Answer:
sun shine
Explanation:
Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time
Answer:
Sunlight
Explanation:
Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. ... Also, the surface of Earth has reflected and scattered the light.
Which statement describes clean air as a natural source
Answer:
as I guess it is last statement
Which of the following have metallic bonding? 1. Magnesium chloride 2. Hydrogen chloride. 3. Magnesium. 4. Chlorine
Explanation:
Magnesium chloride has Ionic bonding.
Hydrogen chloride has Covalent bonding.
Chlorine has Covalent bonding.
Only Magnesium has metallic bonding (3).
please help im stuckkkk
Answer:
Just in case you want confirmation yes, its mid ocean ridge
Which compound has both ionic and covalent bonding? *
Ethanol
Glucose
Calcium carbonate
Dichloromethane
Answer:
Calcium carbonate
Explanation:
Ionic compounds that tend to have one or more polyatomic ions are the ones that tend to exhibit both ionic and covalent bonding. The only one that meets this is calcium carbonate.
A gas occupies 200ml at a temperature of 26 degrees Celsius and 76mmHg pressure. Find the volume at -3degree Celsius with the pressure remaining constant.
Answer:
184.62 ml
Explanation:
Let [tex]p_1, v_1,[/tex] and [tex]T_1[/tex] be the initial and [tex]p_2, v_2,[/tex] and [tex]T_2[/tex] be the final pressure, volume, and temperature of the gas respectively.
Given that the pressure remains constant, so
[tex]p_1=p_2[/tex] ...(i)
[tex]v_1[/tex] = 200 ml
[tex]T_1= 26 ^{\circ}C = 273+26 =299[/tex] K
[tex]T_2= 3 ^{\circ}C = 273+3 =276[/tex] K
From the ideal gas equation, pv=mRT
Where p is the pressure, v is the volume, T is the temperature in Kelvin, m is the mass of air in kg, R is the specific gas constant.
For the initial condition,
[tex]p_1v_1=mRT_1 \\\\mR= \frac{p_1v_1}{T_1}\cdots(ii)[/tex]
For the final condition,
[tex]p_2v_2=mRT_2 \\\\mR= \frac{p_2v_2}{T_2}\cdots(iii)[/tex]
Equating equation (i), and (ii)
[tex]\frac{p_1v_1}{T_1}=\frac{p_2v_2}{T_2}[/tex]
[tex]\frac{v_1}{T_1}=\frac{v_2}{T_2}[/tex] [from equation (i)]
[tex]v_2=\frac{T_2}{T_1} \times v_1[/tex]
Putting all the given values, we have
[tex]v_2=\frac{276}{299} \times 200 = 184.62 \; ml[/tex]
Hence, the volume of the gas at 3 degrees Celsius is 184.62 ml.
GIVING BRAINLEST TO WHOEVER HELPS ME AND GETS THE RIGHT ANSWER.
What is the energy source that powers plate movements ?
A. Magma and lava
B. Earth’s magnetic field
C. The sun
D. Earths not interior
guys please help me i really need help! pls and thank you!
Answer:
Hydrogen
Explanation:
YO SOMEONE ANSWER DIS ASAP I GOT 2 MINUTES
Answer:
Solids 1 and 3
Explanation:
Their melting points are almost identical and each element has a unique melting point.
A wave on a lake has a wavelength of 5.0 M and a Frequency of 4 Hz. What is the speed of the wave in m/s?
Answer:
The appropriate speed will be "20 m/s".
Explanation:
The given values are:
Wavelength,
λ = 5.0 M
Frequency,
f = 4 Hz
Now,
The speed of the wave will be:
⇒ [tex]V=f\times \lambda[/tex]
On putting the values, we get
⇒ [tex]=4\times 5.0[/tex]
⇒ [tex]=20 \ m/s[/tex]
Exercise 1.6
4students measered a mass of a piece of metalwhose accurate mass
34. 75 g Their results are 34.2 g, 33.75 g, 35.0 g, and 34.69 g.
a.What is the best estimate for the mass of the piece of metal? Explain why?
b.Explain whether the results are precise or accurate?
class???????????? and which chapter?????????
The reaction of magnesium chloride with silver nitrate gives a precipitate of silver chloride.
