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Arturiano [62]
1 year ago
7

Express each of the following numbers in exponential notation:SHOW YOUR WORK

Chemistry
1 answer:
MaRussiya [10]1 year ago
4 0

Answer:

1 a

2 b

3 c

4 d

5 e

Explanation:

i know is corret

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How many total atoms are in 0.560 g of P2O5
ioda

Answer:

16.499 × 10∧ 21 atoms

Explanation:

Given data:

mass of P2O5= 0.560 g

number of atoms= ?

first of all we will calculate the molar mass of P2O5:

P = 2×31 g/mol = 62 g/mol

O = 5× 16 = 80 g/mol

molar mass of P2O5 = 142 g/mol

Noe we will find the moles of 0.560 g P2O5:

moles = mass / molar mass

moles = 0.560 g/ 142 g/mol

moles = 0.0039 mol

now we will find the atoms present in 0.0039 moles:

0.0039 × 6.02 × 10∧ 23 molecules

2.357 × 10∧ 21 molecules

P2O5 consist of 7 atoms:

2.357 × 10∧ 21  × 7 = 16.499 × 10∧ 21 atoms

7 0
3 years ago
Explain why spent nuclear fuel rods have to be treated as hazardous waste.
mojhsa [17]
Technically it's not such a waste anymore but it is dangerous chemicals that could kill others around it. 

Let me know if you need additional help in private message.

-GeVontae The Brainly team.
3 0
3 years ago
Read 2 more answers
Which of the following does not describe elements?
postnew [5]
The statement that does not describe elements would be that they can be separated by a chemical reaction. This is not the case, an element is a pure substance that can't be degraded into any other constituent that would form it. They are building blocks composed by atoms.
6 0
3 years ago
Read 2 more answers
Why all goals cannot be met in economics?
muminat
The in the very definition of 'economics' explains why. Since, economics is a  social science that studies human behaviour, is a relationship *BETWEEN* ends and scarce means..
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'ends' that is goals, and "scarce means" referred to the resources. So that is the economic problem, that there are *unlimited* wants but scarce resources. So the answer to this question is just: All goals cannot be reached because there are unlimited "goals", and few/limited resources.</span>
4 0
3 years ago
If the initial concentration of SO2Cl2 is 0.125 M , what is the concentration of SO2Cl2 after 210 s ?
andre [41]

Complete question:

The decomposition of SO2Cl2 is first order in SO2Cl2 and has a rate constant of 1.44×10⁻⁴ s⁻¹ at a certain temperature.

If the initial concentration of SO2Cl2 is 0.125 M , what is the concentration of SO2Cl2 after 210 s ?

Answer:

After 210 s the concentration of SO2Cl2  will be 0.121 M

Explanation:

ln\frac{[A_t]}{[A_0]} =-kt

where;

At is the concentration of A at a time t

A₀ is the initial concentration of A

k is rate constant = 1.44×10⁻⁴ s⁻¹

t is time

ln(At/A₀) = -( 1.44×10⁻⁴)t

ln(At/0.125) =  -( 1.44×10⁻⁴)210

ln(At/0.125) = -0.03024

\frac{A_t}{0.125} = e^{-0.03024

At/0.125 = 0.9702

At = 0.125*0.9702

At = 0.121 M

Therefore, after 210 s the concentration of SO2Cl2  will be 0.121 M

6 0
3 years ago
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