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Lera25 [3.4K]
3 years ago
12

Do metals form anions or cations

Chemistry
1 answer:
sp2606 [1]3 years ago
6 0
They form only cations
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What is the mass of the hydrogen atoms in 1 mole of water
Katen [24]

<u>Answer:</u>

2.0158 grams

<u>Explantion:</u>

We are to find the mass of the hydrogen atoms in 1 mole of water.

We know that the formula of water is: H_2O

We can see, from the above mentioned formula, that water has 2 hydrpgen atoms.

From the periodic table, we get to know that Hydrogen has an atomic mass of 1.00794 grams.

As there are 2 atoms of hydrogen in water so 2 \times 1.00794 = 2.0158 grams is the answer

3 0
3 years ago
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A car is traveling at a speed of 95 mi/h. If there are 0.62137 miles (mi) in a kilometer,
SIZIF [17.4K]

Answer:

42 m/s

Explanation:

To we convert units for speed we can use dimensional analysis. First thing we do is seperate the measurement into a fraction. After this we can multiply by 1km over 0.62137 miles. We do this so that the miles cancel out.

\frac{95mi}{h} × \frac{1km}{0.62137mi} = \frac{95km}{0.62137h}

After this we can use a conversion factor and divide by 3.6.

\frac{95km}{0.62137h} ÷ 3.6 = 42 m/s

4 0
3 years ago
80 protons, 119 neutron
g100num [7]
Mercury-199 is composed of 80 protons, 119 neutrons, and 80 electrons.
4 0
2 years ago
When 1.50 g of ba(s) is added to 100.00 g of water in a container open to the atmosphere, the reaction shown below occurs and th
damaskus [11]

<u>Given:</u>

Mass of Ba = 1.50 g

Mass of H2O = 100.0 g

Initial temp T1 = 22 C

Final Temp T2 = 33.1 C

specific heat c = 4.18 J/g c

<u>To determine:</u>

The reaction enthalpy

<u>Explanation:</u>

The heat released during the reaction is:

q = - mc(T2-T1) = - (100+1.5) g *4.18 J/g C * (33.1-22) C = -4709.4 J

# moles of Ba = Mass of Ba/Atomic mass of Ba = 1.5 g/137 g.mol-1 = 0.0109 moles

ΔH = q/mole = - 4709.4 J/0.0109 moles = - 432 kJ/mol

Ans : The enthalpy change for the reaction is -432 kJ/mol


4 0
3 years ago
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What does O - H.....O - H represent?
yawa3891 [41]

Answer:

C)

Explanation:

It's a covalent bond because O and H are both non metals.

6 0
2 years ago
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