Can show some work for 4x = -12
Answers
First, divide both sides by 4. / Your problem should look like:
Second, since 4 goes into 3 to get 12, simplify it by 3. / Your problem should look like:
Answer: x = -3
divide 4 on both sides 4x divided by 4 is x then u take 12 divided by 4 and it equals -3 so x= -3
Related Questions
What is the relationship between accuracy and precision? Please use at least 2 complete content related sentences.
Is crumpling a piece of paper chemical changes
Are spider multicellular
What makes up soil besides rock particles,minerals,air,and water?
Answers
Answer: the reason why the balance increases is because it is heavier so that's why it increases more
Explanation: the definition for balance is the ability to move or to remain in a position without losing control or falling. : a state in which different things occur in equal or proper amounts or have an equal or proper amount of importance.
Mass is the amount of matter something is made from. Big things are generally more massive than small ones. If you have a lump of iron or copper and take it to different places on Earth (or even the Moon) to measure it's mass, you'll always get the same result.
Weight is a measurement of how much the force of gravity acts on a given amount of mass. The force of gravity varies slightly all over Earth so, while your lump of iron has the same mass, its weight varies: it might weigh a little bit more in Bangladesh than it does in Tibet. What about on the Moon? Gravity is about one sixth the strength on the Moon as it is on Earth. So things weigh only one sixth as much on the Moon as they do on Earth, even though their mass is exactly the same in both places. Why are things heavier on Earth? Essentially because Earth is so much more massive than the Moon. It attracts objects with more force—and that gives them more weight.
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Hope this helps
Answers
Answer:
In of cobalt atoms there are
mol Co
Explanation:
Step 1 : Identify the relationship between 1 mole Cobalt and Avogadro's number of atoms.
Avogadro’s number is number of units present in one mole of any substance (defined as its molecular weight in grams)
Step 2: Divide the given atoms of cobalt by the number of atoms per mol.
Given atoms of cobalt is
Now by performing division
Number of moles of cobalt (Co) atoms in cobalt atoms is
=
=
=
=
2. Plasmas have a net negative charge.
3. The number of protons in an element is always equal to the number of neutrons.
4. Solids have a fixed mass, volume, and shape.
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Answer: Solids have a fixed mass, volume, and shape.
Explanation: Solids are the substances which have fixed shape, fixed volume and mass due to its close packed structure.
Dalton explained that all the elements are made up of small indivisible particle known as Atoms but after some time this was proved wrong as atoms is not indivisble, it conatins sub atomic particle like electrons, protons, neutrons etc.
Plasmas are considered as the fourth state of matter which contains equal quantity of positive ions and negative electrons.
The number of protons are equal to the number of electrons. The sum of number of protons and neutrons make the atomic mass quantity.
which ones are acids and which ones are bases
Answers
Answer:
- HNO₃ and H₃O⁺ are acids
- H₂O and NO₃⁻ are bases
Explanation:
The chemical equation is:
- HNO₃ + H₂O → H₃O⁺ + NO₃⁻
There are several definitions of acid and bases: Arrhenius', Bronsted-Lowry's and Lewis'.
Bronsted-Lowry model defines and acid as a donor of protons, H⁺.
In the given equation HNO₃ is such substance: it releases an donates its hdyrogen to form the H₃O⁺ ion.
On the other hand, a base is a substance that accepts protons.
In the reaction shown, H₂O accepts the proton from HNO₃ to form H₃O⁺.
Thus, H₂O is a base.
In turn, on the reactant sides the substances can be classified as acids or bases.
H₃O⁺ contain an hydrogen that can be donated and form H₂O; thus, it is an acid (the conjugated acid), and NO₃⁻ can accept a proton to form HNO₃; thus it is a base (the conjugated base).
Answers
Answer:
6.2 g
Explanation:
In a first-order decay, the formula for the amount remaining after n half-lives is
where
N₀ and N are the initial and final amounts of the substance
1. Calculate the number of half-lives.
If
2. Calculate the final mass of the substance.
Answers
Answer:
Explanation:
Density:
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
Formula:
D=m/v
D= density
m=mass
V=volume
Symbol:
The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.
Given data:
Mass = 1.060 g
Volume = 1.0 mL
Density in correct number of significant figures= ?
Solution:
d = m/v
d = 1.060 g / 1.0 mL
d = 1.06 g/ mL
The density 1.06 g/mL contain three significant figures Henry should report it 1.1 g/mL having the only one digit after decimal because in given values 1.060 and 1.0 the least number of significant figures after the decimal is 1 that's why the final result must have one significant figure after decimal.
Answer:
C
Explanation: There are three significant figures.