Answer:
i am quite unsure what you want me to answer but if you explain it to me w ould live to help
Explanation:
Answer:
obsidian
Explanation:
because it is an igneous rock which is smooth
Answer:
Cl^-<NO3^-<H2O<F^-<CN^-
Explanation:
When we talk about base strength we are referring to how easily a chemical specie accepts protons.
The greater the ability of a specie to accept H^+, the greater its base strength.
The order of increasing base strengths of the species listed are shown in the answer above.
Answer: 3.024 g grams of hydrogen are needed to convert 76 grams of chromium(III) oxide, 
Explanation:
The reaction equation for given reaction is as follows.

Here, 1 mole of
reacts with 3 moles of
.
As mass of chromium (III) oxide is given as 76 g and molar mass of chromium (III) oxide
is 152 g/mol.
Number of moles is the mass of substance divided by its molar mass. So, moles of
is calculated as follows.

Now, moles of
.given by 0.5 mol of
is calculated as follows.

As molar mass of
is 2.016 g/mol. Therefore, mass of
is calculated as follows.

Thus, we can conclude that 3.024 g grams of hydrogen are needed to convert 76 grams of chromium(III) oxide,
.