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blagie [28]
3 years ago
10

Proportional tax regressive tax progressive tax

Chemistry
1 answer:
Crazy boy [7]3 years ago
3 0

I am sorry can you explain it more?

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A force can exist between two charged particles or objects even if they're as small as subatomic particles. between which of the
murzikaleks [220]
D. a and b because same-charged particles repel each other
8 0
3 years ago
C
Schach [20]

Answer:

2.74 M

Explanation:

Given data:

Mass of sodium chloride = 80.0 g

Volume of water = 500.0 mL

Molarity of solution = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Now we will convert the mL into L.

500.0 mL× 1 L /1000 mL =  0.5 L

In next step we will calculate the number of moles of sodium chloride.

Number of moles = mass/molar mass

Number of moles = 80.0 g/ 58.4 g/mol

Number of moles = 1.37 mol

Molarity:

M =  1.37 mol/ 0.5 L

M =  2.74 M

8 0
3 years ago
A chemist wants to make 6.5 L of a .350M CaCl2 solution. What mass of CaCl2(in g) should the chemist use?
kotykmax [81]
First M stands for Molarity which is (moles of solute) / (Liters of solution). we also know that moles = (mass) / (molar mass). so we can form some equations here. We know:
Molarity (M) = moles (mol) / Liters (L)
moles (mol) = (mass) / (molar mass)

we can substitute the (mass) / (molar mass) for (moles) and get:
M = [(mass) / (molar mass)] / Liters

we can now isolate mass and get
M * Liters * molar mass = mass

now we need to find the molar mass of CaCl2 which is 110.98 g/mol

plug the values in and get
.350M * 6.5L * 110.98 g/mol = mass

mass = 252.4795g however the 6.5L has only 2 sig figs so i would say

mass CaCl2 = 2.5 * 10 ^2 g
5 0
3 years ago
Read 2 more answers
Express the rate of reaction in terms of the change in concentration of each of the reactants and products. 2A(g) → B(g) + C(g)
ankoles [38]
[B][C] / [A]^2

Products raised to the coefficients over reactants raised to the coefficients
8 0
3 years ago
Transpiration meaning and examples
FinnZ [79.3K]

Explanation:

Transpiration is the movement of water through plants using the xylem and also their loss from plants surfaces.

Water is a lost from plants from the leaves and the stomata. This water is usually replaced by the absorption of water by the root.

  • Transpiration is an important part of the water cycle in the biosphere.
  • Significant amount of water is lost from plant in the process of transpiration.
  • Transpiration water condenses in the atmosphere to form rain clouds.

An example of transpiration when water loses water from their leaves.

7 0
3 years ago
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