(t/5730\)

7=t/5730

40,113=t

Hence, the given sample is 40,113 years .

Learn more about half-life ,here:

https://brainly.com/question/16387602

#SPJ1

Answer:

Exposed surface area

Explanation:

The powdered calcium carbonate will react faster with hydrochloric acid than calcium carbonate chips due to the exposed surface area.

Powdered calcium carbonate has a larger surface area compared to the chips. And, the larger the surface area exposed on a body, the faster the reaction it will undergo.

For the same masses of a solid substance, the smaller the particle size of each form, the larger the surface area exposed to reaction.

The surface area exposed proportionally affects the rate of reaction.

Answer:

It was deflected by a magnet charged particles

Answer: The concentration(molarity) of the solution will be 1.35 X10-4 M

Explanation: Molarity is defined as number of moles of solute present in one litre of any solution.

Mathematically,

Molarity= no of moles of solute/volume of solution(in liters)

M=N/V(liters)

Also upon dilution the number of moles of the solution remain unchanged

Therefore initial no of moles(before dilution)= final no of moles(after dilution)

M1V1=M2V2

According to the question,

Molarity of Na2S04 before dilution(M1)=1.5 M

Volume of NA2SO4(V1)=45 mL

Molarity of Na2S04 after dilution(M2)=x M

Volume of Na2S04(V2)=500 mL

x=M1V1/V2

=1.5X45/500

=0.135 M =1.35 X10-4 M

For dilution concept, refer-

https://brainly.in/question/11390951

Answer:

403.2 grams of oxygen

Explanation:

According to the balanced chemical equation, 2C2H6 + 7O2 —> 4CO2 + 6H2O, 4 moles of carbon dioxide (CO2) are produced for every 7 moles of oxygen (O2) that react. Therefore, if 7.2 moles of carbon dioxide are produced, the number of moles of oxygen that react is (7.2 moles CO2) * (7 moles O2 / 4 moles CO2) = 12.6 moles O2.

Since the molar mass of oxygen is approximately 32 g/mol, the mass of oxygen that reacts is (12.6 moles O2) * (32 g/mol) = 403.2 g. Therefore, 403.2 grams of oxygen react in order to produce 7.2 moles of carbon dioxide.

Explanation:

2Na+O2=2N2Ois balanced one

The number of lithium, Li atoms in 4.5 moles of lithium, Li is 2.7×10²⁴ atoms

1 mole of Li = 6.02×10²³ atoms

From Avogadro's hypothesis given above,

1 mole of Li = 6.02×10²³ atoms

Therefore,

4.5 moles of Li = 4.5 × 6.02×10²³

4.5 moles of Li = 2.7×10²⁴ atoms

Thus, we can conclude that 2.7×10²⁴ atoms are present in 4.5 moles of lithium.

Learn more about Avogadro's number:

https://brainly.com/question/26141731

29 is not the best answer depends on the context and the rules for significant figures.

What is best answer?

The best answer depends on the context and the rules for significant figures. If we assume that we need to round to three significant figures:

Therefore, 29 is not the best answer.

To know more about significant figures, visit:

https://brainly.com/question/30465808

#SPJ1

Answer:

C. The electrostatic force is stronger than the gravitational force

between Earth and your hair

Explanation:

Electrostatic forces are extremely strong. When your hair becomes charged from the electrons, it causes the strands of your hair to repel (push away) from each other because they have like (the same) charges.

Answer:

36704 $

Explanation:

First we calculate how much the worker gets paid in one week:

Then we calculate how many weeks does the worker work in 1.7 years:

Finally we calculate how much does the worker make in 1.7 years:

The electron configuration of the K+ ion is 1s22s22p63s23p6.

One orbital can accommodate a maximum of two electrons and comes in four different shapes: s, p, d, and f. Because they contain various sublevels, the p, d, and f orbitals may each hold more electrons. According to what was said, each element's position on the periodic table determines how its electrons are configured.

Potassium (K) has a complete electron configuration of 1s22s22p63s23p64s1. [Ar]4s1 is an acronym for the electron configuration of argon (Ar), plus one additional electron in the 4s orbital. The 18 electrons in argon. For 19 electrons of potassium, one more electron configuration completes the picture.

To know more about electron configuration visit:-

https://brainly.com/question/29757010

#SPJ4

Answer:

b. in the middle

Explanation:

your answer choice is correct!

Answer:

Metalloids are a group of their own because they can have properties of both metals and non-metals.

