Can y’all help with question 17

Can Yall Help With Question 17

Answers

Answer 1

Answer:

7. Option 2. Atom 1 and Atom 4

8. The same number of valence electron

Explanation:

7. Determination of which symbol represent an isotope.

Isotopes are atoms having the same atomic number but different mass number due to the difference in the neutron number.

From the question given above, the following were obtained:

Z => atomic number

A => mass number

Atom >>> Isotope >>>>> Z >>>> A

1 >>>>>>> ¹⁷₇E >>>>>>>> 7 >>>> 17

2 >>>>>>> ¹⁷₈E >>>>>>> 8 >>>> 17

3 >>>>>>> ¹⁸₆E >>>>>>> 6 >>>> 18

4 >>>>>>> ¹⁸₇E >>>>>>> 7 >>>> 18

From the table above, only atom 1 and 4 has the same atomic number. Hence, atom 1 and atom 4 are isotopes.

8. To know the correct answer to the question, we shall write the electronic configuration of magnesium and calcium. This can be obtained as follow:

Mg (12) => 1s² 2s²2p⁶ 3s²

Valence electron => 2

Ca (20) => 1s² 2s²2p⁶ 3s²3p⁶ 4s²

Valence electron => 2

We can see that magnesium and calcium both have the same valence electron. Hence, they will have similar chemical properties.


Related Questions

22. Which statement describes the likely metabolic impact of cyanide
production on clover plants?
M. Cyanide is nontoxic to clover plants because they produce ATP without
the electron transport in the mitochondria.
P. Cyanide is toxic to clover plants because they use cytochrome c oxidase
for electron transport in the mitochondria.
R. Cyanide is toxic to clover plants because they use cytochrome c oxidase
for ATP synthesis in the chloroplasts.
s. Cyanide is nontoxic to clover plants because they carry out electron
transport in chloroplasts rather than in mitochondria.

Answers

Answer:

M

Explanation:

Hope it helped u alot

P. Cyanide is toxic to clover plants because they use cytochrome c oxidase for electron transport in the mitochondria.

The correct option is B.

Where is cyanide found?

Various bacteria, fungi, and algae have the ability to produce cyanides. Tapioca, spinach, willow shoots, almonds, string beans, fruit seeds, and car fumes are other items that contain cyanides.

What goods include cyanide?

Smoking cigarettes and the byproducts of the combustion of synthetic fibers, including plastics, contain cyanide. Combustion products are chemicals that are released while combustion. The paper production, textiles, and plastics all use cyanide. The chemicals used it to develop pictures include it. Unfortunately, cyanide is not like other materials. By utilizing this approach, you simply cannot develop a natural tolerance to cyanide.

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The complete question is -

Which statement describes the likely metabolic impact of cyanide

production on clover plants?

A-M. Cyanide is nontoxic to clover plants because they produce ATP without the electron transport in the mitochondria.

B-P. Cyanide is toxic to clover plants because they use cytochrome c oxidase for electron transport in the mitochondria.

C-R. Cyanide is toxic to clover plants because they use cytochrome c oxidase for ATP synthesis in the chloroplasts.

D-S. Cyanide is nontoxic to clover plants because they carry out electron

transport in chloroplasts rather than in mitochondria.

The initial temperature of a reaction is 24.7 °C. The temperature decreases by 3.2 °C. What is the new temperature of the reaction? Someone help

Answers

Answer:

I think it's 21.5 *C

Explanation:

2. All metals are good conductors because their electrons can
move easily through the metal.
What do you think will be true about electrons in an insulator?

Help me please
This is for my science homework

Answers

Answer: An insulator would be made out of material unable to conduct electricity due to lack of fluid movement for electrons, such as rubber. Rubber properties not only prevents them from freely moving, but also helps electrons stay tightly bound to each other.

Hope this helps ^_^


I need the answer by 12❤️

Answers

Answer:

answer number 3? ac

Explanation:

An object has an actual mass of 34.85 grams. Johnny measures the object to have a mass of 35 grams after rounding. What is Johnny's percent error of the object?

Answers

Answer:

1.15.........................

You're provided a 0.50 M solution of HCl. How many moles of HCl are present in 25 ml of this solution? ​

Answers

Answer:

0.0125 moles of HCl

Explanation:

(0.50 mol/L)(0.025 L) = 0.0125 moles of HCl

PLEASE HELP!

See picture

Answers

Answer:

See Explanation

Explanation:

The equation of the reaction;

KHSO4(aq) + KOH(aq) -------> K2SO4(aq) + H2O(l)

Number of moles of KHSO4 = 49.6 g/136.169 g/mol = 0.36 moles

Since the reaction is in a mole ratio of 1:1, 0.36 moles of K2SO4 is produced.

Number of moles of KOH = 25.3 g/56.1056 g/mol = 0.45 moles

Since the reaction is 1:1, 0.45 moles of K2SO4 is produced

Hence K2SO4 is the limiting reactant.

