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
My name is Ann [436]
3 years ago
8

Question 1 (4 points)

Chemistry
1 answer:
oee [108]3 years ago
4 0

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

Blank # 1 - keep safe distance from the burner

Blank # 2 - Place the equipments on the right place after use

Blank # 3 - perform experiments with proper lab equipment and safety tools

Blank # 4 - Don't break any test tube or lab equipment

(maybe it can be hazardous)

You might be interested in
Change in enthalpy when 11.2 dm3 of helium at ntp is heated in a cylinder to 100 degrees celsius
REY [17]

Answer:

Enthalpy change = 333.3 J

Explanation:

Given data:

Volume of helium = 11.2 dm³ or 11.2 L

Temperature = 100 °C (100+273= 373 K)

Enthalpy change = ?

Solution:

Normal temperature of room = 20°C (20+273 = 293 K)

one mole of gas occupy volume = 22.4 L

ΔT = final temperature - initial temperature

ΔT = 373K - 293K

ΔT = 80K

Number of moles of gas = 11.2 L/22.4 l

Number of moles of gas = 0.5 mol

Enthalpy change = nRΔT

Enthalpy change = 0.5 mol × 8.3j/mol.k ×80 K

Enthalpy change = 333.3 J

8 0
3 years ago
The image on the left shows a normal red blood cell, and the image on the right shows a cell that has been put into a new soluti
Neporo4naja [7]

Answer:

I think its "The water molecules move by active transport into the cell from high water concentration to low water concentration."

6 0
3 years ago
Read 2 more answers
Which describes a covalent bond?
Westkost [7]

Answer:

a

Explanation:

covalent bonds are bonds between two nonmetals where they share an electron :)

8 0
2 years ago
Percent composition?: 85.05 g of Mg combines completely with 112.21 g of S.
hammer [34]

Empirical Formula = C20 H60 HG1 S1 O4 (numbers should be in subscript)

Percent Composition =

MG = 43%

S = 56.8%

5 0
3 years ago
What is the purpose of a switch in an electrical circuit?
dmitriy555 [2]
The purpose of a switch in a series circuit is to make it easy to open or close the electrical circuit, turning the flow of electricity on or off. A light bulb in a series circuit is used to determine whether or not electricity is flowing.
6 0
3 years ago
Read 2 more answers
Other questions:
  • The gaia hypothesis is an example of
    10·2 answers
  • How many moles of solute are contained in a 250.0<br>ml solution with a concentration of 2.5m
    11·1 answer
  • Suggest a pH value for lemonade
    13·1 answer
  • Which of the following would have the highest viscosity?
    6·2 answers
  • A cell must work to maintain a stable internal environment. It is also important for the environment around the cell to be stabl
    7·1 answer
  • You are using a Geiger counter to measure the activity of a radioactive substance over the course of several minutes. If the rea
    5·1 answer
  • If 33.6 grams of KCl are dissolved in 192 grams of water, what is the concentration of the solution in percent by mass? (3 point
    9·1 answer
  • If the forces acting on an object are unbalanced, what will occur?
    11·1 answer
  • In general, the greatest variation happens in populations of organisms that reproduce_____.
    14·1 answer
  • A full moon appears on July 1: On what date is the next full moon likely to appear in the night sky?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!