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3 years ago

You are working in the lab, how many grams of solute you need to make 200.0 g of 3.4% of solution?

Chemistry

1 answer:

Goryan [66]3 years ago

6 0

Answer:

6.8g of solute are needed

Explanation:

Percent by mass, (w/w%) is defined as the mass of solute in 100g of solution. A solution that is 3.4% contains 3.4g of solute in 100g of solution. That means to make 200g of solution are required:

200g solution * (3.4g solute / 100g solution) = 6.8g of solute are needed

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Enzyme, fat, sugar. Classify them into the group of organic compounds to which they belong to

Vilka [71]

Enzymes are proteins and speed up chemical reactions, i.e. are catalysts.
Fats are lipids and store energy.
Sugars are carbohydrates and also store energy.
hope this helps :)

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3 years ago

The tendency of molecules to move toward areas of lower concentration is called _____.

satela [25.4K]

The correct answer is B. The tendency of molecules to move toward areas of lower concentration is called diffusion. This happens when there is a concentration gradient. This is described by the Fick's laws of diffusion. Diffusion is the net movement of molecules from a higher concentration to lower concentration to achieve equilibrium.

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3 years ago

Read 2 more answers

A home remodeling company charges $10 per square yard for installing new carpets. What is the cost for installing a carpet for a

balu736 [363]

Answer:

$200.0 is the cost for installing a carpet for a room that measures 12.0 feet by 15.0 feet.

Explanation:

Length of the room = l = 15.0 ft = $\frac{15.0}{3} yard=5.0 yard$

Width of the room = w = 12.0 ft = $\frac{12.0}{3} yard=4.0 yard$

(1 yard = 3 feet)

Area of the room = l × w = $4.0 yard\times 5.0 yard = 20.0 yard^2$

Cost for installing a carpet for a room = $10 per square yard

Cost for installing a carpet for a room wit area 20.0 square yard :

$20.0 yard^2\times $10/ yard^2=$200.0$

$200.0 is the cost for installing a carpet for a room that measures 12.0 feet by 15.0 feet.

7 0

3 years ago

which term is used when sugar is completely dissolved in water

GaryK [48]

The term which is used is homogeneous.
when sugar is completely dissolved in the water, the mixture or solution homogeneous, both in same phase and same uniform texture that is liquid.
There two types of mixtures are heterogeneous and homogeneous in different phases.
If sugar is not completely dissolved in water and you see the crystals of sugar in water, then the solution will be heterogeneous.

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4 years ago

There are four different starting molecules that one might use to synthesize the illustrated alkyl halide as the major product u

Mkey [24]

Answer:

Explanation:

An electrophilic addition reaction occurs when an electrophile attacks a substrate, with the end result being the inclusion of one or many comparatively straightforward molecules along with multiple bonds.

In the given question, the hydrogen bromide provides the electrophile while the bromide is the nucleophile. The mechanism proceeds with the attack of the electrophile on the carbon, followed by deprotonation. This process is continued with a formation of carbocation and the bromide(nucleophile) finally bonds to the carbocation to form a stable product.

The first diagram showcases the possible various starting molecules for the synthesis while the second diagram illustrates their mechanism.

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2 years ago