PLEASE HELP ME, 20 POINTS

Chemistry

1 answer:

Marrrta [24]2 years ago

4 0

Explanations:

Question 1: Lithium in 20.00+ g is C. or D., but 25.00+ g is D. which means this is the correct option.

I am unsure of Question 2. I don't think it is mole though.

Question 3: Boron in 25.00-30.00 g is B. or D., but 25.00 g would be C.

Question 4: 2.393 x 1024 atoms of Oxygen is 63.58 mole O. I don't know for sure, but I think this is correct.

I am NOT professional. There is a chance I am incorrect. Please reply to me if I've made a mistake.

You might be interested in

A chemical reaction that releases heat to the surroundings is said to be __________ and has a __________ H at constant pressure

Savatey [412]

Answer:

The correct option is c) exothermic, negative.

Explanation:

Reactions that releases heat to the surroundings are called exothermic, and are characterized by negative entalpy (ΔH) values.

6 0

3 years ago

Choose the term that best describes the following statement: a system in equilibrium will oppose a change in a way that helps re

Scorpion4ik [409]

Le Chatelier's principle (D)

3 0

3 years ago

Z forms chloride compounds with the formulae ZCl2 and ZC13.

nordsb [41]

Answer:

(B) II, IV.

hope this answer is helpful for u.

3 0

2 years ago

What devices will you use to measure the mass and the volume in this experiment? (density)

bekas [8.4K]

Answer:

Methods for determining or delivering precise volumes include volumetric pipets and pycnometers; less precise methods include burets, graduated cylinders, and graduated pipets. In this experiment, you will measure masses and volumes to determine density. Four different metal cylinders are investigated.

Explanation:

8 0

2 years ago

Complete the sentence indicating the number of protons and electrons in the given ion. Match the numbers in the left column to t

Cloud [144]

Answer: (Chlorine-35)

Element X is Ca

Explanation:

Number of proton plus the number of electron gives the mass number.

5 0

3 years ago