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Butoxors [25]
2 years ago
6

Can someone help me with these three Chemistry questions?

Chemistry
1 answer:
Xelga [282]2 years ago
8 0
There are 6 molecules of Mg3(PO4)2
6 × 3 = 18 Mg
6 × 4 × 2 = 48 O

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Which material is a mixture 1 water 2 air 3 methane 4 magnesium
amm1812

Answer: Air

Explanation: Pure air is a mixture of several gases that are invisible and odorless. Consists of 78% nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide.

8 0
2 years ago
An industrial manufacturer wants to convert 175 kg of methane into HCN. Calculate the masses of ammonia and molecular oxygen req
Tema [17]
Given:

175 kilograms of Methane (CH4) to be synthesized into Hydrogen Cyanide (HCN)

The balanced chemical equation is shown below:

2 CH4<span> + 2 NH</span>3<span> + 3 O</span>2<span> → 2 HCN + 6 H</span>2<span>O
</span>
To calculate for the masses of ammonia and oxygen needed, our basis will be 175 kg CH4.

Molar mass:
CH4 = 16 kg/kmol
NH3 = 17 kg/kmol
O2 = 32 kg/kmol

mass of NH3 = 175 kg CH4 / 16 kg/kmol * (2/2) * 17 kg/kmol 
mass of NH3 = 185.94 kg NH3 needed

mass of O2 = 175 kg CH4 / 16 kg/kmol * (3/2) * 32 kg/kmol
mass of O2 = 525 kg

mass of O = 525 kg / 32 kg/kmol * (1/2) * 16 kg/kmol
mass of O = 131.25 kg O 
4 0
3 years ago
Elements in which the d-sublevel is being filled have the properties of
Nadya [2.5K]

Answer:

Elements in which the d-sublevel is being filled have the properties of metals

4 0
2 years ago
Read 2 more answers
The cubic centimeter (cm3) is a measurement of which of the following quantities? Density
Murljashka [212]

(cm3)  is a commonly used unit of volume that extends the derived SI-unit cubic metre, and corresponds to the volume of a cube that measures 1 cm × 1 cm × 1 cm.

so the answer is volume



8 0
2 years ago
What gas is the product of propane burning
GaryK [48]
I believe propane burns to form water vapor and carbon dioxide
4 0
3 years ago
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