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3 years ago

11

How is a slump different from creep?

1 answer:

grin007 [14]3 years ago

8 0

Answer:

Is this chemistry or ELA!

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What is the half life of an atom that goes from 16000 g to 125 g in 163.24 days.

Alenkinab [10]

Answer:

$23.32\ \text{days}$

Explanation:

N = Final mass of atom = 125 g

$N_0$ = Initial mass of atom = 16000 g

t = Time taken = 163.24 days

$t_{1/2}$ = Half life

We have the relation

$N=N_0\dfrac{1}{2}^{\dfrac{t}{t_{1/2}}}\\\Rightarrow 125=16000\times \dfrac{1}{2}^{\dfrac{163.24}{t_{1/2}}}\\\Rightarrow \dfrac{125}{16000}=\dfrac{1}{2}^{\dfrac{163.24}{t_{1/2}}}\\\Rightarrow \ln0.0078125=\dfrac{163.24}{t_{1/2}}\ln0.5\\\Rightarrow t_{1/2}=\dfrac{163.24\times\ln0.5}{\ln0.0078125}\\\Rightarrow t_{1/2}=23.32\ \text{days}$

The half life of the atom is $23.32\ \text{days}$ .

3 0

3 years ago

What is the molarity of a 2.0 l sodium hydroxide solution containing 1.0 grams of solute?

kicyunya [14]

The molarity of a Solution is the Moles of the Sollute / Liters of Sollution.
2/1 = 1

5 0

3 years ago

How many moles are in 7.2 x 10^23 carbon molecules?

choli [55]

Explanation:

It is known that in 1 mole there are $6.023 \times 10^{23}$ atoms or molecules.

It is given that there are $7.2 \times 10^{23}$ carbon molecules. Therefore, calculate the moles as follows.

Number of moles = $\frac{7.2 \times 10^{23} molecules}{6.023 \times 10^{23} molecules/mol}$

= 1.196 mol

Thus, we can conclude that there are 1.196 mol in $7.2 \times 10^{23}$ carbon molecules.

7 0

3 years ago

According to the VSEPR theory, a molecule or ion of NH₃ will have a _____ shape.

Elan Coil [88]

Answer:

B) flat trigonal

Explanation:

All the Hydrogen atoms are arranged symmetrically around the Nitrogen atom which forms the base, and the two nonbonding electrons form the tip

4 0

3 years ago

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The percentage of Chlorine in the sample

seropon [69]

Im sorry really dont know the answer

4 0

3 years ago