Answers
Related Questions
TEST QUESTION PLS HELP What are isotopes? Write isotopes of three different elements, showing their atomic number and mass number. (I'll give brainliest)
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Answer:
Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons. The number of protons in a nucleus determines the element's atomic number on the Periodic Table
Explanation:
Hope this helps some? :)
What is the function of the urinary system?
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Answer:
Explanation:
The Urinary System's function is th filter blood and create urine as a waste by-product
Please give brainliest
Answer:
The urinary system's function is to filter blood and create urine as a waste by-product. The organs of the urinary system include the kidneys, renal pelvis, ureters , bladder and urethra.
I HOPE IT HELPS ❤❤How does oxygen become an ion with a -2 charge?
A. they gain two electrons
B. they lose two electrons
C. they share two electrons
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Answer:
they gain two electrons
Explanation:
because they gain negativity :)
Define conversion factor
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How many molecules are in 0.56 moles of NH3?
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Answer:
8.9x1023
Explanation:
(05.02 LC)
How many moles of each element are in one mole of Sr(HCO3)2? (3 points)
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Answer:
The number of moles of Sr in one mole of Sr(HCO₃)₂ = 1 mole
The number of moles of H in one mole of Sr(HCO₃)₂ = 2 moles
The number of moles of C in one mole of Sr(HCO₃)₂ = 2 moles
The number of moles of O in one mole of Sr(HCO₃)₂ = 6 moles
Explanation:
The given chemical formula of the compound is Sr(HCO₃)₂
The number of atoms of Sr in the compound = 1
The number of atoms of H in the compound = 2
The number of atoms of C in the compound = 2
The number of atoms of O in the compound = 6
The number of atoms of each element present in each formula unit of Sr(HCO₃)₂ is proportional to the number of moles of each atom in one mole of Sr(HCO₃)₂
Therefore;
The number of moles of Sr in one mole of Sr(HCO₃)₂ = 1 mole
The number of moles of H in one mole of Sr(HCO₃)₂ = 2 moles
The number of moles of C in one mole of Sr(HCO₃)₂ = 2 moles
The number of moles of O in one mole of Sr(HCO₃)₂ = 6 moles.
Answer:
the answer above is correct
Explanation:
i took the test
What is the molecular formula for CH2 with molar mass 90 g/mol?
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Answer:
CH2: (1×12g/mol)+(2×1g/mol)=14 g/mol.
Cu + 2AgNO3 → 2Ag + Cu(NO3)2
How many copper (Cu) atoms are there in Cu(NO3)2?
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How many significant figures does 0.058 040 have?
a.6
b.7
c.5
d.4
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Answer: c 5 because you don’t start counting until it hits a number >0 if it’s to the left of a decimal
Explanation:
Ice melting in a glass of iced tea is an example of a(n) __________ process (not necessarily a chemical reaction).
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when water is pushed out of the way it is said to be____________________.
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In which directions does liquid pressure act
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What Period # is this element found in? P
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Which element tends not to react with other elements?
A
xenon
B
hydrogen
C
phosphorous
D
potassium
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Answer:
I believe the answer is Xenon since it is a noble gas
Answer:
I think the answer is A
Explanation:
If im wrong the answer is C
Realice las siguientes conversiones: a) 72°F a °C, b) 213.8°C a °F, c)180°C a K, d) 315K a °F, e) 1750°F a K, f) 0K a °F.
Answers
Answer:
a) 72 °F= 22.22 °C
b) 213.8 °C= 416.84°F
c) 180 °C= 453.15 °K
d) 315 °K= 107.33 °F
e) 1750 °F= 1227.594 °K
f) 0 °K= -459.67 °F
Explanation:
Para realizar el intercambio de unidades debes tener en cuenta las siguientes conversiones:
Fahrenheit a Celsius: [tex]C=\frac{F-32}{1.8}[/tex]Celsius a Fahrenheit: °F= °C*1.8 + 32Celsius a Kelvin: °K= °C + 273.15Kelvin a Fahrenheit: F= (K -273.15)*1.8 + 32Fahrenheit a Kelvin:[tex]K=\frac{F-32}{1.8} + 273.15[/tex]Entonces se obtiene:
a) 72 °F= [tex]\frac{72-32}{1.8}[/tex]=22.22 °C
b) 213.8 °C= 213.8*1.8 + 32= 416.84°F
c) 180 °C= 180°C + 273.15= 453.15 °K
d) 315 °K= (315 -273.15)*1.8 + 32= 107.33 °F
e) 1750 °F= [tex]\frac{1750-32}{1.8} + 273.15[/tex]= 1227.594 °K
f) 0 °K= (0 -273.15)*1.8 + 32= -459.67 °F
Q.3.Which of the following chemical reactions is an acid-base reaction?
a. 4 C5H90 (1) + 29 02 (9) - 20 CO2 (g) + 18 H20 (9)
b. Ca (s) + F2 (g) - CaF2 (s)
c. HBr (aq) + NaOH(aq) - H20 (1) + NaBr (aq) O
d. 3 Pb (s) + 2 H3PO4 (aq) - 3 H2 (g) + Pb3(PO4)2 (aq)
Help me out please I'll make you brainliest answer
Answers
Answer:
C
Explanation:
Hbr is acidic
NaOH is a base
plus u get a salt from this equation as well as water
thank me later kid
When molybdate (MoO3) and Zinc (Zn) are heated together they react in this equation:
3Zn + 2MoO3 → Mo2O3 + ZnO
What is the mole ratio of Zn to Zno?
