Hi!
Can sportive help me with this pls, I’m really bad at chemistry…
I hope someone helps! Have a nice day !

Answer:

See below

Explanation:

I do not know the 'calculation ' to find this answer....you should just look at the periodic table of elements

U =  238.02 gm /mole

Mg = 24.305 gm/mole

Does the question want you to weigh out protons neutrons and electrons?

Zambrano thinks that  renewable energy science is a good choice for a career it  reproduciable and eco friendly

Renewable energy science  can be defined as the study of the various types of energy that can be reproduced even after been deplited.

Examples of renewable energy is the Solar, Wind, Geothermal Enegy etc.

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This Is the sample response on edge:

There will many opportunities in the field of renewable energy science and engineering. It is an exciting field, with a lot of variety and room for new ideas.

- Have it on edge, Have a good day :)

The amount of nickel that would be electroplated by passing a constant current of 7.2 A through a solution of NiSO₄ for 90 min is 11.83g.

Equivalent mass of any substance will be electroplated by 96485 coloumb of charge.

Equivalent mass of Ni in NiSO₄ = 58.7/2 = 29.35g

So that 96485 coloumb of charge = deposited 29.35g of Ni

Also charge will be calculated by usimg the below equation as:

Q = (I)(t), where

I = current = 7.2 ampere

t = time = 90 min = 5400 sec

Q = (7.2)(5400) = 38,880 coloumb

By using both the equations of coloumb, we calculate the grams of Ni electroplated by 38,880 coloumb charge as:

Mass of Ni = (29.35g)(38,880/96,485)

Mass = 11.826 grams = 11.83g

Hence required mass of nickle is 11.83 grams.

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Answer:

Prosthetic Devices

Explanation:

I’m a genius and it’s the answer :D

Assuming the quantity of current passing through the zinc and copper electrolytes is the same, mass of Zinc deposited is (x/64) × 65.0 g.

Electrolysis is the decomposition of a substance known as an electrolyte when electric current is passed through its solution or molten form.

The mass of an electrolyte deposited when current is passed is dependent on the current and the charge on the ion.

In the electrolysis of copper and zinc, assuming the quantity of current passed through their solution are the same, the moles of each zinc and copper deposited will be the same since the charges on their ions are the same.

Assuming x g of copper is deposited.

molar mass of copper = 64.0 g

molar mass of Zinc = 65.0 g

moles of copper deposited = x/64

moles of zinc deposited = x/64

mass of Zinc deposited = (x/64) × 65.0 g

Therefore, the mass of Zinc deposited is (x/64) × 65.0 g.

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last one? don't take my word though

Explanation:

the suns heat is related to nuclear fusion

Answer: 2.36 moles

Explanation:

Using 1 g/mol for the atomic mass of hydrogen and 16 g/mol for the atomic mass of oxygen, we get that the gram-formula mass of water is 1(2)+16=18 g/mol. Thus, 42.5 grams of water is the same as 2.36 moles.

From the reaction, we know that for every 2 moles of water produced, 2 moles of dihydridotin are consumed. In each mole of dihydridotin, there is 1 mole of hydrogen, meaning that 2 moles of hydrogen are consumed.

Thus, the answer is 2.36 moles.

Answer:

B . a tissue

Explanation:

Answer:

plants animals bacteria

Answer:select and control     A. interpreting the results

Explanation:

Answer: 1650 hope i got it in time.

Explanation:

Answer:

C

1650

Explanation:

Verified Answers With Verified Results

Answer:

2.5 kilo calories

Explanation:

1 Calories = 0.001 Kilocalories

10 Calories = 0.01

Kilocalories 2500

Calories = 2.5 Kilocalories

Answer:

2.5 kilocalories.

Explanation:

2500 divided by 100 to get to kilo is 2.5

Answer:

John Dalton

Explanation:

John Dalton (1766-1844) is the scientist credited for proposing the atomic theory. This theory explains several concepts that are relevant in the observable world.

Nuclear properties. Isotopes of the transuranium elements are radioactive in the usual ways: they decay by emitting alpha particles, beta particles, and gamma rays; and they also fission spontaneously. The table lists significant nuclear properties of certain isotopes that are useful for chemical studies.          

hope this helps

17.93 grams of oxygen gas occupy 12.3L of space at 109.4 kPa and 15.4°C. Details about how to calculate mass can be found below.

The mass of a given gas can be calculated by multiplying the number of moles of the substance by its molar mass.

