What has more particles: a mole of hydrogen or a mole of uranium?

Answers

Answer 1

Answer

hydrogen

Explanation:


Related Questions

Kingdom:

Domain:

I am made of many cells. My cells have

an organized nucleus, I have two

parents and eat food.

Guess Who?

please help

Answers

Answer:

SORRY IM LATE! at least i saw it.

Explanation:

Kingdom is Eucaryota

domain is eucarya

As atoms get smaller,valance electrons are getting closer or farther away?

Answers

Answer:

valence electrons get closer but rest of them are remain same

They are getting closer and the force of attraction is getting weaker

One group of students is investigating the properties of the bar magnet shown below.
Bar magnet

The students' observations are listed below.

When an iron nail is taken near the North Pole (N) of the bar magnet, it is pulled towards the magnet.
When an iron nail is taken near the South Pole (S) of the bar magnet, it is pulled towards the magnet.
The experiment was repeated by several students using different bar magnets. Based on the investigations, which of these theories would the students most likely propose?

Group of answer choices

magnets attract iron nails

the poles of a magnet attract all materials

iron nails are attracted towards all materials

iron nails have the same properties as magnets

Answers

magnets attract everything with metal inside of it

Answer: magnets attract everything with metal inside of it

Explanation:

which is the correct formula for the compound dinitrogen monoxide?

Answers

Answer: Dinitrogen Monoxide ( also called nitrous oxide )

is an inorganic ( not made from living matter) compound with the chemical formula of N2O.

Explanation:

Read above

Using the periodic table, choose the more reactive nonmetal.
Br or As

Answers

Br and As:

Bromine is more reactive as reactivity increases on moving from left to right in p-block

What is an allotrope?
a) The same atom with a different number of neutrons
b) A radioactive substance
c) An alternative form of an element
d) Diamond

Answers

A I think but idrk I just guess sorry if you get it wrong cause of me just be careful I could be wrong

What is the Lewis structure for Iodide?

Answers

Answer:

In the Lewis structure for IF5 you'll need to put a total of 12 valence electrons on the Iodine atom in order to draw the Lewis structure. Remember that Iodine (I) can hold more than eight valence electrons. For the IF5 Lewis structure, calculate the total number of valence electrons for the IF5 molecule

Explanation:

I be knowing hope this helps

A wave with a smaller wavelength has _______ energy than one with a larger wavelength.

Answers

A wave with a smaller wavelength has more energy than one with a larger wavelength.
Required Answer :-

A wave with a smaller wavelength has UV radiation energy than one with a larger wavelength.

Additional information :-

It is harmful rays as a continuous effect on humans can cause skin and eye disorders. ... A large amount of UV rays comes from the sun is absorbed by the ozone layer in the atmosphere. Some other sources of UV rays are black lights, mercury lamps, and tanning lights.

Uses of UV Rays

The UV light is found in nature from sunlight and the application of sunlight is present in every field. It is present in both commercial and industrial purposes. Generally, it is used in purifying air, water treatment, skin treatment, indoor gardening, things identifying, and more uses by UV lamps.

The UV rays are used in a wide range, ranging from medical therapy to photography.

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Andrea is making a solution of sweet tea, with 20 grams of sugar dissolved in 180
grams of water. Determine the mass percentage of sugar in the sweet tea.

Answers

The mass percentage of sugar in the sweet tea is 10%

From the question,

We are to determine the mass percentage of sugar in the sweet tea

[tex]Mass\ percentage\ of\ sugar\ in\ the\ sweet\ tea = \frac{Mass\ of\ sugar\ in\ the\ solution}{Mass\ of\ the\ solution} \times 100\%[/tex]

Mass of sugar in the solution = 20 g

Mass of the solution = 20g + 180g = 200g

[tex]Mass\ percentage\ of\ sugar\ in\ the\ sweet\ tea = \frac{20}{200} \times 100\%[/tex]

[tex]Mass\ percentage\ of\ sugar\ in\ the\ sweet\ tea = \frac{20}{2} \%[/tex]

∴ Mass percentage of sugar in the sweet tea = 10%

Hence, the mass percentage of sugar in the sweet tea is 10%

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predict the product 1-bromo propane is treated with sodium metal

Answers

When 1-bromo propane is reacted with sodium metal, the propane and sodium bromide are formed.

Propane and sodium bromide are produced when the 1-bromo propane is reacted with sodium metal. The Bromine which is present in the 2-bromopropane is removed through hydrogenation and combines with the sodium metal which results in the production of propane and sodium bromide.So we can conclude that propane and sodium bromide are produced when the 1-bromo propane is reacted with sodium metal.