MgCl2(aq) + 2AgNO3(aq) + Mg(NO3)2(aq) + 2AgCl(s)
A solution containing 0.001 mol of magnesium chloride reacts with excess silver nitrate.
What is the mass of the precipitate formed?
[Molar mass/gmol-': AgCl = 143.4]
A 0.0729
B 0.1439
C 0.287g
D 0.574g
(Total for Question 5 = 1 mark)
Answer:
Mass = 0.287 g
Explanation:
Given data:
Number of moles of MgCl₂ = 0.001 mol
Mass of precipitate formed (AgCl) = ?
Solution:
Chemical equation:
MgCl₂(aq) + 2AgNO₃(aq) → Mg(NO₃)₂(aq) + 2AgCl (s)
now we will compare the moles of MgCl₂ and AgCl.
MgCl₂ : AgCl
1 : 2
0.001 : 2/1×0.001 = 0.002
Mass of AgCl:
Mass = number of moles × molar mass
Mass = 0.002 mol × 143.4 g/mol
Mass = 0.287 g
Aqueous magnesium chloride is added to aqueous silver nitrate. A white precipitate forms. Write the chemical equation for this reaction.
Answer:
1. Molecular equation
BaCl2(aq) + 2AgNO3(aq) –> 2AgCl(s) + Ba(NO3)2 (aq)
2. Complete Ionic equation
Ba²⁺(aq) + 2Cl¯(aq) + 2Ag⁺(aq) + 2NO3¯ (aq) —> 2AgCl(s) + Ba²⁺(aq) + 2NO3¯(aq)
3. Net ionic equation
Cl¯(aq) + Ag⁺(aq) —> AgCl(s)
Explanation:
Answer:
The symbol for magnesium chloride is MgCl2 and silver nitrate is Ag(NO3)2 so the equation will be :
MgCl2 + Ag(NO3)2 → AgCl2 + Mg(NO3)2
In animals, energy is produced by the:
A. chloroplast
B. endoplasmic reticulum
C. mitochondria
D. nucleus
Answer:
C. Mitochondria
Explanation:
When 1000 C of charge is passed through CuSO4 solution, x g of copper is deposited. How much charge should be passed through the solution to deposit 5x g of copper?
Number of charge = 5018 C
Further explanationGiven
1000 C of charge for x grams of copper
Required
Number of charge
Solution
Faraday's Law :
[tex]\tt W=\dfrac{e.i.t}{96500}\\\\W=\dfrac{e.Q}{96500}[/tex]
For 1000 C, W = x grams
[tex]\tt x=\dfrac{1000.e}{96500}=0.0104e[/tex]
For 5x grams :
[tex]\tt 5x=\dfrac{e.Q}{96500}\\\\5\times 0.0104e=\dfrac{e.Q}{96500}\\\\Q=\dfrac{96500\times 5\times 0.0104e}{e}=5018~C[/tex]
define effervesence
Answer:
is the getting out of a gas in a water solution or it the property of forming bubbles
i need help on this science question
Answer:
C
Explanation:
The kinetic energy of a body is the energy due to the motion of a body. It is mathematically given as;
Kinetic energy = [tex]\frac{1}{2}[/tex] m v²
m is the mass of the body
v is the velocity
Now, let us find the K.E from the given choices;
Option C will have the greatest kinetic energy;
mass = 0.14kg , v = 40m/s
Kinetic energy = [tex]\frac{1}{2}[/tex] x 0.14 x 40² = 112J
When a pendulum swings, at which point is kinetic
energy highest:
Answer:
3
Explanation:
What are the different states of matter and how do they transition from one to
the other? Help plz
Solid is the state in which matter maintains a fixed volume and shape; liquid is the state in which matter adapts to the shape of its container but varies only slightly in volume; and gas is the state in which matter expands to occupy the volume and shape of its container.??.....
What kind of bond is present in HCI
A. Valence Bond
B. Ionic Bond
C. Metallic bond
D. Covalent Bond
Copper carbonate (CuCO3) reacts with hydrochloric acid (HCl) according to this equation:
CuCO3(s) + 2HCl(aq) → CuCl2(aq) + H2O(l) + CO2(g).
Which statement correctly describes the substances in this reaction?
A.
Exactly one product and two reactants are either liquid or dissolved in water.
B.
Exactly one of the reactants is in a water-based solution, but none of the products are.
