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Ksju [112]
3 years ago
13

How do I do this I need answers fast

Chemistry
1 answer:
MA_775_DIABLO [31]3 years ago
7 0
1.8 would be the top Sig fig
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What is a substance?
ANTONII [103]
A is the answer im pretty sure
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3 years ago
The Lewis structure of which molecule requires resonance structures?A.) MgCl2B.) SiO2C.) SO2D.) OCl2
inna [77]

Answer:  C.) SO2

Explanation:  Sulfur Dioxide is the gaseous molecule which can show the resonance through lewis dot structure due to the presence of lone pairs of electrons present on all of the three atoms of the molecules. Moreover , Sulphur forms pie bond with the oxygen using p orbitals which forms a network of the conjugated system that help to elaborate the reason of the formation of the resonance structure.

Options (a), (b), and (d) cannot form resonating structures as they involve the formation of the chemical bonds through single sigma bond.

4 0
3 years ago
How many significant figure does 60600 have?
irga5000 [103]
The answer would be 5. because the last zero is a holding place because the number is in front of the decimal. They other zero counts because they are being sandwiched.<span />
7 0
3 years ago
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What volume, in milliliters, of calcium chloride 15.0 M stock solution would you use to
Kamila [148]

<u>Answer:</u> The volume of stock solution of calcium chloride required is 10 mL.

<u>Explanation:</u>

A solution consists of solute and solvent. A solute is defined as the component that is present in a smaller proportion while the solvent is defined as the component that is present in a larger proportion.

To calculate the amount of solute needed, the formula used is:

C_1V_1=C_2V_2             ....(1)

where,

C_1\text{ and }V_1 are the concentration and volume of stock solution of calcium chloride

C_2\text{ and }V_2 are the concentration and volume of diluted solution of calcium chloride

Given values:

C_1=15.0M\\C_2=0.300M\\V_2=500mL

Plugging values in equation 1:

15.0\times V_2=0.300\times 500\\\\V_2=10mL

Hence, the volume of stock solution of calcium chloride required is 10 mL.

7 0
3 years ago
A 3.0 L cointainer contains 4 mol He, 2 mol Ne,and 1 mol Ar. What is the mole fraction of neon gas? What is the partial pressure
CaHeK987 [17]

Answer:

Partial pressure of Ne = 1.43 atm

Explanation:

Step 1: Data given

Volume = 3.0 L

Number of moles He = 4 moles

Number of moles Ne = 2 moles

Number of moles Ar = 1 mol

Total pressure = 5 atm

Step 2: Calculate total moles

Total moles = 4 moles + 2 moles + 1 mol

Total moles = 7 moles

Step 3: Calculate the mol ratio

Mol ratio = moles / total mol

Mol ratio He = 4 moles / 7 moles = 0.571

Mol ratio Ne = 2 moles / 7 moles = 0.286

Mol ratio Ar = 1 mol / 7 moles = 0.143 moles

Ste p4: Calculate partial pressure

PArtial pressure = mol ratio * total pressure

Partial pressure of Ne = mol ratio Ne * total pressure

Partial pressure of Ne = 0.286 * 5 atm

Partial pressure of Ne = 1.43 atm

8 0
3 years ago
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