A mixture which contains more than one phase is called .
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A mixture that contains more than one phase is called heterogenous mixtures. Mixtures which have a single phase is called homogenous mixtures.
What are mixtures ?
Mixtures are the combination of two or more individual substances. They can be physically adhered or chemically bonded. Mixtures can be separated using physical techniques.
Broadly there are two types of mixtures, homogenous and heterogenous. The mixtures in which components are uniformly distributed and miscible each other forming a single phase is called homogenous mixtures.
Mixtures, in which each component is visible separately due to the immiscibility and phase separation is called heterogenous mixtures. Heterogenous mixtures can be easily separated into its components.
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Ca₃(PO₄)₂ = 310 g/mol
1 mole -------------------> 310 g
2.3x10⁻⁴ mole ---------> ?
m = 2.3x10⁻⁴ * 310 / 1
m = 0.0713 g
hope this helps!
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Cl is chlorine. Since their is 5 of chlorine, we call it pentachloride. Penta means 5, as in the shape PENTAgon.
Compound Name: Phosphorus pentachloride
We can see here that the compound with the formula, is called phosphorus pentachloride.
What is a compound?
A compound is a substance that consists of two or more different elements chemically bonded together in fixed proportions. In a compound, the constituent elements lose their individual properties and form new chemical properties unique to the compound.
The study of compounds is central to chemistry, as it involves understanding the structure, composition, and reactivity of substances. Compound analysis and synthesis play vital roles in various scientific fields, such as materials science, pharmaceuticals, and environmental science.
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Answer:
Explanation:
To calculate the largest amount of nitrogen gas (N2) that could be produced when ammonia gas (NH3) and oxygen gas (O2) react, you need to consider the balanced chemical equation for the reaction:
4 NH3(g) + 5 O2(g) -> 4 N2(g) + 6 H2O(g)
From the balanced equation, you can see that 4 moles of NH3 produce 4 moles of N2.
Now, let's calculate the number of moles of NH3 and O2 you have:
Moles of NH3 = 4.0 grams / molar mass of NH3
Moles of O2 = 8.0 grams / molar mass of O2
The molar mass of NH3 (ammonia) is approximately 17.03 g/mol, and the molar mass of O2 (oxygen) is approximately 32.00 g/mol.
Moles of NH3 = 4.0 g / 17.03 g/mol ≈ 0.235 moles
Moles of O2 = 8.0 g / 32.00 g/mol ≈ 0.250 moles
Now, you need to determine the limiting reactant, which is the reactant that is completely consumed and limits the amount of product formed. To do this, compare the mole ratio from the balanced equation to the actual moles of NH3 and O2:
NH3 : O2 = 4 moles : 5 moles
Since you have fewer moles of NH3 (0.235 moles) than the required 0.25 moles based on the mole ratio, NH3 is the limiting reactant.
Now, calculate the moles of N2 produced using the mole ratio:
Moles of N2 = Moles of NH3 (since it's the limiting reactant)
Moles of N2 = 0.235 moles
Now, you can convert moles of N2 to grams:
Mass of N2 = Moles of N2 x Molar mass of N2
The molar mass of N2 (nitrogen gas) is approximately 28.02 g/mol.
Mass of N2 = 0.235 moles x 28.02 g/mol ≈ 6.59 grams
Rounding to the nearest gram, the largest amount of N2 that could be produced is approximately 7 grams.
b. Wearing goggles
c. Pushing glass tubing, thermometers, or glass thistle tubes through a rubber cork
d. Pointing the mouth of a test tube that is being heated away from you and others
e. Knowing where the fire extinguisher and eyewash stations are located
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b. 3.0 mol
c. 6.5 mol
d. 156 mol
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Mole measure the number of elementary entities of a given substance that are present in a given sample. 3 mole of Cr are in 156 g of the element. The correct option is option B.
What is mole?
The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Mathematically, mole and molar mass of chromium can be related as :
number of mole =given mass of chromium÷ molar mass of chromium
Mass of chromium=156 g
Molar mass of 1 mole of chromium= 51.9961 g/mol
Substituting the given values we get,
number of mole =156 g ÷ 51.9961 g/mol
number of mole= 3
Therefore, the correct option is option B. 3 mole of Cr are in 156 g of the element.
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You are given the number of grams of Chromium which is 156 grams. The molar mass of chromium is 52 grams per mole. Divide 156 grams to 52 grams per mole of Chromium and you will get 3 moles of Chromium. The answer is letter B.