⚗️ chemistry

1. **Problem statement:** We have a cylindrical beaker with radius 4 cm and height 12 cm. We need to find its volume, then calculate the volumes of acid and water when filled with

1. **State the problem:** We want to find how many moles of Al₂(SO₄)₃ are present in 50.0 mL of 0.250 M Al₂(SO₄)₃ solution. 2. **Formula used:** Molarity (M) is defined as moles of

1. **State the problem:** We want to find how many grams of Al(NO3)3 can form when 200.0 mL of 0.500 M Al2(SO4)3 reacts with excess Ba(NO3)2. 2. **Given reaction:**

1. The problem is to balance the chemical equation: 2KNO3 \rightarrow 2KNO3 + 3O2. 2. The general rule for balancing chemical equations is that the number of atoms of each element

1. The problem is to determine if the chemical equation is balanced. 2. To check if a chemical equation is balanced, the number of atoms of each element must be the same on both si

1. **State the problem:** We need to find how many grams of water are formed when 85.0 mL of 0.750 M KOH reacts completely with HNO3. 2. **Write the balanced chemical equation:**

1. **State the problem:** Find the number of moles in 98.3 g of Aluminum Hydroxide, Al(OH)$_3$. 2. **Formula used:** Number of moles $n = \frac{\text{mass}}{\text{molar mass}}$

1. **State the problem:** Find the molar mass of ammonium phosphate, which has the chemical formula $\mathrm{(NH_4)_3PO_4}$. 2. **Formula and important rules:** The molar mass is t

1. **State the problem:** We need to find the mass of water formed when 145.0 mL of 1.5 M acetic acid reacts with 195.0 mL of 1.25 M sodium bicarbonate. This is a limiting reactant

1. **Stating the problem:** Balance the chemical equation for the reaction sodium hydroxide + barium sulphide → sodium sulphide + barium hydroxide. 2. **Write the unbalanced equati

1. **Problem:** Consider the combustion of carbon monoxide in oxygen gas: $$2 \text{ CO}(g) + \text{O}_2(g) \to 2 \text{ CO}_2(g)$$

1. **State the problem:** We need to find the mass of chemical B required when 1.4 g of chemical A is used, based on the graph showing a linear relationship between the masses of c

1. **State the problem:** We need to find the mass of chemical B when 2.2 g of chemical A is used, given a linear relationship between the masses. 2. **Identify the relationship:**

1. **State the problem:** We have a 1.0 L buffer solution with 0.250 M benzoic acid (C6H5COOH) and 0.250 M sodium benzoate (C6H5COONa). We add 0.010 mol of Ca(OH)2 and want to find

1. **Stating the problem:** Convert grams (g) of a substance to the number of particles using moles and Avogadro's number. 2. **Formula and rules:**

1. **State the problem:** We want to find the mass of one molecule of PO3 using dimensional analysis. 2. **Identify the formula:** The mass of one molecule can be found by dividing

1. The problem involves identifying the states of matter represented by three cubes: one half-filled with liquid, one containing gas, and one fully solid. 2. States of matter are t

1. **State the problem:** Determine whether the combustion of methane is exothermic or endothermic based on the given bond energies and reaction enthalpy. 2. **Recall definitions:*

1. **State the problem:** Calculate the heat of reaction (\(\Delta H_{rxn}\)) for the combustion of methanol using bond enthalpies. 2. **Formula:** \(\Delta H_{rxn} = \text{Energy

1. The problem is to identify the answers to the crossword clues related to explosive chemistry. 2. Each clue corresponds to a chemistry term or concept. We will solve the first cl

1. **Problem statement:** We want to find the concentration of CO_2 in ppm that causes the ocean pH to drop from 8.3 to 7.8. 2. **Given relation:**