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igomit [66]
3 years ago
9

Atoms like sodium and lithium often lose electrons, which makes them

Chemistry
2 answers:
zvonat [6]3 years ago
7 0
More reactive than others
Savatey [412]3 years ago
4 0

Answer:

Good reducing agents

Explanation:

Atoms that have a trend to lose electrons are less electronegative than others  and also this makes them good reducing agents. This means that they can reduce other species by oxidating themselves

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CHEMISTRY MCQ HELP NEEDED, THANKS!
leonid [27]
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Thats the answer please mark me as brainiest

7 0
3 years ago
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What mass of oxygen is needed for the complete combustion of 4.60×10−3g of methane?
sp2606 [1]
First step in answering the question is to establish a balanced chemical reaction equation. More specifically, a combustion chemical equation. 

CH4 + 2O2 ---> CO2 + 2H20

Then using dimension analysis: 

4.60*10^{-3} g CH4 ( \frac{moleCH4}{16 g CH4}) * ( \frac{2mole O2}{mole CH4}) * ( \frac{32 g O2}{mole O2} ) =  0.0184 g O_{2}
7 0
3 years ago
Which statement accurately describes the evidence that scientists gather using fossils? Check all that apply.
OLga [1]

Complete question is;

Which statements accurately describe the evidence that scientists gather using fossils? Check all that apply.

A) The fossil record can be used to date rocks.

B) Living things with many cells have always lived on Earth.

C) Simple organisms are found only in young rocks.

D) Geologists study ancient remains of plants and animals.

E) Scientists can figure out what ancient living things ate.

F) Pollen and seeds help provide clues about ancient climates.

Answer:

A) The fossil record can be used to date rocks

E) Scientists can figure out what ancient living things ate.

F) Pollen and seeds help provide clues about ancient climates

Explanation:

In scientific research, fossils are sometimes referred to as animals and plant. Now, in studying records of fossils, it will be easy to know the length of existence of living things on the Earth. Also, we can be able to identify the manner in which different relationships exists between plants and animals by predicting their lifestyles, location of their habitation e.t.c which can be used to predict the old time climates.

Looking at the options given in relation to the explanation given, options A, E & F are correct

5 0
3 years ago
Imagine that you run this experiment and that the initial change in pressure is 0.0023 atm/s. what is the initial reaction rate?
svet-max [94.6K]

\text{reaction rate} = 9.6 \times 10^{-5} \; \text{mol}\cdot\text{L}^{-1} \cdot \text{s}^{-1}

Explanation:

Concentration c = n / V;

The reaction see a 0.0023 \; \text{atm} change in pressure per second. By the ideal gas law, this quantity would correspond to a change in concentration, n/V of

c = n / V = P / (n \cdot R) = 0.0023 / ((273.15 + 20) \times 0.0821 ) = 9.6 \times 10^{-5} \; \text{mol}

where the ideal gas constant R = 0.0821 \; \text{L} \cdot \text{atm} \cdot \text{mol}^{-1} \cdot \text{K}^{-1}.

By definition, \text{reaction rate} = \Delta \text{concentration} / \Delta\text{time}

Therefore, for this particular reaction

\text{rate} = 9.6 \times 10^{-5} \; \text{mol} / (1 \; \text{s} ) = 9.6 \times 10^{-5} \; \text{mol}  \cdot \text{L}^{-1} \cdot \text{s}^{-1}

6 0
3 years ago
A compound has an empirical formula of CH2 and a molar mass of 70.15. What is its molecular formula?
lina2011 [118]
<h3>Answer:</h3>

Cyclopentane (C5H10)

<h3>Explanation:</h3>

The molar mass of CH2 is about 14.3, Since empirical is a ratio just divide the given molar mass by the molar mass of the empirical. 70.15/14.3=5 So now multiple everything by 5 in the empirical equation.

So, a compound that has an empirical formula of CH2 and a molar mass of 70.15 will have molecular formula of" C5H10".

7 0
3 years ago
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