Answer:
The number of drops depends upon the size of the drops. So, basically, 1 ml has a drops of 20
so 2000 mo will have a 40k drops
A family consumes 2.5 gallons of milk per week. How many liters of milk do they need to buy for one month? (Assume there are exactly 4 weeks in 1 month) SHOW WORK
Answer:
37.85 liters
Explanation:
they need 10 gallons for a month (2.5*4)
after that, convert gallons to liters (conversion to liters= 3.785)
10*3.7585= 37.85
PLEASE ANSWER FAST DUE IN 2 MINUTES
The gas released by animal into the environment is ______
Answer:
Carbon dioxide gas
Explanation:
When an animal breathes, it takes in oxygen gas and releases carbon dioxide gas into the atmosphere.
Where must you be standing if the Sun appears to be directly overhead at noon?
O A. At the South Pole
O B. At the North Pole
O C. At a point somewhere along the prime meridian
O D. At a point somewhere along the equator
Answer:
D
Explanation:
at a point somewhere along the equator
In the case when the Sun appears to be directly overhead at noon should be along with the equator.
What is the equator?It is considered to be the imaginary line that should be arounded with the middle of the planet or the celestial body. It is halfway that lies between the North Pole and the South Pole, at 0 degrees latitude. In the equator, it divides the planet into a Northern Hemisphere and a Southern Hemisphere
Therefore, based on the above explanation, the option d is correct.
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please help me I will give brainesty if your right
Answer:
Sunlight
Explanation:
My science teacher has told us that plants need the sun to photosynthesis. And even though their is a lot of sun, they need to compete for it still.
Help me asap it’s for my chem
Given the following information:
Heat of sublimation of Li(s) = 166 kJ/mol
Bond energy of HCl = 427 kJ/mol
Ionization energy of Li(g) = 520. kJ/mol
Electron affinity of Cl(g) = -2349 kJ/mol
Lattice energy of LiCl(s) = -2829 kJ/mol
Bond energy of H₂ = -432 kJ/mol
Calculate the net change in energy for the following reaction:
2Li(s) + 2HCl(g) --> 2LiCl(s) + H₂(g)
Answer:
Ya'll should really practice more because things like these are easy
Explanation:
You guys need to practice more since stuff like this are pretty simple.
What is net change?According to the net change theorem, the ultimate value of a quantity equals the beginning value plus the integral of the rate of change when a quantity changes. The net change can be positive, negative, or zero.The term "Net Change in Cash" indicates how much Cash and Cash Equivalents changed in value during the reporting period. It is the main punchline of the Cash Flow Statement. Net Cash Change quantifies how much the value of Cash and Cash Equivalents changed during the reporting period. The main punchline on the Cash Flow Statement is this. When using net cash as a barometer to determine a company's financial health, it is critical to analyse what activities contribute to positive or negative net cash.To learn more about net change refer to:
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Given the unbalanced equation showing the reactants and product of a reaction occurring at 298 K and 100. kPa:
____P4(s) + ____Cl2(g) ____PCl3(l) + energy
Balance the equation below for the reaction, using the smallest whole number coefficients.
____P4(s) + ____Cl2(g) ____PCl3(l) + energy
Balanced equation
P4(s) +6Cl2(g) ⇒4PCl3(l) + energy
Further explanationGiven
Reaction(unbalnced)
P4(s) +Cl2(g) ⇒PCl3(l) + energy
Required
Balanced equation
Solution
Give a coefficientaP4(s) +bCl2(g) ⇒PCl3(l) + energy
Make an equationP, left=4a, right=1⇒4a=1⇒a=1/4
Cl, left=2b, right=3⇒2b=3⇒b=3/2
The equation becomes:
1/4P4(s) +3/2Cl2(g) ⇒PCl3(l) + energy x 4
P4(s) +6Cl2(g) ⇒4PCl3(l) + energy
How many moles are in 5.32 x 1020 atoms
of copper?
What is the answer but in numbers ?
Answer is 1.41 x 10 with the exponent of 24, atoms
Explanation : Look at the picture i attached.
You can tell if an object is in motion if ___.
A. Its reference point is in motion
B. Its reference point is stationary
C. Its position changes relative to a reference point
D. It appears to move backward when another object moves forward
Answer:
c
Explanation:
I think that's the answer
Question 6 of 10
What is an anode?
