Urgent help me please answer it if you know it

Chemistry

1 answer:

Nuetrik [128]3 years ago

4 0

I think it is c.

i know that plants take in co2 to then make oxygen and they need water and sunlight to grow and live.

You might be interested in

A hydrated salt is a solid that includes water molecules within its crystal structure. A student heated a 12.10-gram sample of a

sveticcg [70]

Answer : The percent by mass of water the salt contain is, 55.3 %

Explanation : Given,

Mass of hydrated salt = 12.10 g

Mass of salt = 5.41 g

First we have to calculate the mass of water.

Mass of water = Mass of hydrate salt - Mass of salt

Mass of water = 12.10 g - 5.41 g

Mass of water = 6.69 g

Now we have to calculate the percent by mass of water the salt contain.

$\text{Percent by mass of water}=\frac{\text{Mass of water}}{\text{Mass of hydrate salt}}\times 100$

Now put all the given values in this expression, we get:

$\text{Percent by mass of water}=\frac{6.69g}{12.10g}\times 100$

$\text{Percent by mass of water}=55.3\%$

Therefore, the percent by mass of water the salt contain is, 55.3 %

5 0

3 years ago

Balance the following chemical equation (if necessary):

dybincka [34]

Answer: SiCl₄(s) + 4 H₂O(l) → H₄SiO₄(aq) + 4 HCl(aq)

Explanation:
You can pretend there is an imaginary line splitting the chemical equation into two on the arrow to help balance the equation.
Balance out chlorine on both sides, add the coefficient 4 to HCl
now there are 4 chlorines on the left and the right side.
Then, balance out Hydrogen on both sides, add the coefficient 4 to H₂O
now, there are 4*2=8 hydrogens on the left and 4+4=8 hydrogens on the right.
Counting the total number of atoms on both sides of the arrow, the equation is balanced
1 Si = 1 Si
4 Cl = 4 Cl
4 O = 4 O
8 H = 8 H