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4 years ago

5

Which agency publishes the food code

1 answer:

Sergeeva-Olga [200]4 years ago

4 0

Food code is like sort of a guide to ensure that the food is presented according decent standards, unadulterated and correctly presented to the customer.
It is published every four years by the " U.S Food and Drug Administration".

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calculate the molar mass of nickel (iii)oxide to the nearest tenth place. Give both the numerial value and the units

maksim [4K]

Nickel (Ni) has the charge as +3 while oxygen (O) has -2. Hence, the chemical formula for the nickel (iii) oxide is Ni₂O₃.

molar mass of Ni = 58.69 g/mol
molar mass of O = <span>15.99 g/mol

number of Ni atoms in </span>Ni₂O₃ = 2
Molar mass of Ni in Ni₂O₃ = 2 x 58.69 g/mol = 117.38 g/mol

number of O atoms in Ni₂O₃ = 3
Molar mass of O in Ni₂O₃ = 3 x 15.99 g/mol = 47.97 g/mol

Hence, molar mass of compound = 117.38 g/mol + 47.97 g/mol
= 165.35 g/mol
=<span> 165.4 g/mol</span>

8 0

4 years ago

A 0.907 mole sample of ideal gas at 12c occupies a volume of 4.25L. What is the pressure of gas?

mel-nik [20]

Pressure of the ideal gas=505.7kPa

Given:

No of moles=0.907mole

Temperature of the gas= $12^{\circ} \mathrm{C}$

Volume of the gas=4.25L

To find:

Pressure of the gas

<u>Step by Step Explanation: </u>

Solution:

According to the ideal gas equation

$P V=n R T$ and from this pressure is derived as

$P=\frac{n R T}{V}$

Where P=Pressure of the gas

V=Volume of the gas=4.25L

n=No of the moles=0.907mole

R=Gas constant=8.314 $J / m o l^{-1} K^{-1}$

T=Temperature of the gas= $12^{\circ} \mathrm{C}$ =273+12=285K

Substitute these known values in the above equation we get

$P=\frac{0.907 \times 8.314 \times 285}{4.25}$

$P=\frac{2149.13}{4.25}$

P=505.7kPa

Result:

Thus the pressure of the ideal gas is 505.7kPa

7 0

3 years ago

What is the wavelength of electromagnetic radiation with a frequency of 9.23 × 10^-7 Hz?

stich3 [128]

3.25 x 10¹⁴m

Explanation:

Given parameters:

Frequency of the radiation = 9.23 x 10⁻⁷hz

Unknown:

Wavelength of the radiation = ?

Solution:

The velocity of electromagnetic radiation is the same as that of the speed of light in vacuums.

Velocity = frequency x wavelength.

Velocity = 3 x 10⁸m/s

Since the unknown is wavelength, we factor it out:

Wavelength = $\frac{Velocity }{frequency}$

Wavelength = $\frac{x}{y}$ $\frac{ 3 x 10^{8} }{9.23 x 10^{-7} }$

= 3.25 x 10¹⁴m

learn more:

Wavelength brainly.com/question/6352445

#learnwithBrainly

4 0

3 years ago

What is the wavelength of this wave?<br> 10 cm<br> 15 cm<br> 60 cm<br> cannot be determined

Cloud [144]

My mom is a teacher and she said can not be determined

7 0

3 years ago

How is half-life most likely used with respect to this fossil? to find the mass of the fossil to find the age of the fossil to d

ki77a [65]

That would be to find the age of the fossil. Its called radiometric dating.

4 0

3 years ago

Read 2 more answers