Mass of K2SO4 formed = 0.36 moles of K2SO4 * 174.26 g/mol = 62.7 g

So;

1 mole of KHSO4 reacts with 1 mole of KOH

0.36 moles of KHSO4 reacts with 0.36 * 1/1 = 0.36 moles of KOH

Amount of excess KOH = 0.45 moles - 0.36 moles = 0.09 moles

Mass of excess KOH = 0.09 moles * 56.1056 g/mol  = 5 g of excess KOH

What is the concentration of a solution made by dissolving 0.99mol of acetic acid in enough water to make 0.58L of solution?

Answers

Answer:

[CH₃COOH] = 1.70 M

Explanation:

When we talk about concentration we can determine Molarity

Molarity determines the moles of solute that are contained in 1L of solution.

In this case our solute is the acetic acid.

M = mol/L

M = 0.99 mol /0.58L → 1.70 M

We can also make a rule of three

In 0.58 L of solution we have 0.99 moles of solute

In 1 L of solution we may have (1 . 0.99) / 0.58 = 1.70 moles

Acetic acid is a weak acid, partially dissociated in water.

CH₃COOH  +  H₂O  ⇄  CH₃COO⁻  +  H₃O⁺     Ka

Help please !!!!!!!!!!!!

Answers

the answer to your question is a increase

The tapir and agouti are ___________ found in the Amazon Rainforest.
A.Carnivores
B.Omnivores
C. Herbivores
D. Decomposers
"science"

Answers

The tapir and agouti are herbivores found in the Amazon rainforest
C

How many grams are in 5.4 moles of K2SO4

Answers

Answer:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles K2SO4, or 174.2592 grams.

Explanation:

The potassium sulphate( [tex]K_{2} SO_{4}[/tex] )contain 940.95 gram in 5.4 moles.

What is mole?

A mole is described as the quantity of a material that includes precisely 6.02214076 X [tex]10^{23}[/tex] of the substance's elementary constituents.

Given data:

Mole = 5.4

Molar mass = 174.25 g/mol

Mass = ?

Mole can be calculated by using the formula:

Mole = mass / molar mass

Put the value of given data in above equation.

Mass = Mole × molar mass

Mass = 5.4 mole × 174.25 g/mol

Mass = 940.95 gram

Therefore, there are 940.95 gram in [tex]K_{2} SO_{4}[/tex]

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How many hydrogen atoms are present in an alkene with 7 carbon atoms.

Answers

I think it’s 16.... could be wrong

Balance and indicate what type of reaction

C6H12 + O2 → CO2 + H2O

Answers

C6H12 + 9O2 → 6CO2 + 6H2O

This is a Combustion Reaction

Balanced equation is [tex]C_6H_{12}[/tex] + [tex]9O_2[/tex] → [tex]6CO_2[/tex] + [tex]6H_2O[/tex].

What is the balanced equation?

A balanced chemical equation occurs when the number of the atoms involved on the reactants side is equal to the number of atoms on the products side.

Balanced equation is [tex]C_6H_{12}[/tex] + [tex]9O_2[/tex] → [tex]6CO_2[/tex] + [tex]6H_2O[/tex]. Where there are 6 carbon atoms, 18 oxygen atoms, and 12 hydrogen atoms.

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HELP!!!!!What is the molar mass of a gas which has a density of .249 g/L at 20.0 degrees Celsius and a pressure of .95 atm?

Answers

Answer:

6.31g/mol

Explanation:

Using the ideal gas equation;

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

Mole (n) = mass (m)/molar mass (Mm)

* Mm = m/n

Also, density (p) = mass (m) ÷ volume (V)

PV = nRT

Since n = M/Mm

PV = M/Mm. RT

PV × Mm = m × RT

Divide both sides by V

P × Mm = m/V × RT

Since p = m/V

P × Mm = p × RT

Mm = p × RT/P

Mm = 0.249 × 0.0821 × 293/0.95

Mm = 5.989 ÷ 0.95

Mm = 6.31g/mol

Please help I will mark you brainiest
What are one advantage and one disadvantage of sexual reproduction?
What is one advantage and one disadvantage of asexual reproduction?

Answers

Answer:asexual- Energy is not required to find a mate. Offspring are genetic clones. A negative mutation can make asexually produced organisms susceptible to disease and can destroy large numbers of offspring. Some methods of asexual reproduction produce offspring that are close together and compete for food and space.

Explanation:During sexual reproduction the genetic material of two individuals is combined to produce genetically diverse offspring that differ from their parents.

If 3 moles of Mg were reacted, how many moles of
0, were also reacted?
2 Mg + O2 → 2 Mgo

Answers

Chu papi 02 806 mpg 2mg

Lana balanced an equation so that the result was 2C2H3Br + 5O2 → 4CO2 + 2H2O + 2HBr. Which most likely represents the starting equation?

Answers

Answer:

C2H3Br + O2 → CO2 + H2O + HBr

Explanation:

The term balancing of chemical reaction equation has a unique meaning in chemistry. What it actually means is to ensure that the number of atoms of each element on the left hand side of reaction equation becomes equal to the number of atoms of the same element on the right hand side of the reaction equation.

