Mathematics, 27.06.2020 01:01 lizzyhearts

Please help 1. rubidium has two isotopes, 72.2% rubidium-85, and 27.8% rubidium-87. Calculate the average atomic mass of rubidium.

2. Bromine also has two isotopes: 50.7% is bromine-79 and 49.3% is bromine-81. Can you estimate the average atomic mass of bromine without using a calculator?

3. What is the average atomic mass of fluorine, whose only naturally occurring isotopes has an atomic mass of 19?

Answers: 1

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 22:30

Complete the equation of the live through (-1,6) (7,-2)

Answers: 1

Answer

Mathematics, 22.06.2019 02:30

What are the triple angle formulas? is it related to double angle identities?

Answers: 1

Answer

Mathematics, 22.06.2019 04:00

If the equation of a line containing the midsegment of a triangle is y = -1/4x -11, what is the slope of the triangle side that is opposite the midsegment (the one not touching it). explain how you know.

Answers: 1

Answer

Mathematics, 22.06.2019 06:00

Estimate the square root of 37 to the nearest tenth

Answers: 2

Answer

You know the right answer?

Please help 1. rubidium has two isotopes, 72.2% rubidium-85, and 27.8% rubidium-87. Calculate the a...

Questions

Mathematics, 06.05.2021 22:20

Can you help me with this math question pls? I need help super fast.

Mathematics, 06.05.2021 22:20

hayley wants to attend bellhaven collage after high school. she knows that the yearly cost is around $17000 per year. her parents started a college ac...

Social Studies, 06.05.2021 22:20

The cons of the American welfare system and the Anglo-Saxon welfare model....

English, 06.05.2021 22:20

Help..complete the sentences with the correct form of the verbs.

Social Studies, 06.05.2021 22:20

What is systematic replication? developing a plan for how data will be collected in order to answer a research question repeating a stud...

Chemistry, 06.05.2021 22:20

Each level of organization in an ecosystem is made up of parts. Which of the following is an example of the population level of organization in a cora...

Chemistry, 06.05.2021 22:20

Hey chemistry ppl help me b fashionista alot of ppl like the third one

Mathematics, 06.05.2021 22:20

Meria rewrites atraction less than as a decimal The numerator is a whole number greater then . For which enominator will the traction always convert...

Mathematics, 06.05.2021 22:20

Sheeesh please help pls ...

Mathematics, 06.05.2021 22:20

Which two tables represent data sets that could be fit to a normal distribution curve? A. value 1 2 3 4 5 6 7 8 9 10 11 percentage 1.5% 2.1% 2.2% 3.3%...

Physics, 06.05.2021 22:20

What is the gravity on a planet that has a 95 kg person standing on a cliff 300 meters above the ground with a Potential Energy of 342,000 J? (Only...

Chemistry, 06.05.2021 22:20

Can someone plsss tell the answers for all of these pls no links ?

Mathematics, 06.05.2021 22:20

CIRCLE THEOREMS PLS HELP ...

History, 06.05.2021 22:20

If you get involved with Father Hidalgo and his revolutionaries you risk your life and the safety of your family. Would you join them? Why or why not?...

English, 06.05.2021 22:20

HELP EZ PTS give me info on food allergies of tree nuts Food sources - Non-food sources - Other names - Emergency Treatment...

Chemistry, 06.05.2021 22:20

_ fronts move more _ and tend to form __ clouds....

Mathematics, 06.05.2021 22:20

Find the MAD of the following data. {16, 25, 18, 15, 21}...

Mathematics, 06.05.2021 22:20

Amanda's age is one-half of Sally's. Which variable expression represents Amanda's age? s + 2 12+s s2

Chemistry, 06.05.2021 22:20

Algunos refrescos contienen 11% en masa de azúcar, determina cuantos gramos contendrá una botella de refresco de Coca Cola con 600 gr de...

Mathematics, 06.05.2021 22:20

If you need 3 cups of flour for 1 batch of cookies, how many cups of flour will you need for 3 batches of cookies?...

More questions: Mathematics Another questions