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2 years ago

How would describe the characteristics of the urine

Chemistry

1 answer:

gogolik [260]2 years ago

3 0

Urine has the color of pale yellow to deep amber. It is odorless and has a pH of 4.5-8.0

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What statement correctly describes the key features of the graph of f(x) = 4(1/2)^(x + 1 )− 3

Snezhnost [94]

Y-intercept of (0, −1), starts up on the left, gets closer to y = −3 on the right.

You have to plot the graph to see it. Google online graphing calculator and enter the equation.

6 0

3 years ago

Read 2 more answers

Gold has an atomic weight of 196.97 g/mol, and a density of 19.3 g/cm3. Approximately how many atoms are in a spherical gold nan

ale4655 [162]

Answer: The number of atoms in spherical gold nano particle are $26.918\times 10^4$

Explanation:

To calculate the volume of sphere, we use the equation:

$V=\frac{4}{3}\pi r^3$

where,

r = radius of the sphere = $10nm=10^{-6}cm$ (Conversion factor: $1nm=10^{-7}cm$ )

Putting values in above equation, we get:

$V=\frac{4}{3}\times 3.14\times (10^{-6})^3\\\\V=4.19\times 10^{-18}cm^3$

To calculate mass of of the substance, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Volume of gold = $4.19\times 10^{-18}cm^3$

Density of gold = $19.3g/cm^3$

Putting values in above equation, we get:

$19.3g/cm^3=\frac{\text{Mass of gold}}{4.19\times 10^{-18}}\\\\\text{Mass of gold}=8.0867\times 10^{-17}g$

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Mass of gold = $8.8067\times 10^{-17}g$

Molar mass of gold = 196.97 g/mol

Putting values in above equation, we get:

$\text{Moles of gold}=\frac{8.8067\times 10^{-17}g}{196.97g/mol}=4.47\times 10^{-9}moles$

According to mole concept:

1 mole of an element contains $6.022\time 10^{23}$ number of atom

So, $4.47\times 10^{-19}$ moles of gold will contain = $4.47\times 10^{-19}\times 6.022\times 10^{23}=26.918\times 10^4$ number of atoms.

Hence, the number of atoms in spherical gold nano particle are $26.918\times 10^4$

8 0

3 years ago

How many grams of KCI can be dissolved in 100 grams of water at 10 degree celsius

kolezko [41]

Check on go go gle the answer might be there

4 0

4 years ago

A 0.600 g sample of a compound of arsenic and oxygen was found to

ss7ja [257]

Answer:

The answer is C. As2O3

Explanation:

0.600 gr of Arsenic and Oxygen.

0.454 gr of Arsenic

So, 0.146 gr of Oxygen will be in the compound.

- First: The grams of each element must be divided by its atomic weight:

0.454 gr As / 74.92u As = 0.00606

0.146 gr O / 16u O = 0.009125

- Both results must be divided by the lowest number found:

0.00606 / 0.00606 = 1 As

0.009125 / 0.00606 = 1.5 O

- As one of the values is not an integer then both results are multiplied until both give an integer:

1 As * 2 = 2 As

1.5 O * 2 = 3 O

- Then the answer is given:

As2O3

5 0

3 years ago

What is the mole ratio of to Fe? 1:3 1:4 3:1 4:3

kobusy [5.1K]

What is the mole ratio of to Fe? if oxygen it is 4:3 Fe3O4

8 0

3 years ago