Describe 3 properties of Halogens on the periodic table
Answer:
Halogens are nonmetals. At room temperature, fluorine and chlorine are gases and bromine is a liquid. Iodine and astatine are solids. Halogens are very reactive, the reactivity decreases from fluorine to astatine.
Explanation:
An important bacteria for human survival produces vitamin K.
Which statement best describes how a catalyst can speed up a chemical reaction?
The catalyst decreases the activation energy needed.
The catalyst increases the concentration of products.
The catalyst binds to enzymes to release substrates.
The catalyst increases the concentration of reactants.
Explanation:
The catalyst decreases the activation energy needed.
Catalyst can speed up a chemical reaction by decreasing the activation energy needed. Thus option a is correct.
What is catalyst?Catalyst is defined as a material that allows a chemical process to happen under new circumstances or at a typically faster rate.
It can also be defined as an additive ingredient that can speed up a reaction without being consumed during the process.
There are basically four types of catalyst.
Homogenous catalystHeterogenous catalystHeterogenized homogenous catalystBiocatalystNickel, When making margarine out of palm oil, Ni is employed. In the Haber process, iron (Fe) is employed etc. are some of the example of catalyst.
Thus, catalyst can speed up a chemical reaction by decreasing the activation energy needed. Thus option a is correct.
To learn more about catalyst , refer to the link below:
https://brainly.com/question/12260131
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______ tend to effect the whole body.
A. Phototoxins
B. Endotoxins
C. Myotoxins
D. Exotoxins
Answer:
endotoxins
Explanation:
because they are inside of the body
What is the relationship between changing CO2 emissions and CO2 concentration?
Answer: When the carbon dioxide concentration goes up, temperature goes up. When the carbon dioxide concentration goes down, temperature goes down.
Explanation:
Which of the following landforms is not made by groundwater erosion?
A. stalactites
B. stalagmites
C. mountains
D. sinkholes
Answer:
mountains?
Explanation:
Answer: Mountains
Explanation: Groundwater erodes rock beneath the ground surface, especially carbonate rock. Groundwater deposits material in caves to create stalactites, stalagmites, and columns. And we know that a sink whole is also known as a cenote, sink, sink-hole, swallet, swallow hole, or doline, is a depression or hole in the ground caused by some form of collapse of the surface layer. Most are caused by karst processes – the chemical dissolution of carbonate rocks or suffosion processes
What does carrier mean
Answer:
a large warship that carries planes and has a long flat deck for takeoffs and landings
Explanation:
a person or thing that carries, holds or conveys something.
If the ocean floor is spreading and Earth is not getting any bigger, where is crust being destroyed?
Crust is being destroyed in earth
Is wood a living thing or non living? And why?
Answer:
wood is non living
Explanation:
it was once living because it came from a tree
Considering the temperature vs. time graph below, how does the temperature at the beginning of a change of state compare with the temperature at the end of the change?
The temperature is always lower.
The temperature is always the same.
The temperature is usually lower.
The temperature is usually higher.
Answer:
where's the graph man...... Also very complicated question...
Explanation:
With graph only it can be done...Answer:
The temperature is always lower.
Explanation:
What’s 2 similarities and 2 differences between the Earths layers and the atmospheric layers?
Answer:
Atmosphere layers. Earth's atmosphere is divided into five main layers: the exosphere, the thermosphere, the mesosphere, the stratosphere and the troposphere. The atmosphere thins out in each higher layer until the gases dissipate in space.
Explanation:
The atmosphere has 4 layers: the troposphere that we live in near the surface of the earth; the stratosphere that houses the ozone layer; the mesosphere, a colder and lower density layer with about 0.1% of the atmosphere; and the thermosphere, the top layer, where the air is hot but very thin.
Define evolution and determine the mechanism behind it
Soil texture is determined by the amount and distribution of mineral particles.
T or F
Answer:
TRUE
Explanation:
Took the quiz and got it right.
PLZ HELP ITS DUE RIGHT NOW !!!