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100 ml of nitrogen collected at 27 degree celcius cooled to -73 degree celcius at same pressure.calculate the contraction in volume.​

Answers

Explanation:

P1. V1/T1 = P2. V2/T2

Apply this

since here, P1 = P2

100 ml / 300 = V2/ 200

==> 100*200/300 = V2

===> V2 = 66.66 ml

The amount of energy involved when an electron is acquired by a neutral gaseous atom is what?

Answers

Electron gain enthalpy of the atom - if im not wrong

how much usable energy is extracted from one glucose molecule

Answers

We can extract 3×3 power 3 from glucose molecules

How many grams of CO2 should be placed in a 250 mL container and -24°C to produce a pressure of 95K PA?

Answers

Answer:

About 0.53 g of carbon dioxide needs to be added.

Explanation:

Recall the ideal gas law:

[tex]\displaystyle PV = n RT[/tex]

To determine the amount of carbon dioxide we need, we need to solve for n:

[tex]\displaystyle n = \frac{PV}{RT}[/tex]

Recall that P, V, and T are in atm, L, and K, respectively. R is the universal gas constant.

Convert all values into the correct units:

Volume:

[tex]\displaystyle 250\text{ mL } \cdot \frac{1 \text{ L}}{1000 \text{ mL}} = 0.25 \text{ L}[/tex]

Temperature:

[tex]\displaystyle \begin{aligned} K & =( ^\circ C) + 273.15 \\ \\ & = (-24) + (273.15) \\ \\ & = 249 \text{ K}\end{aligned}[/tex]

And pressure:

[tex]\displaystyle 95 \text{ kPa} \cdot \frac{1.00 \text{ atm}}{101.3 \text{ kPa}} = 0.94 \text{ atm}[/tex]

Substitute and evaluate:

[tex]\displaystyle\begin{aligned} n & = \frac{\left(0.94 \text{ atm}\right)\left(0.25 \text{ L}\right)}{\left(\dfrac{0.08206 \text{ L-atm}}{\text{mol-K}}\right)\left(249\text{ K}\right)} \\ \\ & = 0.012 \text{ mol CO$_2$}\end{aligned}[/tex]

Convert moles to grams:

[tex]\displaystyle 0.012 \text{ mol CO$_2$} \cdot \frac{44.01 \text{ g CO$_2$}}{1 \text{ mol CO$_2$}} = 0.53 \text{ g CO$_2$}[/tex]

In conclusion, about 0.53 g of carbon dioxide needs to be added.

grade 11 chemistry(GASES) why does does cold soda taste great but warm soda taste flat?

Answers

Why does cold soda taste great but warm soda taste flat ?

Answer

When a carbonated drink is at room temperature, it is less fizzy and taste flat. Cool it down and it will taste better because the drink is designed to be drank at a lower temperature for optimal fizz and taste.

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the wind pushes a paper cup along the sand at a beach. the cup has a mass of 0.025 kg and accelerates at a rate of 5 m/s2. how much force is the wind exerting on the cup

Answers

To find the force,

 ⇒ must know the force's formula ⇒ F = MA

M: mass of the objectA: acceleration of the object

Let's consider the information given:

cup has a mass of 0.025kg --> 'M'accelerates at a rate of 5 m/s^2 --> 'A'

Let's solve:

  [tex]F=MA=0.025kg*5m/s^2=0.125N[/tex]

Thus the force is 0.125N

Answer: 0.125N

Hope that helps!

The ribosomes of plant cells are sites for the synthesis of
(a) ATP (b) nucleic acids (c) sugars (d) proteins

Answers

Answer:

Proteins

Explanation:

Their Function Formation Encoded in mRNA into polypeptide chains of amino acids that produces protein

The ribosome of plant cells are sites for the synthesis of proteins. The correct option is (d).

What are ribosomes?

Ribosomes are organelles that take part in the synthesis of proteins. The prokaryotic cell's ribosomes are smaller than the eukaryotic cell's ribosomes.

Currently, ribosomal RNA is a component of the cell's ribosome or protein-building machinery. The process of making proteins, or translation, is carried out by ribosomes.

The ribosome, which translates the genetic code generated in mRNA into an amino acid sequence, is universally responsible for protein synthesis. The two ribosomal subunits, small and big, come together to form the full ribosome, which is used to produce proteins.

Therefore, the correct option is (d) proteins.

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Which part of this chemical reaction is the Brønsted-Lowry base?

BrO + H2CO3 --> HCO3 + BrOH

BrO
HCO3
H2CO3
BrOH

Answers

The part of the chemical reaction that is the Brønsted-Lowry base is BrO.

