Answer:
2
Explanation:
4. Circle the letters of elements that are required for a measurement to
make sense.
a. scientific notation
b. numbers
с. exponents
d. units
Answer:
(b) numbers and (d) units
Explanation:
To measure any quantity, numbers and units are required. It can be understood with an example.
We measure a length of a piece of wood as 5 cm. In this case 5 is a number and centimeters or cm is a unit in which we measure its length. It means for any measurement, number and units are important elements that are required to make sense.
Hence, the correct options are numbers and units.
does anybody knows the field in science for the levels of organization
Answer:
Taxonomy
Explanation:
Taxonomy is the science of naming, describing and classifying organisms
How many liters are equivalent to 645 mililiters
Answer:
0.645 liters
Explanation:
THE QUESTION IS equivalent 0.645 Liters
B. Which of the following compounds can
NOT demonstrate the law of multiple
proportions ?
a. NO, NO
b. CO, CO2
c. H,O, H,O2
d. Na2S ,NaF
1
11
Answer:
The correct answer is:
d. Na2S, NaF
Answer:
CO2
Explanation:
If brass is 25% copper, how many grams of copper are in 12 grams of brass
If a liquid has a volume of 5800 mL and you need the mass in Liters, will the number appear to
become smaller or larger?
Answer:
The number will appear to become smaller (from 5800 mL to 5.8 L).
Explanation:
The conversion of milliliters to liters is the following:
1 L = 1000 mL
Hence, the volume of 5800 mL to L is:
[tex] V = 5800 mL*\frac{1 L}{1000 mL} = 5.8 L [/tex]
Therefore, the number will appear to become smaller (from 5800 mL to 5.8 L).
I hope it helps you!
Describe how iron and sulfur can be an element, mixture, and a compound.
iron is a metal and sulfur is a non-metal and both are in the periodic table which means they are elements. Together they can form a compound with an ionic bond. and can be mixed to form a mixture.
What could J. J. Thomson conclude from his experiments? Atoms are mostly empty space. Most of the mass of the atom is concentrated in the center. Atoms must balance positive and negative particles. Atoms are indivisible.
Answer:
atoms must balance positive and negative particles
Explanation:
Answer:
C: Atoms must balance positive and negative particles.
Explanation:
can someone help me calculate the average speed??
Answer:
3 meters per second
Explanation:
Average speed = total distance / total time
We know that total distance = 45 meters and total time = 15 seconds, hence, average speed = 45 meters / 15 seconds = 3 meters per second.
Answer:
V=S/t
Explanation:
V=?
S= 45meters
t=15sec
V=S/t
V=45/15
V=3m/sec
The overall process of photosynthesis has the balanced chemical equation 6CO2 + 6H2O --> C6H12O6 + 6O2. What does this tell you about the relative amounts of carbon dioxide and water consumed in this process?
Answer:
Equal parts are needed to make glucose and oxygen. The excess oxygen is released into the air
Explanation:
This equation explains why having plants in your house is good.
what does 2 in the chemical formula CaCl2 mean?
Answer:
The answer is
Explanation:
Calcium chloride is created from the ionic bonds that form between calcium cations and chloride anions. Calcium ions have a charge of +2, while chloride ions have a charge of -1. Calcium chloride salts can also form crystals based on these same ionic properties.
Hope this helps.
Please mark my answer as brainliest?
Fire blankets are used for
Answer:
to put out fires or keep ppl safe from fire
Explanation:
Which of the following describes a reference point?
A. The point at which the direction of motion changes
B. The center point of a grid
C. The position of an object after its motion has stopped
D. The location of an object before its motion begins
Answer:
A.The point at which the direction of motion changes
The point at which the direction of motion changes is described as a reference point.
What is motion?
Motion is defined as a phenomenon which is described with respect to change in object's position with respect to time.It is given in terms of displacement,velocity,distance ,acceleration,speed.
Branch of physics which deals with motion of objects without any reference to it's cause is called kinematics while the branch which studies forces and their effects on motion is called as dynamics.
Motion applies to various systems like objects,bodies, matter particles ,radiation ,curvature.There are three laws of motion which are proposed by Newton.Classical mechanics is based on Newton's law of motion.Relativistic mechanics is based on modern kinematics.
Learn more about motion,here:
https://brainly.com/question/22810476
#SPJ6
A freighter ship carrying a cargo of uranium hexafluoride sank in the English Channel in late August 1984. The cargo of uranium hexafluoride weighed 7.51 x 104 kg and contained 1.47 x 106 L of UF6. What is the density, in g/mL, of uranium hexafluoride?
