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Vera_Pavlovna [14]

4 years ago

10

What does an electron and neutron have in common

2 answers:

ki77a [65]4 years ago

8 0

Very little except that they are both particles that make up atoms. The electron is a lepton with very little mass and a negative electrical charge. The neutron is a much more massive , chargeless particle (a hadron) which with protons ( positively-charged hadrons ) forms the atomic nucleus.

krok68 [10]4 years ago

4 0

<span>They have the same mass and are both located in the nucleus of the atom.</span>

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How many atoms are found in a 15.5 g sample of bismuth?

r-ruslan [8.4K]

Answer:

4.47 x 10²² atoms

Explanation:

Given parameters:

Mass of Bismuth = 15.5g

Unknown:

Number of atoms = ?

Solution:

To find the number atoms, first solve for the number of moles in this element first.

Number of moles = $\frac{mass}{molar mass}$

Number of moles = $\frac{15.5}{209}$ = 0.074mole

So:

1 mole of a substance contains 6.02 x 10²³ atoms

0.074 mole of Bismuth will contain 0.074 x 6.02 x 10²³ atoms

= 4.47 x 10²² atoms

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3 years ago

7. What is the name of an element with 3 protons and 5 neutrons?

rewona [7]

Answer: Lithium - 8

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2 years ago

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The human body has several major systems. Most body systems have multiple functions. Which of the following is NOT a major funct

tensa zangetsu [6.8K]

Answer:D

Explanation:

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8 0

3 years ago

Under which conditions of temperature and pressure, the real gas behave ideally?

labwork [276]

Answer:

A real gas will act as an ideal gas under high temperature and at a low pressure.

Real gases are non-ideal gases whose molecules occupy space and have interactions, consequently, they do not adhere to the ideal gas law.

An ideal gas has molecules that occupy negligible space and have no interactions, and which consequently obeys the gas laws exactly.

Explanation:

8 0

2 years ago

Working on-board a research vessel somewhere at sea, you have (carefully) isolated 12.5 micrograms (12.5 ×10–6 g) of what you ho

german

Answer:

The value is $Z = 311.33 \ g/mol$

Explanation:

From the question we are told that

The mass of saxitoxin is $m = 12.5 mg = 12.5 * 10^{-6} g$

The volume of water is $V = 3.10 mL = 3.10 *10^{-3} L$

The osmotic pressure is $P = 0.236 = \frac{0.236}{760} = 3.105 * 10^{-4} atm$

The temperature is $T = 19^oC = 19 + 273 = 292 \ K$

Generally the osmotic pressure is mathematically represented as

$P = C * T * R$

Here R is the gas constant with value

$R = 0.0821 ( L .atm /mol. K)$

and C is the concentration of saxitoxin

So

$3.105 * 10^{-4} = C * 0.0821 * 292$

$C = 1.295 *10^{-5} mol/L$

Generally the number of moles of saxitoxin is mathematically represented as

$n = C * V$

=> $n = 1.295 *10^{-5} *3.10 *10^{-3}$

=> $n = 4.015 *10^{-8} \ mol$

Generally the molar mass of saxitoxin is mathematically represented as

$Z = \frac{m}{n}$

=> $Z = \frac{12.5 * 10^{-6}}{ 4.015 *10^{-8}}$

=> $Z = 311.33 \ g/mol$

5 0

4 years ago