When we look at the equation; C2H3Br + O2 → CO2 + H2O + HBr, the number of atoms of each element on the left and right hand sides of the given equation are not the same hence the equation is unbalanced.

If we look at the equation; 2C2H3Br + 5O2 → 4CO2 + 2H2O + 2HBr, the number of atoms of each element on both sides of the reaction equation are now equal, thus the later equation is the balanced version of the former.

Answer:

C2H3Br + O2 → CO2 + H2O + HBr

Explanation:

Does the half life of oxygen-18 impacts its use ( explain)

Answers

Answer:

O-18 is used as a tracer in many hydrologic studies. It is most often used as a component in a mixing-model and hydrograph separation, as O-18 acts conservatively and is applied naturally and uniformly over broad areas. O-18 can be used when different sources (old water/new water) have different isotopic values.

Convert 623g of Fe to grams

Answers

Answer: The answer is 11.15587787626466 or rounded up it will be 11.2 mol.

Explanation: By converting Grams of any element it will be in moles which is grams in philosiphical terms. But by converting Fe(or iron) It is called a Convertment of measurement units.

Explain the Anchoring Phenomenon (summary)

Answers

An anchoring phenomenon anchors all of the learning within a unit. So, it is a unit level event that the classroom is trying to make sense of as they engage in a series of lessons.

Since the questions the students ask about the anchor drive the learning within the unit, the anchor should be complex and require an understanding of several big science ideas to explain.

At strategic moments, the class revisits the anchoring phenomenon to review their initial questions to see which they have answered, which they are making progress on, and what new questions they may have to help us continue learning about the phenomenon.

Throughout the unit, the classroom and each student should be given opportunities to share their thinking and how it relates to the anchoring phenomenon.
YOU SHOULD PUT IT IN YOUR OWN WORDS THOUGH <3

Determine the number of atoms that are in 1.15 mol of Cl 2.

Answers

Answer:

Explanation: I think its 4.91 x 10^25. Im not very sure, i just multipled 1.15 mol by the molar mass of Cl 2, which was 70.9 g. Then I multiplied that by avogadro's number. sorry if im wrong

Which description applies to all atoms of an element? flammable visible under a microscope different alike

Answers

Answer:

I think its alike.... Pretty sure actually

What are the materials that good conductors and insulators?​

Answers

Conductors

Silver

Gold

Copper

Aluminum

Mercury

Steel

Iron

Seawater

Concrete

Mercury

___________________

insulators

Aluminum foil

Glass

Air

Plastic

Rubber

Porcelain

Wood

6. This means that the relationship between amplitude and wavelength is
a. direct
b. inverse
C. not related

Answers

Answer:

Explanation:

a. direct

Amplitude and wavelength are the property of the waves. These both are directly related to each other. Thus, option A is correct.

What are wavelength and amplitude?

Amplitude is the measure of the wavelength that is estimated from the peak or crest to the trough of the wave. Wavelength is the measurement of the length of the wave from one peak to the crest of another wave.

Though there is no relationship between the wavelength and amplitude of the waves they can be said to have direct relation as wavelength and frequency are indirectly related.

Therefore, option A. direct relation is correct.

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what happens to the food as it undergoes this stage​

Answers

The first step in the digestive process happens before we even taste food. Just by smelling that homemade apple pie or thinking about how delicious that ripe tomato is going to be, you start salivating — and the digestive process begins in preparation for that first bite.

Almost all animals have a tube-type digestive system in which food:

enters the mouth

passes through a long tube

exits the body as feces (poop) through the anus

Along the way, food is broken down into tiny molecules so that the body can absorb nutrients it needs:

Protein must be broken down into amino acids.

Starches break down into simple sugars.

Fats break down into into fatty acids and glycerol.

You place new batteries in your flashlight. After taking off, you find it does not work anymore. What might have gone wrong?

Answers

you put the batteries in incorrectly

given a mixture of lead to oxide ammonium chloride and sodium chloride describe how a mixture can be separated to obtain a sample each​

Answers

Answer:

There are way in separating mixtures of chloride salts such as that of sodium chloride and ammonium chloride. It can be done by crystallization, filtration, and sublimation. The easiest method among the three is separation by sublimation.

how does H3O+ and OH- relate to acids, bases, and the pH scale?​

Answers

Answer:

For pure water, the values of [H3O+] and [OH-] are equal and thus their values are both 1.0 x 10-7. If there is an equal amount of acid and base present in any solution, the solution is called "neutral" and the pH of the solution is 7. ... The sum of the pH and pOH must always equal 14.

Explanation:

help me get this right no links

Answers

Answer:

D

Explanation:

Because the Earth rotates through two tidal “bulges” every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes!!!

11. What is the force between two electrons

Answers

Answer:

The attractive force between the electrons and the nucleus is called the electric force.

Explanation:

Answer:

Electric force

Explanation:

The attractive force between the electrons and the nucleus is called the electric force.Experiments have shown that the electric force between two objects is proportional to the inverse square of the distance between the two objects.

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