A. The electrode that is oxidized in a galvanic cell
B. The solution inside a salt bridge
C. The electrode that is reduced in a galvanic cell
D. The electrolytes around an electrode
SUBMIT
Answer:
I believe the answer is A, sorry if i'm wrong
Explanation:
What is the correct name for H3AsO3
Answer:
arsenous acid
Explanation:
TOPICAL ASSINMENT 2
1. If 25cm' of O.IM H,SO, solution neutralised a solution containing 1.06g anhydrous sodium carbonate in
250cm. of solution, calculate the molarity and the volume of the sodium carbonate solution used. (3mks)
The molarity = 0.04 M
The volume = 6.25 ml
Further explanationGiven
25cm³ of 0.1 M H₂SO₄
1.06g Na₂CO₃ in 250cm³ of solution
Required
the molarity and the volume of Na₂CO₃
Solution
Molarity of Na₂CO₃ :
[tex]\tt \dfrac{1.06/106~mol}{0.25~L}=0.04~M[/tex]
Reaction
H₂SO₄ + Na₂CO₃ ⇒Na₂SO₄ + H₂O + CO₂
mol H₂SO₄ = 25 x 0.1 = 0.25 mlmol= 2.5 x 10⁻⁴ moles of Na₂CO₃
The volume of solution used :
[tex]\tt V=\dfrac{n}{M}=\dfrac{2.5.10^{-4}}{0.04}=6.25.10^{-3}~L=6.25~ml[/tex]
Determine whether each melting point observation corresponds to a pure sample of a single compound or to an impure sample with multiple compounds.
The question is incomplete, the complete question is;
Determine whether each melting point observation corresponds to a pure sample of a single compound or to an impure sample with multiple compounds.
Experimental melting point is BELOW literature value
Experimental melting point is CLOSE to literature value
WIDE melting point range
NARROW melting point range
Answer:
narrow melting point-pure sample of a single compound
experimental melting point is close to literature value-pure sample of a single compound
wide melting point range-impure sample of multiple compounds
experimental melting point is below literature value-impure sample of multiple compounds
Explanation:
The experimental melting point of a pure single compound is sharp and extremely close to the melting point of the substance as recorded in the literature. Usually, a pure substance melts within a narrow range of temperatures.
Impure samples of multiple compounds melt over a range of temperatures. Also if the experimental melting point is well below the record in literature, then the sample is contaminated by other compounds.
How many grams of lithium chloride, molecular mass 42.5, are dissolved in water to make 500 mL of a 0.450 M solution?
A) 9.56g
B) 42.50g
C)21.25g
D)47.22g
Answer:
9.5625 gram
Explanation:
Molarity = mass in gram ÷ molar mass × volume in dm3
Mass in gram = molarity× molar mass × volume of solution in dm3
Mass in gram = 0.450×42.5×0.5=9.5625 g
Why do scientists often use bacteria to produce medicines?
Answer:
Bbbbb eg2020
Explanation:
Bbbbb
what is a substrate
Answer:
a substrate is surface or material on or from an organism lives, grows, or obtains its nourishment.
Explanation:
Hey I hope this helps.....
Explain the horizontal periodic trend
Answer:
Trends on the Periodic Table have a vertical component and a horizontal component. Vertical trend: as more “shells” are added to the electron cloud, it expands. Horizontal trend: if atoms have the same number of “shells”, atoms with more protons will draw the electron cloud in tighter.
Explanation:
A student spends 4.5 hours studying for a test. How much time is this equivalent to in seconds
Select one:
a)2,700 seconds
b)16,200 seconds
c)270 seconds
d)6,480 seconds
What is at the center of every atom?
an electron
a compound
a molecule
a nucleus
#2 - Which two particles make up the nucleus of an atom? *
protons and electrons
protons and neutrons
molecules and compounds
neutrons and electrons
#3 - What is the role of an electron in an atom? *
electrons live inside the nucleus and carry a neutral charge
electrons circle the nucleus and have a positive charge
electrons circle the nucleus and have a negative charge
electrons live inside the nucleus and have a negative charge
#4 - In an atom, what is the number of protons equal to? *
the number of electrons
the number of neutrons
the number of molecules
the number of nuclei
#5 - Which of the following determines the type of element that an atom makes? *
the size of the nucleus
the number of protons
how much the atom weighs
the number of neutrons
#7 - What is a compound? *
the center of an atom that is formed by neutrons, protons, and electrons
a tiny particle that makes up all matter
a molecule that is formed from two or more different types of atoms.
a molecule that is formed from the same type of atoms
The annswer are -
1. the center of an atom is a nucleus
2. protons and neutrons
3. electrons circle the nucleus and have a negative charge
4. the number of electrons
5. the number of protons
7. a molecule that is formed from two or more different types of atoms.
