Answer:
0.375 g/mL
Explanation:
Given data:
Volume occupy by wood = 200 mL
Mass of wood = 75 g
Density of wood = ?
Solution:
Formula:
d = m/v
by putting values,
d = 75 g/ 200 mL
d = 0.375 g/mL
Suppose the moon rotating on its axis just as quickly as earth would we still always see the same side of the earth explain
Answer:If the Moon rotated as fast as the Earth would we only see one side of the Moon? ... The Moon, on the other hand, rotates once around its own axis every 28 days, and once around the Earth in that same 28 days. The end result of this combination is that the same side of the Moon is always facing the Earth
Explanation:
The moon rotates on its axis along with revolution around earth. Both time are synchronized due to the gravitational pull and tides of earth. That's why we are seeing the same side of moon.
What is gravitational pull?Gravitational force is a force by which a body attracts other body towards its centre of mass. By the gravitational pulling of earth, we are all standing on the ground.
Gravitational force depends on the mass of the body. Earth attracts its nearby objects by gravitational force and thus towards moon also. In fact if moon is quickly rotating on its own axis we would see the other side of moon.
But the fact is that the earth gravitational pulling and tides of ocean make its own gravitation also make the moon tilted slightly and assume a prolate shape. The rotation of moon is thus tidally locked and synchronized with its revolution.
Hence, moon rotates exactly once every time as it revolve around earth in a tilted axis. Thus the other side will always hide from the earth's surface.
To find more about gravitational force, refer the link below;
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How are solutions classified? Give an example of each.
Express in scientific notation. Choose the answer with the proper number of significant figures. 9x10^9/4.5x10^1
Answer:
Your answer should be 2.4 x 10^9. please hit the crown
Explanation:
Can someone help? Ill give brainliest!
Directions: count each side of the reaction then Circle yes or no if it follows the law of conservation of mass
Answer:
It does follow the law of conservation of mass.
Explanation:
You start with 4 phosphorous atoms and 6 oxygen atoms, you end with 4 phosphorous atoms and 6 oxygen atoms.
Which of these ions has the correct charge?
O2-
B2+
P2-
Li2+
Answer:
02- i think your welcome hope it helps
The B-group elements of the periodic table do not include: 1) metals. 2) Non-metals. 3) D. Elements
what is the physical state of the fuel in a lighter?why happens if you press the lighter in order to let the fuel to flow out
Answer:
It is a liquid gas
Explanation:
The spark of the lighter starts the fire which is exposed to the liquid gas in the lighter
Lily replicates an experiment that found that the number of calories in a particular food is 50 kcal. She obtained data from five trials: 50 kcal, 72 kcal, 50 kcal, 12 kcal, and 50 kcal.
Which best describes her data results?
accurate
incorrect
invalid
precise
PLEASE HURRY IM TIMED
Answer:
the best that describes her data result is precise
PLEASE HELP!!!!!
Step 3: Explain your prediction.
a) Create a new blank document. Type your name at the top.
b) Write a few paragraphs predicting the products of the chemical reaction and explaining why you
made this prediction. Your document should:
i. identify the products of the chemical reaction.
ii. explain why these are the products based on trends in the periodic table (the number of
valence electrons, electronegativity, etc.).
iii. identify the types of bonds in the reactants and products.
iv. identify the number of each type of bond in the reactants and products.
v. identify the type of reaction.
c) Label these paragraphs “Initial Explanation.”
how do i do the chemicals
you have to put them togeter
Given the following equation,
HCl aq) + NaOH aq
NaClaq) + H2O(l)
How many moles of H20 will be produced if there are 5 moles of HCI?
Answer:
5 moles
Explanation:
Given data:
Number of moles of HCl = 5 mol
Number of moles of H₂O produced = ?
Solution:
Chemical equation:
HCl + NaOH → NaCl + H₂O
Now we will compare the moles of HCl with H₂O.
HCl : H₂O
1 : 1
5 : 5
5 moles of water will be produced.
How many ELEMENTS are in Mg + 2HCl → H2 + MgCl2
Answer:
the answer is three I belive
Can anyone help me out?
Answer: You could use the process of distillation, which involves boiling the substance.
Explanation: The component that boils at the lowest temperature will become a vapor and separate.
Q 1. Element M is a metal that forms compounds of the type MX2, MX3, and MX4, where X is a Chlorine (Cl).
I) What is the expected trend in the ionic radius of M in these compounds?
II) Arrange these compounds in order of decreasing ionic radius of M.
Do not respond if u don’t know the answer. I’ll report it and u will get a warning.
Answer:
See explanation
Explanation:
The ionic radius of metal M decreases as the magnitude of charge on the metal M increases. The ionic radius is the distance between the nucleus and the electron in the outermost shell of an ion. So, ionic radius decreases with increasing positive charge.
We can see that from the various formulae in the question that the metal forms cations M^2+, M^3+ and M^4+ respectively. The order of decreasing ionic radius of the compounds is;
MX2 > MX3 > MX4
Answer:
dont know
Explanation:
The amplitude of a transversal wave in a spring toy triples. What happens to the energy of the wave in the
toy?
Answer: The energy of the wave increases by a factor of 9
Explanation:
3 x 3 = 9
Which of the following has the greatest mass? Star, Moon, Planet or Galaxy?
YOU GET MANY POINTS)
Answer:
galaxy
Explanation:
because it contains the whole universe
Why is NCl3 not soluble in water?
Answer:
Explanation:
NCl3 does not dissolve in water because it is a nonpolar molecule which is different with water. NCl3 is nonpolar due to the difference in electronegativities between 3 atoms of Cl and 1 atom if N2.
Answer:
A polar solute dissolves into a polar solvent and a non-polar compound dissolves into a non-polar solvent, this rule is known as "like dissolves like".
1. How many atoms of oxygen are represented in 3Ba(ClO3)2? (3 points)
3
6
9
18
Answer:
6
Explanation:
How many moles are there in 12.5 g of methanol, CH3OH?
A) 0.0326 mol
B) 0.39 mol
C) 69.0 mol
D) 30.7 mol
Answer:
B (0.39 mol).
Explanation:
Hope this helped!
Which two statements describe disadvantages of selective breeding? A. Desirable traits that are not selected may disappear in a population B. Selectively bred animals are more likely to have some health problems C. Some desirable traits become more common in a population. D. Selectively bred animals are more likely to provide more meat or milk.
Answer:
B and C
Explanation:
Selective breeding is a procedure that involves the purposeful breeding of selected parents in order to give rise to offsprings with desired traits. Selective breeding procedure has its own advantages, which includes the ability to produce more animal products such as milk, meat etc, however, it has disadvantages.
The disadvantages include that:
- Selectively bred animals are more likely to have some health problem
- Some desirable traits become more common in a population.
A and B
Trust me
I took the quiz and got a 100
What can you say about an atom with a -2 ion of oxygen-17? WILL GIVE BRAINLIEST
Answer:
The mass number of an isotope is indicated in the name of the isotope by writing the name of the element followed by a hyphen and the mass number.
Explanation:
Examples include carbon-14, uranium-235, and oxygen-17.
increased amounta of carbon dioxide in Earth's atmosphere may lead to global warming. what might global warming then lead to
air temperatures increasing.
Someone help me please i’ll give brainly
Answer:
Gas, liquid, and plasma
Explanation:
Answer:
Liquid, Gas and Plasma
Explanation:
➨Think about it like this if you put a material made out of these and flipped it over which one would have the most effect of change in shape?
▶Liquid molecules slide past each other meaning they are not held in place.
▶Gas molecules are "excited" they bounce around everywhere meaning they are not held in place.
▶Plasma has no fixed shape or volume so it cant be held in place!
▶Solid molecules have a fixed shape so they cannot move on their own.
Hope I helped! Brainliest appreciated!