Explanation:

Answer:

Their characteristics and behavior on different temperatures.

Explanation:

Metalloids weren't considered as metals although they have similar characteristics because metalloids have non metal characteristics too.

some act as either metal or non metal when reacted with elements

The given unit conversions for the mass and length are as follows:

a. 0.765 g = 0.000765 kg

b. 1.34 g = 1340

c. 34.2 mg = 0.0342 g

d. 23 745 kg = 2.3745 * 10⁹ mg

2. a. 17.3 m = 17300 cm

b. 2.56 m = 0.00256 km

c. 567 dm = 56.7 m

d. 5.13 m = 5130 m

3. The shortest length is 0.0128 km and the longest length is 1583 cm

The mass of an object is the amount of matter present in the substance.

The mass of objects is measured using a chemical balance, the unit of measurement is kilograms.

The various units can be interconverted.

To convert each of the following masses to the units requested, the conversion factor is used;

a. 0.765 g to kilograms

0.765 g = 0.765/ 1000

0.765 g = 0.000765 kg

b. 1.34 g to milligrams

1.34 g = 1.34 * 1000

1.34 g = 1340

c. 34.2 mg to grams

34.2 mg = 34.2 / 1000

34.2 mg = 0.0342 g

d. 23 745 kg to milligrams

23 745 kg = 23 745 * 10⁶

23 745 kg = 2.3745 * 10⁹ mg

2. To convert each of the following lengths to the units requested, the steps are as follows:

a. 17.3 m to centimeters

17.3 * 100 cm

17.3 m = 17300 cm

b. 2.56 m to kilometers

2.56 m = 2.56/ 1000

2.56 m = 0.00256 km

c. 567 dm to meters

567 dm = 567 / 10

567 dm = 56.7 m

d. 5.13 m to millimeters

5.13 m = 5.13 * 1000

5.13 m = 5130 m

3. Converting the following lengths to meters:

1583 cm = 15.83 m

0.0128 km = 12.8 m

17 931 mm = 17.931 m

14 m

The shortest length is 0.0128 km and the longest length is 1583 cm

Learn more about length and mass at: https://brainly.com/question/18270472

#SPJ1

Using the prefix method for covalent compounds, the names of the given compounds are shown below:

LIF: Lithium fluoride

Cl2O7: Dichlorine heptoxide

N2O3: Dinitrogen trioxide

SF6: Sulfur hexafluoride

Na3PO4: Sodium phosphate

A covalent bond is  described as a chemical bond that involves the sharing of electrons to form electron pairs between atoms.

The properties of covalent compounds includes:

Learn more about covalent compounds at:

https://brainly.com/question/3447218

#SPJ1

This is the answer: There have been changes in Earth's life forms over time.

2.65g/ml is the density of a piece of granite whose volume is 20 mL and mass is 53grams. Density is the mass of a specific material per unit volume.

Density is the mass of a specific material per unit volume. Density is defined as d = M/V, in which d represents density, M is weight, as well as V is volume. Density is generally expressed in grams every cubic centimetre. Water, for example, has a density of 1 gram per square centimeter, but Earth has a density of 5.51 kilograms per cubic centimetre.

Density is sometimes measured in kilos per cubic centimeter (in metre-kilogram-second or SI units). The density of air, for example, is 1.2 kilos per cubic metre. 

density = mass / volume

            =53/ 20

            =2.65g/ml

Therefore, 2.65g/ml is the density of a piece of granite whose volume is 20 mL and mass is 53grams.

To learn more about density, here:

https://brainly.com/question/13434141

#SPJ1

Answer:

Explanation:

Structural isomer is a type of isomer in which molecules with the same molecular formula have different bonding patterns and atomic organization.

For example Pentan-1-ol, pentan-2-ol, and pentan-3-ol are structural isomers that exhibit position isomerism.

Cyclohexane and hex-1-ene are examples of functional group structural isomers.

Answer:

198.2 g/mol

Explanation:

C = 12.01 g/mol

H = 1.01 g/mol

N = 14.01 g/mol

O = 16.00 g/mol

(12.01 x 8) + (10 x 1.01) + (14.01 x 2) + (16.00 x 4) = 198.12 g/mol

An exothermic reaction releases 325 kJ. 1359.8 kJ energy is this in calories.

An exothermic reaction is a chemical reaction that releases heat energy into the surroundings. During an exothermic reaction, the products of the reaction have less potential energy than the reactants, and the excess energy is released in the form of heat.

