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
frosja888 [35]
2 years ago
11

Cell membranes are selectively permeable. This means that A. only water can move freely across the cell membrane. B. any substan

ce can move across the cell membrane, but chemical energy will always be required. C. some substances can move freely across the cell membrane, while others must be transported. D. no substances can move freely across the cell membrane.
Chemistry
1 answer:
MaRussiya [10]2 years ago
6 0

Answer:

C. some substances can move freely across the cell membrane, while others must be transported.

Explanation:

You might be interested in
A 28-kg child can consume a maximum of 23 children's acetaminophen tablets in an 8-h period without exceeding the safety-limit m
Nesterboy [21]

Answer:

(b)90mg/lb

Explanation:

The child can consume a maximum of 23 tablets with 80mg of acetaminophen, the total acetaminophen ingest is:

23*80=1840mg

This value is for 8 hours, 8 hours is 1/3 of one day. This means that the dose that can be consumed in 24 hours is 3 times 1840mg.

1840*3=5520mg

To obtain the maximum allowable dose in mg per pound of body weight, divide this last value by the weight of the child in pounds.

Conversion of units: 28Kg(\frac{2.20lb}{1Kg} )=61.6lb

\frac{5520}{61.6} =89.61\approx90mg/lb

6 0
3 years ago
What is metal and non metal
Umnica [9.8K]

Answer:

Metals are good conductors of heat and electricity, and are malleable (they can be hammered into sheets) and ductile (they can be drawn into wire).  Most of the metals are solids at room temperature, with a characteristic silvery shine (except for mercury, which is a liquid).  Nonmetals are (usually) poor conductors of heat and electricity, and are not malleable or ductile; many of the elemental nonmetals are gases at room temperature, while others are liquids and others are solids.  

Explanation:

7 0
3 years ago
Read 2 more answers
38 When a sample of a gas is heated in a sealed, rigid container from 200. K to 400. K, the pressure exerted by the gas is
Kryger [21]
Increased by a factor of 200

8 0
3 years ago
PLEASE HELP ME ASAPP!!
aliina [53]

Conduction-

putting an icepack on injury

grabbing a warm coffee mug

burning yourself by touching boiling water

the handle of a pot being to hot to touch

Convection-

heat from a fire to warm hands

warm water rising to the surface of of the ocean etc.

warm air rising off pavement

an oven that cooks by cycling warm air through the bottom and out the top

Radiation-

cooking popcorn using microwave

heat from the sun hitting a solar panel

( i havent done science in a while cuz im homeschooled but i think most of these are correct)

good luck on what your working on !!

7 0
3 years ago
Which instrument is used to measure the gain or loss of heat?
Elza [17]
The answer is c. Calorimeter
8 0
3 years ago
Read 2 more answers
Other questions:
  • What term defines the specific amount of time required for half of a radioactive substance to become stable?
    15·2 answers
  • Quantum numbers arise naturally from the mathematics used to describe the possible states of an electron in an atom. The four qu
    11·1 answer
  • How many atoms are in 0.8 mols of lead?<br> show work.
    10·1 answer
  • What volume would 8.01×1022 molecules of an ideal gas occupy at STP?
    7·1 answer
  • Which of the following covalent bonds is the strongest?
    8·1 answer
  • What are the The properties of solids, liquids and gases are explained by
    5·1 answer
  • 1.50 moles of argon are at a pressure of 4.125 atm and a temperature of -38.0 degrees C. What is the volume of the sample?
    14·1 answer
  • Adenosine triphosphate is the energy source for work in the cell. It provides energy to the cell and ?
    11·1 answer
  • Lead (II) acetate reacts with sodium hydroxide to produce lead (II) hydroxide and sodiumacetate. Please write the chemical equat
    14·1 answer
  • a 4.4 g sample of gas occupies 2.24 l of volume at stp. without thinking too hard, what is the mw of the gas, and name two gases
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!