Answer:
Hypothesis---experiments----results----conclusion.
Explanation:
First we make a hypothesis means a statement about why the tree looks unhealthy. In this segment of scientific method we have to test the hypothesis through experimentation. After that we have to take the readings of various parts of the tree and analyze the data to find out the problem. In the next step, we have to made the results on the basis of the data that is obtained. In the last we have to write the conclusion of the analysis and see the hypothesis.
Which is true of synthesis and decomposition reactions
Complete question is;
What is true of synthesis and decomposition reactions?
A) Synthesis reactions require more energy than decomposition reactions.
B) Synthesis reactions produce more products than decomposition reactions.
C) Synthesis reactions are the opposite of decomposition reactions.
D) Synthesis reactions have fewer reactants than decomposition reactions.
Answer:
C) Synthesis reactions are the opposite of decomposition reactions.
Explanation:
Correct answer is option C. This is because, Synthesis reactions are defined as those whereby substances are combined together to form larger molecules/compounds. Whereas, decomposition reactions are the opposite due to the fact that they involve the breakdown of two or more substances.
The electronegative of phosphorus is
A(n)_______ contains two or more substances that are not chemically combined. (pic down below)
Brain storm 7-10 ways that the water molecules have been either put to good use or violated on planet Earth
Answer:
Find the list below.
Explanation:
Good Use
1. Manufacture of substances: Virtually all manufactured substances incorporate water during their production.
2. Provision of electricity: Water in dams have been channeled to provide thermal energy.
3. Provision of transportation: Ships, boats, and canoes provide a means of transporting humans and goods to other places using water as a medium.
4. Provision of recreation: Swimming in pools are recreational activities.
5. Cleaning surfaces and the environment: Dust and other debris are removed from our homes and environments with the help of water.
6. Provision of food: The fishes obtained from water bodies serve as a food source.
Bad Use
1. Refuse dumping ground: Most industries and homes channel waste products into water bodies and this can be dangerous to aquatic lives.
2. Channels for oil spillage: Oil spillage is another environmental hazard caused by humans on water bodies.
Your classmate is viewing a sample using high power and is about to refocus using the coarse adjustment knob. What would you recommend your classmate do and why?
Answer:
Using the coarse adjustment knob of the microscope in high power may lead to the breaking of the slide if adjusted and raised the slide too much which can damage the sample as well as the high power lens.
In this case, I would recommend using the fine adjustment knob and moving away from the end of the viewing area of the microscope so there would no collision take place. The fine adjustment will help to get a clear image.
If you travel at 10m/s how much time would it take to travel a distance of 542 meters?
Answer:
The answer is 54.2 seconds
Explanation:
If you divide 542 by 10 you get 54.2 which is then labeled as seconds.
Please help due today!
Answer:
It's the first answer choice for sulfur and the second answer choice for magnesium I believe
What type of rock is formed when mineral-rich water seeps through the
sediments and glues, or cements together?*
A) Metamorphic rock
О
B) Igneous rock
C) Sedimentary rock
D) Volcanic rock
...clutching am I.Sedimentary
Ecosystems are constantly _______________ (changing, remain the same) in the ________________ (same, different) ways over time.
Answer:
changing
different
Explanation:
During which state of matter does temperature increase the most?
Answer:
Gases
Explanation:
Gases have the highest kinetic energy of any state of matter and thus occur at the highest temperatures. Increasing the temperature of a gas in an open system will not further change the state of matter because the gas molecules will only become infinitely further apart.
Answer:
Gas
Explanation:
There are many forms in which temperature increases, for example sublimation, (solid to gas) which is essentially vaporization which happens during a sub-like gas phase concluding the answer to gas.
What kind of machine allows a single sailor to turn an entire ship with the ship's wheel, and how does it work?
Answer:
The ship's wheel is an example of a wheel and axle. It creates a mechanical advantage for the sailor because she can apply a small force over a large distance by turning the big ship's wheel.
