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garik1379 [7]
3 years ago
13

The astronaut then measures the abundance of strontium on the new planet, obtaining the following results:

Chemistry
1 answer:
stich3 [128]3 years ago
8 0
Atomic mass is equal to the average number allowing for the relative abundances of different isotopes. It is calculated by:

Atomic mass = ΣzₓAₓ 

where zₓ is the relative abundance of the isotope and Aₓ is the atomic mass of the isotope.

Atomic mass = (0.0946x85.91) + (0.07x86.91) + (0.8354x87.91) = 87.6508 amu
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Trying to explain why a cactus needs little water to survive is an example of
zmey [24]
It’s a or b i think it’s b
6 0
3 years ago
A____ will not take the shape of its container
liubo4ka [24]

Answer:

A solid  will not take the shape of its container

Explanation:

5 0
2 years ago
A chemist dissolves of pure hydroiodic acid in enough water to make up of solution. Calculate the pH of the solution. Be sure yo
Gre4nikov [31]

Answer:

1.76

Explanation:

There is some info missing. I think this is the original question.

<em>A chemist dissolves 660.mg of pure hydroiodic acid in enough water to make up 300.mL of solution. Calculate the pH of the solution. Be sure your answer has the correct number of significant digits.</em>

<em />

Step 1: Calculate the molarity of HI(aq)

M = mass of solute / molar mass of solute × liters of solution

M = 0.660 g / 127.91 g/mol × 0.300 L

M = 0.0172 M

Step 2: Write the acid dissociation reaction

HI(aq) ⇄ H⁺(aq) + I⁻(aq)

HI is a strong acid, so [H⁺] = 0.0172 M

Step 3: Calculate the pH

pH = -log [H⁺]

pH = -log 0.0172

pH = 1.76

5 0
3 years ago
Calculate the time it takes for an object moving with a speed of 13m/s to travel 50 m
kykrilka [37]

Answer:

<h3>The answer is 3.85 s</h3>

Explanation:

The time taken can be found by using the formula

t =  \frac{d}{v}  \\

d is the distance covered

v is the velocity

From the question we have

t =  \frac{50}{13}  \\  = 3.846153...

We have the final answer as

<h3>3.85 s</h3>

Hope this helps you

7 0
3 years ago
Need help with the 1st one
lutik1710 [3]

If I’m right this should be the answer

7 0
2 years ago
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