Answer:The pure substance within chemistry is a very simple concept to grasp. Pure substances are defined as substances that are made of only one type of atom or only one type of molecule (a group of atoms bonded together). ... Purity can also have an important impact on the chemical properties of a substance.
Explanation:
You should wear eye Protection
Wear Gloves and wash hands after the investigation.
Lead bromide is toxic and dangerous for the environment.
Bromine is corrosive, toxic and very dangerous for the environment.
the area. The scientist wants to conduct a study that will measure the change in the
local mosquito population over a period of three months. Which research method
would give the scientist the best data for conducting his study?
A. a three-month case study observing the behavior of animals that depend on
mosquitoes for food
B. a survey asking residents about their observations of the local mosquito
population
C. a collection device in the area that counts the number of mosquitoes caught
weekly
D. a controlled lab experiment with mosquitoes that limits watercolor the
experimental group
Answer: (C.) a collection device in the area that counts the number of mosquitoes caught
weekly
Explanation: I took the test :D
The most suitable research method for measuring a change in the mosquito population due to construction would be 'a collection device in the area that counts the number of mosquitoes caught weekly'. This method provides quantifiable, reliable data over the three-month study period.
To thoroughly study the change in the local mosquito population due to the construction, the most suitable research method for the scientist would be to use 'a collection device in the area that counts the number of mosquitoes caught weekly' (option C). This method would provide direct, quantifiable data about the mosquito population, showing changes on a weekly basis over the three-month study period.
A case study (option A) would not provide direct data about the mosquito population. Instead, it would provide indirect observations through the behavior changes of animals that prey on mosquitoes. Similarly, a survey (option B) relies on residents' subjective observations, which may not be reliable or accurate. Finally, a controlled lab experiment (option D) does not account for the plethora of variables present in a natural environment, thus limiting its effectiveness in this situation.
#SPJ12
A landscape is said to be altered if its topography, vegetation, or general appearance are changed or modified.
An region of land's visible characteristics are referred to as its landscape, which includes both natural features like mountains, rivers, woods, and plains as well as man-made features like buildings, highways, and bridges. The distinctive appearance of a place is created by the interaction of built and natural factors. In addition to being visually appealing, landscape also has significant cultural, social, and ecological aspects. In order to capture its beauty and distinctiveness, it acts as a source of inspiration for writers, artists, and photographers. A community or region's identity, traditions, and feeling of place are all significantly shaped by the landscape.
To know more about landscape, here:
#SPJ6
10 HSiCl3+ 15 H2O→H10Si10O15+ 30 HCl
Explanation:
Step 1: To make Si equal on both sides. put 10 in front of HSiCl3
10 HSiCl3+ H2O →H10Si10O15+ HCl
Step 2: By putting 30 in front of HCl, Cl can be balanced
10 HSiCl3+ H2O →H10Si10O15+ 30 HCl
Step 3: Now, balance O by putting 15 in front of H2O
10 HSiCl3+ 15 H2O→H10Si10O15+ 30 HCl
Hence the balanced equation is:
10 HSiCl3+ 15 H2O→H10Si10O15+ 30 HCl