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2 years ago

6

Advantages of solar energy

2 answers:

erastova [34]2 years ago

8 0

Renewable energy source
reduces electric bills
low maintenance costs
reduced needs for fossil fuels and foreign oils

Scorpion4ik [409]2 years ago

8 0

Another one is Electricity use

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True or false when matter changes it’s state it is a physical change because it is the same substance the whole time.

Blababa [14]

Answer:

true

Explanation:

5 0

2 years ago

For the following pairs of ions, use the concept that a chemical compound must have a net charge of zero to predict the formula

Dafna11 [192]

$\\ \sf\longmapsto FeP$

$\\ \sf\longmapsto Fe_2S_3$

$\\ \sf\longmapsto FeCl_2$

$\\ \sf\longmapsto MgCl_2$

$\\ \sf\longmapsto MgO$

$\\ \sf\longmapsto Mg_3N_2$

$\\ \sf\longmapsto Na_3P$

$\\ \sf\longmapsto Na_2S$

$\\ \sf\longmapsto CoO$

$\\ \sf\longmapsto Co_2S_3$

$\\ \sf\longmapsto AlCl_3$

$\\ \sf\longmapsto CsBr$

$\\ \sf\longmapsto Ti_2O_4$

$\\ \sf\longmapsto Ag_2S$

4 0

2 years ago

Suppose you need to prepare 141.9 mL of a 0.223 M aqueous solution of NaCl. What mass of NaCl do you need to use to make the sol

Afina-wow [57]

Answer:

1.811 g

Explanation:

The computation of the mass need to use to make the solution is shown below:

We know that molarity is

$Molarity = \frac{Number\ of\ moles}{Volume\ in\ L}$

So,

$Number\ of\ moles = Molarity\ \times Volume\ in\ L$

$= 0.223\times 0.141$

= 0.031 moles

Now

$Mass = moles \times Molecualr\ weight$

where,

The Molecular weight of NaCl is 58.44 g/mole

And, the moles are 0.031 moles

So, the mass of NaCL is

$= 0.031 \times 58.44$

= 1.811 g

We simply applied the above formulas

3 0

2 years ago

If one object has more mass than another then it weighs more or less than the other object?

PSYCHO15rus [73]

It would weigh more: the more mass an object has the more weight is added

6 0

3 years ago

Calculate the average reaction rate of Cl2 consumed using the following information. H2 + Cl2 yields 2 HCl A table with three co

klemol [59]

Answer : Option D) 2.50 X $10^{-3}$ Mol/(L s)

Explanation: While calculating the average reaction rate for the given reaction in terms of Cl;

$H_{2} + Cl_{2} ----\ \textgreater \ 2HCl$ .

using the rate equation which is;

$\frac{-1}{1}$ $\frac{delta [Cl]}{delta t}$ =

$\frac{- 0.0875 - 0.0625}{10s - 0s}$ = 2.50 X $10^{-3}$ Mol/(L s)

5 0

2 years ago