Answer:
Atomic number: 26
Atomic mass: 56
Net charge: +3
Explanation:
Are bath bombs pure substances or mixtures
Answer:
Yes.
Explanation:
Bath bombs are usually made from three key ingredients: baking soda, citric acid and cornstarch, said Frankie Wood-Black, an instructor in chemistry at Northern Oklahoma College and an experienced bath-bomb maker. Often, bath bombs also include dyes and perfumes, and sometimes they have epsom salt.
Answer: yes
Explanation:
Vocabulary crossword puzzle properties of minerals
Answer:
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Explanation:
A tiny crystal of a solid substance is added to an aqueous solution of the same substance. What would happen if the original solution was: 1) Super saturated 2) Unsaturated 3) Saturated.
Answer:
3.)Saturated
Explanation:
it was saturated and then turned super saturated
what do you mean by decimal number system
please give answer
What is the concentration of a solution containing 1.0 g of sodium hydroxide in 250 cm³ of solution?
A- 0.025 mol/dm³
B- 0.10 mol/dm³
C- 0.25 mol/dm³
D- 1.0 mol/dm³
Answer:
Correct option is
D-1.0mol/dm³
Mass of NaOH (m) = 1g
The volume of water (V) = 250 ml
Mol. wt of NaOH (m) = 40g/mol
Molarity (M) =M×V(ml)m×1000
M=40×2501×1000
M=101 or 0.1 M
A student group is involved in a restoration study of a nearby disturbed area. They decide to collect six soil samples and analyze them for carbon (C) and nitrogen (N). Two of the samples are found to be very high in C and N, but the other four samples are low in both. The students also notice that the color of the two soil samples that are high in C and N is very dark.
Requried:
What is the most likely explanation of the data?
The very dark soils samples that contain the highest amounts of carbon and nitrogen is loamy soil.
Soil is the outermost portion of the earth's crust on which plants grow. The appearance of a soil sample gives an idea of the type and nature of the soil it is.
We are told that two out of the six soil samples gathered are very dark and contains an enormous amount of carbon and nitrogen. These two must be samples of loamy soil.
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The minimum collision energy between two molecules in order for them to react is called A activation energy. B dispersal energy C spontaneous energy D transition energy.
A: activation energy
hope i helped :D
sodium chloride is a compound of sodium and chlorine. which of these elements is the alkali metal and which is the halogen. why
Answer:
Chlorine is a halogen and sodium is an alkali metal.
Explanation:
A doctor who specializes in treating diseases of nervous system
neurologist
nephrologist
ophthalmologist
cardiologist
Which of the following elements is the smallest?
A. Strontium (Sr)
B. Beryllium (Be)
C. Calcium (Ca)
D. Magnesium (Mg)
A chemical reaction resulting in the transfer of electrons or hydrogen atoms from one molecule to another is called a(n) _______ reaction.
Answer:
Explanation:
Oxidation reaction
The kind of reaction involving the transfer of electrons or hydrogen away from a molecule is called oxidation.
In the same vein, the molecule that receives the electron or the hydrogen atom is said to be reduced. This means that oxidation cannot exist in isolation without reduction.
In other words, oxidation is defined as:
Loss of electronsLoss of hydrogen atomsGain of oxygen atomsGain in oxidation numberWhile reduction is defined as:
Gain of electronsGain of hydrogen atomLoss of oxygen atomReduction in oxidation numberMore on oxidation/reduction reactions can be found here: https://brainly.com/question/3867774
given that the radiusof anion a2- is 0.290 nm, what would you expect the radius of a and a2+ to be
This problem is providing the ionic radius of an anion, A²⁻ as 0.290 nm and asks for that of the cation A²⁺ in comparison to the former.
Firstly, we need to recall the concept of ionic radius, as the distance between the nucleus and the outermost electron shell of an ion. In such a way, we can have two scenarios:
1. Anions result from the gain of electrons exhibited by a nonmetal, which means they turn out bigger than the neutral atom.
2. Cations result from the loss of electrons exhibited by a metal, which means they turn out smaller than the neutral atom.
