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
Lena [83]
2 years ago
15

Sailors used the _______________________ and _______________________ as fixed-points to help them navigate. The ________________

__ was invented by the Chinese and was later used by European explorers for navigation. WILL GIVE BRAINLIEST OR CASH
'science...
Chemistry
1 answer:
tatyana61 [14]2 years ago
4 0

Hey there ;)

<em>T</em><em>o</em><em> </em><em>f</em><em>i</em><em>n</em><em>d</em><em>:</em><em>-</em><em> </em>Fill in the blanks

<em>A</em><em>n</em><em>s</em><em>w</em><em>e</em><em>r</em><em>:</em><em>-</em>

Sailors used the <u>astrolobe</u> and <u>nautical</u><u> </u><u>c</u><u>h</u><u>a</u><u>r</u><u>t</u><u>s</u> as fixed-points to help them navigate. The <u>compass</u> was invented by the Chinese and was later used by European explorers for navigation

You might be interested in
In naming the compound PCl5, the prefix used with the second element is ____________________.
Oksanka [162]

Answer:

\boxed {\boxed {\sf Hepta}}

Explanation:

We are given the formula:

PCl_5

This is a molecular formula, because it contains nonmetals.

1. Name the first element

The first element is phosphorous (P). Since this is the first element and there is only one, we don't need a prefix.

  • Phosphorous

2. Second element

The second element is chlorine (Cl). It has a subscript of 5, so we must add the prefix of <u>hepta</u>-.

  • Phosphorous heptachlorine

Add the ending of -ide.

  • Phosphorous heptachloride

The prefix used for the second element is hepta. The compound name is phosphorous heptachloride.

6 0
2 years ago
Which of these electron transitions correspond to absorption of energy and which to emission?
Keith_Richards [23]

The electron transitions representing absorption of energy are:

(a) n = 2 to n = 4

(d) n = 3 to n = 4

and those which represents emissions of energy are:

(b) n = 3 to n = 1

(c) n = 5 to n = 2

An electron emits energy when it jumps from a higher energy level to a lower energy level transitions.

An electron absorbs energy to jump from a lower energy level to a higher energy level transitions.

(a) n = 2 to n = 4

Here, the initial level (2) is lower than the final level (4).

Hence energy is absorbed.

(b) n = 3 to n = 1

Here, the initial level (3) is higher than the final level (1).

Hence energy is released.

(c) n = 5 to n = 2

Here, the initial level (5) is higher than the final level (2).

Hence energy is released.

(d) n = 3 to n = 4

Here, the initial level (3) is lower than the final level (4).

Hence energy is absorbed.

The question is incomplete. Find the complete question here:

Which of these electron transitions correspond to absorption of energy and which to emission?

(a) n = 2 to n = 4

(b) n = 3 to n = 1

(c) n = 5 to n = 2

(d) n = 3 to n = 4

Learn more about electron transitions at brainly.com/question/2079874

#SPJ4

4 0
2 years ago
Click on the molecules that represent transpiration.
timurjin [86]
Transpiration is the progression of <em>water </em>inside a plant! So, the molecule representing transpiration is going to be good ol' H2O! =)
8 0
3 years ago
२<br> 1. A ratio of the parts of a mixture are exact true or false.
Xelga [282]
False. mixtures dont have specific ratios
6 0
3 years ago
Read 2 more answers
A compound has an empirical formula of AB and a molar mass of 90 g/mol. What is its
Lelu [443]

Answer:

A3B3

Explanation:

Molecular formula = n x empirical formula

(AB) n = 90

MM of AB = 30 g/mol

30n = 90

Divide both side by the coefficient n i.e 30

n = 90/30 = 3

Molecular formula = n x empirical formula

Molecular formula = n x (AB)

Molecular formula = 3(AB) = A3B3

8 0
3 years ago
Other questions:
  • Why is carbon the basis for the many different kinds of organic molecules? Select all that apply. A. It can connect with several
    5·1 answer
  • Given following electron configurations, 1s22s22p63s23p64s23d104p65s24d9 and 1s22s22p63s23p64s23d104p65s14d10.
    14·1 answer
  • Density can be calculated by dividing the mass of an object by its volume. Water has a density of 1g/ml. If an object’s density
    13·2 answers
  • Which of the following are major influences on weather and climate?
    8·1 answer
  • The smallest unit which maintains the physical properties of a compound is a(n) _____.
    15·1 answer
  • The rainforest contains what percentage of all of the species in the world?
    13·2 answers
  • How is the water cycle realated to weather patterns and climate? Make sure to put 2 evidences
    9·1 answer
  • If the gold in the crown was mixed with a less-valuable metal like bronze or copper, how would that affect its density?
    15·1 answer
  • Answer with correct significant figures (*no scientific notation): 847.3219 x 34.6 x 1.4560 =
    8·1 answer
  • What is the mass number of 19/9F?<br> Your answer:<br> A. 9<br> B. 10<br> C. 19<br> D. 28
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!