BRONSTED-LOWRY BASE:

Bronsted-Lowry definition of a base and acid is as follows:

A base is a substance that accepts a hydrogen ion or proton (H+) An acid is a substance that donates or loses a hydrogen ion or proton (H+).

According to this question, the following chemical reaction is given:

BrO + H2CO3 → HCO3 + BrOH

In the above reaction, BrO is the compound that accepts the hydrogen ion (H+) to become BrOH, hence, BrO is the Bronsted-Lowry base.

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where is the atomic mass on the periodic table

Answers

Explanation:

At the upper left is the atomic number, or number of protons. In the middle is the letter symbol for the element (e.g., H). Below is the relative atomic mass, as calculated for the isotopes found naturally on Earth. At the very bottom is the name of the element (e.g., hydrogen).

How much energy is needed to convert 15.0 g of ice at -5.0 oC into water at 50.0 oC?

Answers

m=15g=0.015kg∆T=50-(-5)=55°C=328Kc=4184J/kg°K

Using thermodynamics

[tex]\\ \sf\longmapsto Q=mc∆T[/tex]

[tex]\\ \sf\longmapsto Q=0.015(328)(4184)[/tex]

[tex]\\ \sf\longmapsto Q=20585.28J[/tex]

Sulfur reacts with oxygen to form sulfur dioxide (SO2(g), Delta. Hf = â€"296. 8 kJ/mol) according to the equation below. Upper S (s) plus upper O subscript 2 (g) right arrow upper S upper o subscript 2 (g). What is the enthalpy change for the reaction? Use Delta H r x n equals the sum of delta H f of all the products minus the sum of delta H f of all the reactants. â€"593. 6 kJ â€"296. 8 kJ 296. 8 kJ 593. 6 kJ.

Answers

The enthalpy of this reaction is -296. 8 kJ/mol.

The equation of the reaction is;

S(s) + O2(g) -----> SO2(g)

Recall that the enthalpy of the reaction can be obtained from the formula;

ΔHrxn = ΔHf(products) - ΔHf(reactants)

We know that;

ΔHf S(s) = 0 KJ/mol

ΔHf O2(g) =  0 KJ/mol

ΔHf SO2(g) = -296. 8 kJ/mol

Hence;

ΔHrxn =  -296. 8 kJ/mol - [0 KJ/mol + 0 KJ/mol]

ΔHrxn = -296. 8 kJ/mol

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why do you think polar aprotic solvents increase the rate of an sn2 reaction

Answers

Polar protic solvents actually speed up the rate of the unimolecular substitution reaction because the large dipole moment of the solvent helps to stabilize the transition state. The highly positive and highly negative parts interact with the substrate to lower the energy of the transition state.

Which two observations are evidence that a chemical change is happening?
A. A yellow liquid forms as a yellow solid is slowly heated.
I B. Bubbles of gas are released when a solid is combined with a
liquid.
I c. Solid crystals form as the temperature of a liquid is lowered.
D. Light and heat are given off after a spark ignites a substance,

Answers

B. Bubbles are created whether using heat or not at inception of chemical change

Which tool would give the most precise measurement of 15 milliliters of water

Answers

A graduated cylinder

_________________

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Tell me What is an element?

Answers

Answer:

Any substance that cannot be decomposed into simpler substances by ordinary chemical processes.

Another definition:

An element is the simplest pure substance which can neither be split nor built up from other simpler substances by chemical reaction

What is the process that results in the formation of an ion

Answers

The answer is ionization

look at the chemicals listed below and answer the questions . iron
water
sand
oxygen
gold
carbon dioxide
helium
carbon
rust
seawater
1. Name the two metals
2.Name a gas that is not an element
3.Name a mixture
4.Name a non metallic element that is a solid .​

Answers

Answer:

1. gold and rust

2. carbon dioxide

3. sea water

4. carbon

Answer:

1. Gold and Iron

2. Helium

3. Seawater

4.Rust

Explanation:

Which chemical reaction occurs between steps 1 and 5?

Answers

The answer is hydrolysis, as water is added to the molecule to break the bond between the parts of the molecule.

Three shining iron nails Kept unday the following conditions.

a) kept open in attest tube containing А wet cotton.

B )kept in a closed container quick lime

c) About half protein of the nail is kept immrest in sodium chloride solution




questions:-

1) al which of these nails get rusted ? o

2)identify the nail which does not undergo rusting Give reason

3)Suggest a method to prevent corrosion of iron​

Answers

Answer:

1. the nail which is kept immersed in Sodium Chloride solution

2.

Explanation:

"uses for simple machines" whats a piano that needs to be moved up to a third floor apartment

Answers

Answer:

Pulley

Explanation:

You can't the piano up the stairs, you need to something to bring it up

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