However, the number of moles of the gas must be calculated first as follows:

PV = nRT

Where;

1.079 × 12.3 = n × 0.0821 × 288.4

13.27 = 23.68n

n = 13.27/23.68

n = 0.56mol

Mass = 0.56 × 32

mass of oxygen gas = 17.93g

Therefore, 17.93 grams of oxygen gas occupy 12.3L of space at 109.4 kPa and 15.4°C.

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Answer:

It contains lonic crystals

Explanation:

the specific heat capacity is the energy needed to raise the temperature of 1kg of that substance by 1 degree

Answer:

The Fox is at the top of the food chain; so, the other animals could increase in population and the fox could return

Moderate drought is an illustration of a shift that the prairie ecosystem was able to adapt to and return to balance. The amount of water that is accessible to both plants and animals reduces during a drought, which affects both plant development and the number of herbivores.

A forest ecosystem can recover from fire because diverse creatures play distinct functions in various ways and locations. Many species' dispersed habitats enable them to resprout or grow from seeds that are ignited by fire, protecting populations from being entirely wiped off.

Ecosystems are living things that are susceptible to a wide range of abiotic and biotic perturbations brought on by the forces of nature and/or human activities.

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You can use lemon or lime juice as a 1 to 1 replacement for vinegar in egg dye recipes.

For example, if the recipe calls for 1 teaspoon (4.9 mL) of vinegar, use 1 teaspoon (4.9 mL) of lemon or lime juice.

You can use fresh or bottled lemon or lime juice. Both will work the same way.

Hope this helps :))

Answer:

Fatty acid is considered unsaturated if it contains at least one double bond. It is called monounsaturated if it contains one double bond and polyunsaturated if it contains more than one double bond.

Explanation:

i hope i helped you

Consider the N₂ gas produced:

Pressure, P = 1.2 atm

Volume, V = 16 L

Gas constant, R = 0.08206 L atm / (mol K)

Temperature, T = (273 + 23) K = 296 K

Gas law: PV = nRT

Then, n = PV/(RT)

No. of moles of N₂, n

= 1.2 × 16 / (0.08206 × 300)

= 0.79 mol

According to the given equation, mole ratio Cl₂ :

N₂ = 3 : 1

No. of moles of Cl₂ needed 

= (0.79 mol) × 3

= 2.37 mol

Mass of Cl₂ needed 

= (2.37 mol) × (35.5 × 2 g/mol) 

= 168 g

Answer:

Description. Dietary fiber is mostly derived from the plant cell wall. It mainly includes cellulose, hemicellulose, pectic polysaccharides, oligosaccharides, resistant starch, and lignin.

Explanation:

I hope help you and thanks for heart and rate my answer

Answer:

1.48×10²⁴ Cu atoms

Explanation:

For this question you need to use Avogadro's number 6.022×10²³atoms.

2.45 moles of Cu ×[tex]\frac{6.022x10x^{23} atoms }{1 mole}[/tex]= 1.47539×10²⁴ atoms.

The moles cancel out so you are left with atoms.

Since there are 3 significant figures in the question there should be 3 significant figures in your answer, which is 1.48×10²⁴ Cu atoms.

Answer:

k

br-

o2- ion

Explanation:

a/k ion has a larger size than k+ ion bc of the size of the radius it is always smaller compared to the parent ion .

b/bc it is an anion and it always has a large size compared to the parent ion (the same thing as the first one)

c/both the anions are isoelectornic species .Since the nuclear charge of O2- ions is small,its size is therefore more than the F- ion

Answer:

Elctromagnetic waves can travel through empty space.

Explanation:

Waves that may pass through matter or empty space are known as electromagnetic waves. The electromagnetic field, like the other basic fields, penetrates the whole universe, including the region we refer to as empty space. There are no fields in space. The medium through which electromagnetic waves travel is called the electromagnetic field.

Answer:

High Polarity

Lower Density Of Ice The reason icebergs are floating on the sea surface is because of this lower density. ...

High Heat Of Evaporation When water starts evaporating off of a surface, it creates an effect of cooling. ...

High Specific Heat Water manages to stay liquid because of two of its properties, high specific heat, and its high heat of vaporization. ...

Attraction To Other Polar Molecules The property of cohesion allows liquid water to have no tension on the surface.

Explanation:

Answer:

Rate will double

Explanation:

Since the concentration of A is doubling the rate of reaction will also double, since in this scenario concentration is proportional to rate of reaction. So if the concentration of A were to triple the rate of reaction would also triple.