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2 years ago

If your good at science you could help me out so much!

Chemistry

1 answer:

Andrei [34K]2 years ago

6 0

Answer:

Potassium (K) and Lithium (Li) for the fist one i cant see the second

Explanation:

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historically, the medical consequence suffered by consumers exposed to lead is A.) Stunted growth B.) infection C.) rashes D.) b

Oxana [17]

Lead can cause

D.) brain damage

Explanation:

Lead poisoning is a sort of metal poisoning generated by lead in the body. The brain is the most sensitive. Symptoms may comprise abdominal pain, illness, headaches, irritability, thought problems, inability to have children, and tingling in the hands and feet. It causes almost 10% of the intelligent weakness of otherwise unknown cause also can result in behavioral problems. Some of the outcomes are strong. In severe cases, anemia, convulsions, coma, or death may occur.

4 0

3 years ago

Read 2 more answers

Choose the correct word that describes the description. If you add too much sugar to the water, some of the crystals will sit on

Triss [41]

Answer:

saturated

Explanation:

7 0

2 years ago

A 12.82 g sample of a compound contains 4.09 g potassium (K), 3.71 g chlorine (Cl), and oxygen (O). Calculate the empirical form

Rina8888 [55]

The empirical formula of the compound is calculated as follows

first calculate the mass of oxygen= 12-(4.09 +3.71)= 5.02g

then calculate the moles of each element, moles = mass/ molar mass

moles of K = 4.09g/39 g/mol(molar mass of K) = 0.105 moles
moles of Cl = 3.71g/35.5 g/mol(molar mass of Cl) = 0.105 moles
moles of O = 5.02g/ 16g/mol(molar mass of O) = 0.314 moles

then calculate e mole ratio by dividing each mole by the smallest number of moles ( 0.105 moles)

K=0.105/0.105= 1
Cl=0.105 /0.105=1
O= 0.314/0.105=3

therefore the empirical formula = KClO3

7 0

3 years ago

Given the following reaction:

Wewaii [24]

Answer:

Approx. 4⋅g.

Explanation:

Moles of sulfuric acid =10.0⋅g98.08⋅g⋅mol−1=0.102⋅mol.

Now we have the molar quantity of sulfuric acid that react; we also have the stoichiometric equation that shows the molar equivalence of sulfuric acid, and lithium hydroxide.

Given the stoichiometry,

mass of water =0.102⋅mol×2×18.01.g.mol−1=??⋅g.

Why did I multiply the mass in this equation by 2? Am I pulling your leg?

3 0

2 years ago

Round off each number to the indicated number significant figures (sf):

qaws [65]

Answer :

(a) The given number in 2 significant figures will be, $3.6\times 10^3$

(b) The given number in 4 significant figures will be, $3.583\times 10^1$

(c) The given number in 3 significant figures will be, $2.24\times 10^1$

Explanation :

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

(a) The given number 00003554 converted into 2 significant figures.

In 00003554, there are 4 significant figures. Now we have to convert it into 2 significant figures.

The given number in 2 significant figures will be, $3.6\times 10^3$

(b) The given number 35.8348 converted into 4 significant figures.

In 35.8348, there are 6 significant figures. Now we have to convert it into 4 significant figures.

The given number in 4 significant figures will be, $3.583\times 10^1$

(c) The given number 22.4555 converted into 3 significant figures.

In 22.4555, there are 6 significant figures. Now we have to convert it into 3 significant figures.

The given number in 3 significant figures will be, $2.24\times 10^1$

7 0

3 years ago