frankthetank99 frankthetank99

13-05-2021
Chemistry

contestada

NEED HELP ASAPPP

What is the number of beryllium atoms in 78.0g of Be?

Respuesta :

keijosalonen keijosalonen

13-05-2021

Answer: number of atoms is 5.21 · 10^24

Explanation: Atomic mass of Be is 9.012 g/mol.

Number of moles n = m/M = 78.0 g / 9.012 g/mol =

Multiply this with Avogadro number Na = 6.022*10^23 1/mol

Answer Link

Otras preguntas

If it takes 4 men 6 hours to repair a road, How long will it take 3 men to do the job if they work at the same rate ?

Solve this system of equations by any method. 5x + y = -13 4x + 3y= -17

The Endangered Species Act was established in 1973. This significant environmental law provides all of the following except. protection for threatened and enda

According to the condensation theory, the most important factor for the formation of our planets was _____. a-the gravitational pull of the Sun b-the interstell

Why is it helpful to study the light that comes off stars? a. The light from a star can help us predict the weather. b.The light from a star tells us what shap

PLZ HELP :( The ordered pairs model an exponential function, where p is the function name and t is the input variable. {(1, 80), (2, 240), (3, 720), (4, 2160)}

An experiment consists of casting a pair of dice and observing the number that falls uppermost on each die. (a) Determine the event that the sum of the numbers

What is Henry Wallace's main argument?

Yo hablo con la ______________ cuando yo necesito una habitación en el hotel.

If N is a negative number, then what is the distance of N from 0?