Answer:
Mixtures can be physically separated by using methods that use differences in physical properties to separate the components of the mixture, such as evaporation, distillation, filtration and chromatography.
Explain how a sedimentary rock can turn into a metamorphic rock.
Answer:
When Sedimentary rocks are buried deep beneath the Earth's surface, great pressure and tremendous heat change these rocks into new rocks containing different minerals. These are Metamorphic rocks.
Explanation:
Drag the images into the correct category.
Contact Forces
Noncontact Forces
Answer:
Where are the categories, we need an image for reference or something to better understand the question
A sample substance has the chemical formula:
H2CO3
One molecule of the sample contains -
Two different elements with atomic numbers 1 and 27
Two different elements with atomic numbers 1, 6, and 8
Two different elements with atomic numbers 2 and 29
Two different elements with atomic numbers 2, 8 and 20
Answer:
1,6,8
Explanation:
Periodic Table- H=1.C=6,O=8
Hydrogen is H, Carbon is C, Oxygen is O
One molecule of the sample contains three different elements with atomic numbers 1,6 and 8.
What is an element?Element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.Each element has its own characteristic property.
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Your question is incomplete, but most probably your full question was,a sample substance has the chemical formula:
H2CO3
One molecule of the sample contains -
Two different elements with atomic numbers 1 and 27
Two different elements with atomic numbers 1, 6, and 8
Two different elements with atomic numbers 2 and 29
Two different elements with atomic numbers 2, 8 and 20
Three different elements with atomic numbers 1,6 and 8
Which of the following set of atoms has the largest electronegativity difference?
a. H and P
b. N and C
c. Li and O
d. Cl and Ca
Answer:
C
Explanation:
Li has an electronegativity of 0.98, O has an electronegativity of 3.44. 3.44-0.98= 2.46 electronegativity differnece :)
True or False:Excessive thermal energy will result in the removal of salt from the oceans.
Answer:
false
Explanation:
the excessive heat would cause the water to evaporate so it wouldn't remove the salt it would remove the water. what you would get would be an ocean bed with tons of salt at the bottom.
which element has a higher atomic number of aluminum or oxygen
Answer:
aluminum
Explanation:
oxygen's atomic number is 8.
aluminum's atomic number is 13.
What is the specific heat of a substance that absorbs 2500 joules of heat when a sample of 100g of the substance increases in temperature from 10.°C to 70.°
Answer:
0.417 J/gºC
Explanation:
From the question given above, the following data were obtained:
Heat (Q) absorbed = 2500 J
Mass (M) of substance = 100 g
Initial temperature (T1) = 10 °C
Final temperature (T2) = 70 °C
Specific heat capacity (C) =?
Next, we shall determine the change in temperature (ΔT). This can be obtained as follow:
Initial temperature (T1) = 10 °C
Final temperature (T2) = 70 °C
Change in temperature (ΔT) =?
Change in temperature (ΔT) = T2 – T1
Change in temperature (ΔT) = 70 – 10
Change in temperature (ΔT) = 60 °C
Finally, we shall determine the specific heat capacity of the substance as follow:
Heat (Q) absorbed = 2500 J
Mass (M) of substance = 100 g
Change in temperature (ΔT) = 60 °C
Specific heat capacity (C) =?
Q = MCΔT
2500 = 100 × C × 60
2500 = 6000 × C
Divide both side by 6000
C = 2500 / 6000
C = 0.417 J/gºC
Therefore, the specific heat capacity of substance is 0.417 J/gºC
Mrs. Moran and Mr. Moran decided to move the cabinet in their dining room. Mrs.
Moran stood on one side, and Mr. Moran stood on the other. They each pushed
with 30 N of force. What was the net force on the cabinet?
Answer:
60N
Explanation:
The net force on the cabinet is 60N.
Net force is that single force that will act like all other forces on a body. The direction of the force and magnitude is very important when resolving forces.
Force applied by Mrs. Moran = 30N
Force applied by Mr. Moran = 30N
Since they each stood on both sides and pushed, the net force will be 30N + 30N = 60N
Answer: 0
Explanation: If they both pushed a force of 30N then it doesn’t add up but instead you subtract. so it’s 0. ur yw ;)
7. Where can electrons be found in an atom?
- electron cloud
- nucleus
- both nucleus and electron cloud
- electrons cannot be found in atoms
What type of change goes on inside when a glow stick is activated?