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Answer: The mole ratio of Zn to ZnO is 3: 3.
Explanation:
According to law of conservation of mass, mass can be neither be created nor be destroyed. The mass on reactant side must be equal to the mass on product side. Thus the atoms of each element on both side of the reaction must be same.
The balanced chemical reaction is:
[tex]3Zn+2MoO_3\rightarrow Mo_2O_3+3ZnO[/tex]
Here 3 moles of Zn combine with 2 moles of [tex]MoO_3[/tex] to give 1 mole of [tex]Mo_2O_3[/tex] and 3 moles of [tex]ZnO[/tex]. Thus the mole ratio of Zn to ZnO is 3: 3.
mixture is a
Pek the word that best completes the following sentence. A
mixture in which the composition is uniform throughout the mixture.
homogeneous
heterogeneous
compound
Need at
Answers
Answer:
compund
Explanation:
i took the quiz
HELP THIS IS DUE BY 11:59 TONIGHT ITS CURRENTLY LIKE 11:40??
identify: one herbivore, one carnivore, one omnivore, and one decomposer.
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herbivore: cow
carnivore: lion
omnivore: bear
decomposer: water mold
Answer:
rabbit, kingfisher,lizard, fungi
Explanation:
hrbivore is an organism which feeds on plants. carnivore is also an organism that feeds on other organism. omnivore is also an organism that feeds on other organisms. Decomposers arsle organisms that recycle nutrients.
Voltalc cells produce a positive overall charge. What does this indicate?
OA. The reaction is likely to be endothermic.
OB. The reaction is spontaneous.
OC. The reaction is not likely to occur.
OD. The reaction is not spontaneous.
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Answer:
The reaction is spontaneous.
Explanation:
If voltaic cell show positive charge it means reaction is spontaneous taking by itself.
Answer:
B. The reaction is spontaneous.
Explanation:
Edmentum
2. Which situation best represents conduction?
A. Heat from a campfire
B. A hot air balloon taking off
C. Touching a hot piece of metal
D. Getting sunburned
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Answer:
c
Explanation:
touching a hot piece of metal. because the energy or the hotness of the pot is touching your hand which is a direct contact.
How many mols is 8.86 x 1023 atoms of silver?
Answers
Answer:
1.44moles
Explanation:
Given parameters:
Number of atoms = 8.86 x 10²³atoms
Unknown:
Number of moles = ?
Solution:
From the mole concept;
Number of moles = [tex]\frac{number of atoms }{6.02 x 10^{23} }[/tex]
Number of atoms = 8.86 x 10²³atoms
Number of moles = [tex]\frac{8.68 x 10^{23} }{6.02 x 10^{23} }[/tex]
Number of moles = 1.44moles
HHHAAAAALLLPPPP
It’s due tomorrow
Answers
Answer:
D.
Explanation:
Only 0.0035% of the electromagnetic spectrum is visible to the human eye
Hopefully this helped :)
What are the units for speed
A. m/s
B. km/s ^ 2
C. m/s^2
D. m^2/s^2
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m/s is the correct answer of them.
How do you test for starch in green plant
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Answer:
1,Iodine solution is used to test leaves for the presence of starch. ...
2.After a few minutes, the parts of the leaf that contain starch turn the iodine from brown to blue/black.
3.The leaf on the left is a variegated leaf
Explanation:
Answer:
1.Iodine solution is used to test leaves for the presence of starch. ...
2.After a few minutes, the parts of the leaf that contain starch turn the iodine from brown to blue/black.
3.The leaf on the left is a variegated leaf.
Drew added yeast and sugar to lukewarm water and placed it in a flask. He
stretched a balloon over the opening of the flask. After several minutes, he noticed
small bubbles rising along the side of the flask as the balloon slowly began to inflate.
Drew concluded that -
A)a physical change was occurring
B) the bubbles indicated a chemical change
C) the water surger and yeast were products of a chemical reaction
D) the strong smell was evidence of a physical changer
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Drew added yeast and sugar to lukewarm water and placed it in a flask. Drew concluded that the bubbles indicated a chemical change. The correct option is B)
What are chemical changes?A chemical change is a change when the identity of a substance changes, and it converts into a new substance with new characteristics and a new identity.
When iron comes in contact with oxygen, it changes into rust, and it is a chemical change. A chemical change is a transformation in which the substance's chemical composition is altered through atom rearrangement. Atomic alterations cause changes in the molecular structure.
In the reaction, when yeast reacts with lukewarm water it forms bubbles, and in cold water, yeast does not perform well.
Therefore, the correct option is B) the bubbles indicated a chemical change.
To learn more about chemical changes, refer to the link:
https://brainly.com/question/29715141
#SPJ2
Write 0.000 000 000 402 000 in scientific notation.
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Answer:
0.000000000402000 in scientific notation is 4.02000 × 10-10
temperature is a measure of the ______ of an object. 1. kelvin 2. insulator 3. average KE 4. radiation 5. specific heat
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Answer:
5
Explanation:
Temperature calculates heat/the temperature in the specific location.
The geocentric theory was once accepted as an explanation of how objects were positioned in our solar system. Which statement best explains this theory?
A The orbits of the planets are elliptical and not circular
B The Sun is considered to be the center of the Universe
C Earth is considered to be the center of the revolving planets and stars
D The Sun is considered to be the center of the revolving planets and stars
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Answer: c
Explanation:
When a student squeezes a balloon, it changes shape. In which state of
matter is the substance inside the balloon?
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Answer:
gas
Explanation:
Answer:
Liquid and gas
Explanation:
