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babymother [125]
3 years ago
5

You left a glass full of water by a window in your house in the morning. Three hours later you walk by the glass, and the water

level is significantly lower than it was in the morning. You have made the observation that the water level in the cup is lower. Then, you ask the following question: “Why is the water level in the cup lower?” What is a possible hypothesis you could make?
Chemistry
1 answer:
Sergeu [11.5K]3 years ago
7 0
“If a glass of full water is placed by a window and 3 hours go by, then the water in the cup will be lower because the water will evaporate.”
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Help PlS AFAP and thank you so much
Triss [41]

Answer:

B

Explanation:

idk how to explain, B is the definition of conduction

8 0
3 years ago
Read 2 more answers
A student was assigned the task of determining the identity of an unknown liquid. The student weighed a clean, dry 250-mL Erlenm
LiRa [457]

Answer:

248.4 mL

Explanation:

Erlenmeyer = 78.649 g

Erlenmeyer + Water = 327.039 g

Water = (Erlenmeyer + Water) - Erlenmeyer

Water = 327.039 - 78.649

Water = 248.4 g

if the density of water is 1 g/mL, we can say that each mL of water weigh 1 g, so we have 248.4 mL of water in the Erlenmeyer Flask.

4 0
3 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.

6 0
2 years ago
Help would be majorly appreciated
Sophie [7]

Answer:

a) the atomic number is 15

b) the mass number is 15+16 = 31

c) element is phosphorus

d)Group 15 period 3

6 0
3 years ago
What are some physical charters tics scientist use to classify vertebrates
Veseljchak [2.6K]

Answer:

They are warm-blooded. They have a bony internal skeleton with a backbone and jaws. They breathe only with lungs. They have four limbs.

Explanation:

7 0
3 years ago
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