(please mark brainliest if it's correct <33)
How can global warming and climate change be addressed to prevent these extreme conditions.
Plzzzzzzzz helppppppop
Answer:
you can ride a bus, ride a bike, or walk to prevent greenhouse gasses from entering the atmosphere causing global warming and climate change
Explanation:
Answer:
One way that can be very helpful is finding a way to capture carbon and bad fumes from the atmosphere which Elon Musk is offering 100 million dollars to whoever can find a way to do it !
Explanation:
Two balloons are given an electrostatic charge by rubbing them with a wool cloth. Which observation provides evidence of the force that the balloons exert on each other over a distance because of their charge?
Answer:
C. Moving Balloon 1 can make Balloon 2 move without the balloons touching.
Explanation:
When two balloons are rubbed with a wool cloth, they get electrostatic charge and both become negatively charged.
If both balloons will be place close together, balloon 1 will push the balloon 2 far from itself without touching it as they both are negatively charged and things with same charges repel each other.
Hence, the correct answer is "C. Moving Balloon 1 can make Balloon 2 move without the balloons touching."
A ring of pure gold has a mass of 17.3 grams. How many atoms of gold are in the ring?
Answer:
5.29936 x 10^23 atoms
Explanation:
To do this, we need to find the number of moles in the ring so that we can then multiply that by Avogadro's number (6.022×10^23).
equation for finding moles: [tex]n = \frac{mass}{M_{r} }[/tex]
substitute in the known values: [tex]n = \frac{17.3}{197 }[/tex]
divide to find the value of n: 0.088 mol
Multiply by Avogadro's constant: 0.088 x 6.022 x 10^23
= 5.29936 x 10^23 atoms in the ring.
hope this helps!
According to Avogadro's number, there are 5.289×10²² atoms of gold in 17.3 grams of ring.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number
In the given problem, number of atoms of gold is found out as, number of atoms=17.3/196.966×6.022×10²³=5.289×10²² atoms.
Thus, there are 5.289×10²² atoms of gold in the ring.
Learn more about Avogadro's number,here:
https://brainly.com/question/11907018
#SPJ5
volume of 5.2 X 10^26 molecules of CH4
Answer:
19348.84 L
Explanation:
At STP, we know that;
6.02 × 10^(23) molecules = 22.4 L
Therefore, 5.2 × 10^(26) molecules = 5.2 × 10^(26) × 22.4/(6.02 × 10^(23)) = 19348.84 L
Thus, volume of CH4 with 5.2 X 10^26 molecules is 19348.84 L
In naming the compound PCl5, the prefix used with the second element is ____________________.
Answer:
[tex]\boxed {\boxed {\sf Hepta}}[/tex]
Explanation:
We are given the formula:
[tex]PCl_5[/tex]
This is a molecular formula, because it contains nonmetals.
1. Name the first element
The first element is phosphorous (P). Since this is the first element and there is only one, we don't need a prefix.
Phosphorous2. Second element
The second element is chlorine (Cl). It has a subscript of 5, so we must add the prefix of hepta-.
Phosphorous heptachlorineAdd the ending of -ide.
Phosphorous heptachlorideThe prefix used for the second element is hepta. The compound name is phosphorous heptachloride.
1. Write the chemical formula for slacked lime
2. Give the molecular and structural formulae of ethane
Solve both plz and helpppp me
Answer:
cl+ms=ClMs
Explanation:
just add them together it aint right btw
What type of elements are in s-block
When you name a binary compound, you have to add____ to the ending of the second element in the compound.
A) -ate
B) -ide
Answer:
B - ide
Explanation:
The most penetrating form of radiation is __ radiation.
a. alpha
b. beta
c. positron
d. gamma
Answer: gamma. it is extremely deadly to living tissue
Explanation:
How is a chemical equation different from a chemical formula?
Answer:
Explanation:
A chemical formula is the combination of atomic symbols that designate a particular chemical compound, or a substance with two or more different elements. The formula shows which type and how many of each element makes up that specific compound
What can air pollutants do?