Chemical
Physical
Both
Answer:
Chemical
Explanation:
What is the concept of Dimensional Analysis?
Answer:
In engineering and science, dimensional analysis is the analysis of the relationships between different physical quantities by identifying their base quantities (such as length, mass, time, and electric charge) and units of measure (such as miles vs. kilometers, or pounds vs. kilograms) and tracking these dimensions as
Explanation:
A substance has a molecular formula of C8H10N4O2
The empirical formula of a substance = C₄H₅N₂O
Further explanationThe empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
(empirical formula) n = molecular formula
((empirical formula)n=C₈H₁₀N₄O₂
divide by 2 :
(C₄H₅N₂O)₂=C₈H₁₀N₄O₂
A 5.0-mL sample of CO2 gas is enclosed in a gas-tight
syringe (Figure 11.3) at 22 °C. If the syringe is
immersed in an ice bath (0 °C), what is the new gas
volume, assuming that the pressure is held constant?
Answer:
3.5ML
Explanation:
At the constant pressure, the final volume of the carbon dioxide gas was equal to 4.62 ml at a temperature of 0ºC.
What is Charles's law for volume-temperature relation?Charles's law can be explained as when the pressure of the gas is kept constant, the volume of gas is directly proportional to the temperature of a gas.
The volume of the gas and the temperature of the gas have a direct relationship according to this law.
Therefore, V∝ T
or V₁/T₁ = V₂/T₂ ....................(1)
Given, the initial temperature of the CO₂ gas, T₁ = 22 ºC
T₁ = 22 + 273 = 295 K
The final temperature of the CO₂ gas, T₂ = 0ºC
T₂ = 0 + 273 = 273 K
The initial volume of the gas, V₁ = 5 ml
Substitute the value of V₁, T₁, and T₂ in equation (1 ) to get final volume of CO₂ gas:
5/295 = V₂/273
V₂ = 4.6 ml
Therefore, the final volume of the gas is equal to 4.6 ml at 0 ºC, when there is no change in the pressure.
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Calculate the mass of 0. 4 moles of water.
Answer:
7.208 g
Explanation:
0.4mol x [tex]\frac{2(1.01) + 16.00 g}{1 mol}[/tex]
= 7.208 g
You are using molar mass of H20 to find the mass. Moles of 0.4 and 1 mol cancel out leaving you with just grams. You get the values in the numerator from the periodic table and the 2(1.01) is because you have 2 of the H in H20
A can was filled with crushed ice, sealed, and massed. The ice was melted by slowly warming the can and its contents. No water vapor escaped and no air entered the can. If the can is then massed again after the ice has melted, what is the best prediction of the mass?
A) The mass would be the same.
B) The mass would be more.
C) The mass would be less.
D) It is impossible to predict without more information.
Answer:
A) The mass would be the same.
Explanation:
Since there is no loss of any particle to vapor during the phase change process from solid to liquid, the mass of the before and after the process will remain the same.
In this way, the law of conservation of mass is obeyed. Mass is the amount of matter contained in a substance. Since there is no room for escape or matter loss, the mass will remain the same.Answer:
be the same
Explanation:
Why do lunar and solar eclipses not happen every month?
-Eclipses only occur during full and new moons.
-Earth rotates around its axis faster than the moon.
-The moon and Earth only travel through the penumbras.
-The moon’s axis does not always align with Earth’s shadow.
Answer:
i think its the last one
In coastal ecosystems as sea otters populations decline sea urchins populations
Increased
Decreased
Remained the same
None of the above
FISICOQUIMICA HIDROSTATICA
An object has a mass of 60 ounces and a volume of 30 cups. What is the density? _______ oz/cup (your answer should *only* be a number, round to one decimal place if needed) *
Answer:
2.0
Explanation:
Given data:
Mass of object = 60 ounce
Volume of object = 30 cups
Density = ?
Solution:
d = mass/ volume
d = 60 ounce/ 30 cup
d = 2.0 oz/cup
Thus, density of object is 2.0 oz/cup.
Match the word on the left with the definition on the right.
____ black dwarf e. star left at the core of a planetary nebula
____ white dwarf g. a red super giant star explodes
____ nebula c. what a medium-mass star becomes at the end of its life
____ protostar b. a large cloud of gas or dust in space
____ supernova a. exerts such a strong gravitational pull that no light escapes
____ neutron star d. the earliest stage of a star ’s life
____ black hole f. the remains of a high mass star
Answer:
Black dwarf- C
white dwarf- F
nebula- B
protostar-D
supernova-G
black hole-A
The chemical equation shows only the reactants and one product. How many H atoms must be present in the second product that is formed?
Answer: In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products. If we count the number of hydrogen atoms in the reactants and products, we find two hydrogen atoms.
For a certain chemical reaction, the bond energy of the reactants is 43 kJ, and 35 kJ of energy is released. For energy to be conserved, what is the bond energy of the products?
Answer:
78kJ
Explanation:
Energy change = Energy in (reactants) - Energy out (products)
According to this question, energy is released, meaning that the reaction is EXOTHERMIC. Hence, the energy change will be negative (-) i.e bond energy of reactants is greater than bond energy of products.
Energy in = bond energy of reactants = 43kJ
Energy out = bond energy of products = ?
Energy change of exothermic reaction = -35kJ
Therefore;
-35kJ = 43kJ - x
x = 35kJ + 43kJ
x = 78kJ
The bond energy of the products is 78kJ.
HURRY FAST. It is known that complex carbohydrates provide more sustained energy over time than simple sugars such as sucrose. Complex carbohydrates are polysaccharides, which are long chains of smaller sugar molecules bonded together. Simple sugars are monosaccharides that contain only one molecule. Why do complex carbohydrates provide more energy over time versus simple carbohydrates? Complex carbohydrates have more chemical bonds to break than simple sugars, which takes longer for the body to digest and provides more units of energy for the body to use. Complex carbohydrates have bonds that contain more thermal energy than those in simple carbohydrates, which is released when they go through the digestive process. Complex carbohydrates provide Calories for the body while simple carbohydrates provide calories. Calories are bigger than calories and provide more energy. Complex carbohydrates take less energy to digest, which means that the body does not spend all of its calories digesting the food. This saves calories for the body to use later.
Answer:
Complex carbohydrates have more chemical bonds to break than simple sugars, which takes longer for the body to digest and provides more units of energy for the body to use.
Explanation:
Complex carbohydrates contain longer chains of sugar molecules than simple carbohydrates. The body converts these sugar molecules into glucose, which it uses for energy. As complex carbohydrates have longer chains, they take longer to break down and provide more lasting energy in the body than simple carbohydrates.
Answer
The answer is A if you want it simplifited.
from the guy above
PLEASE HELP ME!!!!
Answers are below the sentence
Answer:
Mass
Explanation:
Which atom in the following sets has the larger atomic radius?
a. Rn, Ne, Ar, Kr
b. Hg, Cs, Po, W
c. Mg, P, Al, Ar
Answer:
A.Rn,Ne,Ar,Kr.......
Someone help me please i’ll give brainly
Answer:
Condensation
Explanation:
Which compound in the picture has a central atom with four outside atoms and has at least one nonpolar bond.?
Answer:
The correct answer is option B, that is, methane.
Explanation:
In the given question, the compound in option B is methane. It is a compound that exhibits two elements, that is, hydrogen and carbon. It possesses a central atom, which is encircled by four atoms of hydrogen. The chemical formula for the compound is CH4.
The outer atoms in methane are dipoles and exhibits in the same orientation. This property of methane makes it completely a non-polar molecule. The compound itself is non-polar and exhibits non-polar bonds.
How does the suns energy contribute to the movement of water in the water cycle?
Answer:
The sun is what makes the water cycle work. ... Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds... clouds that move over the globe and drop rain and snow. This process is a large part of the water cycle.
Explanation:
Answer it doesn't contribute
Explanation: it doesn't contribute
water traveling in a circular motion when heating up a example of
A. Conduction
B. Convection
C. Radiation
D.none of these
Answer:
B.convection
Explanation:
Convection is the circular motion that happens when warmer air or liquid — which has faster-moving molecules, making it less dense — rises, while the cooler air or liquid drops down
help
if you start with a substance as a solid what will happen to the molecules as you add thermal energy (heat)?
Answer: One change of state happens when you add energy to the substance. This change of state is called melting. By adding energy to the molecules in a solid the molecules begin to move quicker and can break away from the other molecules.
Explanation: I hoped that helped!