With the aforementioned, we infer that the cation A²⁺, will me smaller than the anion A²⁻, which means it will have an ionic radius smaller than 0.290 nm.
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https://brainly.com/question/12026272https://brainly.com/question/19032815the temperature of absolute zero is stated as ___________.
Answer:
-273.15 degrees Celsius
-459.67 degrees Fahrenheit
It is considered to be coldest conceivable temperature and is impossible to reach
Explanation:
If you are looking for degrees it is
-273.15 degrees Celsius
-459.67 degrees Fahrenheit
or just 0 on the keilvin scale
1. What is the specific heat of a substance that requires 270 J of energy to raise the temperature of 4.2 grams by 25°C?
Heat required is mcΔT=100×0.39×50=1950 J
Solve any question of Thermodynamics with:-
The specific heat of the substance that requires 270 J of energy to raise the temperature is 2.57 J/g⁰C.
Specific heat capacity of the substanceThe specific heat capacity of the substance is calculated as follows;
Q = mcΔФ
where;
c is the specific heat capacityc = Q/mΔФ
c = (270) / (4.2 x 25)
c = 2.57 J/g⁰C
Thus, the specific heat of the substance that requires 270 J of energy to raise the temperature is 2.57 J/g⁰C.
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#SPJ2
According to Dalton, atoms cannot be SELECT ALL THAT APPLY a Created b Destroyed c Subdivided d Bonded
Answer:
The answer is subdivided,created or destroyed
Q: Arrange the element according to the increase radius or size
1. Na, K, Cs Fr, Rb
2. Ca, Sr, Ba, Ra, Mg
Answer:
Refer to the periodic table to do this.
Explanation:
1. Na, K, Cs Fr, Rb
Sodium, Potassium, Cesium, Francium, Rubidium
3, 4, 6, 7, 5
Ascending order: Na, K, Rb, Cs, Fr
2. Ca, Sr, Ba, Ra, Mg
Calcium, Strontium, Barium, Radium, Magnesium
4, 5, 6, 7, 3
Ascending Order: Mg, Ca, Sr, Ba, Ra
When doing the electronic configuration of the elements, count how many number of divides it has. For example, Na(Sodium) has 11 electrons and it is divided like this: 2,8,1. So it divides into 3 parts so there will 3 shells for sodium.
Hopefully this helps!!
Describe how to do an experiment to show that when you dissolve salt in water the salt is still there.
Answer:
When salt is dissolved in water, the particles of salt get into the spaces between particles of water and starts dissolving and disappear.
Explanation:
Fe(s) + CuSO4(aq) —> FeSO4(aq) + Cu(s)
This chemical equation represents a __ reaction.
A. synthesis
B. decomposition
C. neutralization
D. single replacement
Answer:
D
Explanation:
single replacement....iron combined with tetraoxosulphate (VI)
I need HELP A.S.P
B. A +ion (positive ion, one with extra positive charge)?
How do scientists analyze the TRAPPIST system?
Answer:
A team led by Michaël Gillon at the University of Liège in Belgium detected the planets using transit photometry with the Transiting Planets and Planetesimals Small Telescope (TRAPPIST) at the La Silla Observatory in Chile and the Observatoire de l'Oukaïmeden in Morocco.
Explanation:
This is just how the TRAPPIST system was discovered.
Here's the link about the information you need:
https://www.nasa.gov/press-release/nasa-telescope-reveals-largest-batch-of-earth-size-habitable-zone-planets-around
A car travels 76 km/hr for 11 hours. How far did the car travel in this time period (in kilometers)?
Answer:
836 km
Explanation:
76*11=836
Answer:
836km
Explanation:
76km/hr = 76×1000÷3600= 190/9 m/s
11hours =39600 s
Distance=speed×time
Distance=190/9 × 39600= 836,000m
So distance is 836,000m or 836 km.
This method is possible only if body is moving linearly and the velocity is constant.
If there is uniform acceleration use Newton's laws of motion.
If is acceleration is varying then use calculus methods.