C.
The reactants include both a liquid and a gas.
D.
Exactly one reactant is a solid, and exactly one product is a gas.
E.
The products include a solid, a liquid, and a gas.
Answer:
d
Explanation:
plato
Answer:
d
Explanation:
what is the specific heat of the following materials:
aluminum
water
rubbing alcohol
cooking oil
Answer:the sun
Explanation:leqjs
Let's look it up
Aluminium:-
0.89 J/kg°CWater:-
4.186J/g°CAlcohol:-
0.588cal/g°CCooking oil:-
1.67Kj/kg°C6.3 moles of water h20
Answer:
6.3 moles of water = 6.3*18=113.4 grams per mole
Explanation:
Is NaHCO3 a compound? Explain pls!
Answer:
Yes it is
Explanation: because it is composed of identical molecules consisting of atoms of two or more chemical elements.
hope it helps <3
Need help fast please!
Find the mass of 4.56 mols of LaPO4
Answer:
Mass = 1080.26 g
Explanation:
Given data:
Number of moles of LaPO₄ = 4.56mol
Mass in gram = ?
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of LaPO₄ = 236.9 g/mol
by putting values,
4.56 mol = mass/ 236.9 g/mol
Mass = 4.56 mol × 236.9 g/mol
Mass = 1080.26 g
What is the energy required to go from a solid to a liquid called?
A. The latent heat of fusion
B. The thermal energy of a substance
C. The latent heat of vaporization
D. The specific heat capacity
Answer:
enthalpy of fusion also called heat of fusion
Convert 12.5 km/L to mi/gal.
Answer:
29.40182
Explanation:
Please help correct answers only please
Answer:
Empirical formula is C₅H₁₂O
Molecular formula = C₅H₁₂O
Explanation:
Given data:
Percentage of hydrogen =13.75%
Percentage of carbon = 68.11%
Percentage of oxygen = 18.15%
Empirical formula = ?
Solution:
Number of gram atoms of H = 13.75 / 1.01 = 13.6
Number of gram atoms of O = 18.15 / 16 = 1.13
Number of gram atoms of C = 68.11 / 12 = 5.68
Atomic ratio:
C : H : O
5.68/1.13 : 13.6/1.13 : 1.13/1.13
5 : 12 : 1
C : H : O = 5 : 12 : 1
Empirical formula is C₅H₁₂O.
Molecular formula:
Molecular formula = n (empirical formula)
n = molar mass of compound / empirical formula mass
Empirical formula mass :
5×12 + 12×1.01 + 16×1 = 88.12 g/mol
n = 88.17/ 88.12
n = 1
Molecular formula = n (empirical formula)
Molecular formula = 1 (C₅H₁₂O)
Molecular formula = C₅H₁₂O
ygyjhu went to the store and bumped into afghsiugshjkds
Answer:
well dont hurt yourself
Explanation:
its not very good to
Wut is answer pls???
Answer:
7 no ans is C
8 no ans use of magnet .I am not sure
This drawing shows a human body system.
What is the primary function of this body system?
A. The transport of nutrients, water, and oxygen to body cells.
B. The chemical breakdown of food into smaller pieces.
C. The protection of vital organs from injury.
D. The production of hormones that regulate growth and metabolism.
Answer:
This question is incomplete
Explanation:
This question is incomplete because of the absence of the drawing referred to in the question.
However, each option refers to a particular respiratory system and with the organs and the tissues mentioned here one can eventually identify which option is correct when the drawing is available.
A) The system described here is the cardiovascular system (or the circulatory system). This system involves the heart, blood vessels and the blood (which are what help in the transport of the materials mentioned in the question).
B) The system described here is the digestive system. This system involves the gastrointestinal tract and organs (that assist in the production/secretion or storage of chemicals that breakdown food into smaller pieces) such as the mouth, esophagus, stomach, small intestine, large intestine, rectum and the anus.
C) The system described here is the skeletal system. This system involves all the bones and joint in the body (the skeleton) which also helps in protecting organs in the body.
D) The system described here is the Endocrine system. This system involves several internal glands (such as the thyroid gland and the adrenal glands) in the body.
NOTE: Identify which organ and/or tissue is present in the diagram and use that to select the appropriate option from the description of each of the options provided above.
Answer:
b
Explanation: