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
harina [27]
3 years ago
11

PLEASE HELP ME !

Chemistry
2 answers:
tekilochka [14]3 years ago
4 0

Answer:

False

Explanation:

Emectromagnetic waves are slowed down by even the most transparent of mediums.

Anna11 [10]3 years ago
3 0

Answer:

False

Explanation:

You might be interested in
What is the percent composition of phosphoric acid H3PO4
Agata [3.3K]
Hey there!:

Molar mass H3PO4 = <span>97.9952 g/mol

Atomic Masses :

H = </span><span>1.00794 a.m.u

</span>P = <span>30.973762 a.m.u

</span>O =  15.9994 a.m.u<span>

H % =  [ ( 1.00794 * 3 ) / </span> 97.9952  ]  * 100

H% = <span>3.0857 %

P % = [ ( </span>30.973762 * 1 ) / 97.9952 ] * 100

P% = <span>31.6074 %

O % = [ ( </span>15.9994 * 4 ) / 97.9952 ] * 100

O% = <span>65.3069 %


Hope this helps!</span>
5 0
3 years ago
5. Name five plants and animals that lived in ancient Antarctica
Andrew [12]

Answer:

Two hundred million years ago, Antarctica was a lush, temperate rainforest home to crocodile-sized amphibians and rhinoceros-sized dinosaurs.

Explanation:

Animals:

1 ankylosaurs (the armored dinosaurs), mosasaurs and plesiosaurs (both marine reptilian groups).

2 Cry-oloph-os-auru-s was the ap-ex pre-da-tor of its region when it hunted in the lands of Jur-as-sic Period Antarctica.

3 plesiosaurs.

4 mosasaurs.

Plants:

1 palm trees.

2 ferns and Tanglefoot.

3 Evergreen trees

4 Glossopteris

8 0
2 years ago
-
mart [117]

Answer:

reaction B is the best one I would choose

3 0
3 years ago
Pls help I’ll mark brainliest pls pls pls
katovenus [111]
The tea was no longer hot or (brewed) so the 5th didn’t dissolve like the others because the tea was hot or warm enough anymore it cooled down. So the sugar won’t dissolve no more.
7 0
3 years ago
Read 2 more answers
Thermochemical equations are chemical equations that include the __________ of the reaction.
irga5000 [103]

A Thermochemical Equation is a balanced stoichiometric chemical equation that includes the enthalpy change, ΔH. In variable form, a thermochemical equation would look like this:

A + B → CΔH = (±) #

Where {A, B, C} are the usual agents of a chemical equation with coefficients and “(±) #” is a positive or negative numerical value, usually with units of kJ.


please mark as brainliest

5 0
3 years ago
Other questions:
  • 3.8x10^-4 g is dissolved into 450g of water . Find the concentration in ppm
    10·1 answer
  • Consider 80.0-g samples of two different compounds consisting of only carbon and oxygen. One of the compounds consists of 21.8 g
    6·1 answer
  • Engineers increase output in crop production by combining the strengths of
    6·1 answer
  • A reaction mechanism is defined as the sequence of reaction steps that define the pathway from reactants to products. Each step
    13·1 answer
  • Which is a strong base? HCl NaOH NH3 H3CO3
    8·1 answer
  • Based on the table, which city was in danger of flooding?
    10·1 answer
  • 1.
    13·1 answer
  • How many neutrons does iodine have
    11·2 answers
  • Directions for a lab require heating a reactant to a temperature of 363.6 K. However, the only thermometer available reads in de
    6·1 answer
  • Mixed aldol condensations involving benzaldehyde yield typically a single product. draw the structure of the partner that was us
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!