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iren2701 [21]
3 years ago
11

Which of the following precautions is important when using a Bunsen burner or Meker burner?a. Set up your work space so that wir

es and cables cannot accidentally make contact with the flame or hot glassware and meltb. Set up your work space with the burner in a secure location away from the edge of the benchc. Set up the work space so that flammable materials are away from the burnerd. Never leave an open flame unattendede. Remember that any glassware heated by the burner will look the same when hot as cold, and it will take a while to coolf. Always tie back hair
Chemistry
1 answer:
Gekata [30.6K]3 years ago
6 0

Answer:

Never leave an open flame unattended

Explanation: if an open flame is left unattended it can cause a fire outbreak so we have to watch it at all times to prevent the fire outbreak

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Which of the species would be expected to be the most miscible in benzene (c6h6)? 1. decane, c10h22 2. hydrogen fluoride, hf 3.
max2010maxim [7]

Answer is: 1. decane, c10h22

This pair will most likely form a homogeneous solution because they are both nonpolar substances and "like dissolves like".

Other pairs will not form homogeneous solution because polar (methanol, sugar) or ionic (h<span>ydrofluoric acid)</span> substances have low solubility in nopolar (benzene) substances.

7 0
3 years ago
Read 2 more answers
Butylated hydroxytoluene (BHT) is used as an antioxidant in processed foods. (It prevents fats and oils from becoming rancid.) A
Svetllana [295]

Answer:

Molecular mass of BHT is 204,2 g/mol

Explanation:

To answer this question you need to know that Freezing-point depression (A colligative property) is the decrease of the freezing point of a solvent on the addition of a non-volatile solute. The formula is:

ΔT = Kf m

Where ΔT is the freezing point depression (5,5°C - 4,880°C =  0,62°C

Kf that is freezing point molar constant of the solvent (5,065°C/m)

And m that is molality (moles of solute/kg of solvent). Replacing:

m = 0,1224 \frac{mole Solute}{kgSolvent}

Knowing you have 100,0g of solvent ≡ 0,1000 kg:

\frac{0,1224 moles}{1 kg Solvent} *0,1000 kg =<em> 0,01224 moles of solute </em> <em>≡ BHT</em>

As grams of BHT are 2,500, molecular mass of BHT is:

\frac{2,500g}{0,01224 moles BHT} = <em>204,2 g/mol</em>

<em></em>

I hope it helps

3 0
3 years ago
Taxol is a potent chemotherapeutic agent (isolated from the Pacific Yew tree) which is especially effective against ovarian canc
butalik [34]

Answer:

Amine

Explanation:

The functional groups contained in Taxol are :

Ketone , Ester, Amide and Alcohol

while the functional group that is not contained in the Taxol is Amine

Taxol is a very potent anti-cancer chemotherapeutic, and it is also groped into a class called Taxanes and this makes it effective in the treatment of breast and ovarian cancer.

8 0
3 years ago
What is the molarity of a solution made by mixing 50.0 g of magnesium nitrate, Mg(NO3)2, in enough water to make 250. mL of solu
Ira Lisetskai [31]
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8 0
3 years ago
I need help with this question ASAP
avanturin [10]

Answer:

True

Explanation:

Asexual reproduction does not involve sex cells or fertilization . Only one parent is required, unlike sexual reproduction which needs two parents. As a result, the offspring are genetically identical to the parent and to each other.

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