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Natasha2012 [34]
3 years ago
11

Which of the following would SLOW DOWN the rate of chemical

Chemistry
1 answer:
USPshnik [31]3 years ago
7 0

Answer:

increasing rainfall. hope it help

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C8H10N4O2 is the chemical formula for caffeine, there are 8 carbons. List the 3 remaining elements in caffeine and how many atom
Nataly [62]
Caffeine   that  is C8H10N402  is molecule which made   up  of   4 different elements. apart  from  carbon  the  other  element  includes

element        symbol
nitrogen          N
oxygen           O
hydrogen        H
The number  of  atom  present in caffeine molecule  are  as follows

Nitrogen=4  atoms
Oxygen=2  atoms
Hydrogen=10 atoms

4 0
3 years ago
15
Iteru [2.4K]

Good electrical conductivity and electronegativities less than 1.7 are the properties and characteristic of Group 2 elements at STP.

<h3>What are the properties of group 2 elements?</h3>

Group 2 elements are metals so they are good conductors of heat and electricity. It has electronegativity values less than 1.7 and very reactive. They form 2+ charge in cationic form and also formed ionic bonds with other negatively charged elements.

So we can conclude that good electrical conductivity and electronegativities less than 1.7 are the properties and characteristic of Group 2 elements at STP.

Learn more about electronegativity here: brainly.com/question/2415812

#SPJ1

6 0
1 year ago
Reaction rates are affected by how often the particles collide<br><br> true<br><br> false
SIZIF [17.4K]
This is true.

The reaction rates are affected by how often the particles collide.
4 0
3 years ago
Read 2 more answers
There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 14.55%. A weighted average uses the percen
alekssr [168]

Answer:

2.765amu is the contribution of the X-19 isotope to the weighted average

Explanation:

The average molar mass is defined as the sum of the molar mass of each isotope times its abundance. For the unknown element X that has 2 isotopes the weighted average is defined as:

X = Mass X-19 * Abundance X-19 + MassX-21 * Abundance X-21

The contribution of the X-19 isotope is its mass (19.00 amu) times its abundance (14.55% = 0.1455). That is:

19.00amu * 0.1455 =

2.765amu is the contribution of the X-19 isotope to the weighted average

8 0
2 years ago
Mg + 2HCl ⟶ MgCl2 + H2
Ivanshal [37]

Answer: m = 24.31 g/mol · 1.13 mol

Explanation: 2 mol HCl use 1 mol Mg.

Magnesium is used 0.5 · 2.26 mol = 1.13 mol

M(Mg) = 24.31 g/ mol

7 0
2 years ago
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