Answer: To determine the elements on other planets. The Mercury Surface, Space Environment, Geochemistry, and Ranging (MESSENGER) Gamma-Ray Spectrometer (GRS) can measure gamma rays emitted by the nuclei of atoms on planet Mercury's surface that are struck by cosmic rays.
Explanation:
PLEASE HELP!!!
A piece of wood has a mass of 2.85 g; when placed in 20.0 mL of water, the water volume increased to 23.4 mL. What is the density of this piece of wood?
_______ Answer _______Units
Answer:
d = 0.84 g/cm³
Explanation:
Given data:
Mass of wood = 2.85 g
Volume of water = 20.0 mL
Volume of water + wood = 23.4 mL
Density of wood = ?
Solution:
Volume of wood = (Volume of water + wood ) - Volume of water
Volume of wood = 23.4 mL - 20.0 mL
Volume of wood = 3.4 mL
1 mL = 1 cm³
Density of wood:
d = m/v
d = 2.85 g / 3.4cm³
d = 0.84 g/cm³
how many moles of oxygen in 36.55 grams of CO2
Answer:
1.66 moles of oxygen
Explanation:
Given data:
Mass of CO₂ = 36.55 g
Number of moles of O = ?
Solution:
Number of moles of CO₂ = mass/molar mass
Molar mass of CO₂ is 44 g/mol
Number of moles = 36.55 g/ 44 g/mol
Number of moles = 0.83 mol
1 mole of CO₂ contain 2 moles of oxygen.
0.83 × 2 = 1.66 moles of oxygen
What is the mass of 35.0L of oxygen?
Answer:15.9994 g/mol
Explanation:
What group on the Periodic Table contains the elements of the alkaline
earth family?
Answer:
The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
Explanation:
hope that helps
99 POINTS!! Question: Tell what information each number or symbol in a chemical formula tells you. (Please be specific :)
1. subscript
2. coefficient
3. parentheses
4. element symbol
5. no number written
Answer: A subscript or superscript is a character that is set slightly below or above the normal line of type, respectively. It is usually smaller than the rest of the text. Subscripts appear at or below the baseline, while superscripts are above.
a coefficient is a constant term related to the properties of a product. In the equation that measures friction, for example, the number that always stays the same is the coefficient.
Parentheses are used in mathematical expressions to denote modifications to normal order of operations (precedence rules). In an expression like , the part of the expression within the parentheses, , is evaluated first, and then this result is used in the rest of the expression.
Chemical symbols are abbreviations used in chemistry for chemical elements, functional groups and chemical compounds. Element symbols for chemical elements normally consist of one or two letters from the Latin alphabet and are written with the first letter capitalized.
That there are no numbers present in the chemical formula means that there is one atom of each element present in the molecule. The Periodic Table reveals that Na is the symbol for sodium, and Cl is the symbol for chlorine.
Explanation:
Is this Good enough?
Answer:
1. A subscript or superscript is a character that is set slightly below or above the normal line of type, respectively. It is usually smaller than the rest of the text. Subscripts appear at or below the baseline, while superscripts are above.
2. In mathematics, a coefficient is a multiplicative factor in some term of a polynomial, a series, or any expression; it is usually a number, but may be any expression. In the latter case, the variables appearing in the coefficients are often called parameters and must be clearly distinguished from the other variables.
3. In rhetoric, a parenthesis or parenthetical phrase is an explanatory or qualifying word, clause, or sentence inserted into a passage. The parenthesis could be left out and still form grammatically correct text. Parentheses are usually marked off by round or square brackets, dashes, or commas.
4. Chemical symbols are abbreviations used in chemistry for chemical elements, functional groups and chemical compounds. Element symbols for chemical elements normally consist of one or two letters from the Latin alphabet and are written with the first letter capitalised
5. The numero sign or numero symbol, №, is a typographic abbreviation of the word number indicating ordinal numeration, especially in names and titles. For example, using the numero sign, the written long-form of the address "Number 22 Acacia Avenue" is shortened to "№ 22 Acacia Avenue", yet both forms are spoken long
Explanation:
BTW i copied and pasted from the internet, i did not have time to write it all down cause im on an edge quiz, sorry.
Diploid cells have:
a. the regular number of chromosomes of the parent organism
b. twice the number of chromosomes of the parent organism
c. half the chromosomes of the parent organism
Answer:
c
Explanation:
Which two large landmasses formed when Pangaea first started to separate?
Answer:
Laurasia and Gondwanaland
Explanation:
Answer:
D
Explanation:
Why is it important to understand the properties of matter?
:It's important for scientists to know the properties of matter because all things are made up of matter. Each type of matter has different physical characteristics and scientists need to know and understand these characteristics to make calculations.
Explanation:
Answer:
its not
Explanation:
bc its dumb.. thx for the points
On the periodic table, periods are elements with similar
O Atomic Number
O Atomic properties
O Atomic Mass
O None of the Above
Answer:
B.) Atomic Properties
can I have brainliest?
[tex]Have\\a\\nice\\day[/tex]
Which factor most directly affects potential energy but not kinetic energy?
O Mass
O Density
O Velocity
Elasticity
What makes up an ionic compound?
A. A positive anion and a negative cation
B. A positive cation and a positive anion
C. A negative anion and a negative anion n
D. A positive cation and a negative anion
Pick all that apply
Answer: B
Explanation: Ionic compounds are compounds composed of ions, charged particles that form when an atom (or group of atoms) gains or loses electrons. (A cation is a positively charged ion; an anion is a negatively charged ion.)
11. When a plant is growing, coming into view that is known as:
A.Photosynthesis
B. Emergence
C.Xylem
D. Phloem
Answer:
B
............. M
Explanation:
Emergence
Why are the magnetic field lines closest together at the poles?
the importance of reproduction??
Answer:
The main significance of reproduction is to maintain continuity of species. It also helps in studying evolution as sexual reproduction results in variation among the species.Can scientists determine a more precise age of this snail fossil?
Answer:
Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages. Absolute dating is used to determine a precise age of a fossil by using radiometric dating to measure the decay of isotopes, either within the fossil or more often the rocks associated with it.
Explanation:
Answer:
mark the other person brainliest
Explanation:
Easy points
Please help quickly
Part 2: Determining Similarities
Using only the groups of the periodic table, choose one element that is chemically similar to each of the
following elements
Carbon
Cesium
Krypton
Magnesium
Aluminum
Bromine
Answer:
Magnesium, strontium, and barium belong to group 2A of the periodic table.
The first step in the scientific method usually is:
A:formulate a conclusion
B:conduct an experiment
C: develop a hypothesis
D: ask a question
Answer:
ask a question
Explanation:
You have to ask a question or solve a problem before you can develop a prediction/hypothesis, conduct an experiment or even make a conclusion. The question comes first.
Why it is important to replicate scientific experiments?
to detect mistakes
to confirm findings
to introduce more variables
to produce more trials with data
Its A CUHH!!!!!!
WHY???- BC I SAID SO CUHH
How many joules of energy are required to vaporize 512.0 g of water?
Answer:
The heat required to evaporate 512 g of water initially at 0°C is 1,371,340.8 J
Explanation:
The given parameters are;
The mass of water given in the question = 512.0 g
The specific heat capacity of water = 4.184 J/(g·°C)
The heat of vaporization of water = 2,260 J/g
The heat, Q, required to raise the temperature of 512.0 g from 0°C to 100°C is given as follows;
Q = 512 × 100 × 4.184 = 214,220.8 J
The heat required to vaporize 512.0 g of water at 100°C = Mass × Heat of Vaporization
The heat required to vaporize 512.0 g of water at 100°C = 512 × 2260 = 1,157,120 Joules = 1,157.12 kJ
The heat required to evaporate 512 g of water initially at 0°C is therefore;
214,220.8 J + 1,157,120 J = 1,371,340.8 J.
Question 1 (1 point)
ROOTS--What is NOT a root function in plants?
Answer:
deez nuets
Explanation:
bf gm Jr rj if dl if did fll j fll kd golf du is no u to
Calculate the energy needed to raise the temperature of 165.0 g of water from 10.0°C to 40.0°C. The specific heat capacity for water is 4.2J/g °C.
Answer:
20790 J
Explanation:
From the question given above, the following data were obtained:
Mass (M) = 165 g.
Initial temperature (T1) 10 °C.
Final temperature (T2) = 40 °C.
Specific heat capacity (C) = 4.2 J/g °C.
Heat (Q) required =?
Next, we shall determine the change in temperature of water. This can be obtained as illustrated below:
Initial temperature (T1) 10 °C.
Final temperature (T2) = 40 °C.
Change in temperature (ΔT) =?
ΔT = T2 – T1
ΔT = 40 – 10
ΔT = 30 °C
Finally, we shall determine the heat energy required to raise the temperature of the water as follow:
Mass (M) = 165 g.
Specific heat capacity (C) = 4.2 J/g °C.
Change in temperature (ΔT) = 30 °C
Heat (Q) required =?
Q = MCΔT
Q = 165 × 4.2 × 30
Q = 20790 J
Thus, the heat energy required to raise the temperature of the water is 20790 J
Below are models of two types of cells. Which of the following structures 2 points
are common to both cell types?
A. mitochondria and vacuoles
B. mitochondria and cell wall
C. vacuoles and chloroplasts
D. cell wall and chloroplasts
Answer:
D is the right answer cell wall and chloroplasts
Answer:D
Explanation: Because you know what each cell looks like
What is the relationship between the kinetic energy of molecules in a solid and a liquid? Justify your response in two or more complete sentences.
will give brainliest
Answer:
Gases have more kinetic energy than liquids
Explanation:
Gases have more kinetic energy than liquids. Liquids have more kinetic energy than solids. When a substance increases in temperature, heat is being added, and its particles are gaining kinetic energy. Because of their close proximity to one another, liquid and solid particles experience intermolecular forces.
hope this helps
Please tell me what the answer is please
Answer:
2
Explanation:
Answer:
The brain
Explanation:
1/4 checkpoint
Time of Trial #1 (s)
2. 15
Time of Trial #2 (s)
Time of Trial #3 (s)
Average time (s)
2.05
2.02
2.07
Use the table to answer the questions.
What is the fastest time trial for the first quarter checkpoint?
seconds
What is the slowest time trial for the first quarter checkpoint?
seconds
What is the range of times measured for this checkpoint?
Answer:
here's the answers
Explanation:
Answer:
1. 2.02
2. 2.15
3. 0.13
Explanation:
doing it now of EDG :)
The nucleus of an atom is made up of a dense ball
of_________and_____________surrounded by________.
Answer:
The nucleus of an atom is made up of a dense ball
of protons and neutrons surrounded by electrons.
Explanation:
We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus. Electron has a negative charge and is written as e⁻. The mass of electron is 9.10938356×10⁻³¹ Kg . While mass of proton and neutron is 1.672623×10⁻²⁷Kg and 1.674929×10⁻²⁷ Kg respectively.
Symbol of proton= P⁺
Symbol of neutron= n⁰
The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons. The umber of protons and electrons are always equal to make the atom electrically neutral and when an atom loses its valance electron the number of protons increases and thus positive charge increased and atom form cation.
!!please help asap ty only if you can ty!!!
2. How many atoms of zinc are present in 0.48 mol of zinc?
(show solution)
Answer:
2.89 × 10²³ atoms of zincExplanation:
The number of atoms of zinc can be found by using the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 0.48 × 6.02 × 10²³
We have the final answer as
2.89 × 10²³ atoms of zincHope this helps you
Answer:
2.89× 10²³ atom
Explanation:
Given data:
Number of atoms of Zn = ?
Number of moles of Zn = 0.48 mol
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
For example,
1 mole = 6.022 × 10²³ atom
0.48 mol × 6.022 × 10²³ atom / 1mol
2.89× 10²³ atom
355 g of chlorine gas (MW = 70.9 g/mol) isheld in a vessel with a fixed volume of 70.0 L. What is the pressure of the gas in atmospheres if it's temperature is 30.0 degrees celcius?
Answer:
1.78 atm
Explanation:
From the question given above, the following data were obtained:
Mass of Cl = 355 g
Molecular weight of Cl = 70.9 g/mol
Volume (V) = 70.0 L
Temperature (T) = 30 °C
Pressure (P) =?
Next, we shall determine the number of mole in 355 g of chlorine (Cl). This can be obtained as follow:
Mass of Cl = 355 g
Molecular weight of Cl = 70.9 g/mol
Mole of Cl =.?
Mole = mass /molecular weight
Mole of Cl = 355 /70.9
Mole of Cl = 5 moles
Next, we shall convert 30 °C to Kelvin temperature. This can be obtained as follow:
T(K) = T(°C) + 273
Temperature (T) = 30 °C
Temperature (T) = 30 °C + 273 = 303 K
Finally, we shall determine the pressure of the gas as illustrated below:
Volume (V) = 70.0 L
Number of mole (n) = 5 moles
Temperature (T) = 303 K
Gas constant (R) = 0.0821 atm.L/Kmol
Pressure (P) =?
PV = nRT
P × 70 = 5 × 0.0821 × 303
P × 70 = 124.3815
Divide both side by 70
P = 124.3815 / 70
P = 1.78 atm
Therefore, the pressure of the gas is 1.78 atm
The pressure of the gas in atmospheres if it's temperature is 30.0 degrees celcius is 1.77 atm.
How do we calculate pressure?Pressure of the given gas will be calculated by using the ideal gas equation as:
PV = nRT, where
P = pressure of chlorine gas = ?
V = volume of chlorine gas = 70 L
R = universal gas constant = 0.082 L.atm / K.mol
T = temperature chlorine = 30 degree celsius = 303 K
n is the moles of gas which can be calculated as:
n = W/M, where
W = given mass of chlorine gas = 355g
M = molar mass of chlorine gas = 70.9g/mol
n = 355/70.9 = 5 moles
On putting all these values on the above equation and calculate for P, we get
P = (5)(0.082)(303) / 70
P = 1.77 atm
Hence required pressure is 1.77 atm.
To know more about ideal gas equation, visit the below link:
https://brainly.com/question/15046679
3 examples of density synonyms
frequency.
quantity.
thickness.
body.
closeness.
concretion.
heaviness.
solidity.
The presence of which ion usually produces a colored solution? A. K+
B. F-
C. Fe2+
D. S2-
The presence of which Fe²⁺ ion usually produces a colored solution. Therefore, option C is correct.
What is an ion?An ion can be described as a chemical specie that exhibited a positive or negative charge. The term ‘ion’ can be referred to atoms or molecules with non-zero charges on them. Therefore, all atoms have more electrons than protons or more protons than electrons.
If the number of protons in atomic structure is greater than electrons are termed to hold a net positive charge and are referred to as cations. The ions that contain a greater number of electrons than protons in atomic structure hold a net negative charge are anions.
The electronic configuration of the iron is [Ar]3d⁶4s². As the iron atom losses 2 electrons in its valence shell, it becomes a cation Fe²⁺ ion. As it has four unpaired electrons produces a colored solution.
Learn more about an ion, here:
brainly.com/question/13692734
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