Answer:
It's acidic.
Explanation:
What group is not assigned electron affinities on the periodic table?
Answer:
Explanation:
halogen group
Electron affinities are negative numbers because energy is released. The elements of the halogen group (Group 17) gain electrons most readily, as can be seen from their large negative electron affinitie
Answer:
tbh i liked how u ghosted me
Explanation:
The most concentrated solution from among those listed is
New colors produced when any two of the primary colors of pigment are mixed; red, green, and blue
Answer:
A simulated example of additive color mixing. Additive primaries act as sources of light. The primaries red, green, and blue combine pairwise to produce the additive secondaries cyan, magenta, and yellow. Combining all three primaries (center) produces white.
when all of the primary colors are mixed it makes black
Explanation:
Which of the following is not a sign that chemical reaction has taken place?
a. temperature change
b. formation of a liquid
c. color change
d. formation of a gas
Answer:
a
Explanation:
uh process of elimination
Temperature change, phase change to liquid or gas are all physical changes not chemical reactions. A color change indicates a chemical reaction has taken place.
What is a chemical change?Chemical changes are taking place by the breaking or making of chemical bonds. It results in the formation of a new product which is having different properties than the initial substances.
Physical changes does not involve any change in chemical bond. Phase changes, change in size, shape, conductivity, solubility etc. are physical changes. A change in temperature phase conversion into gas or liquid are all physical changes.
A change in color indicates that a new product is formed there. For example reddish brown rust is iron oxide formed by the reaction of Fe with oxygen. Therefore, option c is correct.
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which of the following is a renewable resource a. copper b. aluminum c. peanut oil d. natural gas
Answer: c. peanut oil
Explanation:
Things that let electricity go through them are called
Answer: they are called electrical conductors.
Explanation:
Some materials let electricity pass through them easily. These materials are known as electrical conductors. Many metals, such as copper, iron and steel, are good electrical conductors. That is why the parts of electrical objects that need to let electricity pass through are always made of metal.
Answer:
Electrical Conductors
Explanation:
1. Suppose that there were two isotopes of Sodium.
28% of the naturally occurring sodium atoms had a
mass of 22, and 72% atoms had a mass of 23. What
would the average atomic weight of sodium be?
Answer: C. The university surveys 600 randomly selected students who attend the university. Correct
Explanation:
22.72 is the average atomic weight of sodium.
What are isotopes?Isotopes are different versions of a specific element.
1st isotopes of 22u = 28%
2nd isotopes of 23u = 72%
The average atomic weight of sodium be=
22 x 28 + 23 x72
=2272/100
=22.72
Hence, 22.72 is the average atomic weight of sodium.
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What is an acid in Science
Answer :An acid is any hydrogen containing substance
Explanation: i hope it helps i got a little help from a friend
Convert 6.21 km to m
how different are the duck leeches offsprings from their parents
Select the correct answer. When a candle burns, which forms of energy does the chemical energy in the candle change to?, A. light and sound, B. heat and sound, C. light and heat, D. electric and light answer?
Answer:
B heat
Explanation:
3. Hydrogen reacts with nitrogen to produce ammonia according to the equation:
3H2(g) + N2(g) 2NH3(g)
Determine how much ammonia would be produced if 100g of N2 reacts?
Mass of ammonia produced : 121.38 g
Further explanationGiven
Reaction
3H₂(g) + N₂(g) ⇒ 2NH₃(g)
100g of N₂
Required
Ammonia produced
Solution
mol of N₂ :
[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{100}{28}\\\\mol=3.57[/tex]
From the equation, mol ratio of N₂ and NH₃ = 1 : 2, so mol NH₃ :
[tex]\tt \dfrac{2}{1}\times 3.57=7.14~moles[/tex]
mass of NH₃(MW=17 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=7.14\times 17\\\\mass=121.38~g[/tex]
Can anyone please help me with this????
Please help me.
What is the mass of Li-6 or Li-7
Answer:
mass number- 7 (round it to 7
Explanation:
Radio waves carry information from
A. antenna to antenna.
B. amplitude to frequency.
C. AM to FM.
D. space to Earth.
science question
Why water in considered as compound?
Answer with Explanation:
Water is a compound because it consists of two types of atoms (Hydrogen and Oxygen) that are chemically bonded. An "element" only consists of one type of atom, therefore, water is not an element but a compound. Its chemical formula is: [tex]H_{2} O[/tex]. This means that water consists of 2 atoms of Hydrogen that are bonded to an atom of Oxygen. Take note that a compound is different compared to the elements that it is made of. For example, water is essentially liquid in its form but it is different from the atoms of Hydrogen and Oxygen, which are gas in form.
Answer:
Water is a compound. It contains more than one element: hydrogen and oxygen atoms are joined together; as illustrated in the video clip Elements and Compounds, above. ... Water is not simply a mixture of hydrogen and oxygen; it contains hydrogen and oxygen atoms linked together in an ordered way.
In 0.4 mole of H2S, how many atoms of H are there?
Answer:
8
Explain
H: Ignoring the coefficient, we know there's 5+3=8 atoms
how long does it take to drive a distance of 260 miles at a speed of 65 mph?
Answer:
4 hours
Explanation:
Is 2CO + O2 -> 2CO2 A balanced or unbalanced equation
Answer:
It is balanced.
Explanation:
You have the same amount of atoms on both sides. 2 carbon and 4 oxygen.
A working model used to test a design is called a
Answer:
A working model used to test a design is called a
stop
2. How many liters of propane gas (C3H8) will undergo complete combustion with 34.0 L of oxygen gas? ___ C3H8 (g) + ___ O2 (g → ___ CO2 (g + ___ H2O(g
Answer:
6.8 liters of propane gas will undergo a complete combustion with 34.0 L of oxygen gas.
Explanation:
Given;
combustion reaction of propane and oxygen;
C₃H₈ + O₂(g) → CO₂(g) + H₂O(g)
Balance the chemical reaction as follows;
C₃H₈ + 5O₂(g) → 3CO₂(g) + 4H₂O(g)
From the balanced equation;
1 mole of C₃H₈ ---------------- 5 moles of 5O₂(g)
x Liters of C₃H₈ ----------------- 34.0 Liters of O₂(g)
x = 34 liters / 5
x = 6.8 liters
Therefore, 6.8 liters of propane gas will undergo a complete combustion with 34.0 L of oxygen gas.
What are the main functions of the human skeletal system?
A To support the body, protect the organs, produce blood cells, and store calcium.
To regulate the composition of body fluids by removing metabolic wastes and retaining a balance of water, salt, and other
nutrients
OcTo regulate and maintain bodily functions by producing hormones and releasing them into the bloodstream.
D. To enable the diffusion of oxygen into the bloodstream and the removal of carbon dioxide from the bloodstream.
Answer:
The answer is A.........
Answer:
It´s letter A
Explanation:
I have no idea how to do this help plz!
Please help!! I was sick when he went over this
Answer:
5.70×10^-11 m
Explanation:
A hydrate of CoCl2 has a mass of 15.80 g before heating. After heating the mass of the anhydrous compound is found to be 9.32 g explain how you would determine the formula of the hydrate and then write out the full name of the hydrate
Explanation:
Molar mass of Cobalt (II) chloride = 129.8g/mol
Moles of CoCl2 = 9.32/129.8 = 0.0718mol
Mass of H2O lost after heating = 15.80 - 9.32 = 6.48g
Moles of H2O = 6.48/18 = 0.36mol
Mole ratio of CoCl2 : H20
= 0.0718mol : 0.36mol
= 1 : 5
Hence the formula is CoCl2 . 5H2O, which is Copper (II) chloride pentahydrate.
How do water currents transfer heat different part of the ocean?
Answer:
Energy in the ocean and the atmosphere
Explanation:
Hope this helps!
What is the composition of the most common mineral compounds that make up Earth's crust and mantle? 1 silicon, oxygen, and one or more metal elements 2 sulfates, oxygen, and one or more nonmetal elements 3 carbonates, hydrogen, and one or more organic compounds 4 oxalates, oxygen, and one or more organic compounds
Answer:
(1) silicon, oxygen, and one or more metal elements
Explanation:
The earth's Crust is mainly composed of
Oxygen, Silicon, Aluminum, Iron, Calcium, Potassium, Sodium and Magnesium. 90% of the earth's Crust is composed of Silicates.
The earths Mantle is almost completely Silicate, oxygen and magnesium.
How many moles in 435 liters of Krypton gas at STP?
19.4 mol Kr
General Formulas and Concepts:Chemistry
Stoichiometry
Using Dimensional AnalysisGas Laws
STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 KMath
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right Explanation:Step 1: Define
435 L Kr at STP
Step 2: Identify Conversions
[STP] 22.4 L = 1 mol
Step 3: Convert
[tex]435 \ L \ Kr(\frac{1 \ mol \ Kr}{22.4 \ L \ Kr} )[/tex] = 19.4196 mol Kr
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
19.4196 mol Kr ≈ 19.4 mol Kr
Under which conditions of temperature and pressure would a 1-liter sample of a real gas behave most like an ideal gas
Answer:
high temperature and low pressure
Explanation:
An ideal gas is a type of gas which obeys the gas laws at all conditions of pressure and temperature. Whereas a real gas does not obey the gas laws and does not behave according to the kinetic molecular theory.
But a real gas almost behaves like an ideal gas and follow the kinetic molecular theory at a sufficiently high temperature ad low pressure.
does the state of matter change in sugar solution
Answer:
yes
Explanation:
the sugar was a solid but after being dissolved in a liquid it changed state