All categories

3 years ago

Which of the following is necessary for photosynthesis?

Chemistry

1 answer:

Shkiper50 [21]3 years ago

4 0

Answer:

Explanation:

Water is necessary. Since during photosynthesis water reacts with carbon dioxide to form glucose and oxygen.

Calcium is a big NO!!.

You might be interested in

A solution prepared by dissolving 0.100 mole of propionic acid in enough water to make 1.00 L of solution is observed to have a

torisob [31]

Answer:

C) $k_a=1.3\times 10^{-5}$

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,

pH = - log [H⁺]

The expression of the pH of the calculation of weak acid is:-

$pH=-log(\sqrt{k_a\times C})$

Where, C is the concentration = 0.5 M

Given, pH = 2.94

Moles = 0.100 moles

Volume = 1.00 L

So, $Molarity=\frac{Moles}{Volume}=\frac{0.100}{1.00}\ M=0.100\ M$

C = 0.100 M

$2.94=-log(\sqrt{k_a\times 0.100})$

$\log _{10}\left(\sqrt{k_a0.1}\right)=-2.94$

$\sqrt{0.1}\sqrt{k_a}=\frac{1}{10^{2.94}}$

$k_a=1.3\times 10^{-5}$

4 0

3 years ago

Which is more concentrated, a solution containing 10g of NaCl in 100 g

Pavel [41]

Answer:

The answer is the solution containing the 90g of water.

Explanation:

Because both solutions have the same amount of the sodium chloride, the concentration would be the same if they both had the same amount of water.

Because the second solution has less water, there is more of the sodium chloride per each drop of water.

I hope this helps :)

4 0

3 years ago

Based on the name, which substance is a covalent compound?

jek_recluse [69]

Compounds that has two elements on the formula can be bonded by ionic or covalent bond. If the compound is a metal and a non-metal then it will be ionic bonding. However, when it involves two non-metals, then it will have covalent bonding.

3 0

3 years ago

PLEASE HELP

Vinvika [58]

Answer:

11.6 grams of MgO can be produced with 4.63 grams of oxygen.

Explanation:

$2Mg+O_2\rightarrow 2MgO$

Mass of oxygen gas = 4.63 g

Moles of oxygen gas = $\frac{4.63 g}{32 g/mol}=0.145 mol$

According to reaction, 1 mole of oxygen gas gives 2 moles of magnesium oxide, then 0.1447 moles of oxygen gas will giv e:

$\frac{2}{1}\times 0.145 mol=0.29 mol$ of magnesium oxide

Mass of 0.2894 moles of magnesium oxide:

= 0.29 mol × 40 g/mol = 11.6 g

11.6 grams of MgO can be produced with 4.63 grams of oxygen.

5 0

3 years ago

14) A wheelbarrow is experiencing two forces. One is pushing 5 N to the east and the other 5 N in the exact opposite direction.

nasty-shy [4]

D. it isn't accelerating

7 0

3 years ago

Read 2 more answers