Answer:
B. The expression of the genetic code is a regulated process
tRNA molecules are recyclable
1.True
2.False
Suppose u wanted ketchup to flow faster. What could u do to change its viscosity? Make connections to the particle theory of matter in ur answer
Answer:if you want it to be faster add water
Explanation:
Which of the statements are characteristics of a good hypothesis? -is developed from data that cannot be replicated -relies heavily on cutting edge technology -is created from careful research and logical reasoning -is based only on a presentation by an expert in the field -is able to be tested using validated techniques
Answer:
is created from careful research and logical reasoning
is able to be tested using validated techniques
Explanation:
A hypothesis can be defined as a prediction/expectation that is made in order to understand a phenomenon from the real world. This prediction must be testable and measurable by using the scientific method. In science, a good hypothesis clearly defines the relationships between two or more variables (independent variables and dependent variables). Moreover, a good hypothesis must also be written in simple and precise language, which means that its statements must be understandable (and verifiable) for any person and/or researcher working in the field.
What are two kinds of molecules that make a good model of a solid dissolving in a liquid?
Answer:
In the simplest case it involves mixing two materials together. The most common examples of dissolving involve a solid and a liquid, usually water. When a solid dissolves the solid (solute) and the liquid (solvent) form a very close intimate mixture called a solution.
Explanation:
How can a temporary lake create salt flats in Death Valley?
Answer:
A temporary lake create salt flats in Death Valley when Holocene lakes began to evaporate.
Explanation:
"Each time it has rained since, a new layer has been added. The flat is a vast area covered in salt that was deposited from evaporated water. When the water runs down the mountain, it dissolves minerals that precipitate out as the water evaporates."
Hope this helped!
Have a supercalifragilisticexpialidocious day!
Which of the following will lead to fewer deaths of large numbers of animals in an area? Select one: People polluting the land, causing the animals to get sick. People taking the land to build new houses, causing the animals to lose space to live and find food. People removing too many nutrients and resources from the land, causing the animals not to have any food. People building homes in a smaller area.
Answer: People polluting the land,
Explanation:
People pollute the land every day and the land and ocean is never ending with animals and sea animals, and this can’t be stopped.
other options, animals can provide for themselves because they are made for the wild hope this helped...
Two plants were being tested for growth. Both were given water and proper soil, etc. However, one was placed in the closet, and one was placed in the window sill. Why did the one in the closet die? Question 4 options: It was not around other plants. It was not around people enough. It did not receive sunlight. It did not have chloroplasts.
Answer:
It did not receive sunlight
Explanation:
For photosynthesis to occur, there is a chemical equation it follows
carbon dioxide + water + sunlight -> (yields) glucose + oxygen
This equation requires the sun to create glucose. The sun provides the energy for the plant to feed itself and grow.
Answer:
c
Explanation:
I took the test
1. Do you think it is fair that Watson and Crick were credited with the discovery when so many other scientists were involved? Why or why not? Think about your opinion and then back it up with at least one fact.
Answer:
No.
Explanation:
I don't think it is fair that Watson and Crick were credited with the discovery when so many other scientists were involved because all other scientists also contributed in the work and work harder for it so the credit must be given to all scientists. If the credit will not given to other scientists so it is an unfair act so my opinion is against the credit given to Watson and Crick.
Daughter cells in meiosis will receive either ALL chromosomes from the father or ALL from the mother
True or False
________% of your cells contain mom and dad’s DNA.
Answer:
51% from their mother and 49% from their father.
This is your main source of energy; it can be simple or complex.
Answer:
the main source of energy is the sun
Question 8 Oxidation, hydrolysis, acid precipitation, and carbonation are examples of abrasion. erosion. O chemical weathering. O mechanical weathering.
Essential Question: How do
substances move across a
selectively permeable membrane? I
Answer:
Semipermeable membranes, also termed selectively permeable membranes or partially. permeable memebrans, allow certian molecules or ions to pass through by diffusion. while diffusion transports materials across membrans and within cells, osmosis transports only water across membrane.
search up a site could quillbot.
copy the answer so it can traslate it in your own words.
what are the advantages of adaptation ?enlist in points
Answer:
The economic benefits of adaptation are many: sustained or increased agricultural production, higher household incomes, enhanced environmental services, protection of the asset base, and less vulnerability to extreme weather events.
Answer:
this answer may help you
Write a lab report for this lesson’s lab.
Explanation:
what's the lesson can u show uss
Answer:
whats the lesson? You cant just write a lab report out of the blue what is the lab about?
Explanation:
Researchers are not making any progress in treating or curing AIDS. Please select the best answer from the choices provided T F
Answer:
True.
Explanation:
Researchers and scientists are not making any progress in treating or curing AIDS because the virus incorporates itself into the host cell's DNA and the medication is unable to reach that place so the virus is safe from the medication and remains in the host cells. This diseases can't be cure but can be prevented of spreading further in the body through medication such as antiretroviral therapy (ART).