Answer:
Air pollution can also cause headaches, dizziness, and nausea. ... Long-term health effects from air pollution include heart disease, lung cancer, and respiratory diseases such as emphysema. Air pollution can also cause long-term damage to people's nerves, brain, kidneys, liver, and other organs.
Explanation:
Explain what the periodic table is and how it's organized
Answer:
The periodic table is a set of elements organized by their atomic number, from lowest (hydrogen 1) to highest (oganesson 118). That number is the amount of protons in the nucleus of an atom of the element. The table is split into three groups of elements (metals, nonmetals and metalloids). As you go down the table the elements are more reactive.
Explanation:
^^
lithium sulphate is used in some medicines and its presence in a medicine can be shown by two a combination of two tests a)explain how a flame test could help in this context
b) Describe how you would test a solution of the medicine for the presence of sulphate ions.
C) write a balanced chemical equation, including state symbols, for the reaction occurring in B)
Answer:
A flame test could help by seeing what things it could catch on fire from or the things that could happen with acids etc. I would test the medicine by asking someone who has had it in their life, asking doctors or I would maybe use it myself maybe. (I don’t know about c, sooo sorry)
Look at the graph
below.
Write a paragraph
describing a scenario
that this graph would
be true for.
Hurry & I’ll mark you brainliest GIVING POINTS TO ANYONE WHO HURRIES
Answer:
a item dropping
Explanation:
KE is movement and PE is height. As it's falling it gets KE and falls downward giving it more KE and less PE
Answer:
Explanation:
Trana make us pay for da answer smh
Can someone please help me with this, ill give you a heart, a 5 star rating, and the brainliest answer!
how many grams of Al2O3 are needed to produce 24.5 L of O2 gas at STP?
Answer:
74.35 g
Explanation:
The equation of the reaction is given as;
2Al2O3 --> 4Al + 3O2
From the reaction;
2 mol of Al2O3 reacts to produce 3 mol of O2
Converting 2 mol of Al2O3 to mass;
Number of moles = Mass / Molar mass
Mass = Number of moles * Molar mass
Mass = 2 * 101.96 = 203.92 g
Converting 3 mol of O2 to volume;
1 mol = 22.4 L
3 mol = x
x = 22.4 * 3 = 67.2 L
This means 203.92g of Al2O3 produces 67.2L of O2
xg would produce 24.5 L of O2
203.92 = 67.2
x = 24.5
x = (24.5 * 203.92) / 67.2
x = 74.35 g
A student need to predict the mass of a block of aluminum. The block is 4.23 cm on all sides and the density of aluminum is 2.7 g/cm3. What will the mass of the block be?
A compound that releases hydroxide ions in solution would most likely have which chemical property? 1.It would react with lipids to form soap. 2.It would react with metals to form a salt and water. 3.It would react with metals to form hydrogen gas. 4.It would react with carbonates to form carbon dioxide.
Answer:
1
Explanation: bases do not react with metals or carbonates
Answer:
A
Explanation:
I did the test and that's the correct answer
Do you think thermal expansion affects all states of matter or just the solid? Explain your thinking.
Answer:
All three states of matter (solid, liquid and gas) expand when heated. The atoms themselves do not expand, but the volume they take up does.
When a solid is heated, its atoms vibrate faster about their fixed points. The relative increase in the size of solids when heated is therefore small. Metal railway tracks have small gaps so that when the sun heats them, the tracks expand into these gaps and don’t buckle.
Liquids expand for the same reason, but because the bonds between separate molecules are usually less tight they expand more than solids. This is the principle behind liquid-in-glass thermometers. An increase in temperature results in the expansion of the liquid which means it rises up the glass.
Molecules within gases are further apart and weakly attracted to each other. Heat causes the molecules to move faster, (heat energy is converted to kinetic energy) which means that the volume of a gas increases more than the volume of a solid or liquid.
However, gases that are contained in a fixed volume cannot expand - and so increases in temperature result in increases in pressure.: