1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vitek1552 [10]
2 years ago
14

Science (Grade 8)

Chemistry
1 answer:
slega [8]2 years ago
8 0

Answer:

1. Frictional. 2. Gravitational. 3. Concrete road. 4.0N

You might be interested in
How many Electrons, Neutrons & Protons do
EastWind [94]

Answer:

sodium

protons:11

neutrons:12

electrons:11

nitrogen

protons:7

neutrons:7

electrons:7

6 0
3 years ago
Read 2 more answers
Outline how fresh water could be extracted from salt water if fresh water was no longer available.
leva [86]

You can boil the salt water. The water will evaporate while the salt will be left behind because it's a solid. Salt has a much higher boiling point than water (2,575° F), so that's why it won't evaporate with the water.

8 0
3 years ago
Opening a soda bottle illustrates how a decrease in pressure will___the amount of gas that can be dissolved in water.
strojnjashka [21]
C. Increase :)
I would choose C
3 0
3 years ago
Read 2 more answers
a prescriber has ordered childrens motrin 400 mg po q6h for a child who weighs 60 kg. how many mg/kg is the child receiving
DedPeter [7]

Answer:

6.67 mg/kg     per dose   ( 26.67 mg/kg   per day)

Explanation:

400 mg / 60 kg = 6 2/3  mg/kg  per dose

   per <em>DAY</em>  is  four times this number

5 0
1 year ago
The reaction of pyrrole with bromine forms predominantly __________. View Available Hint(s) The reaction of pyrrole with bromine
xenn [34]

Answer:

a) 2-bromopyrrole

Explanation:

Our options for this questions are:

a) 2-bromopyrrole

b) 2,3-dibromopyrrole

c) N-bromopyrrole

d) 3-bromopyrrole

To understand how the reaction works we have to start with the <u>resonance structures</u>. (Figure 1), on these structures, we will obtain a n<u>egative charge on carbon 2</u> in the pyrrole ring, therefore on this carbon we can generate an attack to an electrophile.

The second step is to check how the mechanism take place. An <u>electrophile is generated</u> by the Br_2 and FeBr_3. This electrophile can be <u>attacked</u> by the negative charge on carbon 2 producing the 2-bromopyrrole. (See figure 2).

I hope it helps!

5 0
3 years ago
Other questions:
  • One way to measure temperature in some applications is to monitor the gas pressure in a rigid, closed container. What is the tem
    6·1 answer
  • a certain metal hydroxide, m(oh)2, contains 32.8% oxygen by mass. what is the identity of the metal m?
    9·1 answer
  • Give criteria in terms of temperature changes for exothermic and endothermic reactions
    10·1 answer
  • Plants need sunlight to make food during the process of:
    9·1 answer
  • Which chemical change is most likely to involve bubbling or an odor? A. temperature decrease B. color change C. gas production D
    14·1 answer
  • Given that the antacid milk of magnesia contains 400. mg of Mg(OH)2 per teaspoon, calculate the number of milliliters of stomach
    7·1 answer
  • What happens when liquid changes to gas?
    15·1 answer
  • Write a hypothesis to answer the lesson question
    13·1 answer
  • Bees help flowers reproduce through a process called __________. *
    8·1 answer
  • What is the molar mass of Cr3(AsO4)2?<br> g/mol
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!