Which of these is a compound?
carbon dioxide
potassium
salt water
salad
Summary about helium
Answer: Helium is an type of air that can be used to inflate balloons, balls, and other things that require air. The carbon dioxide we breath out is similar to this helium.
Hope this helps!
A man weight 235.0 Ib Express his weight in kg.
How do you find it?
Answer:
The answer is 106.59 and 1 lb = 0.45359237 kg.
Explanation:
How does sediment form?
Molten rock cools below Earth’s surface.
Chemical changes cause sediment to cement together.
Loose material is compacted by pressure.
Weathering breaks down rock and other material.
i will give brainlest also if this get answer becuase i said this no one should have to say that but i will
Answer:
Loose Material is compacted by pressure.
3. magnesium oxide + ?______________________ magnesium nitrate + water
word equation:
________________________________________________________________
full equation:
________________________________________________________________
Ionic equation:
________________________________________________________________
Answer:MgO reacts with nitric acid
Calculate the mass percent of sulfuric acid in a solid sample given a 0.8390g sample of that solid required 32.22 mL of 0.2012 M NaOH for neutralization.
A) 62.11
B) 2.64
C) 37.89
D) 75.78
E) 1.27
Please give an answer and an explanation, thanks!
Answer
C
Explanation:
i remember learning this
Mass percentage does not have any unit as numerator and denominator contains the same unit. The percentage of sulfuric acid in solid sample is 38.07%.
What is percentage by mass?Mass percentage represents the the percentage of each element that is making a particular compound.
Mathematically,
Percentage of mass = (component’s mass ÷ total mass) x 100%
[tex]\rm 2 NaOH aq + H _{2} SO _{4} aq → Na _{2}SO _{4}aq + 2 H _{2} O[/tex]
Volume of NaOH solution = 32.22 mL = 0.03222 L
Concentration or molarity of the NaOH solution = 0.2012 M
Moles of NaOH : 0.03222×0.2012=0.006444mol
2 moles of sodium hydroxide reacts with 1 mole of sulfuric acid.
0.006444mol of sodium hydroxide reacts with =0.006444÷2=0.003222mol of sulfuric acid.
Mass of sulfuric acid neutralized = 0.003222 moles × 98.08 g/mol =0.31601376g
Percentage of sulfuric acid in solid sample= (0.31601376g÷0.8390g)×100=38.07%
Thus the percentage of sulfuric acid in solid sample is 38.07%.
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which is a limitation of a scientific model?
Answer:
A limitation of models in science is that they are usually simplified versions of the real situation or concept.sometimes, models spark debates leading to new and improved models.A model may be used when it is impossible to create the conditions necessary to test a concept of theory.
hope it is helpful...
Wear lightweight clothes in the_____. not sun or summer and is it heat
Answer:
there was too much heat
Explanation:
write down the similarities and differences of Continental and temperature climatic zones
Answer:
Temperate climates, otherwise known as meso-thermal climates, are cooler than subtropical climates, but warmer than polar climates. A continental moderate climate is another sub-type of temperate climates. These regions have hot, rainy summers and cold, dry winters.
Explanation:
HELP ME THIS IS DUE TODAY PLEAS HELP SO I DONT FAIL
WILL GIVE YOU BRAINLIEST!!!
which option is an example of a chemical property?
A ability to decompose
B color
C melting point
D density
which option is an example of a chemical property
A boiling point
B reactivity
C color
D density
Answer:
A ability to decompose
B reactivity
Explanation:
Chemical properties are those properties that tell us about what a substance can do as regards to whether or not the substance reacts with other substances.
Examples are flammability, rusting of iron, precipitation, decomposition of water by an electric current.
The ability to decompose and reactivity are chemical properties of a substance.
Physical properties tells us everything about what a substance is when no change is occurring to its constituents. Examples are state of matter, color, odor, taste, texture, hardness e.t.cAnswer:
1. A
2. B
Explanation:
Chemical property does change the composition of a substance.
I took the test before. I got all the answer correct and got 100% score.
