Answer:
magnesium in biological system,magnesium is smaller atom because calcium has more electron (20e-) which will occupy more energy levels (n=4) for calcium versus n=3 for magnesium)
Explanation:
maybe Brilliant answer?
two substances react and the mass is recorded.The mass of the products does not equal the mass of the reactants .Which is the best explaination for the different masses?
Mineral A can scratch Mineral B, but Mineral B cannot scratch Mineral A. Mineral C can scratch Mineral A. Which of the following is true?
A.Mineral C is softer than Mineral A.
B.Mineral A is softer than Mineral B.
C.Mineral C is harder than Mineral B.
D.Mineral A is harder than Mineral C.
the answer is B
Explanation:
mineral c is harder than B because A can scratch B and C can scratch A
Answer:
B.Mineral A is softer than Mineral B.
Explanation:
What is the temperature of the Sun's middle most layer the chromosphere ?
It’s temperature is 5,500 degrees celsius to 6,000 degrees celsius.
It’s temperature is 6,000 degrees celsius to 20,000 degrees celsius.
It’s temperature is 20,000 degrees celsius to 2,000,000 degrees celsius.
It’s temperature is 2,000,000 degrees celsius to 3,000,000 degrees celsius.
Answer:
It's temperature is 6,000 degrees celsius to 20,000 degrees celsius.
Explanation:
Answer:
It's temperature is 6,000 degrees Celsius to 20,000 degrees Celsius
Explanation:
If you go from the Earth to the Moon, will your MASS change?
Answer:
No matter if you are on Earth, the moon or just chilling in space, your mass does not change. But your weight depends on the gravity force; you would weigh less on the moon than on Earth, and in space you would weigh almost nothing at all.
Answer:
Your mass doesn't change on other planets, but the gravity and size of those planets affect how much you weigh. So, your weight depends upon the gravity of the planet and your weight keeps changing based on planet gravity. Mass is both a property of a physical body and a measure of its resistance to acceleration when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies.
Explanation:
I am smart...Calibri is the superior font and green is the superior highlighter.
How many Electrons, Neutrons & Protons do
Sodium-12
Sodium-20
Nitrogen-15
Nitrogen-20 have?
Answer:
sodium
protons:11
neutrons:12
electrons:11
nitrogen
protons:7
neutrons:7
electrons:7
I’ll give more points cuz like why not?
Answer:Are these free points
Explanation: because if so I want them
when a person strikes a match, potential energy in the match is transformed into which types of energy?
Answer:
the answer is thermal and radiant
If an element’s atomic number is 15, how many electrons must it have in order to be neutral?
Answer:
15
Explanation:
atomic number is the same as protons so 15 protons and 15 electrons would be neutral
Which explains one reason evaporation can be used to separate a mixture?
The desired component has a higher boiling point than the other components.
The desired component has a different density from the other components.
The mixture is a solution that contains a substance that will crystallize out.
The desired component has the smallest particles in the mixture.
Answer:
its the first one
Explanation:
if only one mixture boils the other will stay as the boiling one will evaporate
Answer:
The answer would be
A. The desired component has a higher boiling point than the other components.
Explanation:
Credits to the person above
Have a great day
Does Arsenic have a high or low ionization energy in comparison to Carbon? Explain why using the concepts of the structure of the atom
Calculate the mass, in kilograms, of an object that occupies 0.253 dm3 and has a density of 4.14 g/cm3.
Answer:
m = 1.047 kg
Explanation:
Volume occupied by the object, V = 0.253 dm³
1 dm³ = 1000 cm³
0.253 dm³ = 253 cm³
Density of the object, d = 4.14 g/cm³
We need to find the mass of the object. Mass per unit volume is called density of an object.
[tex]d=\dfrac{m}{V}\\\\m=d\times V\\\\m=4.14 \ g/cm^3\times 253\ cm^3\\\\m=1047.42\ g[/tex]
or
m = 1.047 kg
So, the mass of the object is 1.047 kg.
What is the density of an object if the mass is 240 g and the volume is 12 mL?
Answer:
20
Explanation:
Because 240÷12=20 m÷v=d
The object's density is given with the help of the mass of the object and with the volume. The density of the object weighing 240 gm with a volume of 12 mL is 20 g/mL.
What is density?The density of an object is the volume of the solution displaced by the mass of the object. It is given by the ratio of the mass to the volume of the object and the solution displaced.
Density is an important measurement formula that is used in fluid dynamics to determine buoyancy.
The density of the object is given as,
Density (D) = Mass ÷ Volume
Given,
Mass = 240 gm
Volume = 12mL
Substituting values in the above formula the density will be calculated as:
Density (D) = 240 gm ÷ 12 mL
D = 20 gm/mL
Therefore, the density of the 240 gm object will be 20 gm/mL.
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define relative velocity with an example
Answer:
For example, you are in a bus and it goes with the velocity of 50 m/s to the east, then a truck passes you with a velocity of 60m/s to the east. ... Velocity of the moving objects with respect to other moving or stationary object is called “relative velocity” and this motion is called “relative motion”
ctto.
