20 Points!! 10 Each Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!

Chemistry

2 answers:

True [87]3 years ago

5 0

Answer:

18.B

19.B

20.D

21.A

Explanation:

emmasim [6.3K]3 years ago

3 0

Answer:

1.a 2.d 3.c 4.b

Explanation:

You might be interested in

Check the approach to obtain the correct conversion equation. Use the temperature in °F to find the temperature in °C.

Maru [420]

Answer:

( °F − 32) × 5/9 = °C

Explanation:

Also there is a mental calculation to convert from Fahrenheit to Celsius. The ratio 5/9 is approximately equal 0.55555….

Subtract 32º to adapt the equivalent in the Fahrenheit scale.

Divide the degrees Celsius by 2 (multiply by 0.5).

Take 1/10 of this number (0.5 * 1/10 = 0.05) and add it to the number obtained previously.

Example: Convert 98.6º F to Centigrade.

98.6 - 32 = 66.6

66.6 * 1/2 = 33.3

33.3 * 1/10 = 3.3

33.3 + 3.3 = 36.6 which is an approximation in degrees Centigrade

8 0

3 years ago

How can you use the Periodic Table of Elements to help you find information about specific elements? PLZZZ HELP MEEEEEE!!!!

elena-14-01-66 [18.8K]

Answer:

Yuh imma help-........

6 0

3 years ago

Write a balanced chemical equation for the standard formation reaction of liquid acetic acid hch3co2.

Afina-wow [57]

The balanced chemical equation for the standard formation reaction of liquid acetic acid is given as ,

$2C(gr) +2H_{2} (g) +O_{2} (g)$ → $CH_{3} COOH(l)$

The reaction that form the products from their elements in their standard state is called formation of reaction .The acetic acid consist C , H , and O , So, determine their standard state . Carbon is graphite at 25°C and 1 atm , whereas hydrogen and oxygen are diatomic gases . Hence , we start with unbalanced reaction.

$C(gr) +H_{2} (g) +O_{2} (g)$ → $CH_{3} COOH(l)$