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Sidana [21]
3 years ago
14

Hydrogen is an element. True False

Chemistry
2 answers:
padilas [110]3 years ago
7 0

Answer:

True

Explanation:

Hydrogen is one of the most abundant elements in the universe so yes

mixas84 [53]3 years ago
7 0

Answer:

true

Explanation:

Hydrogen is an chemical element

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What is the mass of 3.75 moles of NaCl
sasho [114]
M (NaCl) = n × M = 3.75 × 58.5 =
219.375 g

M (NaCl) = 23 + 35.5 = 58.5 g/mol
7 0
3 years ago
Read 2 more answers
The activation energy for a reaction is the energy difference between what two components of a reaction?
lora16 [44]

Answer:

Activation Energy is the Energy that Must be Overcome/reached by Reactants for Products to be formed.

I'd go with the 2nd Option.

4 0
3 years ago
Calculate ΔH for the reaction: C(graphite) + 2H 2(g) + 1/2 O 2(g) => CH 3OH(l) Using the following information: C(graphite) +
Alika [10]

Answer:

\Delta H for the given reaction is -238.7 kJ

Explanation:

The given reaction can be written as summation of three elementary steps such as:

C(graphite)+O_{2}(g)\rightarrow CO_{2}(g) \Delta H_{1}= -393.5 kJ

2H_{2}(g)+O_{2}(g)\rightarrow 2H_{2}O(l) \Delta H_{2}= (2\times -285.8)kJ

CO_{2}(g)+2H_{2}O(l)\rightarrow CH_{3}OH(l)+\frac{3}{2}O_{2}(g)  \Delta H_{3}= 726.4 kJ

---------------------------------------------------------------------------------------------------

C(graphite)+2H_{2}(g)+\frac{1}{2}O_{2}(g)\rightarrow CH_{3}OH(l)

\Delta H=\Delta H_{1}+\Delta H_{2}+\Delta H_{3}=-238.7 kJ

4 0
4 years ago
Anti-acids contain ingredients, such as aluminium hydroxide and magnesium hydroxide. Anti-acids can provide almost instant relie
Marrrta [24]

Answer:

help

Explanation:

3 0
2 years ago
ANSWER NEEDED ASAP!!!! Heat energy always flows in which direction?
Marta_Voda [28]

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A. Hot to Cold ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌‌ ‌ ‌ ‌

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