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3 years ago

Which of these elements has a smaller atomic #? 1=aluminum 2=beryllium 3=tungsten

Chemistry

1 answer:

enot [183]3 years ago

6 0

2
refer to periodic table for explanation

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Which element has the lowest ionization energy?

UNO [17]

C the answer is cesium, study's show that it has the lowest ionization out of all elements. Hope this helped!

4 0

3 years ago

Read 2 more answers

Hydrogen and helium in the universe were formed by which of these phenomena?

baherus [9]

I think the answer is a

5 0

3 years ago

A. Synthesis.

Irina-Kira [14]

Answer:

Double replacement

Explanation:

The given reaction is double replacement reaction.

CaCO₃ + 2HCl → CaCl₂ + H₂CO₃

Double replacement:

It is the reaction in which two compound exchange their ions and form new compounds.

AB + CD → AC +BD

while,

Synthesis reaction:

It is the reaction in which two or more simple substance react to give one or more complex product.

Decomposition:

It is the reaction in which one reactant is break down into two or more product.

AB → A + B

Single replacement:

It is the reaction in which one elements replace the other element in compound.

AB + C → AC + B

7 0

3 years ago

A typical aspirin tablet contains 5.00 grains of pure aspirin analgesic compound. The rest of the tablet is

Pavel [41]

Answer:

$Tablets=193$

Explanation:

Hello,

In this case, given that a typical aspirin tablet contains 5.00 grains of pure aspirin, the first step here is to compute the mass of those grans per tablet given that 1.00 g = 15.4 grains:

$m=5.00grains*\frac{1.00g}{15.4grains}=0.325g$

In such a way, the number of aspirin tablets are computed considering the total mass of aspirin and the mass per tablet:

$Tablets=\frac{62.7g}{0.325g}\\ \\Tablets=193$

Best regards.

8 0

4 years ago

0.28gram of NH3 on decomposition gave 0.25gram of nitrogen and hydrogen. Find the volume of hydrogen evolved at Ntp. (2gram hydr

hodyreva [135]

The volume of H₂ evolved at NTP=0.336 L

<h3>Further explanation</h3>

Reaction

Decomposition of NH₃

2NH₃ ⇒ N₂ + 3H₂

conservation mass : mass reactants=mass product

0.28 NH₃= 0.25 N₂ + 0.03 H₂

2 g H₂ = 22.4 L

so for 0.03 g :

$\tt \dfrac{0.03}{2}\times 22.4=0.336$

7 0

3 years ago