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3 years ago

Will mark BRAINLYIST please help

Chemistry

1 answer:

podryga [215]3 years ago

6 0

1.00mol is the correct answer

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A weather foreshows 35 m/h on the weather map. Which weather component does this number represent

melamori03 [73]

Answer:

this is the minutes and hours this is representing

8 0

3 years ago

How many grams of calcium chloride would you need to make 1 L of solution containing 5 ppm calcium (Ca)?

Tresset [83]

Explanation:

The given data is as follows.

Volume = 1 L, Concentration of Ca = 5 ppm or 5 mg/L

As 1 mg = 0.001 g so, 5 mg /L will be equal to 0.005 g/l. Molar mass of calcium is 40.078 g/mol.

Hence, calculate molarity of calcium as follows.

Molarity of Ca = $\frac{\text{given concentration}}{\text{molar mass}}$

= $\frac{0.005 g/l}{40.078 g/mol}$

Molarity of Ca = $1.25 \times 10^{-4} M$

Hence, molarity of $CaCl_{2}$ is $1.25 \times 10^{-4} M$ . Since, volume is same so, moles of calcium chloride will be $1.25 \times 10^{-4} mol$ .

Thus, we can conclude that mass of $CaCl_{2}$ will be as follows.

$1.25 \times 10^{-4} \times 110.984$ (molar mass of $CaCl_{2}$ = 110.984 g/mol)

= 0.0138 g

Thus, we can conclude that mass of $CaCl_{2}$ is 0.0138 g.

4 0

3 years ago

What role does the salt bridge play in a voltaic cell? It allows electrons to flow from the anode to the cathode.It allows migra

Mnenie [13.5K]

The answer is it contains the electrodes. Without the salt scaffold, the arrangement in the anode compartment would turn out to be decidedly charged and the arrangement in the cathode compartment would turn out to be contrarily charged, on account of the charge lopsidedness, the terminal response would rapidly stop.
It keeps up the stream of electrons from the oxidation half-cell to a decrease half cell, this finishes the circuit.

7 0

4 years ago

Using the HH eq. calculate the amounts (masses) of sodium phosphate monobasic monohydrate (NaH2PO4 H2O) and sodium phosphate dib

pishuonlain [190]

Drop out my dude whatever this is ain’t worth it

4 0

3 years ago

How many moles are in 1.9 x 1046 atoms of chromium?

faust18 [17]

Answer:

<h2>3.156 × 10²² atoms</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{1.9 \times {10}^{46} }{6.02 \times {10}^{23} } \\ = 3.156 \times {10}^{22}$

We have the final answer as

<h3>3.156 × 10²² atoms</h3>

Hope this helps you

8 0

3 years ago