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3 years ago

No one ever helps me ☹️ can y’all look at my questions !?

Chemistry

2 answers:

Orlov [11]3 years ago

8 0

Answer:

$Hope this helps you$ A typical atom consists of three subatomic particles: protons, neutrons, and electrons (as seen in the helium atom below). Other particles exist as well, such as alpha and beta particles (which are discussed below). The Bohr model shows the three basic subatomic particles in a simple manner. Most of an atom's mass is in the nucleus—a small, dense area at the center of every atom, composed of nucleons. Nucleons include protons and neutrons. All the positive charge of an atom is contained in the nucleus, and originates from the protons. Neutrons are neutrally-charged. Electrons, which are negatively-charged, are located outside of the nucleus. $Enjoy your day$

Explanation:

Nady [450]3 years ago

4 0

Answer:

Atoms are the fundamental building blocks of all matter and are composed of protons, neutrons, and electrons. Because atoms are electrically neutral, the number of positively charged protons must be equal to the number of negatively charged electrons. Since neutrons do not affect the charge, the number of neutrons is not dependent on the number of protons and will vary even among atoms of the same element.

Explanation:

hope it helps

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compare (a) the numer of atoms and (b) the number of grams present in 1.00 mole of helium and 1.00 mole of argon

WITCHER [35]

Answer:

For a: The number of atoms of both the gases remains the same.

For b: The number of grams of 1 mole of argon is more than 1 mole of helium by 35.95 grams.

Explanation:

For a:

To calculate the number of atoms, we use mole concept.

According to mole concept:

1 mole of an element contains $6.022\times 10^{23}$ number of atoms.

We are given two gases of same number of moles.

Therefore, 1 mole of helium gas will contain $1\times 6.022\times 10^{23}=6.022\times 10^{23}$ number of atoms.

and, 1 mole of argon gas will contain $1\times 6.022\times 10^{23}=6.022\times 10^{23}$ number of atoms.

Hence, number of atoms of both the given gases remains the same.

For 2:

As, the molar mass of both the gases are different, so their masses in 1 mole will be different.

To calculate the number of moles, we use the equation:

$\text{Number of Moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Calculating the mass of Helium in 1 mole:

Molar mass of helium = 4 g/mol

Putting the values in above equation, we get:

$1mol=\frac{\text{Given mass}}{4g/mol}=4grams$

Calculating the mass of Argon in 1 mole:

Molar mass of Argon = 39.95 g/mol

Putting the values in above equation, we get:

$1mol=\frac{\text{Given mass}}{39.95g/mol}=39.954grams$

Calculating the difference of masses of both the gases = (39.95 - 4)g = 35.95g

Therefore, the mass of argon is more than mass of helium by 35.95 grams.

8 0

3 years ago

if you had a house with bot copper and zinc galvanized iron water pipes, which metal would be oxidized first? Why would this be

kumpel [21]

Zinc is a strong reducing agent. Copper will be oxidized first.

8 0

4 years ago

Read 2 more answers

Which change will create a more dilute solution?

dedylja [7]

I think the correct answer would be the third option. The change that will create a more dilute solution should affect the amount of the solvent since it is the component that is greater than the solute. Being dilute would mean there is a very small amount present of a solute in a solution. Increasing the amount of the sovent, would result to a lesser concentration of the solute.

5 0

4 years ago

Read 2 more answers

Where is thermal equilibrium achieved between two objects

crimeas [40]

Answe......................

Explanation:

3 0

3 years ago

Help me with this question please

mash [69]

Answer:

a. Oxidising agent: Cl₂

b. Reducing agent: NaBr

c. Oxidised: NaBr

d. Reduced: Cl₂

e. Oxidation numbers before reaction: Cl= 0, Na= +1, Br= -1

f. Oxidation numbers after reaction: Cl= -1, Na= +1, Br= 0

Explanation:

Oxidising agents reduces themselves, oxidising other elements/compounds.

Reducing agents oxidise themselves, reducing other elements/compounds.

Oxidation is the loss of electrons or an increase in oxidation number.

Reduction is the gain of electrons or decrease in oxidation number.

6 0

2 years ago