What is the explanation for these?1. The nucleus is at the center of every atom and contains protons and neutrons, while electrons orbit around the nucleus.
2. Protons and neutrons make up the nucleus of an atom, providing mass and stability.
3. Electrons circle the nucleus in specific energy levels and have a negative charge, playing a role in chemical bonding and interactions.
4. The number of protons in an atom is equal to its atomic number and determines the element it belongs to.
5. The number of protons in an atom specifically determines the type of element it represents.
7. A compound is a molecule formed from different types of atoms, combining chemically to create a new substance.
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What is the momentum of a bird with a mass of 2 kg flying at 9 m/s? *
Answer:
18 kg.m/sExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocity
From the question we have
momentum = 2 × 9
We have the final answer as
18 kg.m/sHope this helps you
What does bananas batteries and people have in common
PLEASE HELP THIS IS OVER DUE AND I NEED TO GET IT DONE IM REALLY BAD AT CHEMISTRY
In which state of matter (Solid, liquid, or a gas) do atoms/particles move the fastest?
Answer:
GasExplanation:
I hope it helps ❤❤❤.......
Answer:
Gas
Explanation:
Solid= Particles are really tight (Example: Ice Cube) Has a fixed shape
Liquid= Particles flow freely but is of constant volume.(Liquid fills it's container. Example: Water) No fixed shape
Gas= Particles move freely can fill its container has NO FIXED SHAPE or NO FIXED VOLUME(Example: Oxygen) Particels move FASTEST
atoms or helium nickel would represent _____
Answer:
they represent their own atoms
Answer:
Elements
Explanation:
An atom has 38 protons and 42 neutrons it is ?
Answer:
The answer is, Strontium
Answer:
Name Molybdenum
Atomic Mass 95.94 atomic mass units
Number of Protons 42
Number of Neutrons 54
Number of Electrons 42
Explanation:
What happens when the number of electrons and protons inside of an atom are Not equel?
Hello, It's me Moriah Elizabeth!
Answer:
When the number of electrons does not equal the number of protons, the atom is ionized.
What types of radiation cause the parent isotope to change into a different element?
Answer:
Beta decay is most common in elements with a high neutron to proton ratio. Gamma decay follows the form: In gamma emission, neither the atomic number or the mass number is changed. A high energy gamma ray is given off when the parent isotope falls into a lower energy state.
Explanation:
pls mark me as brainliest
EZ MODE -_- What could you do in an experiment to get more accurate results? Change two of your variables. Only make observations that involve sight. Only use new materials. Perform repeated trials
Answer:
they change the object hehehehe
Answer:
D. Perform repeated trials.
Explanation:
I did the exam and got it correct :D!
Which of the following groups of elements has two valence electrons and is highly reactive?
Select one:
a. Alkali metals
b. Alkaline-earth metals
c. Halogens
d. Noble gases
explain how to find the mass of water. show your calculations as well
Answer:
You can find the mass of water by multiplying the density of water by its volume.
mass = Density x volume
Explanation:
It is very easy to find the mass of water once you know the formula of density. "Density" refers to mass per unit volume.
Density (ρ) = [tex]\frac{mass}{volume}[/tex]
Therefore, mass = ρ x volume
The density of water is 1 kg/L.
For example, if the volume of water is 500 ml, then you can get its mass by multiplying 500 ml by 1 kg/L.
Let's convert 500 ml to Liter first.
500 ml x [tex]\frac{1 L}{1,000 ml}[/tex] = 0.5 L
Now, let's compute.
mass = ρ x volume
mass = 1 kg/L x 0.5L
mass = 0.5 kg
The mass of a 500-ml water is 0.5 kg.
5(a) Consider the following schemes
Petroleum
>petroleum fractions
Higher petroleum fractions 1 , petrol + x
X + Y MI >CH,CICH,CI
nX"V (CH2 - CH2 - CH2-CH2)n
(i) State the type of reaction involved in I to IV
Answer:
is number 1
Explanation:
cause i know