If the average speed of a car is 45 km/hr, how far can it travel in 0.5 hours
Answer:
22.5 Km
Explanation:
45km/hr * 0.5 hr = 22.5km
Does this reaction meet the Law of Conservation of Mass? 2H2 + O2 → 2H2O explain.
Answer:
yes because on the left side 4 hydrogen in right side 4 hydrogen on the left side 2 oxygen in the right side 2 oxygen
Answer:
The Law of Conservation of Mass states that the mass of the system must remain constant over time as the system's mass cannot change because energy is not created nor destroyed. To tell if a chemical equation meets this law, check to see if the number of atoms is the same on both sides of the chemical equation.
Reactant Side:
4 atoms of Hydrogen2 atoms of OxygenProduct Side:
4 atom of Hydrogen2 atoms of oxygen.Remember, when counting the atoms in a equation the subscript is the number that represents the quantity of that specific atom. Subscripts are numbers that come after a symbol and below. If an element does not have a subscript, then it is understood that the subscript is 1. The coefficent represents the quantity of molecules, the coefficient multiplies everything in the formula.
The organelle that move proteins and other substances through the cell is the
Answer:
Endoplasmic reticulum
Explanation:
calculate the number of moles of ethanol acid in 30 cm³of 1 mol dm-³ solution
Answer:
May I assume "ethanol acid is just ethanol (it has one slightly acidic H atom). If so, the molar mass is 46.02 g/mole.
Explanation:
We have 30 cm^3 [30 ml] of 1.0 M (1 mole/liter) [1 dm³ = 1 liter].
That is 1 mole/liter. 30 ml would contain (0.030 liter)*(1 mole/1 liter) = 0.03 moles.
Write the balanced chemical equation for the following reaction. Also, classify the
reaction as sythesis, decomposition, single replacement, double replacement, or combustion.
aluminum sulfate + barium chloride —> aluminum chloride + barium sulfate
Answer:
Reaction: Al2(SO4)3 + 3BaCl2 --> 2AlCl3 + 3BaSO4
Type: Double Replacement
Explanation:
1.) First you need to understand what the different reactions are
a.) Synthesis: is a reaction where two or more substances will combine with each other to make one product.
Ex: A + B → AB
b.) Decomposition: when one compound breaks down into two or more substances. (Opposite of synthesis)
Ex: AB → A + B
c.) Single Replacement: when one element replaces another one in a reaction
Ex: A + BC → AC + B
d.) Double Replacement: when the positively charged cations and negatively charged anions of the reactants trade places. Normally this will be the two outer elements combining and the two inner ones combining.
Ex: AB + CD → AD + CB
e.) Combustion: when a substance reacts with oxygen gas and releases energy as light and heat.
Ex: CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g)
2.) From there you can write out the formula of the different reactants and products and balance the equation.
Why do we fill balloons
with helium gas instead
of oxygen gas?
Answer:
Helium is less dense. Because helium is lighter than air, a helium balloon rises, just as an air bubble rises in more dense water
Explanation:
Also why not. It just is.
Answer:
This is due to the fact that helium has a lower density. A helium balloon rises like an air bubble in more dense water because helium is lighter than air. Another gas lighter than air is hydrogen, which is even lighter than helium.
Explanation:
Gold's natural state has a definite shape and a definite volume. What is gold's natural state(s)?
O solid
liquid
ОООО
solid or gas
O liquid or gas
Answer:
Solid
Explanation:
what is the hybridization at each carbon atom in the molecule?
The carbon atoms are sp3 hybridized.
Hope this helps!
When the metal was added to the calorimeter, some of the water splashed out. How would the loss of water in the Styrofoam cup affect the final temperature
The final temperature of the cup may be less than accurate thereby affecting the entire results of the experiment carried out using the cup.
A styrofoam cup is an insulated material. A styrofoam cup prevents heat gain or looses from the cup. Heat is gained by the water inside the styrofoam cup. The cup prevents exchange of energy with the environment.
When water is lost from the styrofoam cup, the final temperature of the cup may be less than accurate thereby affecting the entire results of the experiment carried out using the cup.
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