What is density of an apple
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When dissolved beryllium chloride reacts with dissolved silver nitrate in water, aqueous beryllium nitrate and silverchloride powder are made.
Over a long period of time, a group of people were exposed to high degrees of UV radiation from the sun. While no one became sick immediately, doctors did predict that those exposed had an increased risk of cancer in skin cells. Which type of mutation will this exposure cause? A. acquired, harmful B. acquired, neutral C. inherited, beneficial D. inherited, neutral
How long the Earth takes to rotate on its axis and what Earth’s rotation causes?
Which of the following statements is true?1. Dalton believed atoms were made mostly of empty space. 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:BaCl2 + Al2(SO4)3 -->BaSO4 + AlCl3.
Explanation:
136 g/mol
154 g/mol
164 g/mol
172 g/mol
172 is correct
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Answer:
Option d = 172 g/mol
Explanation:
Formula mass of [CaSO₄.2H₂O]
Formula mass = 40.078 + 32.065 + 4×16 + 4 + 16×2
Formula mass = 40.078 + 32.065 + 64 + 4 + 32
Formula mass = 172.143 g/mol
so, 172 g/mol is the correct answer.
The formula mass of compound calcium sulfate dihydrate is 172 g/mole.
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
The formula mass of compound = 40+32+16×4+4+32=172 g/mole.
Learn more about compound,here:
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Answer:
moles of NaCl per liter of solution.
Explanation:
- [NaCl] is an expression of the concentration of NaCl.
- If the concentration is the molarity;
Molarity can be defined as the no. of moles of solute dissolved per a 1.0 L of the solution.
- For [NaCl] is a symbol for: moles of NaCl per liter of solution.
Answer: moles of per liter of solution
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.
where,
n= moles of solute
= volume of solution in L
Square brackets represents the concentration of a substance i.e. amount of solute dissolved per liter of the solution.
Thus represents moles of
per liter of solution.
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1 mole of H2 = 2g
1 mole of O2 = 32g
1 mole of H2O = 18g
according to the reaction:
2*2g H2---------------32g O2
1,6g H2----------------- x g O2
x = 12,8g O2
so reaction is stechiometric
32g O2---------------- 2*18g H2O
12,8g O2 -------------- x
x = 14,4g H2O
answer: 14,4g of water vapour
Select one:
a. Those in the third shell from the nucleus.
b. Those in the second shell from the nucleus.
c. Those in the outermost shell.
d. Those in the innermost shell.