One calorie is defined as the amount of energy required to raise the temperature of one gram of water by one degree Celsius.

One joule is defined as the amount of energy required to apply a force of one newton over a distance of one meter.

1 cal = 4.184 J

1 cal = 0.004184 kJ

325000 cal = x kJ

0.004184/ 1 = x / 325000

x = 1359.8 kJ

Thus, 1359.8 kJ energy is this in calories.

To learn more about an exothermic reaction, follow the link;

brainly.com/question/10373907

#SPJ1

Answer:

The correct option is (3).

Explanation:

The ideal gas equation is given by :

\(PV=nRT\\\\V=\dfrac{nRT}{P}\)

The pressure of ideal gas is directly proportional to temperature and inversely proportional to its volume.

We can say that the volume of a 1.00-mole sample of an ideal gas will decrease when the pressure increases and the temperature decreases.

The volume of the idea gas decrease when pressure increases and the temperature decreases. Thus option C is correct.

The ideal gas equation can be given as:

PV = nRT

The equation in terms of pressure and temperature when n=1 can be written as:

Volume = \(\rm \dfrac{RT}{P}\)

Accordingly, the volume has been directly proportional to the temperature and has been inversely proportional to the pressure.

Thus, with the decrease in volume, there has been an increase in pressure and a decrease in temperature.

Thus, option C is correct.

For more information about the ideal gas, refer to the link:

https://brainly.com/question/8711877

The Punnet's square result shows that the genotype ratio of the offspring would be 50% Ss and 50% Ss.

The cross involves 2 sheep with genotypes of ss and Ss respectively. The allele S codes for white wool and is dominant over allele s which codes for spotted wool.

Crossing the two sheep:

   Ss    x    ss

 Ss   Ss   ss   ss

Genotype ratio: 1Ss:1ss

Phenotype ratio: 50% white wool and 50% spotted wool.

The result of Punnet's square analysis is shown in the attached image.

More on Punnet's square can be found here:https://brainly.com/question/16975988

#SPJ1

The amount of carbondioxide that will be produced if 1.3L is combusted is 3.9L (option B).

Stoichiometry refers to the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

According to this question, propane gets combusted in air to produce carbondioxide and water as follows:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

Based on the above equation, 1 mole of propane produces 3 moles of carbondioxide.

This suggests that 1.3L of propane will produce 3.9L of carbondioxide.

Learn more about stoichiometry at: https://brainly.com/question/29775083

#SPJ1

Physical methods include monitoring temperature, pressure, and color change. Chemical methods include titration and gas analysis.

Monitoring the rate of chemical reactions is important to understand the kinetics of the reaction and optimize the reaction conditions. Physical and chemical methods are used for this purpose.

Physical methods include measuring the change in temperature, volume, and pressure of the reactants and products with time. The rate of reaction can be calculated from the rate of change of these parameters.

Chemical methods include monitoring the concentration of reactants and products with time. This can be done by techniques such as spectroscopy, chromatography, and electrochemistry. These methods are often more accurate and precise than physical methods.

Learn more about chemical reaction, here:

https://brainly.com/question/29039149

#SPJ2

There are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.

To determine the number of moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3, we need to consider the stoichiometry of the compound.

The formula of aluminum sulfate (Al2(SO4)3) indicates that for every 1 mole of the compound, there are 2 moles of aluminum ions (Al3+). This means that the mole ratio of Al3+ to Al2(SO4)3 is 2:1.

Given that we have 0.42 mol of Al2(SO4)3, we can calculate the moles of Al3+ as follows:

Moles of Al3+ = 0.42 mol Al2(SO4)3 x (2 mol Al3+ / 1 mol Al2(SO4)3)

Moles of Al3+ = 0.42 mol Al2(SO4)3 x 2

Moles of Al3+ = 0.84 mol Al3+

Therefore, there are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.

It's important to note that the stoichiometry of the compound determines the mole ratio between the different species involved in the chemical formula. In this case, the 2:1 ratio of Al3+ to Al2(SO4)3 allows us to determine the number of moles of Al3+ based on the given amount of Al2(SO4)3.

For more such question on aluminum visit:

https://brainly.com/question/30451292

#SPJ8

Answer:

physical

Explanation:

Answer:

D.) State the question, form a hypothesis, conduct an experiment

Explanation:

https://www.colorincolorado.org/article/steps-scientific-process