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Learning Properties of Matter Quiz Unit 2 Lesson 11 Grade 8
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a single cell undergoes mitosis every five minutes how many cells will result from this cell in 20 minutes
Answer:
= 16 cells
Explanation:
Mitosis is the stage of cell division in nonsexual cells of eukaryotic organisms (that is, cells that have a nucleus). It takes place in several phases, begins after DNA duplication and ends with the separation of the two daughter cells.
It is a fundamental mechanism that occurs for the first time in the hours following fertilization.
After duplication of the genetic material, during interphase, it condenses and groups to form chromosomes with two genetically identical chromatids: this is the prophase. The nuclear membrane then dislocates, and the centromeres of the chromosomes (the area where the two chromatids of the same chromosome overlap) bind to the microtubules via the kinetochores. Gradually, all the chromosomes are sequestered at the equator of the cell: this is the metaphase.
Then, during anaphase, the chromosomes will split into two chromatids, each of which is pulled towards a pole of the cell. Thus, at each top of the cell, there is a copy of each chromosome. During telophase, the nuclear envelope will begin to reform around the set of chromosomes as the DNA gradually decondensed. The plasma membrane invaginates equatorially under the action of a ring of myosin and actin. Increasingly narrow, the bridge between the cells eventually breaks, and two cells are formed as a result of cytodieresis. Each of them can resume their growth.
Now; having understood what Mitosis is all about.
When a single cell undergoes mitosis every 5 minutes; we have the formation of two daughter cells.
Then in 20 minutes; we will have:
= [tex]2^{20/5}[/tex]
= [tex]2^4[/tex]
= 16 cells
What will an object do if its density is less than the density of water?
Sink
Float
Bob up and down
Move forward
Answer:
bob up and down
Explanation:
i think it is the answer i am not sure
_____ means to make the body well again
Answers;
A. Body Repair
B. Energy
C. Growth
D. Motion. (Which One is it??)
Answer:
I'm pretty sure it's body repair But it also maybe energy
Explanation:
Answer: A.
Explanation:
the science or study of how man and animals perform tasks and solve certain types of problems involving use of the body.
Hope this helps!....(bruh this was tuff)
Similarities and Differences in the order in which electrons are filled in s and d subshells.
Answer: Each orbital is found on different areas of the periodic table. The s sublevels are found on the first(left) and last(right) columns of the period table which hold a maximum of two electrons since it only has one orbital. First, each orbital can hold a maximum of two electrons. The other three sublevels: p, d, and f respectively have more orbitals, which is why they can hold more electrons. These sublevels of orbitals stand for sharp(s), principle(p), diffuse(d), and fundamental(f) (these are simply the categories of orbitals).
p has 3 orbitals so it can hold 6 electrons max. d has 5 orbitals so it can hold 10 electrons max. f has 7 orbitals so It can hold 14 electrons max.
Here is a picture of these orbital groups so you can understand a little better:
If you go to the moon your mass would ___.
stay the same
increase
Answer:
stay the same
Explanation:
you would weigh less if u stood on a scale but you're still the same mass unless you chopped of a body part or something
What is the most important scientific process
Answer:
atoms bonding
Explanation:
A chemical equation is balanced if there are ______ ______ of each kind of ______________________ on both sides of the equation.
If each side of the equation has the same number of atoms of a given element, that element is balanced. If all elements are balanced, the equation is balanced. So your sentence should look like this:
A chemical equation is balanced if there are equal atoms of each kind of element on both sides of the equation.
What is the relationship between the atomic mass of an element and a mole of the element atoms?
The mass of a pure substance represents a specific number of pure substance 'molecules', as defined by molecular weight. The relative atomic mass (atomic weight) in grams/mole (g/mol) is the molar mass of a substance, which means it is the mass of one mole of that substance.
animals need to consume other organisms for energy. how would you categorize them based on that information?
Answer:
They would be carnivores.
Explanation:
A student mixed several different 12 mm plastic beads together by mistake. Luckily the beads had different densities. One group of beads had a density of 0.6 g/cm3; the other beads had a density of 1.2 g/ cm3. Describe a method the student can use to sort the beads.
Answer:
The answer is "Each student will get a glass of water and drop the bead into it but the beads float 0.6 g / cm3 and slip down to 1.2 g / cm3
".
