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
andrey2020 [161]
3 years ago
13

Need help with question 1 a b and c also question 3 ASAP help needed

Chemistry
1 answer:
Mariulka [41]3 years ago
5 0
What grade are you in because im in eighth grade and that is hard
i cant even look up the answer online

You might be interested in
A pure substance where atoms of two or more elements are chemically bonded to one another
inn [45]
Compound is a pure substance where atoms of two or more elements are chemically bonded togather
8 0
2 years ago
1. Which of the following parts allow different activities of the cell to happen? A cytoplasm C vacuole B. lysosome D. vesicle 2
Anna35 [415]

Answer: A. Cytoplasm

Explanation: Cytoplasm is a jelly, like material that fills up the remaining space in the cell. It is also responsible in making the shape of the cell. Without it, other parts of the cells or the organelles cannot make its function because it serves as the hallway of the transportation of the nutrients needed by each cell.

Learn more: https://brainly.ph/question/73078

4 0
2 years ago
Why is dilute, not concentrated, hydrochloric acid used during preparation of cyclohexaanol?
lorasvet [3.4K]
I think <span>500 m but i just think i dont know </span>
3 0
2 years ago
What is the mass sample of 0.0500 moles of zinc chloride ?
vlabodo [156]

Answer:

6.82g

0.59moles

Explanation:

1. What is the mass sample of 0.0500 moles of zinc chloride ?

Given parameters:

Number of moles ZnCl₂ = 0.05moles

Unknown:

Mass of the sample  =  ?

Solution:

To find the mass of a substance using the number of moles, it would be pertinent to understand what mole is.

A mole is a substance that contains the avogadro's number of particles.

It relates to the mass using the expression below;

                Mass of a substance  = number of moles x molar mass

Molar mass of  ZnCl₂;

        Atomic mass of Zn  = 65.4g/mol

                                   Cl = 35.5g/mol

Molar mass = 65.4 + 2(35.5)  = 136.4g/mole

Mass of a substance  = 0.05 x 136.4  = 6.82g

2. How many moles of potassium sulfide are in a 65.50g sample?

Given parameters:

Mass of K₂S  = 65.5g

Unknown:

Number of moles  = ?

Solution:

The number of moles of any substance is related to mass using the expression below;

              Number of moles  = \frac{mass}{molar mass}

Molar mass of K₂S  = 2(39) + 32  = 110g/mol

              Number of moles  = \frac{65.5}{110}   = 0.59moles

8 0
3 years ago
(14.1.50) 0.03 mol of helium are enclosed in a cylinder with a piston which maintains a constant pressure in the helium. Initial
icang [17]

Answer:

a) 0.210 j /k

b) 0.032 j/k

Explanation:

Find the attachment for solution

3 0
3 years ago
Other questions:
  • A solution with higher pH levels is more
    8·2 answers
  • In the experiment, you added water to the reaction vessel after the reaction was complete, but we did not discuss why. Based on
    5·1 answer
  • A balloon is filled with helium at sea level. The volume was measured to be 3.1 liters at a pressure of 0.97 atmosphere. If the
    7·2 answers
  • how many moles of zinc cholride are produced from the reaction of three moles of xinc and an excess of hydrocholric acid
    7·1 answer
  • The periodic table is based on an element's
    11·1 answer
  • What is an effect of gravity on objects on the surface of Earth? Check all that apply.
    14·2 answers
  • In this experiment, you will measure all masses in
    5·1 answer
  • If a Cod Fish Parent has 82 Chromosomes in its Body Cells, how many
    15·1 answer
  • A solution has a pH of 2. Which best describes the solution? A strong acid, a strong base, a neutral solution, a weak base
    12·2 answers
  • No longer need to be answered.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!