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Ket [755]
3 years ago
14

Aisha drops an antacid tablet in water and times how long it takes to dissolve. Which of the following will decrease the reactio

n rate?
increasing water temperature
decreasing water temperature
using more water



What is the end result of a nuclear fusion reaction?
two new atoms with smaller nuclei form
molecule of atoms forms
one new atom with a larger nucleus forms
new bonds between atoms are formed



The chemical reaction between iron (Fe) and oxygen (O) results in the loss of electrons from iron. This reaction is an example of _____.
oxidation
respiration
combustion
sublimation
Chemistry
2 answers:
Natali5045456 [20]3 years ago
5 0

A -decreasing water temperature

madam [21]3 years ago
4 0
1. Decreasing the temperature of the water.
2. One new atom with a large nucleus forms.
3.The reaction is an example of oxidation.
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Solutions are said to be what kind of mixture? A) Pure substance B) Heterogeneous C) Homogenous D) Element
laiz [17]
Solutions are said to be C. homogeneous mixtures, composed of two or more substances. It is usually liquid, however it may be solid or gas.
7 0
3 years ago
Some amount of hydrogen peroxide (H2O2) breaks down to produce 3 molecules of oxygen (O2) and 6 molecules of water (H2O). How ma
soldier1979 [14.2K]

Answer:

Atoms_H=12Atoms

Explanation:

Hello,

In this case, the only source of hydrogen is in the 6 molecules of water, therefore, the atoms of hydrogen, by applying stoichiometry with the Avogadro's number is:

Atoms_H=6moleculesH_2O*\frac{1molH_2O}{6.022x10^{23}moleculesH_2O}\frac{2molH}{1molH_2O}*\frac{6.022x10^{23}AtomsH}{1molH} \\Atoms_H=12Atoms

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3 0
2 years ago
Read 2 more answers
What type of bond is present in the Cl2 molecule?
Maksim231197 [3]

Answer: single covalent bond

Explanation: Chlorine is a simple molecule. each chlorine atom can count 8 electrons in its outer shell. with other chlorine atoms. One pair of shared electrons form a single covalent bond.

3 0
3 years ago
Read 2 more answers
How many atoms of nitrogen are present in 2.49 moles of nitrogen trifluoride ? atoms of nitrogen?
stepladder [879]
<span>Nitrogen trifluoride - NF3.
1 mol NF3 contains 1 mol atoms of Nitrogen
2.49 mol NF3 contains 2.49 mol atoms of Nitrogen

1 mol   ----  6.02 *10²³ atoms
2.49 mol ----- 2.49*6.02*10²³ = 15.0*10²³ atoms of N</span>
6 0
2 years ago
If a compound contain 40% sulphur and 59% oxygen ,find its empirical formula.
elixir [45]

Answer:

SO3

Explanation:

Data obtained from the question include:

S = 40%

O = 59%

To obtain the empirical formula, do the following:

Divide the above by their molar mass as shown below:

S = 40/32 = 1.25

O = 59/16 = 3.69

Next, divide by the smallest as shown below:

S = 1.25/125 = 1

O = 3.69/1.25 = 3

Therefore, the empirical formula is SO3

8 0
3 years ago
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