Explanation:
One's masses would've been dissimilar, even though their width and concentrations were also equal. Whenever the type-A mass is m, then the type-B mass is 2 m. One should measure then, therefore.
Water has a 1g / cm^3 density. Although Type A is higher than air, Type B is much more compact. it means will float if they place it in water type-A where type-B sinks.
Which element has 5 protons 5 neutrons and 5 electrons
Elements are the smallest unit of the atom and cannot be divided. An element having 5 electrons, protons, and neutrons is a boron.
What are subatomic particles?Subatomic particles are the constituents of atoms that have mass and charge. They are the components that make the element unique and give the atomic number and the mass.
The electron is a negatively charged particle and protons are positive particles that along with neutral neutron give the atomic mass. An element with 5 sub atomic particles is called a boron.
Therefore, the element is boron.
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Scientists in a lab are working with two different samples of the element mercury. They know that the different samples are different isotopes.
Which property of the isotopes must be different?
a. the atomic number
b. the electric charge
c. the element name
d. the mass number
Answer:
A Mass number
Explanation:
did it on edge2020
If a 20-N net force makes an object accelerate at 10 m/s^2, what is the mass of the object?
Answer:
The answer is 2 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
where
a is the acceleration
f is the force
From the question we have
[tex]m = \frac{20}{10} \\ [/tex]
We have the final answer as
2 kgHope this helps you
state four difference between the series and parallel connection?
Answer:
1- The components in a series circuit are arranged in a single path from one end of supply to another end. However, the multiple components in a parallel circuit are arranged in multiple paths where the two end terminals of the battery.
2- In the series circuit, different voltage exists across each component in the circuit. Whereas in the parallel circuit, the same voltage exists across the multiple components in the circuit.
3- The equivalent resistance in case of a series circuit is always more than the highest value of resistance in the series connection. While the equivalent resistance in the parallel circuit is always less than any of the individual resistances in parallel combination.
4- A fault in one of the components of the series circuit causes hindrance in the operation of a complete circuit. As against fault in a single component in a parallel network do not hinder the functioning of another part of the circuit.
The detection of a fault in case of a series circuit is difficult, but it is quite easy in parallel circuits.
How is a scientific theory different from everyday theories proposed by random individuals?
A.
Everyday theories can be proven beyond doubt.
B.
Everyday theories are based on facts, not opinions.
C.
Scientific theories must be supported by evidence or data.
D.
Scientific theories are not different from everyday theories.
Spongebob completed his experiment. He wrote a brief summary about the investigation. He also determined that his hypothesis statement was not right and explained why it wasn't right by providing evidence from the investigation. Spongebob utilized which step of the scientific method?
Answer:
In a 7-step scientific method, Spongebob utilized the 6th step when He wrote a brief summary of the investigation, and Spongebob utilized the 7th step when He also determined that his hypothesis statement was not right and explained why it wasn't right by providing evidence from the investigation.
Explanation:
Scientific Methods are organized ways employed by scientists to tackle problems by providing solutions to the problem or make hypotheses to which other scientists build on to provide solutions to the problem.
The steps of the scientific method are:
Step 1- Understand the Problem
Step 2- Make research
Step 3- Hypothesis.
Step 4- Conduct an experiment to test the hypothesis
Step 5- Observations.
Step 6-Results/Conclusion.
Step 7- Communicate your research
When Spongebob wrote a brief summary of the investigation, which means he had already conducted an experiment and had already made necessary observations and data collection, so he was at step 6. At step 6, he had analyzed the data collected.
When Spongebob determined that his hypothesis statement was not right and explained why it wasn't right by providing evidence from the investigation, then he was at the final step of the scientific method. Step 7 tells whether the hypothesis is true or false.
Answer:
hey im spongebob
Explanation:
:D
What is the term for a ratio of equivalent measurements that can be used to change a value from one unit to another
Answer:conversion factor
Explanation:
What are some ways you can avoid the health risks of too much radiation
exposure?
Answer: when you go outside protect your skin with sunscreen, protective clothing, a hat, and sunglasses
Explanation:
How many elements are in this chemical formula?
HCl
Group of answer choices