3. How many meters long is a 360 inches long extension cord?
Answer:
9.144 meters.
Explanation: Formula: divide the length value by 39.37 , which yields 9.144.
are milliseconds or kilo seconds larger?
Answer:
kilo seconds
Explanation:
kilo prefix means it is large and . milli as small
FIRST ANSWER GETS CROWNED BRAINLIEST!!!!!!
A truckload of plastic soda bottles was finely shredded at a recycling center. The plastic shreds were placed into 55-liter drums. What it the mass of the plastic shreds inside one of the drums in kg? Assume lowest density within the range.
Answer:
75,900 g
Explanation:
m=d×v
(1.38g/cm^3) × (55,000)
During the SI Scavenger Hunt Lab, a student measured her foot length using a meter stick and recorded it as 25 cm. However, at the shoe store, the sales staff measured the length of her foot to be 23.7 cm. If the shoe store’s measurement is accepted as correct, what is the percent error of her meter stick measurement?
Answer:
Percent error in meter stick measurement is 5.5%.
Explanation:
Given data:
Measured value = 25 cm
Accepted value = 23.7 cm
percent error = ?
Solution:
Subtract the accepted value from measured value divided by accepted value multiply by 100.
Formula:
(measured value - accepted value / accepted value ) × 100
Now we will put the values.
(25 cm - 23.7 cm/23.7 cm ) × 100
1.3 cm/23.7 cm ) × 100
0.055× 100
5.5%
Percent error in meter stick measurement is 5.5%.
Find the number of moles of 452 g of Iodine.
Answer:
3.5617342714563267
Explanation:
WHAT IS A ELECTROLYTE?THIS IS FOR MY PRESENTATION
Answer:
Explanation:
substance (as an acid or salt) that when dissolved (as in water) conducts an electric current.
Answer:
An electrolyte is a compound which produces ions when dissolved in a solution such as water. These ions have either a positive or negative electrical charge, which is why we refer to these compounds as electro-lytes
how many moles of water are in 0.340 g of water?
Answer: 0.018 recurring?
Explanation:
moles = mass/mr
H20 = 2 + 16 = 18
0.340/18 = 0.018
Does a chemical reaction in a closed or open best supports the law of conservation of matter
Answer:
Normally, it explains that matter cannot be created or destroyed. It demonstrates different chemical reactions that help show the different transformations of the matter but will never destroy it or create it.
How many nitrogen atoms are in the chemical formula below? C8H10(N4O2)2
Answer:
8 Nitrogen atoms
Explanation:
Step 1: Define
Chemical Formula - C₈H₁₀(N₄O₂)₂
Step 2: Multiply
(N₄)₂ = N₈
Which of the following best describes the interaction of matter in a suspension?
A.. Particles are spread out, taking on the appearance of a homogenous mixture.
B.. Particles are too big to dissolve in the solution.
C..The particles of a solid dissolve in a liquid.
D.. Particles are chemically combined to form a new substance.
which of the following models of the atom was supported by the gold experiment?
A cube is 4 cm on each side. What is its volume?
Answer: 64cm^3
Answer:
yeah
Explanation:
1. Antarctica is a frozen land, so cold and icy that no trees can grow there. Yet scientists have discovered fossils(remains preserved in rock) of ancient trees in Antarctica
What do you think this means
Answer:
This means that Antarctica once had a warmer climate.
Explanation:
Trees usually grow in warm climates, and Antarctica has little to no plant life.
Nijar did an experiment to test a hypothesis that baking soda is just as effective a cleaner as bleach. He found this not to be true because more bacteria grew on surfaces cleaned with baking soda. Was there any benefit to Nijar's failed experiment?
A. Yes, all the lab equipment can be used again.
B. No, Najar did not discover which product is the better cleaner.
C. No, Nijar wasted his time testing this hypothesis.
D. Yes, Nijar's findings contributed to scientific knowledge.
Answer:
b no
Explanation:
Explain how the type of an atom is defined?
How the type of an atom is defined is
An Atom is defined by how many Protons and Neutrons in its nucleus and electrons in its energy levels
From the question we are told that
How the type of an atom is defined
Generally
It is important to note that atoms are defined strictly by its Embodiment which are its electron protons and Neutrons
An Atom is defined by how many Protons and Neutrons in its nucleus and electrons in its energy levels
Therefore
An Atom is defined by how many Protons and Neutrons in its nucleus and electrons in its energy levels
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What action-reaction forces are involved when a rocket engine fires?
The reaction force is the hot gas pushing back on the rocket propelling it into outer space. There is no need for air to push on because the hot gases produced by the rocket allow the action and reaction forces to operate.
(hope this helps ^^)
After hearing the siren, the student runs into her house and tells her mother there must have been an accident down the street.
She just made a(n).
A inference
B hypothesis
C observation
D prediction
Answer:
A
Explanation:
she inferred that was the end result.