Answer:
Heyo (Ish Mash Potato) XD
Explanation:
a freighter carrying a cargo of uranium hexafluoride sank in the english channel in 1984. the cargo of uranium hexafluoride weighed 2.25x10 to the eight power. kg and was contained in 30 drums, each having a volume of 1.62x10 to the sixth power L. what is the density in g/ml, of uranium hexafloride.
Hope Mr. Mash Potato Helped!!!
Explanation:
A freighter ship carrying a cargo of uranium hexafluoride sank in the English Channel in late August 1984. The cargo of uranium hexafluoride weighed 7.51 x 104 kg and contained 1.47 x 106 L of UF6. What is the density, in g/mL, of uranium
What point were the authors of the Declaration trying to make in the Preamble?
HELP.
Answer:
To explain why they are revolting against the king
Explanation:
how do you convert L to mL
Answer:1 Liter (L) is equal to 1000 milliliters (mL). To convert liters to mL, multiply the liter value by 1000. For example, to convert 2 liters to mL, multiply 2 by 1000, that makes 2000 mL is 2 L.
Explanation:
Consider the statement below.
“When nitrogen is liquefied, heat is released.”
Is this statement true or false?
Answer:
True
Explanation:
It is true because heat is released when a gas changes to a liquid.
Answer:
True
Explanation:just took the test
Identifying Physical and Chemical Properties
Ques: how to identify physical or chemical properties
Ans: you can identify them by their properties. make sure that it matches its property. but you must know the physical and chemical properties . i will give an example .so how to identify boiling of eggs and changing of water into ice. Physical properties
-it can be reversed back
-it is temporary change
-no new substance is formed
chemical properties
-it cannot be reversed back
-it is permanent change
-new substance is formed
now boiling of eggs matches all property of chemical change so it is chemical change. changing of water to ice matches all property of physical change so it is physical change.
hope it helps
The SI base unit for mass is the gram. TRUE FALSE
Explanation:
Hey there!!
Actually gram is also a measurement unit used in CGS system of measurement.
But in SI system, there is use og kilogram in measuring mass.
{There is use of gram as a base}.
So, the answer is True.
Hope it helps..
How did scientists find out about the the evolution of the atmosphere?
How do each earth’s layer compare to each other?
How many moles are in 19.4 grams of sodium( Na)?
Answer:
0.844 mol Na
Explanation:
19.4 g Na x (1 mol Na/22.99 g Na) = 0.844 g Na
*BRAINLIEST* Is calcium nitrate solution an element, compound, homogenous mixture, or heterogeneous mixture?
Answer:
It's a compound.
Answer:
Homogeneous mixture.
Explanation:
All solutions are homogeneous mixtures; therefore, a calcium nitrate solution would be a homogeneous mixture.
Please help me answer all of this! (Will give brainliest answer and hearts) Please and thank you!
Answer:
Hi there!
Your answers are:
1. Physical
2. Chemical
3. Chemical
4. Chemical
5. Chemical
6. Physical
7. Physical
8. Chemical
Explanation:
Physical, aka mechanical, digestion occurs due to ACTIONS from the body! This can be contracting muscle walls to move it along or the use of teeth to crush food. Chemical digestion is due to some acid or chemical that the body makes! This breaks down food so the body can process it.
I hope this helps!
How dose the Temperature of a bouncy ball affect its bounce height?
Answer:
The colder the bouncy ball is the harder the rubber gets so it will contract ans make the bouncy ball heavier, the hotter the bouncy ball is the lighter it gets because the ball expands making the bouncy ball bigger
Explanation:
what is a hypothesis?
Answer:
A suggested solution for an unexplained occurrence.
Explanation:
A hypothesis is an educated guess, because you don't know what will happen / what is going to happen, you are just making a guess on what you think will happen. It is a solution for an unexplained occurrence.
If the chemical properties of a substance remain unchanged and the appearance or shape of an substance changes it is called a
a.Chemical change
b.Physical change
c.Chemical Property
d.Both a physical and chemical change
e.Neither a physical or chemical change
Answer:
B
Explanation:
physical change is the answer I hope
Answer:
A
Explanation:
it is A because i am really smart
Chlorine-
What is the mass number of this element?
How many neutrons?
Answer:
Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. The chemical symbol for Chlorine is Cl. Neutron Number and Mass Number of Chlorine Mass numbers of typical isotopes of Chlorine are 35; 37.
Explanation:
Why is it better to mix drops of solutions in a reaction plate rather than to mix milliliters of a solution in a flask?
Explanation: Hey Sonia, I see I'm not the only one at school struggling in Chem. My best guess is to minimize the likelyhood and size-amount of a chemical reaction.
Electrons involved in bonding between atoms are____.
Answer:
valence electrons