Liquid nitrogen, which has a boiling point of −195.79°C, is used as a coolant and as a preservative for biological tissues. Is the entropy of nitrogen higher or lower at −200°C than at −190°C? Explain your answer. Liquid nitrogen freezes to a white solid at −210.00°C, with an enthalpy of fusion of 0.71 kJ/mol. What is its entropy of fusion? Is freezing biological tissue in liquid nitrogen an example of a reversible process or an irreversible process?
Answer:
Explanation:
Entropy is measure of disorder so as we lower the temperature of gas , its entropy decreases .
Hence at - 200°C entropy of nitrogen will be less than that at - 190°C .
At freezing point ,
entropy of fusion = latent heat / freezing temperature
= .71 kJ / ( 273 - 210 )
= 710 / 63 J mol⁻¹ K⁻¹ .
= 11.27 J mol⁻¹ K⁻¹ .
entropy of fusion = 11.27 J mol⁻¹ K⁻¹ .
the further a star is away from Earth, the more it is
Answer: the more big it is
Explanation:
Answer:
The more it is red shifted.
Hope this helped, have a good day
a wet 43.2 g sample of copper sulfate heptahydrate is heated until only copper sulfate remains. the mass of the water lost is 34.1 g. what is the mass of copper sulfate
Answer:
9.1g
Explanation:
Given parameters:
Mass of copper sulfate heptahydrate = 43.2g
Mass of water lost = 34.1g
Unknown:
Mass of copper sulfate = ?
Solution
The copper sulfate heptahydrate is made up of the copper sulfate and water of crystallization which makes it wet.
Mass of copper sulfate heptahydrate = mass of copper sulfate + mass of water
Mass of copper sulfate = mass of copper sulfate heptahydrate - mass of water
Mass of copper sulfate = 43.2g - 34.1g = 9.1g
The mass of copper sulphate that is produce from a wet 43.2 g sample of copper sulphate heptahydrate that is heated until only copper sulphate remains (mass of water lost is 34.1 g) is 9.1 grams.
Using the law of conservation of matter, the mass of the reactant is equals to the mass of the product.
Therefore,
CuSO₄7H₂O → CuSO₄ + 7H₂O
mass of CuSO₄7H₂O = 43.2 g
mass of CuSO₄ = x
mass of H₂O = 34.1 g
mass of CuSO₄ = 43.2 - 34.1
mass of CuSO₄ = 9.1 g
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Where does cellular respiration occur?
A.in your stomach
B. in your lungs
C.in your circulatory system
D.in your cells
Convert 35 joules into calories.
OR 1.410 cal
OC 82,500 cal
OD. 1.420,000 cal
Answer:
0.83Cal
Explanation:
Given parameters:
Amount of energy given;
35J;
Convert to Cal;
1 calorie = 42 joules
x calories = 35 joules
Cross multiply;
42x = 35
x = [tex]\frac{35}{42}[/tex] = 0.83Cal
Which chemical equation is balanced?
A. CaO2 + HCl → CaCl2 + H20
B. CO2 + H2O + H2CO2
C. K+ H2O → K20 + H2
D. MgO + 2HCI – MgCl2 + H20
10 points if you answer fast
D. MgO + 2HCI – MgCl2 + H20
Further explanationThe chemical equation is said to be balanced if the number of atoms in the reactants is equal to the number of atoms in the product
A. CaO2 + HCl → CaCl2 + H20
atoms O, Cl and H are not the same
B. CO2 + H2O + H2CO2
atoms O are not the same
C. K+ H2O → K20 + H2
atoms K are not the same
D. MgO + 2HCI – MgCl2 + H20
Mg, left = 1, right=1
O, left=1, right=1
H, left=2, right=2
Cl, left=2, right=2
Chemical equation is balanced
Answer:
B. CO2 + H2O + H2CO2
Explanation:
Which of these ions has the correct charge?
O2-
B2+
P2-
Li2+
Answer:
B2
Explanation:
"+" contains positivity