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White raven [17]
3 years ago
11

A coiled spring with coils that are closely spaced then widely then closely then widely then closely, ending with a yellow line

labeled 1 second.
What is the frequency of this wave?

1
2
3
4
Chemistry
2 answers:
Lana71 [14]3 years ago
5 0

Answer:

2

Explanation:

Kobotan [32]3 years ago
4 0

Answer:

2

Explanation:

got it right on a unit test on 3d3nuity

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The formula for a compound of Li+ ions and Br- ions is written LiBr. Why can’t it be written Li2Br? Why isn’t it written BrLi?
maksim [4K]

Lithium has charge of +1 and bromide has charge of - 1. So they combine to form the compound lithium bromide which is expressed as LiBr.

<h3><u>Explanation:</u></h3>

Lithium is an alkali metal placed in group 1 or periodic table. It has a valency of 1 which is achieved as lithium loses an electron to achieve a charge of +1.

Bromine is a halogen which is placed in group 17 of periodic table. It has a valency of 1 which is achieved as bromine looses an election to achieve a charge of - 1.

Lithium is the cation and bromide is the anion. So lithium is written in front and bromine following the cation. And as both of their valencies are 1, so they form the compound LiBr.

3 0
3 years ago
How many liters of hydrogen gas are needed to react completely with 50.0 L of chlorine gas at STP ?
dolphi86 [110]

Answer:

50L of H2

Explanation:

First let us generate a balanced equation for the reaction

Cl2 + H2 —> 2HCl

From the equation above,

1L of Cl2 required 1L of H2 for complete reaction.

Therefore, 50L of Cl2 will also require 50L of H2 for complete reaction.

4 0
3 years ago
Pathogens grow well in food that has a temperature between
ad-work [718]

Answer:

freeze da food

Explanation:

cuz if u freeze it it turns cold

3 0
3 years ago
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Which country contributes the most green house gases to earth'satmosphere?
pshichka [43]
United states of america
5 0
4 years ago
QUESTION 4
Greeley [361]

Answer:

B) 2

Explanation:

There are two significant figures in given measurement,

2, 0

Significant figures:

1= The given measurement have four significant figures 1534.

2= All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.

3= Leading zeros are not consider as a significant figures. e.g. 0.03 in this number only one significant figure present which is 3.

4= Zero between the non zero digits are consider significant like 107 consist of three significant figures.

5= The zeros at the right side e.g 2400 are also significant. There are four significant figures are present.

7 0
3 years ago
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